subject:(Mechanical characterization)

University of Wollongong

1. De Silva, Dinayadura Awanthi. Characterization of single network and interpenetrating network hydrogels of natural and synthetic polymers.

Degree: PhD, 2013, University of Wollongong

URL: 030301 Chemical Characterisation of Materials ; https://ro.uow.edu.au/theses/4042

► Progress in the field of tissue engineering is largely dependent upon the construction of materials that can maintain the mechanical characteristics during the tissue… (more)

Subjects/Keywords: hydrogels; characterization; swelling; mechanical

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APA (6^th Edition):

De Silva, D. A. (2013). Characterization of single network and interpenetrating network hydrogels of natural and synthetic polymers. (Doctoral Dissertation). University of Wollongong. Retrieved from 030301 Chemical Characterisation of Materials ; https://ro.uow.edu.au/theses/4042

Chicago Manual of Style (16^th Edition):

De Silva, Dinayadura Awanthi. “Characterization of single network and interpenetrating network hydrogels of natural and synthetic polymers.” 2013. Doctoral Dissertation, University of Wollongong. Accessed April 12, 2021. 030301 Chemical Characterisation of Materials ; https://ro.uow.edu.au/theses/4042.

MLA Handbook (7^th Edition):

De Silva, Dinayadura Awanthi. “Characterization of single network and interpenetrating network hydrogels of natural and synthetic polymers.” 2013. Web. 12 Apr 2021.

Vancouver:

De Silva DA. Characterization of single network and interpenetrating network hydrogels of natural and synthetic polymers. [Internet] [Doctoral dissertation]. University of Wollongong; 2013. [cited 2021 Apr 12]. Available from: 030301 Chemical Characterisation of Materials ; https://ro.uow.edu.au/theses/4042.

Council of Science Editors:

De Silva DA. Characterization of single network and interpenetrating network hydrogels of natural and synthetic polymers. [Doctoral Dissertation]. University of Wollongong; 2013. Available from: 030301 Chemical Characterisation of Materials ; https://ro.uow.edu.au/theses/4042

Delft University of Technology

2. Snouckaert van Schauburg, Philip (author). Mechanical and histological characterization of thrombi retrieved during thrombectomy for acute ischaemic stroke.

Degree: 2019, Delft University of Technology

URL: http://resolver.tudelft.nl/uuid:49729781-1eb5-424f-acf7-d627fd118cd5

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Background: The efficacy of a thrombectomy procedure for acute ischaemic stroke (AIS) is largely dependent on mechanical behaviour of thrombi and interactions with the thrombectomy… (more)

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Background: The efficacy of a thrombectomy procedure for acute ischaemic stroke (AIS) is largely dependent on mechanical behaviour of thrombi and interactions with the thrombectomy device. Studies have examined clot analogues and evidence suggests that thrombus mechanical properties largely depend on composition, yet evidence based on thrombi retrieved from AIS patients is still lacking. Therefore, this study aims to characterize the mechanical properties of thrombi retrieved from AIS patients and to determine the relation to thrombus composition. Additionally, results were compared to literature in order to assess clot analogue representativeness.Methods: Directly following a thrombectomy procedure, unconfined compression tests were performed on thrombi retrieved from acute ischaemic stroke patients. For all tested samples, the material properties were characterized and related to the histologically determined composition. Identified histological components were 1) Fibrin & platelets, 2) Red blood cell and 3) Leukocytes. A subgroup analysis was performed to compare values with literature, where samples were stratified into four groups based on fibrin & platelet content (F&P -low, -moderate low, -moderate high and -high). Results: A total of 18 patients yielded 39 samples which were successfully tested and histologically analysed. Sample stiffness was found to be positively correlated to fibrin & platelet content (Rs=0.69, p<0.001). A good histological distribution was present within the data, as the fibrin & platelet content ranged from 7% to 99%. Subgroup analysis showed little difference in mechanical behaviour between the F&P moderate-low and F&P moderate-high subgroups, with the F&P low and F&P high groups respectively exhibiting a decreased and increased stiffness. Comparing to current literature, the results demonstrated that analogues most accurately resemble thrombi with a low fibrin & platelet content. Furthermore, all samples displayed viscoelastic and non-linear stress-strain behaviour.Conclusion: It was found that composition is a strong influencing factor of thrombus mechanical properties. Both at high and low fibrin & platelet contents, the relation between composition and stiffness was strongest, while it was least pronounced at moderate fibrin & platelet contents (approximately 25%-75%).

BioMedical Engineering

Advisors/Committee Members: Gijsen, Frank (mentor), van der Helm, Frans (mentor), Dodou, Dimitra (graduation committee), Schwab, Arend (graduation committee), Delft University of Technology (degree granting institution).

Subjects/Keywords: Thrombi; Mechanical characterization; Histology

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APA (6^th Edition):

Snouckaert van Schauburg, P. (. (2019). Mechanical and histological characterization of thrombi retrieved during thrombectomy for acute ischaemic stroke. (Masters Thesis). Delft University of Technology. Retrieved from http://resolver.tudelft.nl/uuid:49729781-1eb5-424f-acf7-d627fd118cd5

Chicago Manual of Style (16^th Edition):

Snouckaert van Schauburg, Philip (author). “Mechanical and histological characterization of thrombi retrieved during thrombectomy for acute ischaemic stroke.” 2019. Masters Thesis, Delft University of Technology. Accessed April 12, 2021. http://resolver.tudelft.nl/uuid:49729781-1eb5-424f-acf7-d627fd118cd5.

MLA Handbook (7^th Edition):

Snouckaert van Schauburg, Philip (author). “Mechanical and histological characterization of thrombi retrieved during thrombectomy for acute ischaemic stroke.” 2019. Web. 12 Apr 2021.

Vancouver:

Snouckaert van Schauburg P(. Mechanical and histological characterization of thrombi retrieved during thrombectomy for acute ischaemic stroke. [Internet] [Masters thesis]. Delft University of Technology; 2019. [cited 2021 Apr 12]. Available from: http://resolver.tudelft.nl/uuid:49729781-1eb5-424f-acf7-d627fd118cd5.

Council of Science Editors:

Snouckaert van Schauburg P(. Mechanical and histological characterization of thrombi retrieved during thrombectomy for acute ischaemic stroke. [Masters Thesis]. Delft University of Technology; 2019. Available from: http://resolver.tudelft.nl/uuid:49729781-1eb5-424f-acf7-d627fd118cd5

Texas State University – San Marcos

3. Kannabiran Vasudevan, Dinesh Kumar. Mechanical and Fatigue Characterization of Carbon Fiber Reinforced Containing Rubber Micro particles and Silica Nano-Particles.

Degree: MS, Technology Management, 2016, Texas State University – San Marcos

URL: https://digital.library.txstate.edu/handle/10877/6862

► Composite materials play a vital role in a wide range of applications. Their adaptability to different situations and desirable properties attracted many industries. In the… (more)

▼ Composite materials play a vital role in a wide range of applications. Their adaptability to different situations and desirable properties attracted many industries. In the automotive industry the demand for lighter weight components is increasing day by day. Carbon-fiber reinforced epoxy composites are making inroads used in the automotive industry because of their superior properties such as high specific strength and stiffness, and chemical resistance. Since epoxy resins are brittle in nature, their toughness can be enhanced by reactive liquid rubbers and inorganic fillers. In this study carbon fiber reinforced composites were manufactured using epoxy resin modified by reactive liquid rubber particles carboxyl terminated butadiene acrylonitrile (CTBN) and nanosilica. Since fatigue failure of composite material is a complex phenomenon; the major aim of this study is to examine the effect of CTBN, nanosilica and hybrid (CTBN and nanosilica) under axial tension- tension fatigue performance. This research was first initiated by performing mechanical characterization (tensile and flexural) on neat, rubber and nanosilica modified resin specimens. Carbon fiber-reinforced nanomodified epoxy composite panels were manufactured by Vacuum Assisted Resin Transfer Molding (VARTM). To obtain a qualitative dispersion of rubber particles and nanoparticles in resin, centrifugal planetary mixer (THINKY™) was utilized in this research. Two different concentrations of rubber and nanoparticle particles were tested under tensile, flexural, and interlaminar shear loadings. Then the data was compared against a control (0 wt% of rubber particles and nanoparticles) composite. Based on mechanical characterization, one particular loading was selected for fatigue studies. Extensive axial tension-tension fatigue testing was performed on control, rubber modified, nano modified and hybrid composites. Advisors/Committee Members: Tate, Jintendra S. (advisor), Sriraman, Vedaraman (committee member), Kumar, Kunal (committee member).

Subjects/Keywords: Epoxy resin; CTBN; Nanoslica; Mechanical Characterization; Fatigue Characterization; VARTM

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APA (6^th Edition):

Kannabiran Vasudevan, D. K. (2016). Mechanical and Fatigue Characterization of Carbon Fiber Reinforced Containing Rubber Micro particles and Silica Nano-Particles. (Masters Thesis). Texas State University – San Marcos. Retrieved from https://digital.library.txstate.edu/handle/10877/6862

Chicago Manual of Style (16^th Edition):

Kannabiran Vasudevan, Dinesh Kumar. “Mechanical and Fatigue Characterization of Carbon Fiber Reinforced Containing Rubber Micro particles and Silica Nano-Particles.” 2016. Masters Thesis, Texas State University – San Marcos. Accessed April 12, 2021. https://digital.library.txstate.edu/handle/10877/6862.

MLA Handbook (7^th Edition):

Kannabiran Vasudevan, Dinesh Kumar. “Mechanical and Fatigue Characterization of Carbon Fiber Reinforced Containing Rubber Micro particles and Silica Nano-Particles.” 2016. Web. 12 Apr 2021.

Vancouver:

Kannabiran Vasudevan DK. Mechanical and Fatigue Characterization of Carbon Fiber Reinforced Containing Rubber Micro particles and Silica Nano-Particles. [Internet] [Masters thesis]. Texas State University – San Marcos; 2016. [cited 2021 Apr 12]. Available from: https://digital.library.txstate.edu/handle/10877/6862.

Council of Science Editors:

Kannabiran Vasudevan DK. Mechanical and Fatigue Characterization of Carbon Fiber Reinforced Containing Rubber Micro particles and Silica Nano-Particles. [Masters Thesis]. Texas State University – San Marcos; 2016. Available from: https://digital.library.txstate.edu/handle/10877/6862

Anna University

4. Arumugam, V. Defect characterization and failure load prediction of composite laminates using acoustic emission monitoring; -.

Degree: Mechanical Engineering, 2014, Anna University

URL: http://shodhganga.inflibnet.ac.in/handle/10603/25290

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Composite materials are among the strongest lightest and stiffest newlinecorrosionresistant materials known to man Damage in composite materials newlinecan be localized to one of the… (more)

Subjects/Keywords: acoustic emission monitoring; Defect characterization; mechanical engineering

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APA (6^th Edition):

Arumugam, V. (2014). Defect characterization and failure load prediction of composite laminates using acoustic emission monitoring; -. (Thesis). Anna University. Retrieved from http://shodhganga.inflibnet.ac.in/handle/10603/25290

Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation

Chicago Manual of Style (16^th Edition):

Arumugam, V. “Defect characterization and failure load prediction of composite laminates using acoustic emission monitoring; -.” 2014. Thesis, Anna University. Accessed April 12, 2021. http://shodhganga.inflibnet.ac.in/handle/10603/25290.

Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation

MLA Handbook (7^th Edition):

Arumugam, V. “Defect characterization and failure load prediction of composite laminates using acoustic emission monitoring; -.” 2014. Web. 12 Apr 2021.

Vancouver:

Arumugam V. Defect characterization and failure load prediction of composite laminates using acoustic emission monitoring; -. [Internet] [Thesis]. Anna University; 2014. [cited 2021 Apr 12]. Available from: http://shodhganga.inflibnet.ac.in/handle/10603/25290.

Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation

Council of Science Editors:

Arumugam V. Defect characterization and failure load prediction of composite laminates using acoustic emission monitoring; -. [Thesis]. Anna University; 2014. Available from: http://shodhganga.inflibnet.ac.in/handle/10603/25290

Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation

Princeton University

5. Bhadra, Shoham. Methods for Characterization of Batteries Using Acoustic Interrogation .

Degree: PhD, 2015, Princeton University

URL: http://arks.princeton.edu/ark:/88435/dsp01s7526f810

► Batteries are a ubiquitous form of electrochemical energy storage, but thus far the methods for measuring the mechanical properties of batteries and their component materials… (more)

▼ Batteries are a ubiquitous form of electrochemical energy storage, but thus far the methods for measuring the mechanical properties of batteries and their component materials in operando have lagged far behind the methods for measuring the corresponding electrical properties. In this thesis, I demonstrate methods for determining the changes in materials properties of an electrochemical energy storage cell both ex situ and in operando. I begin by establishing the impact of micro-scale morphology changes on the macro-scale dynamic mechanical response in commercial alkaline AA cells. Using a bounce test, the coefficient of restitution (COR) of the cell is shown to increase non-linearly as a function of state of charge (SOC). I show that the reason for the increase in the COR stems from the spatially-dependent oxidation of the Zn anode, with an initial increase corresponding to the formation of a percolation pathway of ZnO-clad Zn particles spanning the radius of the anode. The subsequent saturation of the COR is shown to result from the ultimate solidication and desiccation of the Zn anode. Building from this, I present a generalized in operando solution for materials characterization in batteries using ultrasonic interrogation. The materials properties of battery components change during charge and discharge, resulting in a change in the sound speed of the materials. By attaching transducers to a battery during cycling and sending ultrasonic pulses through each cell I observe the changes in the time of flight (ToF) of the pulses, both in reflection and transmission. I show that the changes in ToF correspond to both SOC and state of health (SOH) in a variety of battery chemistries and geometries, and detail a corresponding acoustic conservation law model framework. Finally, I perform these electrochemical acoustic time of flight (EAToF) experiments on commercial alkaline AA cells. By correlating the results with energy dispersive x-ray diffraction (EDXRD) data and previous bounce test data, I show that EAToF is capable of determining the morphology changes in the anode due to oxidation and solidication during discharge. I also show that using EAToF, the materials quality differences between multiple AA battery brands can be determined. Advisors/Committee Members: Steingart, Daniel A (advisor).

Subjects/Keywords: Batteries; Mechanical characterization; Nondestructive testing; Ultrasound

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APA (6^th Edition):

Bhadra, S. (2015). Methods for Characterization of Batteries Using Acoustic Interrogation . (Doctoral Dissertation). Princeton University. Retrieved from http://arks.princeton.edu/ark:/88435/dsp01s7526f810

Chicago Manual of Style (16^th Edition):

Bhadra, Shoham. “Methods for Characterization of Batteries Using Acoustic Interrogation .” 2015. Doctoral Dissertation, Princeton University. Accessed April 12, 2021. http://arks.princeton.edu/ark:/88435/dsp01s7526f810.

MLA Handbook (7^th Edition):

Bhadra, Shoham. “Methods for Characterization of Batteries Using Acoustic Interrogation .” 2015. Web. 12 Apr 2021.

Vancouver:

Bhadra S. Methods for Characterization of Batteries Using Acoustic Interrogation . [Internet] [Doctoral dissertation]. Princeton University; 2015. [cited 2021 Apr 12]. Available from: http://arks.princeton.edu/ark:/88435/dsp01s7526f810.

Council of Science Editors:

Bhadra S. Methods for Characterization of Batteries Using Acoustic Interrogation . [Doctoral Dissertation]. Princeton University; 2015. Available from: http://arks.princeton.edu/ark:/88435/dsp01s7526f810

Colorado School of Mines

6. Caire, Benjamin R. Mechanical characterization of anion exchange membranes under controlled environmental conditions.

Degree: PhD, Chemical and Biological Engineering, 2015, Colorado School of Mines

URL: http://hdl.handle.net/11124/20140

► While proton exchange membrane (PEM) fuel cells have been the focus of development in the past, anion exchange membranes (AEM) have the potential to dramatically… (more)

▼ While proton exchange membrane (PEM) fuel cells have been the focus of development in the past, anion exchange membranes (AEM) have the potential to dramatically lower the cost of fuel cells by utilizing non-noble catalysts and a variety of fuel sources. Although chemical degradation typically dominates membrane failure pathways in a fuel cell, mechanical breakdown due to humidity cycling is a common occurrence. This thesis aims to understand the mechanical properties of anion exchange membranes under fuel cell operating conditions. A humidity delivery system was developed for the TA Instruments ARES-G2 rheometer to allow for testing at a range of temperatures (30-100°C) and relative humidity conditions (0-95% RH). A modified Sentmanat Extensional Rheometer (SER) was used to perform tensile-like testing using less than 5% of material needed for a traditional tensile tester. These tools established metrics for a robust membrane through mechanical characterization across temperatures and humidities. A pentablock AEM with a balance of stiff and elastic blocks was shown to have adequate conductivity (up to 60 mS/cm at 90°C and 95%RH), low water uptake (<25%), and good mechanical integrity under dry and hydrated conditions, showing potential for being durable under hydration and mechanical stresses. Complementing the destructive tensile testing, a “water stress” test was explored to measure the tension and durability under hygral cycles. Membranes with a low (<5 MPa) and near constant water stress absorb and desorb water reversibly. The materials that performed poorly in the water stress tests also had elongation <50% under dry conditions and swelled with water. Membranes performing well in the water stress test also had an elongation to break 10 times that of its in-plane water swelling (in liquid water). Ion exchange membranes need to be able to mechanically stretch in the elastic region well above the in-plane swelling with water to withstand hygral stresses in an electrochemical device. By identifying a relationship between the mechanical and hygral stretching to predict durability in a working device, this thesis advanced the understanding of mechanical performance under relevant temperature and humidity conditions, which is critical to the development of durable anion exchange membranes. Advisors/Committee Members: Liberatore, Matthew W. (advisor), Herring, Andrew M. (committee member), Wolden, Colin Andrew (committee member), Dorgan, John R. (committee member), Packard, Corinne E. (committee member).

Subjects/Keywords: mechanical characterization; relative humidity; polymer; environmental control

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APA (6^th Edition):

Caire, B. R. (2015). Mechanical characterization of anion exchange membranes under controlled environmental conditions. (Doctoral Dissertation). Colorado School of Mines. Retrieved from http://hdl.handle.net/11124/20140

Chicago Manual of Style (16^th Edition):

Caire, Benjamin R. “Mechanical characterization of anion exchange membranes under controlled environmental conditions.” 2015. Doctoral Dissertation, Colorado School of Mines. Accessed April 12, 2021. http://hdl.handle.net/11124/20140.

MLA Handbook (7^th Edition):

Caire, Benjamin R. “Mechanical characterization of anion exchange membranes under controlled environmental conditions.” 2015. Web. 12 Apr 2021.

Vancouver:

Caire BR. Mechanical characterization of anion exchange membranes under controlled environmental conditions. [Internet] [Doctoral dissertation]. Colorado School of Mines; 2015. [cited 2021 Apr 12]. Available from: http://hdl.handle.net/11124/20140.

Council of Science Editors:

Caire BR. Mechanical characterization of anion exchange membranes under controlled environmental conditions. [Doctoral Dissertation]. Colorado School of Mines; 2015. Available from: http://hdl.handle.net/11124/20140

Virginia Tech

7. Huntington, Alyssa Joan. Anisotropy of Passive and Active Rat Vagina under Biaxial Loading.

Degree: MS, Engineering Mechanics, 2018, Virginia Tech

URL: http://hdl.handle.net/10919/95910

► Pelvic organ prolapse, the decent of the pelvic organs from their normal anatomical position, is a common condition among women that is associated with mechanical… (more)

Subjects/Keywords: vagina; biaxial mechanical characterization; contractile force

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APA (6^th Edition):

Huntington, A. J. (2018). Anisotropy of Passive and Active Rat Vagina under Biaxial Loading. (Masters Thesis). Virginia Tech. Retrieved from http://hdl.handle.net/10919/95910

Chicago Manual of Style (16^th Edition):

Huntington, Alyssa Joan. “Anisotropy of Passive and Active Rat Vagina under Biaxial Loading.” 2018. Masters Thesis, Virginia Tech. Accessed April 12, 2021. http://hdl.handle.net/10919/95910.

MLA Handbook (7^th Edition):

Huntington, Alyssa Joan. “Anisotropy of Passive and Active Rat Vagina under Biaxial Loading.” 2018. Web. 12 Apr 2021.

Vancouver:

Huntington AJ. Anisotropy of Passive and Active Rat Vagina under Biaxial Loading. [Internet] [Masters thesis]. Virginia Tech; 2018. [cited 2021 Apr 12]. Available from: http://hdl.handle.net/10919/95910.

Council of Science Editors:

Huntington AJ. Anisotropy of Passive and Active Rat Vagina under Biaxial Loading. [Masters Thesis]. Virginia Tech; 2018. Available from: http://hdl.handle.net/10919/95910

Colorado State University

8. Ramo, Nicole Lauren. Spinal cord and meningeal mechanics: viscoelastic characterization and computational modeling.

Degree: PhD, Bioengineering, 2018, Colorado State University

URL: http://hdl.handle.net/10217/193093

► Suffering a spinal cord injury (SCI) can be physically, emotionally, and financially devastating. With the complex loading environment typically seen in SCI events, finite element… (more)

▼ Suffering a spinal cord injury (SCI) can be physically, emotionally, and financially devastating. With the complex loading environment typically seen in SCI events, finite element (FE) computational models provide an important economical and ethical option for investigating the mechanical etiology of SCI, evaluating prevention techniques, and assessing clinical treatments. To this end, numerous research groups have developed FE models of the spinal cord using various degrees of material and structural sophistication. However, the level of model complexity that is necessary to achieve accurate predictions of SCI has not been explicitly investigated as few studies have reported applicable tissue behavior. What are reported in the literature as "spinal cord mechanical properties" are most commonly based on ex-vivo tests of the spinal-cord-pia-arachnoid construct (SCPC). The pia and arachnoid maters are fibrous meningeal tissues that closely envelope the spinal cord, and together are referred to as the pia-arachnoid-complex (PAC). Currently available data demonstrate the PAC's importance in the overall SCPC stiffness and shape restoration following compression. However, only one previous study has reported mechanical properties of isolated spinal PAC, and therefore, conclusions about its contribution to SCPC mechanics are largely unknown. Additionally, it has been shown that SCPC material properties begin to degrade within 90 minutes of death. Considering the experimental difficulties and ethical concerns associated with in-vivo mechanical testing of the SCPC, determining the relationship between in-vivo and ex-vivo viscoelastic properties would allow researchers to more accurately analyze existing ex-vivo data. Therefore, the overarching goal of this work is to address the current gaps in knowledge regarding spinal cord and meningeal tissue mechanics and incorporate the developed material models into a FE model. Comparisons of ex-vivo and in-vivo porcine SCPC non-linear viscoelastic behavior revealed significantly different acute behaviors where the ex-vivo condition exhibited a higher stress response but also relaxed quicker and to a greater extent than the in-vivo condition. Although it only made up less than 6% of the ovine SCPC volume, the PAC was found to significantly affect the non-linear viscoelastic behavior of the SCPC which supports the conclusion that it plays an important protective mechanical role. Examining the fitting and predictive accuracy of linear, quasi-linear, and non-linear viscoelastic formulations to SCPC, cord, and PAC stress-strain data, non-linear formulations are recommended to model the SCPC and cord response to arbitrary loading conditions while the QLV is recommended for the PAC. This work provides researchers with novel insights into the complex mechanical behavior of the spinal cord and PAC. The experimental results represent an important addition to the limited literature on in-vivo versus ex-vivo neural tissue viscoelastic properties; they are also the first to quantify the non-linear… Advisors/Committee Members: Puttlitz, Christian M. (advisor), Troyer, Kevin L. (advisor), Heyliger, Paul (committee member), James, Susan (committee member).

Subjects/Keywords: pia mater; viscoelasticity; spinal cord; mechanical characterization

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APA (6^th Edition):

Ramo, N. L. (2018). Spinal cord and meningeal mechanics: viscoelastic characterization and computational modeling. (Doctoral Dissertation). Colorado State University. Retrieved from http://hdl.handle.net/10217/193093

Chicago Manual of Style (16^th Edition):

Ramo, Nicole Lauren. “Spinal cord and meningeal mechanics: viscoelastic characterization and computational modeling.” 2018. Doctoral Dissertation, Colorado State University. Accessed April 12, 2021. http://hdl.handle.net/10217/193093.

MLA Handbook (7^th Edition):

Ramo, Nicole Lauren. “Spinal cord and meningeal mechanics: viscoelastic characterization and computational modeling.” 2018. Web. 12 Apr 2021.

Vancouver:

Ramo NL. Spinal cord and meningeal mechanics: viscoelastic characterization and computational modeling. [Internet] [Doctoral dissertation]. Colorado State University; 2018. [cited 2021 Apr 12]. Available from: http://hdl.handle.net/10217/193093.

Council of Science Editors:

Ramo NL. Spinal cord and meningeal mechanics: viscoelastic characterization and computational modeling. [Doctoral Dissertation]. Colorado State University; 2018. Available from: http://hdl.handle.net/10217/193093

University of South Carolina

9. Shapovalov, Kirill. Mechanical Characterization of SICF-SICM Nuclear Fuel Cladding by a Novel Hydraulic Internal Pressurization Method.

Degree: MS, Mechanical Engineering, 2016, University of South Carolina

URL: https://scholarcommons.sc.edu/etd/3567

► Ceramic Matrix Composites (CMC) have been actively researched for applications requiring high temperature strength and damage tolerance. Examples are turbine engine hot section components,… (more)

▼ Ceramic Matrix Composites (CMC) have been actively researched for applications requiring high temperature strength and damage tolerance. Examples are turbine engine hot section components, leading edges for hypersonic vehicles, nuclear fusion reactor first wall and blanket, and recently nuclear fuel claddings. Predictable material damage behavior is desirable for these applications so early damage accumulation can be detected before a catastrophic failure occurs. Many ceramic materials can withstand high temperature environments, but due to inherent brittleness of ceramics the high damage tolerance and the predictable damage behavior are difficult to achieve. Ceramic fiber reinforced ceramic composites (CFCC) have demonstrated the above properties through properly designed fiber architecture, carefully engineered fiber-matrix interphase layer, and the advanced manufacturing processes. Because of the number of unknowns associated with the design and manufacturing of CFCCs, mechanical experiments are relied upon to obtain necessary material property data sets for component and system design analysis. This work focuses on: (1) development and validation of novel mechanical characterization techniques for tubular samples; and (2) characterization of a nuclear grade silicon carbide fiber reinforced silicon carbide matrix (SiCf-SiCm) composite nuclear fuel cladding. A bladder type internal pressure fixture was designed to load the composite cladding tubes to failure in two configurations: tubular sample with both ends open and tubular sample with one closed-end. The test methods were first validated by testing tubular surrogate samples made out of well-known materials, and comparing the test results with finite element (FE) simulation and analytical calculations. The pressure profile measured by Digital Image Correlation (DIC) along sample axis is in good correlation with previously reported analytical solution. Away from the edge, the measured strains were found to be within 3% of calculated values at loading levels of interest. A closed-end validation experiments showed that the novel bladder method can generate a hydrostatic pressure state which closely imitates the operating conditions for nuclear fuel claddings. Using the above methods, nuclear grade SiCf-SiCm composite tubes had been tested in both configurations to obtain critical stress and strain values at proportional limit and at failure. One group of samples, with only 1.25 mm wall thickness, was able to sustain internal pressures averaging at 99.8 MPa before the final rupture. These samples also demonstrated pronounced progressive damage behavior starting around 33.2 MPa. At the rupture pressure, all samples showed graceful failure modes without excess fragmentation. The surface strain maps measured by DIC revealed highly heterogeneous strain state during loading; the spatial frequency of the strain patterns correlate to the fiber tow braiding architecture. At final failure, the local peak strain was found to range between 115% and 185% of the… Advisors/Committee Members: Xinyu Huang.

Subjects/Keywords: Engineering; Mechanical Engineering; Mechanical Characterization; Nuclear Fuel Cladding; Hydraulic; Pressurization

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APA (6^th Edition):

Shapovalov, K. (2016). Mechanical Characterization of SICF-SICM Nuclear Fuel Cladding by a Novel Hydraulic Internal Pressurization Method. (Masters Thesis). University of South Carolina. Retrieved from https://scholarcommons.sc.edu/etd/3567

Chicago Manual of Style (16^th Edition):

Shapovalov, Kirill. “Mechanical Characterization of SICF-SICM Nuclear Fuel Cladding by a Novel Hydraulic Internal Pressurization Method.” 2016. Masters Thesis, University of South Carolina. Accessed April 12, 2021. https://scholarcommons.sc.edu/etd/3567.

MLA Handbook (7^th Edition):

Shapovalov, Kirill. “Mechanical Characterization of SICF-SICM Nuclear Fuel Cladding by a Novel Hydraulic Internal Pressurization Method.” 2016. Web. 12 Apr 2021.

Vancouver:

Shapovalov K. Mechanical Characterization of SICF-SICM Nuclear Fuel Cladding by a Novel Hydraulic Internal Pressurization Method. [Internet] [Masters thesis]. University of South Carolina; 2016. [cited 2021 Apr 12]. Available from: https://scholarcommons.sc.edu/etd/3567.

Council of Science Editors:

Shapovalov K. Mechanical Characterization of SICF-SICM Nuclear Fuel Cladding by a Novel Hydraulic Internal Pressurization Method. [Masters Thesis]. University of South Carolina; 2016. Available from: https://scholarcommons.sc.edu/etd/3567

10. Silva, Ana Paula Santos da [UNESP]. Análise da influência da adição de nanopartículas de ZnO nas propriedades físico-mecânicas e de transferência de calor em painéis de fibras de madeira.

Degree: 2018, Universidade Estadual Paulista (UNESP)

URL: http://hdl.handle.net/11449/153525

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Coordenação de Aperfeiçoamento de Pessoal de Nível Superior (CAPES)

O segmento de painéis à base de madeira tem se destacado no setor madeireiro pelo uso de tecnologia moderna em seus equipamentos e uso mais racional da matéria-prima. No entanto, a busca por produtos melhores e mais competitivos é constante tendo em vista o mercado ser bastante exigente. Sendo assim, definiu-se como objetivo deste estudo a adição de nanopartículas de óxido de zinco (ZnO) na fabricação de painéis de fibras de média densidade e avaliar as influências das mesmas nas propriedades físicas e mecânicas dos painéis produzidos com dois adesivos comerciais e ainda verificar a influência das nanopartículas na transferência de calor durante o processo de prensagem. Os painéis foram produzidos com adição de 0,5% e 1% de nanopartículas com base no peso seco de fibras e painéis testemunha com resina ureia-formaldeído (UF) e melamina-formaldeído (MF) e, os mesmos caracterizados a partir da ABNT NBR 15.316-2:2015. Durante o processo de prensagem através de sistema de aquisição de dados acoplado a um termopar foram obtidas as variações de temperatura do colchão ao longo dos dez minutos do ciclo de prensagem. A partir dos resultados pode-se concluir que o uso das nanopartículas na proporção de 0,5% de nanopartículas não indicou grandes interferências nas propriedades físico-mecânicas dos painéis estudados. A adição de 1% de nanopartículas tanto nos tratamentos com MF e UF interferiu de forma negativa na interação com o adesivo e, assim, reduziu as propriedades físicas e mecânicas dos painéis e, auxiliou a transferência de calor a partir do segundo ciclo de prensagem.

The wood-based panels stood out in the wood segment by the use of modern technology in their equipment and more rational use of the raw material. However, the demand for better and more competitive products is constant, given that the market is quite demanding. Thus, the aim of this study was to add zinc oxide (ZnO) nanoparticles in the production of medium density fiberboards and to evaluate their influence on the physical and mechanical properties of the panels produced with two commercial adhesives and to verify the influence of nanoparticles on the heat transfer during the pressing process. The panels were produced with 0.5% and 1% of nanoparticles based on the dry weight of fibers and control panels with ureaformaldehyde (UF) and…

Advisors/Committee Members: Universidade Estadual Paulista (UNESP), Campos, Cristiane Inácio de [UNESP], Favarim, Higor Rogério.

Subjects/Keywords: MDF; Eucalipto; Caracterização física; Caracterização mecânica; Painéis de madeira; Nanotecnologia; Eucalyptus; Physical characterization; Mechanical characterization

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APA · Chicago · MLA · Vancouver · CSE | Export to Zotero / EndNote / Reference Manager

APA (6^th Edition):

Silva, A. P. S. d. [. (2018). Análise da influência da adição de nanopartículas de ZnO nas propriedades físico-mecânicas e de transferência de calor em painéis de fibras de madeira. (Masters Thesis). Universidade Estadual Paulista (UNESP). Retrieved from http://hdl.handle.net/11449/153525

Chicago Manual of Style (16^th Edition):

Silva, Ana Paula Santos da [UNESP]. “Análise da influência da adição de nanopartículas de ZnO nas propriedades físico-mecânicas e de transferência de calor em painéis de fibras de madeira.” 2018. Masters Thesis, Universidade Estadual Paulista (UNESP). Accessed April 12, 2021. http://hdl.handle.net/11449/153525.

MLA Handbook (7^th Edition):

Silva, Ana Paula Santos da [UNESP]. “Análise da influência da adição de nanopartículas de ZnO nas propriedades físico-mecânicas e de transferência de calor em painéis de fibras de madeira.” 2018. Web. 12 Apr 2021.

Vancouver:

Silva APSd[. Análise da influência da adição de nanopartículas de ZnO nas propriedades físico-mecânicas e de transferência de calor em painéis de fibras de madeira. [Internet] [Masters thesis]. Universidade Estadual Paulista (UNESP); 2018. [cited 2021 Apr 12]. Available from: http://hdl.handle.net/11449/153525.

Council of Science Editors:

Silva APSd[. Análise da influência da adição de nanopartículas de ZnO nas propriedades físico-mecânicas e de transferência de calor em painéis de fibras de madeira. [Masters Thesis]. Universidade Estadual Paulista (UNESP); 2018. Available from: http://hdl.handle.net/11449/153525

Washington State University

11. [No author]. Fabrication and characterization of carbon nanotube turfs .

Degree: 2013, Washington State University

URL: http://hdl.handle.net/2376/4732

► Carbon nanotube turfs are vertically aligned, slightly tortuous and entangled functional nanomaterials that exhibit high thermal and electrical properties. CNT turfs exhibit unique combinations of… (more)

▼ Carbon nanotube turfs are vertically aligned, slightly tortuous and entangled functional nanomaterials that exhibit high thermal and electrical properties. CNT turfs exhibit unique combinations of thermal and electrical conductivity, energy absorbing capability, low density and adhesive behavior. The objective of this study is to fabricate, measure, manipulate and characterize CNT turfs and thus determine the relationship between a turf's properties and its morphology, and provide guidance for developing links between turf growth conditions and of the subsequent turf properties. Nanoindentation was utilized to determine the mechanical and in situ electrical properties of CNT turfs. Elastic properties do not vary significantly laterally within a single turf , quantifying for the first time the ability to treat the turf as a mechanical continuum throughout. The use of the average mechanical properties for any given turf should be suitable for design purpose without the necessity of accounting for lateral spatial variation in structure. Properties variation based on time dependency, rate dependency, adhesive behavior and energy absorption and dissipation behavior have been investigated for these CNT turfs. Electrical properties measurements of CNT turfs have been carried out and show that a constant electrical current at a constant penetration depth indicates that a constant number of CNTs in contact with the tip; combining with the results that adhesive load increased with an increasing penetration hold time, thus we conclude that during a hold period of nanoindentation, individual tubes increase their individual attachment to the tip. CNT turfs show decreased adhesion and modulus after exposure to an electron beam due to carbon deposition and subsequent oxidation. To increase the modulus of the turf, axial compression and solvent capillary were used to increase the density of the turf by up to 15 times. Structure-property relationships were determined from the density and tortuosity measurements carried out through in situ electrical measurements and directionality measurements. Increasing density increases the mechanical properties as well as electrical conductivity. The modulus increased with a lower tortuosity, which may be related to the compressive buckling positioning. Advisors/Committee Members: Bahr, David F (advisor).

Subjects/Keywords: Materials Science; Mechanical engineering; Carbon nantubes; characterization; electrical properties; fabrication; mechanical properties; structure

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APA (6^th Edition):

author], [. (2013). Fabrication and characterization of carbon nanotube turfs . (Thesis). Washington State University. Retrieved from http://hdl.handle.net/2376/4732

Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation

Chicago Manual of Style (16^th Edition):

author], [No. “Fabrication and characterization of carbon nanotube turfs .” 2013. Thesis, Washington State University. Accessed April 12, 2021. http://hdl.handle.net/2376/4732.

Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation

MLA Handbook (7^th Edition):

author], [No. “Fabrication and characterization of carbon nanotube turfs .” 2013. Web. 12 Apr 2021.

Vancouver:

author] [. Fabrication and characterization of carbon nanotube turfs . [Internet] [Thesis]. Washington State University; 2013. [cited 2021 Apr 12]. Available from: http://hdl.handle.net/2376/4732.

Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation

Council of Science Editors:

author] [. Fabrication and characterization of carbon nanotube turfs . [Thesis]. Washington State University; 2013. Available from: http://hdl.handle.net/2376/4732

Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation

University of California – Irvine

12. Bower, Hannah Erin. Optimization of Dual Laser Induced Fluorescence (DPLIF) Instrumentation for Characterization of Liquid Mixing in Sprays.

Degree: Mechanical and Aerospace Engineering, 2016, University of California – Irvine

URL: http://www.escholarship.org/uc/item/8w9758pf

► In this effort, a novel Dual Planar Laser Induced Fluorescence (DPLIF) diagnostic is developed and optimized for characterizing the liquid-liquid interactions in rocket injector sprays.… (more)

Subjects/Keywords: Mechanical engineering; Aerospace engineering; characterization; injector; laser; sprays

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APA (6^th Edition):

Bower, H. E. (2016). Optimization of Dual Laser Induced Fluorescence (DPLIF) Instrumentation for Characterization of Liquid Mixing in Sprays. (Thesis). University of California – Irvine. Retrieved from http://www.escholarship.org/uc/item/8w9758pf

Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation

Chicago Manual of Style (16^th Edition):

Bower, Hannah Erin. “Optimization of Dual Laser Induced Fluorescence (DPLIF) Instrumentation for Characterization of Liquid Mixing in Sprays.” 2016. Thesis, University of California – Irvine. Accessed April 12, 2021. http://www.escholarship.org/uc/item/8w9758pf.

Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation

MLA Handbook (7^th Edition):

Bower, Hannah Erin. “Optimization of Dual Laser Induced Fluorescence (DPLIF) Instrumentation for Characterization of Liquid Mixing in Sprays.” 2016. Web. 12 Apr 2021.

Vancouver:

Bower HE. Optimization of Dual Laser Induced Fluorescence (DPLIF) Instrumentation for Characterization of Liquid Mixing in Sprays. [Internet] [Thesis]. University of California – Irvine; 2016. [cited 2021 Apr 12]. Available from: http://www.escholarship.org/uc/item/8w9758pf.

Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation

Council of Science Editors:

Bower HE. Optimization of Dual Laser Induced Fluorescence (DPLIF) Instrumentation for Characterization of Liquid Mixing in Sprays. [Thesis]. University of California – Irvine; 2016. Available from: http://www.escholarship.org/uc/item/8w9758pf

Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation

Temple University

13. Honarvar, Mohammad. THERMOMECHANICAL CHARACTERIZATION OF ONE-WAY SHAPE MEMORY NITINOL AS AN ACTUATOR FOR ACTIVE SURGICAL NEEDLE.

Degree: PhD, 2014, Temple University

URL: http://digital.library.temple.edu/u?/p245801coll10,301891

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Mechanical Engineering

Needle-based intervention insertion is one of the common surgical techniques used in many diagnostic and therapeutic percutaneous procedures. The success of such procedures… (more)

▼

Mechanical Engineering

Needle-based intervention insertion is one of the common surgical techniques used in many diagnostic and therapeutic percutaneous procedures. The success of such procedures highly depends on the accuracy of needle placement at target locations. An active needle has the potential to enhance the accuracy of needle placement as well as to improve clinical outcome. Bending forces provided by the attached actuators can assist the maneuverability in order to reach the targets following a desired trajectory. There are three major research parts in the development of active needle project in the Composites Laboratory of Temple University. They are thermomechanical characterization of shape memory alloy (SMA) or Nitinol as an actuator for smart needle, mechanical modeling and design of smart needles, and study of tissue needle interaction. The characterization of SMA is the focus of this dissertation. Unique thermomechanical properties of Nitinol known as shape memory effect and superelasticity make it applicable for different fields such as biomedical, structural and aerospace engineering. These unique behaviors are due to the comparatively large amount of recoverable strain which is being produced in a martensitic phase transformation. However, under certain ranges of stresses and temperatures, Nitinol wires exhibit unrecovered strain (also known as residual strain); which limits their applicability. Therefore, for applications that rely on the strain response in repetitive loading and unloading cycles, it is important to understand the generation of the unrecovered strain in the Nitinol wires. In this study, the unrecovered strain of Nitinol wires with various diameters was investigated, using two experimental approaches: constant stress and uniaxial tensile tests. Moreover, a critical range of stress was found beyond which the unrecovered strain was negligible at temperatures of 70 to 80C depending on the wire diameter. Wire diameters varied from 0.10 to 0.29 mm were tested and different ranges of critical stress were found for different wire diameters. The transformation temperatures of different wire diameters at zero stress have been achieved by performing the Differential Scanning Calorimetry (DSC) test. The actuation force created by Nitinol wire is measured through constant strain experiment. X-Ray Diffraction (XRD) study was also performed to investigate the phase of Nitinol wires under various thermomechanical loading conditions. In summary, the effect of wire diameter on the required critical stresses to avoid the unrecovered strain between first and second cycle of heating and cooling are presented and the results of both mechanical tests are justified by the results obtained from the XRD study.

Temple University – Theses

Advisors/Committee Members: Hutapea, Parsaoran;, Neretina, Svetlana, Ren, Fei, Podder, Tarun K.;.

Subjects/Keywords: Materials Science; Mechanical engineering;

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APA (6^th Edition):

Honarvar, M. (2014). THERMOMECHANICAL CHARACTERIZATION OF ONE-WAY SHAPE MEMORY NITINOL AS AN ACTUATOR FOR ACTIVE SURGICAL NEEDLE. (Doctoral Dissertation). Temple University. Retrieved from http://digital.library.temple.edu/u?/p245801coll10,301891

Chicago Manual of Style (16^th Edition):

Honarvar, Mohammad. “THERMOMECHANICAL CHARACTERIZATION OF ONE-WAY SHAPE MEMORY NITINOL AS AN ACTUATOR FOR ACTIVE SURGICAL NEEDLE.” 2014. Doctoral Dissertation, Temple University. Accessed April 12, 2021. http://digital.library.temple.edu/u?/p245801coll10,301891.

MLA Handbook (7^th Edition):

Honarvar, Mohammad. “THERMOMECHANICAL CHARACTERIZATION OF ONE-WAY SHAPE MEMORY NITINOL AS AN ACTUATOR FOR ACTIVE SURGICAL NEEDLE.” 2014. Web. 12 Apr 2021.

Vancouver:

Honarvar M. THERMOMECHANICAL CHARACTERIZATION OF ONE-WAY SHAPE MEMORY NITINOL AS AN ACTUATOR FOR ACTIVE SURGICAL NEEDLE. [Internet] [Doctoral dissertation]. Temple University; 2014. [cited 2021 Apr 12]. Available from: http://digital.library.temple.edu/u?/p245801coll10,301891.

Council of Science Editors:

Honarvar M. THERMOMECHANICAL CHARACTERIZATION OF ONE-WAY SHAPE MEMORY NITINOL AS AN ACTUATOR FOR ACTIVE SURGICAL NEEDLE. [Doctoral Dissertation]. Temple University; 2014. Available from: http://digital.library.temple.edu/u?/p245801coll10,301891

University of Waterloo

14. Langelier, Brian. Effects of Ca and Ce on the Microstructure and Mechanical Properties of Mg-Zn Alloys.

Degree: 2013, University of Waterloo

URL: http://hdl.handle.net/10012/7701

► The effects of Ca and Ce on the precipitation behaviour and microstructural characteristics of Mg-Zn based alloys are investigated by comprehensive multi-scale characterization and analysis.… (more)

▼ The effects of Ca and Ce on the precipitation behaviour and microstructural characteristics of Mg-Zn based alloys are investigated by comprehensive multi-scale characterization and analysis. The elements Ca and Ce are chosen for their potential to enhance (a) precipitation hardening and (b) alloy texture and ductility, and are examined at both alloying and microalloying (< 0.5 wt%) levels. When added individually to Mg-Zn, Ca is found to enhance precipitation, but Ce produces a generally adverse effect on the hardening response. A pre-ageing strategy is proposed to alleviate this negative effect of Ce. The highlight of this work is the double microalloying addition of Ce-Ca to Mg-Zn, as this combination and quantity proves to be the most effective at increasing the age-hardening response, and enhancing microstructural characteristics for improved ductility. Transmission electron microscopy analysis reveals the hardening increase to originate from a refined precipitate microstructure, and the formation of fine-scale basal plate precipitates. These fine precipitates form during early ageing as monolayer GP zones consisting of Ca and Zn. The formation of these GP zones is facilitated by the atomic size difference between those two solutes, and their observed tendency to co-cluster. The monolayer GP zones evolve to multi-layered forms in the peak-aged condition. These precipitates are observed to be uniformly distributed, even where apparent precipitate-free zones are observed for the Mg-Zn type phases in the grain boundary regions. Notably, the size of these precipitate-free zones for the Mg-Zn phases is also reduced in the Ce-Ca microalloyed samples, compared to the binary alloy. The Ce-Ca microalloying additions also promote grain refinement and a weakening of the basal textures, typical of conventional Mg-based alloys, compared to both Mg-Zn and Mg-Zn-Ce. As a result, the tensile behaviour of the alloys with Ce-Ca is similarly enhanced. Considering both the precipitation hardening capability and microstructural characteristics, it is concluded that the double microalloying additions of Ce-Ca can be considered as a new alloy design strategy to successfully achieve improvement in both the strength and ductility of Mg-Zn alloys.

Subjects/Keywords: Magnesium alloys; Precipitation; Microstructure characterization; Microalloying; Mechanical properties; Phase transformations

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APA (6^th Edition):

Langelier, B. (2013). Effects of Ca and Ce on the Microstructure and Mechanical Properties of Mg-Zn Alloys. (Thesis). University of Waterloo. Retrieved from http://hdl.handle.net/10012/7701

Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation

Chicago Manual of Style (16^th Edition):

Langelier, Brian. “Effects of Ca and Ce on the Microstructure and Mechanical Properties of Mg-Zn Alloys.” 2013. Thesis, University of Waterloo. Accessed April 12, 2021. http://hdl.handle.net/10012/7701.

Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation

MLA Handbook (7^th Edition):

Langelier, Brian. “Effects of Ca and Ce on the Microstructure and Mechanical Properties of Mg-Zn Alloys.” 2013. Web. 12 Apr 2021.

Vancouver:

Langelier B. Effects of Ca and Ce on the Microstructure and Mechanical Properties of Mg-Zn Alloys. [Internet] [Thesis]. University of Waterloo; 2013. [cited 2021 Apr 12]. Available from: http://hdl.handle.net/10012/7701.

Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation

Council of Science Editors:

Langelier B. Effects of Ca and Ce on the Microstructure and Mechanical Properties of Mg-Zn Alloys. [Thesis]. University of Waterloo; 2013. Available from: http://hdl.handle.net/10012/7701

Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation

Purdue University

15. Paranjothy, Sai Sudharsanan. Experimental Characterization Of Cu Free-Air Ball And Simulations Of Dielectric Fracture During Wire Bonding.

Degree: MS, Mechanical Engineering, 2014, Purdue University

URL: http://docs.lib.purdue.edu/open_access_theses/362

► Wire bonding is the process of forming electrical connection between the integrated circuit (IC) and its structural package. ICs made of material with low… (more)

▼ Wire bonding is the process of forming electrical connection between the integrated circuit (IC) and its structural package. ICs made of material with low dielectric constant (low-k) and ultra low-k are porous in nature, and are prone to fracture induced failure during packaging process. In recent years, there is increasing interest in copper wire bond technology as an alternative to gold wire bond in microelectronic devices due to its superior electrical performance and low cost. Copper wires are also approximately 25% more conductive than Au wires aiding in better heat dissipation. At present, validated constitutive models for the strain rate and temperature dependent behavior of Cu free-air ball (FAB) appear to be largely missing in the literature. The lack of reliable constitutive models for the Cu FAB has hampered the modeling of the wire bonding process and the ability to assess risk of fracture in ultra low-k dielectric stacks. The challenge to FAB characterization is primarily due to the difficulty in performing mechanical tests on spherical FAB of micrometers in size. To address this challenge, compression tests are performed on FAB using custom-built microscale tester in the current study. Specifically, the tester has three closed-loop controlled linear stages with submicron resolution, a manual tilt stage, a six-axis load cell with sub-Newton load resolution for eliminating misalignment, a milliNewton resolution load cell for compression load measurement, a capacitance sensor to estimate sample deformation and to control the vertical stage in closed loop, a high working depth camera for viewing the sample deformation, and controllers for the stages implemented in the LabVIEW environment. FAB is compressed between tungsten carbide punches and a constitutive model is developed for Cu FAB through an inverse modeling procedure. In the inverse procedure, appropriate constitutive model parameter values are iterated through an automated optimization workflow, until the load-displacement response matches the experimentally observed response. Using the material properties obtained from the experiment, a "macroscale" finite element model for the impact and ulatrasonic vibration stages of wire bonding process is constructed to simulate (a) Plastic deformation of the Cu FAB at different time steps (b) Evolution of contact pressure (c) Phenomenon such as pad splash and lift-off. The deformations from the macroscale model are provided as input to a microscale model of the dielectric with copper vias as well as line-type heterogeneities. The microscale model is used to identify potential crack nucleation sites as well as the crack path within the ILD stack during wire bonding. The modeling provides insight into the relative amounts of damage accumulated during the impact and the ultrasonic excitation stages. In general, Bonding over Active Circuit (BOAC) has made wire bonding a considerable challenge due to the brittleness of the dielectric. Identifying and locating microscale fractures beneath the bond pads… Advisors/Committee Members: Ganesh Subbarayan, Marcial Gonzalez, Ghadir Haikal.

Subjects/Keywords: Applied sciences; Experimental characterization; Finite element method; Fracture mechanics; Mechanical Engineering

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APA (6^th Edition):

Paranjothy, S. S. (2014). Experimental Characterization Of Cu Free-Air Ball And Simulations Of Dielectric Fracture During Wire Bonding. (Thesis). Purdue University. Retrieved from http://docs.lib.purdue.edu/open_access_theses/362

Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation

Chicago Manual of Style (16^th Edition):

Paranjothy, Sai Sudharsanan. “Experimental Characterization Of Cu Free-Air Ball And Simulations Of Dielectric Fracture During Wire Bonding.” 2014. Thesis, Purdue University. Accessed April 12, 2021. http://docs.lib.purdue.edu/open_access_theses/362.

Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation

MLA Handbook (7^th Edition):

Paranjothy, Sai Sudharsanan. “Experimental Characterization Of Cu Free-Air Ball And Simulations Of Dielectric Fracture During Wire Bonding.” 2014. Web. 12 Apr 2021.

Vancouver:

Paranjothy SS. Experimental Characterization Of Cu Free-Air Ball And Simulations Of Dielectric Fracture During Wire Bonding. [Internet] [Thesis]. Purdue University; 2014. [cited 2021 Apr 12]. Available from: http://docs.lib.purdue.edu/open_access_theses/362.

Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation

Council of Science Editors:

Paranjothy SS. Experimental Characterization Of Cu Free-Air Ball And Simulations Of Dielectric Fracture During Wire Bonding. [Thesis]. Purdue University; 2014. Available from: http://docs.lib.purdue.edu/open_access_theses/362

Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation

University of Toronto

16. Shojaei-Baghini, Ehsan. Automated Micropipette Aspiration of Single Cells.

Degree: 2012, University of Toronto

URL: http://hdl.handle.net/1807/33527

►

This research presents a system for mechanically characterizing single cells using automated micropipette aspiration. Using vision-based control and position control, the system controls a micromanipulator,… (more)

Subjects/Keywords: cell manipulation; automation; micropipette aspiration; mechanical characterization; 0548

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APA (6^th Edition):

Shojaei-Baghini, E. (2012). Automated Micropipette Aspiration of Single Cells. (Masters Thesis). University of Toronto. Retrieved from http://hdl.handle.net/1807/33527

Chicago Manual of Style (16^th Edition):

Shojaei-Baghini, Ehsan. “Automated Micropipette Aspiration of Single Cells.” 2012. Masters Thesis, University of Toronto. Accessed April 12, 2021. http://hdl.handle.net/1807/33527.

MLA Handbook (7^th Edition):

Shojaei-Baghini, Ehsan. “Automated Micropipette Aspiration of Single Cells.” 2012. Web. 12 Apr 2021.

Vancouver:

Shojaei-Baghini E. Automated Micropipette Aspiration of Single Cells. [Internet] [Masters thesis]. University of Toronto; 2012. [cited 2021 Apr 12]. Available from: http://hdl.handle.net/1807/33527.

Council of Science Editors:

Shojaei-Baghini E. Automated Micropipette Aspiration of Single Cells. [Masters Thesis]. University of Toronto; 2012. Available from: http://hdl.handle.net/1807/33527

Delft University of Technology

17. van den Berg, Ronald (author). A Novel Approach to Estimating the Material Properties of Atherosclerotic Plaque Tissue.

Degree: 2019, Delft University of Technology

URL: http://resolver.tudelft.nl/uuid:5b325e30-b6af-4993-a662-8189c83275ff

► The majority of cardiovascular clinical events, which are the main causes of mortality and morbidity worldwide, are caused by atherosclerotic plaque rupture. This biomechanical event… (more)

▼ The majority of cardiovascular clinical events, which are the main causes of mortality and morbidity worldwide, are caused by atherosclerotic plaque rupture. This biomechanical event occurs when the local plaque stresses exceed its strength. The plaque stresses can be assessed by computational models to predict these events. Current approaches to obtaining the plaque material stiffness properties that these models require as input have large computational costs and are therefore far from being implemented for clinical use. This study aims to develop, validate, and apply for the first time, an approach to obtaining the material stiffness properties of atherosclerotic plaque tissue much faster by employing the virtual fields method (VFM). With this method, the virtual work principle is employed with boundary problem specific, kinematically admissible virtual fields to solve energy balance equations for the material stiffness parameters that are of interest. In this study a method is presented for obtaining the virtual fields for the specific application of intraluminally pressurised atherosclerotic plaque tissue. For the purpose of validation, full field displacement maps were computed at 100 mmHg using Finite Element (FE) models based on histological slides of atherosclerotic plaque tissue. To mimic a realistic situation, the resolution and noise levels of a clinical and high frequency ultrasound scanner were used. Although higher resolution deformation maps with smaller noise levels were shown to provide more accurate results, the VFM-based technique demonstrated good performance for both the high frequency and clinical ultrasound scanner settings tested. VFM was also used in a single case study to estimate the c₁ material parameter for a Neo-Hookean incompressible material model in the case of an atherosclerotic human coronary artery. The estimated c₁-values for this case were: 21.5 kPa for diseased intima, 13.3 kPa for lipid, and 23.6 kPa for wall tissue. These values were in good agreement with the reported values from literature. In this study, VFM was applied successfully for the material characterization of atherosclerotic plaques for the first time. It is more attractive than current approaches as it is computationally less expensive and has a great potential to be extended for material characterization of even more plaque components than employed in the current study. Advisors/Committee Members: Zadpoor, Amir (mentor), Tolou, Nima (graduation committee), Mirzaali Mazandarani, Mohammad (graduation committee), Akyildiz, Ali (graduation committee), Delft University of Technology (degree granting institution).

Subjects/Keywords: Atheroslcerosis; Virtual Fields Method; Material properties; Mechanical characterization; Ultrasound

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APA (6^th Edition):

van den Berg, R. (. (2019). A Novel Approach to Estimating the Material Properties of Atherosclerotic Plaque Tissue. (Masters Thesis). Delft University of Technology. Retrieved from http://resolver.tudelft.nl/uuid:5b325e30-b6af-4993-a662-8189c83275ff

Chicago Manual of Style (16^th Edition):

van den Berg, Ronald (author). “A Novel Approach to Estimating the Material Properties of Atherosclerotic Plaque Tissue.” 2019. Masters Thesis, Delft University of Technology. Accessed April 12, 2021. http://resolver.tudelft.nl/uuid:5b325e30-b6af-4993-a662-8189c83275ff.

MLA Handbook (7^th Edition):

van den Berg, Ronald (author). “A Novel Approach to Estimating the Material Properties of Atherosclerotic Plaque Tissue.” 2019. Web. 12 Apr 2021.

Vancouver:

van den Berg R(. A Novel Approach to Estimating the Material Properties of Atherosclerotic Plaque Tissue. [Internet] [Masters thesis]. Delft University of Technology; 2019. [cited 2021 Apr 12]. Available from: http://resolver.tudelft.nl/uuid:5b325e30-b6af-4993-a662-8189c83275ff.

Council of Science Editors:

van den Berg R(. A Novel Approach to Estimating the Material Properties of Atherosclerotic Plaque Tissue. [Masters Thesis]. Delft University of Technology; 2019. Available from: http://resolver.tudelft.nl/uuid:5b325e30-b6af-4993-a662-8189c83275ff

18. Goudenhooft, Camille. Multi-scale characterization of flax stems and fibers : structure and mechanical performances : Caractérisation multi-échelle des tiges et fibres de lin : structure et performances mécaniques.

Degree: Docteur es, Sciences pour l'ingénieur. Génie des matériaux, 2018, Lorient

URL: http://www.theses.fr/2018LORIS500

►

Le lin (Linum usitatissimum L.) est une plante aux intérêts multiples. Sa tige est source de fibres, depuis longtemps utilisées dans le domaine du textile.… (more)

▼

Le lin (Linum usitatissimum L.) est une plante aux intérêts multiples. Sa tige est source de fibres, depuis longtemps utilisées dans le domaine du textile. Ce potentiel économique justifie la sélection variétale du lin en vue de développer des variétés plus riches en fibres et offrant une meilleure résistance aux maladies et la verse. Plus récemment, les fibres de lin ont vu leur utilisation s’étendre au renfort de matériaux composites grâce à leurs étonnantes propriétés mécaniques et morphologiques. Ces propriétés singulières s’expliquent grâce à leur développement et à leurs fonctions dans la tige. Ainsi, ce travail de thèse propose une caractérisation multi-échelle du lin, de la tige jusqu’à la paroi cellulaire de la fibre, afin de comprendre le lien entre les paramètres de croissance de la plante, le développement des fibres et leurs propriétés. L’architecture générale d’une tige de lin est explorée, ainsi que les conséquences de la sélection variétale sur cette structure et sur les propriétés des fibres. De plus, l’évolution des propriétés mécaniques des parois de fibres au cours de la croissance de la plante et de la phase de rouissage est caractérisée. En complément, la contribution des fibres à la rigidité en flexion d’une tige est mise en évidence, de même que leur rôle dans la résistance des tiges au flambage. Enfin, l’influence des conditions de culture sur les architectures des tiges et propriétés des fibres est étudiée par le biais de cultures en serre ou encore en simulant un phénomène de verse. Cette approche originale met en valeur les caractéristiques remarquables du lin qui en font un modèle de bioinspiration pour les matériaux composites de demain

Flax (Linum usitatissimum L.) is a plant with multiple interests. Its stem provides fibers, which have long been used in the textile industry. The economic potential of flax explains its varietal selection, aiming at developing varieties exhibiting higher fiber yields as well as greater resistance toward diseases and lodging. More recently, flax fibers have been dedicated to the reinforcement of composite materials due to their outstanding mechanical and morphological properties. These singular characteristics are related to fiber development and functions within the stem. Thus, the present work offers a multi-scale characterization of flax, from the stem to the fiber cell wall, in order to understand the link between plant growth parameters, the development of its fibers and their properties. The general architecture of a flax stem is investigated, as well as the impact of the varietal selection on this structure and on fiber performances. Moreover, changes in mechanical properties of fiber cell walls over plant growth and retting process are characterized. In addition, the fiber contribution to the stem stiffness is highlighted, as well as the fiber role in the resistance of the stem to buckling. The influence of culture conditions on stem architecture and fiber features is also studied through cultivations in greenhouse and by simulating a lodging…

Advisors/Committee Members: Baley, Christophe (thesis director), Bourmaud, Alain, Gilles (thesis director).

Subjects/Keywords: Biocomposites; Sélection variétale; Flax fibers – Mechanical properties; Multi-scale characterization; 620.118

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APA (6^th Edition):

Goudenhooft, C. (2018). Multi-scale characterization of flax stems and fibers : structure and mechanical performances : Caractérisation multi-échelle des tiges et fibres de lin : structure et performances mécaniques. (Doctoral Dissertation). Lorient. Retrieved from http://www.theses.fr/2018LORIS500

Chicago Manual of Style (16^th Edition):

Goudenhooft, Camille. “Multi-scale characterization of flax stems and fibers : structure and mechanical performances : Caractérisation multi-échelle des tiges et fibres de lin : structure et performances mécaniques.” 2018. Doctoral Dissertation, Lorient. Accessed April 12, 2021. http://www.theses.fr/2018LORIS500.

MLA Handbook (7^th Edition):

Goudenhooft, Camille. “Multi-scale characterization of flax stems and fibers : structure and mechanical performances : Caractérisation multi-échelle des tiges et fibres de lin : structure et performances mécaniques.” 2018. Web. 12 Apr 2021.

Vancouver:

Goudenhooft C. Multi-scale characterization of flax stems and fibers : structure and mechanical performances : Caractérisation multi-échelle des tiges et fibres de lin : structure et performances mécaniques. [Internet] [Doctoral dissertation]. Lorient; 2018. [cited 2021 Apr 12]. Available from: http://www.theses.fr/2018LORIS500.

Council of Science Editors:

Goudenhooft C. Multi-scale characterization of flax stems and fibers : structure and mechanical performances : Caractérisation multi-échelle des tiges et fibres de lin : structure et performances mécaniques. [Doctoral Dissertation]. Lorient; 2018. Available from: http://www.theses.fr/2018LORIS500

Northeastern University

19. Navabi, Arvand M.H. Mechanical characterization via full atomistic simulation: applications to nanocrystallized ice.

Degree: MS, Department of Civil and Environmental Engineering, 2016, Northeastern University

URL: http://hdl.handle.net/2047/D20238431

► This work employs molecular dynamic (MD) approaches to characterize the mechanical properties of nanocrystalline materials via a full atomistic simulation using the ab initio derived… (more)

Subjects/Keywords: ice; mechanical characterization; model; molecular dynamics; ReaxFF; simulation

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APA · Chicago · MLA · Vancouver · CSE | Export to Zotero / EndNote / Reference Manager

APA (6^th Edition):

Navabi, A. M. H. (2016). Mechanical characterization via full atomistic simulation: applications to nanocrystallized ice. (Masters Thesis). Northeastern University. Retrieved from http://hdl.handle.net/2047/D20238431

Chicago Manual of Style (16^th Edition):

Navabi, Arvand M H. “Mechanical characterization via full atomistic simulation: applications to nanocrystallized ice.” 2016. Masters Thesis, Northeastern University. Accessed April 12, 2021. http://hdl.handle.net/2047/D20238431.

MLA Handbook (7^th Edition):

Navabi, Arvand M H. “Mechanical characterization via full atomistic simulation: applications to nanocrystallized ice.” 2016. Web. 12 Apr 2021.

Vancouver:

Navabi AMH. Mechanical characterization via full atomistic simulation: applications to nanocrystallized ice. [Internet] [Masters thesis]. Northeastern University; 2016. [cited 2021 Apr 12]. Available from: http://hdl.handle.net/2047/D20238431.

Council of Science Editors:

Navabi AMH. Mechanical characterization via full atomistic simulation: applications to nanocrystallized ice. [Masters Thesis]. Northeastern University; 2016. Available from: http://hdl.handle.net/2047/D20238431

Virginia Tech

20. Tehrani, Mehran. Next Generation Multifunctional Composites for Impact, Vibration and Electromagnetic Radiation Hazard Mitigation.

Degree: PhD, Engineering Mechanics, 2012, Virginia Tech

URL: http://hdl.handle.net/10919/49547

► For many decades, fiber reinforced polymers (FRPs) have been extensively utilized in load-bearing structures. Their formability and superior in-plane mechanical properties have made them a… (more)

▼ For many decades, fiber reinforced polymers (FRPs) have been extensively utilized in load-bearing structures. Their formability and superior in-plane mechanical properties have made them a viable replacement for conventional structural materials. A major drawback to FRPs is their weak interlaminar properties (e.g., interlaminar fracture toughness). The need for lightweight multifunctional structures has become vital for many applications and hence alleviating the out-of-plane mechanical (i.e., quasi-static, vibration, and impact) and electrical properties of FRPs while retaining minimal weight is the subject of many ongoing studies. The primary objective of this dissertation is to investigate the fundamental processes for developing hybrid, multifunctional composites based on surface grown carbon nanotubes (CNTs) on carbon fibersýarns. This study embraces the development of a novel low temperature synthesis technique to grow CNTs on virtually any substrate. The developed method graphitic structures by design (GSD) offers the opportunity to place CNTs in advantageous areas of the composite (e.g., at the ply interface) where conventional fiber architectures are inadequate. The relatively low temperature of the GSD (i.e. 550 C) suppresses the undesired damage to the substrate fibers. GSD carries the advantage of growing uniform and almost aligned CNTs at pre-designated locations and thus eliminates the agglomeration and dispersion problems associated with incorporating CNTs in polymeric composites. The temperature regime utilized in GSD is less than those utilized by other synthesis techniques such as catalytic chemical vapor deposition (CCVD) where growing CNTs requires temperature not less than 700 C. It is of great importance to comprehend the reasons for and against using the methods involving mixing of the CNTs directly with the polymer matrix, to either fabricate nanocomposites or three-phase FRPs. Hence, chapter 2 is devoted to the characterization of CNTs-epoxy nanocomposites at different thermo-mechanical environments via the nanoindentation technique. Improvements in hardness and stiffness of the CNTs-reinforced epoxy are reported. Long duration (45 mins) nanocreep tests were conducted to study the viscoelastic behavior of the CNT-nanocomposites. Finally, the energy absorption of these nanocomposites is measured via novel nanoimpact testing module. Chapter 3 elucidates a study on the fabrication and characterization of a three phase CNT-epoxy system reinforced with woven carbon fibers. Tensile test, high velocity impact (~100 ms-1), and dynamic mechanical analysis (DMA) were employed to examine the response of the hybrid composite and compare it with the reference CFRP with no CNTs. Quasi-static shear punch tests (QSSPTs) were also performed to determine the toughening and damage mechanisms of both the CNTs-modified and the reference CFRP composites during transverse impact loading. The synthesis of CNTs at 550 C via GSD is the focus of chapter 4. The GSD technique was adjusted to grow… Advisors/Committee Members: Al-Haik, Marwan (committeechair), Jung, Sunghwan (committee member), Case, Scott W. (committee member), Ross, Shane D. (committee member), Hajj, Muhammad R. (committee member).

Subjects/Keywords: multiscale composites; carbon nanotubes; mechanical characterization; finite element method

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APA · Chicago · MLA · Vancouver · CSE | Export to Zotero / EndNote / Reference Manager

APA (6^th Edition):

Tehrani, M. (2012). Next Generation Multifunctional Composites for Impact, Vibration and Electromagnetic Radiation Hazard Mitigation. (Doctoral Dissertation). Virginia Tech. Retrieved from http://hdl.handle.net/10919/49547

Chicago Manual of Style (16^th Edition):

Tehrani, Mehran. “Next Generation Multifunctional Composites for Impact, Vibration and Electromagnetic Radiation Hazard Mitigation.” 2012. Doctoral Dissertation, Virginia Tech. Accessed April 12, 2021. http://hdl.handle.net/10919/49547.

MLA Handbook (7^th Edition):

Tehrani, Mehran. “Next Generation Multifunctional Composites for Impact, Vibration and Electromagnetic Radiation Hazard Mitigation.” 2012. Web. 12 Apr 2021.

Vancouver:

Tehrani M. Next Generation Multifunctional Composites for Impact, Vibration and Electromagnetic Radiation Hazard Mitigation. [Internet] [Doctoral dissertation]. Virginia Tech; 2012. [cited 2021 Apr 12]. Available from: http://hdl.handle.net/10919/49547.

Council of Science Editors:

Tehrani M. Next Generation Multifunctional Composites for Impact, Vibration and Electromagnetic Radiation Hazard Mitigation. [Doctoral Dissertation]. Virginia Tech; 2012. Available from: http://hdl.handle.net/10919/49547

University of Illinois – Urbana-Champaign

21. Zhang, Bingyang. Fabrication and mechanical characterization of liquid-in-solid elastomeric soft composites.

Degree: MS, Mechanical Engineering, 2016, University of Illinois – Urbana-Champaign

URL: http://hdl.handle.net/2142/90842

► As one of the emerging new composite materials, liquid-in-solid elastomer soft composites are of the current research interest for their enhanced mechanical properties and high… (more)

Subjects/Keywords: liquid-in-solid composite; fabrication; mechanical characterization; stiffening; toughening

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APA (6^th Edition):

Zhang, B. (2016). Fabrication and mechanical characterization of liquid-in-solid elastomeric soft composites. (Thesis). University of Illinois – Urbana-Champaign. Retrieved from http://hdl.handle.net/2142/90842

Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation

Chicago Manual of Style (16^th Edition):

Zhang, Bingyang. “Fabrication and mechanical characterization of liquid-in-solid elastomeric soft composites.” 2016. Thesis, University of Illinois – Urbana-Champaign. Accessed April 12, 2021. http://hdl.handle.net/2142/90842.

Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation

MLA Handbook (7^th Edition):

Zhang, Bingyang. “Fabrication and mechanical characterization of liquid-in-solid elastomeric soft composites.” 2016. Web. 12 Apr 2021.

Vancouver:

Zhang B. Fabrication and mechanical characterization of liquid-in-solid elastomeric soft composites. [Internet] [Thesis]. University of Illinois – Urbana-Champaign; 2016. [cited 2021 Apr 12]. Available from: http://hdl.handle.net/2142/90842.

Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation

Council of Science Editors:

Zhang B. Fabrication and mechanical characterization of liquid-in-solid elastomeric soft composites. [Thesis]. University of Illinois – Urbana-Champaign; 2016. Available from: http://hdl.handle.net/2142/90842

Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation

Duke University

22. Sycks, Dalton. Development and Characterization of Mechanically Robust, 3D-Printable Photopolymers .

Degree: 2017, Duke University

URL: http://hdl.handle.net/10161/16344

► 3D printing has seen an explosion of interest and growth in recent years, especially within the biomedical space. Prized for its efficiency, ability to… (more)

Subjects/Keywords: Materials Science; 3D Printing; Biomaterials; Mechanical Characterization; Soft Materials

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APA (6^th Edition):

Sycks, D. (2017). Development and Characterization of Mechanically Robust, 3D-Printable Photopolymers . (Thesis). Duke University. Retrieved from http://hdl.handle.net/10161/16344

Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation

Chicago Manual of Style (16^th Edition):

Sycks, Dalton. “Development and Characterization of Mechanically Robust, 3D-Printable Photopolymers .” 2017. Thesis, Duke University. Accessed April 12, 2021. http://hdl.handle.net/10161/16344.

Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation

MLA Handbook (7^th Edition):

Sycks, Dalton. “Development and Characterization of Mechanically Robust, 3D-Printable Photopolymers .” 2017. Web. 12 Apr 2021.

Vancouver:

Sycks D. Development and Characterization of Mechanically Robust, 3D-Printable Photopolymers . [Internet] [Thesis]. Duke University; 2017. [cited 2021 Apr 12]. Available from: http://hdl.handle.net/10161/16344.

Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation

Council of Science Editors:

Sycks D. Development and Characterization of Mechanically Robust, 3D-Printable Photopolymers . [Thesis]. Duke University; 2017. Available from: http://hdl.handle.net/10161/16344

Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation

University of South Carolina

23. Mobli, Mostafa. Characterization Of Evaporation/Condensation During Pool Boiling And Flow Boiling.

Degree: PhD, Mechanical Engineering, 2018, University of South Carolina

URL: https://scholarcommons.sc.edu/etd/4898

► Present dissertation has investigated pool and flow boiling and their characteristics via numerical means. A code was developed to investigate and enhance heat transfer… (more)

▼ Present dissertation has investigated pool and flow boiling and their characteristics via numerical means. A code was developed to investigate and enhance heat transfer performance during different modes of phase change phenomena. Multiphase heat transfer has proven to be one of the most effective means of heat transfer in different industries, therefore, there have been numerous experimental and numerical studies on the subject of phase change phenomena in a wide range of conditions and setups; yet there are complex bubble dynamics and heat transfer characteristics that remain unresolved. To have a more detailed look at and a better understanding of complex characteristics of phase change phenomena, our code focused on the mostly unresolved parts of this phenomena, such as spurious currents, interface diffusion, phase change modeling, micro-layer heat transfer, conjugate heat transfer effects and interfacial heat transfer coefficient. These complexities arise mostly because of small scale of the phase change phenomena and pace of phase change heat transfer, these scaling issues makes it difficult or in some cases impossible to design a robust and comprehensive experiment, which can study different aspects of phase change heat transfer. On the numerical side, lack of exact solutions and equations to phase change can cause immense problems in modeling and numerical studies. To mention a few of these numerical difficulties one can mention bubble or droplet curvature estimation which does not have an exact mathematical solution that can translate to a viable algorithm, or interfacial temperatures which is said to be most important factor driving phase change. To address some of these difficulties in numerical simulations we have employed volume of fluid method which benefits from global mass conservation combined with level set method which shows a more promising interface curvature estimation. Combining the two methods has proven to be a challenging task and, in some cases, not so much superior; therefore, a simplified method was employed to capture the best of the two methods. Phase change source terms was simulated based on none equilibrium conditions which states that phase change happens because of deviations of interface temperature from saturation temperature, unlike equilibrium condition which maintains the interface at saturation conditions. Using none equilibrium conditions forces a smaller grid onto simulation, which was cared by introduction of smearing factor. Other numerically challenging phenomena is micro-layer heat transfer which is mostly resolved by simplifying continuity, momentum and energy equations and deriving a set ODEs that are solved outside of main simulation algorithm. This is mostly due the fact micro-layer is mostly sub grid phenomena that cannot be seen by conventional CFD codes. We have employed a method that solves the micro-layer within the main algorithm without the need of solving those simplified set of ODEs and includes the none equilibrium interface conditions in… Advisors/Committee Members: Chen Li.

Subjects/Keywords: Engineering; Mechanical Engineering; Characterization; Evaporation; Condensation; Pool Boiling; Flow Boiling

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APA · Chicago · MLA · Vancouver · CSE | Export to Zotero / EndNote / Reference Manager

APA (6^th Edition):

Mobli, M. (2018). Characterization Of Evaporation/Condensation During Pool Boiling And Flow Boiling. (Doctoral Dissertation). University of South Carolina. Retrieved from https://scholarcommons.sc.edu/etd/4898

Chicago Manual of Style (16^th Edition):

Mobli, Mostafa. “Characterization Of Evaporation/Condensation During Pool Boiling And Flow Boiling.” 2018. Doctoral Dissertation, University of South Carolina. Accessed April 12, 2021. https://scholarcommons.sc.edu/etd/4898.

MLA Handbook (7^th Edition):

Mobli, Mostafa. “Characterization Of Evaporation/Condensation During Pool Boiling And Flow Boiling.” 2018. Web. 12 Apr 2021.

Vancouver:

Mobli M. Characterization Of Evaporation/Condensation During Pool Boiling And Flow Boiling. [Internet] [Doctoral dissertation]. University of South Carolina; 2018. [cited 2021 Apr 12]. Available from: https://scholarcommons.sc.edu/etd/4898.

Council of Science Editors:

Mobli M. Characterization Of Evaporation/Condensation During Pool Boiling And Flow Boiling. [Doctoral Dissertation]. University of South Carolina; 2018. Available from: https://scholarcommons.sc.edu/etd/4898

University of Maryland

24. Sun, Yong. Characterization of Non-linear Polymer Properties to Predict Process Induced Warpage and Residual Stress of Electronic Packages.

Degree: Mechanical Engineering, 2016, University of Maryland

URL: http://hdl.handle.net/1903/18236

► Nonlinear thermo-mechanical properties of advanced polymers are crucial to accurate prediction of the process induced warpage and residual stress of electronics packages. The Fiber Bragg… (more)

▼ Nonlinear thermo-mechanical properties of advanced polymers are crucial to accurate prediction of the process induced warpage and residual stress of electronics packages. The Fiber Bragg grating (FBG) sensor based method is advanced and implemented to determine temperature and time dependent nonlinear properties. The FBG sensor is embedded in the center of the cylindrical specimen, which deforms together with the specimen. The strains of the specimen at different loading conditions are monitored by the FBG sensor. Two main sources of the warpage are considered: curing induced warpage and coefficient of thermal expansion (CTE) mismatch induced warpage. The effective chemical shrinkage and the equilibrium modulus are needed for the curing induced warpage prediction. Considering various polymeric materials used in microelectronic packages, unique curing setups and procedures are developed for elastomers (extremely low modulus, medium viscosity, room temperature curing), underfill materials (medium modulus, low viscosity, high temperature curing), and epoxy molding compound (EMC: high modulus, high viscosity, high temperature pressure curing), most notably, (1) zero-constraint mold for elastomers; (2) a two-stage curing procedure for underfill materials and (3) an air-cylinder based novel setup for EMC. For the CTE mismatch induced warpage, the temperature dependent CTE and the comprehensive viscoelastic properties are measured. The cured cylindrical specimen with a FBG sensor embedded in the center is further used for viscoelastic property measurements. A uni-axial compressive loading is applied to the specimen to measure the time dependent Young’s modulus. The test is repeated from room temperature to the reflow temperature to capture the time-temperature dependent Young’s modulus. A separate high pressure system is developed for the bulk modulus measurement. The time temperature dependent bulk modulus is measured at the same temperatures as the Young’s modulus. The master curve of the Young’s modulus and bulk modulus of the EMC is created and a single set of the shift factors is determined from the time temperature superposition. The supplementary experiments are conducted to verify the validity of the assumptions associated with the linear viscoelasticity. The measured time-temperature dependent properties are further verified by a shadow moiré and Twyman/Green test. Advisors/Committee Members: Han, Bongtae (advisor).

Subjects/Keywords: Mechanical engineering; Electronic packaging; Polymer; Properties characterization; Residual stress; Warpage

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APA (6^th Edition):

Sun, Y. (2016). Characterization of Non-linear Polymer Properties to Predict Process Induced Warpage and Residual Stress of Electronic Packages. (Thesis). University of Maryland. Retrieved from http://hdl.handle.net/1903/18236

Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation

Chicago Manual of Style (16^th Edition):

Sun, Yong. “Characterization of Non-linear Polymer Properties to Predict Process Induced Warpage and Residual Stress of Electronic Packages.” 2016. Thesis, University of Maryland. Accessed April 12, 2021. http://hdl.handle.net/1903/18236.

Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation

MLA Handbook (7^th Edition):

Sun, Yong. “Characterization of Non-linear Polymer Properties to Predict Process Induced Warpage and Residual Stress of Electronic Packages.” 2016. Web. 12 Apr 2021.

Vancouver:

Sun Y. Characterization of Non-linear Polymer Properties to Predict Process Induced Warpage and Residual Stress of Electronic Packages. [Internet] [Thesis]. University of Maryland; 2016. [cited 2021 Apr 12]. Available from: http://hdl.handle.net/1903/18236.

Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation

Council of Science Editors:

Sun Y. Characterization of Non-linear Polymer Properties to Predict Process Induced Warpage and Residual Stress of Electronic Packages. [Thesis]. University of Maryland; 2016. Available from: http://hdl.handle.net/1903/18236

Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation

25. Benjamin, Colin Bruce Leighton. Characterization and Optimization of a Propeller Test Stand.

Degree: MS, Mechanical & Aerospace Engineering, 2019, Old Dominion University

URL: 9781085639361 ; https://digitalcommons.odu.edu/mae_etds/198

► In recent history, there has been a rapid rise in the use of drones, and they are expanding in popularity each year. The widespread… (more)

Subjects/Keywords: Characterization; Optimization; Propeller; Stand; Test; Aerospace Engineering; Mechanical Engineering

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APA (6^th Edition):

Benjamin, C. B. L. (2019). Characterization and Optimization of a Propeller Test Stand. (Thesis). Old Dominion University. Retrieved from 9781085639361 ; https://digitalcommons.odu.edu/mae_etds/198

Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation

Chicago Manual of Style (16^th Edition):

Benjamin, Colin Bruce Leighton. “Characterization and Optimization of a Propeller Test Stand.” 2019. Thesis, Old Dominion University. Accessed April 12, 2021. 9781085639361 ; https://digitalcommons.odu.edu/mae_etds/198.

Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation

MLA Handbook (7^th Edition):

Benjamin, Colin Bruce Leighton. “Characterization and Optimization of a Propeller Test Stand.” 2019. Web. 12 Apr 2021.

Vancouver:

Benjamin CBL. Characterization and Optimization of a Propeller Test Stand. [Internet] [Thesis]. Old Dominion University; 2019. [cited 2021 Apr 12]. Available from: 9781085639361 ; https://digitalcommons.odu.edu/mae_etds/198.

Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation

Council of Science Editors:

Benjamin CBL. Characterization and Optimization of a Propeller Test Stand. [Thesis]. Old Dominion University; 2019. Available from: 9781085639361 ; https://digitalcommons.odu.edu/mae_etds/198

Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation

26. Onyetube, Michael. Effect of Poisson’s Ratio on Young's Modulus Characterization Using Ultrasonic Technique by Modeling.

Degree: MS, Mechanical Engineering, 2018, South Dakota State University

URL: https://openprairie.sdstate.edu/etd/2664

► The past 27 years has witnessed a revolutionary growth in the progress of material development and application in almost all industry and business sectors,… (more)

Subjects/Keywords: ANSYS; Characterization; modeling; Poisson's ratio; Ultrasonic; Young's modulus; Mechanical Engineering

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APA (6^th Edition):

Onyetube, M. (2018). Effect of Poisson’s Ratio on Young's Modulus Characterization Using Ultrasonic Technique by Modeling. (Masters Thesis). South Dakota State University. Retrieved from https://openprairie.sdstate.edu/etd/2664

Chicago Manual of Style (16^th Edition):

Onyetube, Michael. “Effect of Poisson’s Ratio on Young's Modulus Characterization Using Ultrasonic Technique by Modeling.” 2018. Masters Thesis, South Dakota State University. Accessed April 12, 2021. https://openprairie.sdstate.edu/etd/2664.

MLA Handbook (7^th Edition):

Onyetube, Michael. “Effect of Poisson’s Ratio on Young's Modulus Characterization Using Ultrasonic Technique by Modeling.” 2018. Web. 12 Apr 2021.

Vancouver:

Onyetube M. Effect of Poisson’s Ratio on Young's Modulus Characterization Using Ultrasonic Technique by Modeling. [Internet] [Masters thesis]. South Dakota State University; 2018. [cited 2021 Apr 12]. Available from: https://openprairie.sdstate.edu/etd/2664.

Council of Science Editors:

Onyetube M. Effect of Poisson’s Ratio on Young's Modulus Characterization Using Ultrasonic Technique by Modeling. [Masters Thesis]. South Dakota State University; 2018. Available from: https://openprairie.sdstate.edu/etd/2664

Oklahoma State University

27. Churu, Habel Gitogo. Synthesis, Mechanical And Chemical, Characterization Of Vanadium- Based Aerogels.

Degree: Mechanical & Aerospace Engineering, 2009, Oklahoma State University

URL: http://hdl.handle.net/11244/9910

► Monolithic aerogels are highly mesoporous materials that have low density, low thermal conductivity, low dielectric constant as well as high acoustic impendence, a few of… (more)

Subjects/Keywords: aerogel; mechanical characterization; vanadia

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APA (6^th Edition):

Churu, H. G. (2009). Synthesis, Mechanical And Chemical, Characterization Of Vanadium- Based Aerogels. (Thesis). Oklahoma State University. Retrieved from http://hdl.handle.net/11244/9910

Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation

Chicago Manual of Style (16^th Edition):

Churu, Habel Gitogo. “Synthesis, Mechanical And Chemical, Characterization Of Vanadium- Based Aerogels.” 2009. Thesis, Oklahoma State University. Accessed April 12, 2021. http://hdl.handle.net/11244/9910.

Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation

MLA Handbook (7^th Edition):

Churu, Habel Gitogo. “Synthesis, Mechanical And Chemical, Characterization Of Vanadium- Based Aerogels.” 2009. Web. 12 Apr 2021.

Vancouver:

Churu HG. Synthesis, Mechanical And Chemical, Characterization Of Vanadium- Based Aerogels. [Internet] [Thesis]. Oklahoma State University; 2009. [cited 2021 Apr 12]. Available from: http://hdl.handle.net/11244/9910.

Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation

Council of Science Editors:

Churu HG. Synthesis, Mechanical And Chemical, Characterization Of Vanadium- Based Aerogels. [Thesis]. Oklahoma State University; 2009. Available from: http://hdl.handle.net/11244/9910

Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation

Miami University

28. Ling, Xiaoxuan. Dynamic Characterization, Control and Optimization of Viscoelastic Structures.

Degree: MS, Computational Science and Engineering, 2014, Miami University

URL: http://rave.ohiolink.edu/etdc/view?acc_num=miami1407504802

► Viscoelastic materials both store and dissipate energies and have frequency and temperature dependent properties. By tuning and optimizing the damping (viscous) and stiffness (elastic) properties… (more)

Subjects/Keywords: Mechanical Engineering; Viscoelastic materials; Dynamic characterization; Eigenvalues; Active control

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APA (6^th Edition):

Ling, X. (2014). Dynamic Characterization, Control and Optimization of Viscoelastic Structures. (Masters Thesis). Miami University. Retrieved from http://rave.ohiolink.edu/etdc/view?acc_num=miami1407504802

Chicago Manual of Style (16^th Edition):

Ling, Xiaoxuan. “Dynamic Characterization, Control and Optimization of Viscoelastic Structures.” 2014. Masters Thesis, Miami University. Accessed April 12, 2021. http://rave.ohiolink.edu/etdc/view?acc_num=miami1407504802.

MLA Handbook (7^th Edition):

Ling, Xiaoxuan. “Dynamic Characterization, Control and Optimization of Viscoelastic Structures.” 2014. Web. 12 Apr 2021.

Vancouver:

Ling X. Dynamic Characterization, Control and Optimization of Viscoelastic Structures. [Internet] [Masters thesis]. Miami University; 2014. [cited 2021 Apr 12]. Available from: http://rave.ohiolink.edu/etdc/view?acc_num=miami1407504802.

Council of Science Editors:

Ling X. Dynamic Characterization, Control and Optimization of Viscoelastic Structures. [Masters Thesis]. Miami University; 2014. Available from: http://rave.ohiolink.edu/etdc/view?acc_num=miami1407504802

University of Cincinnati

29. Kolhekar, Ketaki R. Study of Gas Film and its Effect on the Electrochemical Discharge Machining Process.

Degree: MS, Engineering and Applied Science: Mechanical Engineering, 2018, University of Cincinnati

URL: http://rave.ohiolink.edu/etdc/view?acc_num=ucin1522419144100495

► The upsurge in product miniaturization in different field such as chemical, MEMS, optical and biomedical industry demands for materials with robust mechanical, chemical and optical… (more)

Subjects/Keywords: Mechanical Engineering; ECDM; gas film; characterization; multi-phase; overcut; simulation

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APA (6^th Edition):

Kolhekar, K. R. (2018). Study of Gas Film and its Effect on the Electrochemical Discharge Machining Process. (Masters Thesis). University of Cincinnati. Retrieved from http://rave.ohiolink.edu/etdc/view?acc_num=ucin1522419144100495

Chicago Manual of Style (16^th Edition):

Kolhekar, Ketaki R. “Study of Gas Film and its Effect on the Electrochemical Discharge Machining Process.” 2018. Masters Thesis, University of Cincinnati. Accessed April 12, 2021. http://rave.ohiolink.edu/etdc/view?acc_num=ucin1522419144100495.

MLA Handbook (7^th Edition):

Kolhekar, Ketaki R. “Study of Gas Film and its Effect on the Electrochemical Discharge Machining Process.” 2018. Web. 12 Apr 2021.

Vancouver:

Kolhekar KR. Study of Gas Film and its Effect on the Electrochemical Discharge Machining Process. [Internet] [Masters thesis]. University of Cincinnati; 2018. [cited 2021 Apr 12]. Available from: http://rave.ohiolink.edu/etdc/view?acc_num=ucin1522419144100495.

Council of Science Editors:

Kolhekar KR. Study of Gas Film and its Effect on the Electrochemical Discharge Machining Process. [Masters Thesis]. University of Cincinnati; 2018. Available from: http://rave.ohiolink.edu/etdc/view?acc_num=ucin1522419144100495

University of Cincinnati

30. Dalai, Biswajit. Microstructure and Properties of Solid-State Additively Processed Alloy 600 Claddings on 304L Stainless Steel.

Degree: MS, Engineering and Applied Science: Materials Science, 2018, University of Cincinnati

URL: http://rave.ohiolink.edu/etdc/view?acc_num=ucin1542724808933024

► The microstructure and stress states bestowed by the manufacturing process administer the reliability and performance of each component in its final application. Additive Manufacturing (AM)… (more)

▼ The microstructure and stress states bestowed by the manufacturing process administer the reliability and performance of each component in its final application. Additive Manufacturing (AM) is the trending process among all the innovative methods to produce uniform distribution of microstructure and properties in the constituent parts in a cost-effective manner. However, most of the fusion based manufacturing techniques possess a drawback in the form of residual stresses developed during the processing stage. This demands for the development of more effective AM methods having the potential for near-net shape manufacturing of the parts with minimized residual stresses which has led to the inception of a novel solid-state AM process named “MELD”.This study investigated the microstructure and properties developed in the multi-layer Alloy 600 deposit on 304L stainless steel manufactured by MELD process. Unlike other fusion based AM processes, MELD showed a compressive residual stress (~ -380 MPa) on the surface of the deposited material. The average hardness of the deposit (~ 3.29 GPa) was comparable with that of Alloy 600 manufactured by other AM processes. Additionally, a localized increase in the hardness could be observed at the interfaces between two subsequent layers which was attributed to the grain refinement resulting from dynamic recrystallization in the interfacial areas during the MELD process. Large amount of carbide precipitates formed during the recrystallization at the interface restricted the grains size by pinning them together. High temperature in areas away from interface caused dissolution of carbides leading to grain coarsening. This trend of grains size and carbide precipitates was repeated in each of the deposited layers. The point and space group of the carbide precipitate was determined from TEM analysis. The deposit possessed very low dislocation density and hence low plasticity. Though, the distribution of sub-grains and low angle boundaries followed a particular pattern in all the layers. A very strong texture was exhibited by the as-MELD processed deposit. It also displayed substantially higher tensile properties than other solid-state process counterparts.Advanced mechanical surface treatments were performed to develop plastic strains in the near surface region of the material. The effects of LSP could be observed to a much deeper extent. High compressive residual stresses of -1400 MPa and -900 MPa were measured in case of UNSM and LSP, respectively. UNSM increased the near surface hardness to 4.92 GPa, whereas, LSP increased the value to 4.3 GPa.The as-MELD processed Alloy 600 was annealed at 400°, 500°, 600° and 700° C each for 2 hours. The grains size distribution of annealed material followed the same pattern exhibited by the as-MELD processed material. Annealing at 400° and 500° C did not have much effects on the microstructural features. Though, the carbides that remained dissolved inside the matrix during the MELD processing, seemed to have reappeared when the material was annealed… Advisors/Committee Members: Vasuedevan, Vijay (Committee Chair).

Subjects/Keywords: Materials Science; MELD; Characterization; EBSD; Mechanical properties; Surface treatments; Heat treatment

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APA · Chicago · MLA · Vancouver · CSE | Export to Zotero / EndNote / Reference Manager

APA (6^th Edition):

Dalai, B. (2018). Microstructure and Properties of Solid-State Additively Processed Alloy 600 Claddings on 304L Stainless Steel. (Masters Thesis). University of Cincinnati. Retrieved from http://rave.ohiolink.edu/etdc/view?acc_num=ucin1542724808933024

Chicago Manual of Style (16^th Edition):

Dalai, Biswajit. “Microstructure and Properties of Solid-State Additively Processed Alloy 600 Claddings on 304L Stainless Steel.” 2018. Masters Thesis, University of Cincinnati. Accessed April 12, 2021. http://rave.ohiolink.edu/etdc/view?acc_num=ucin1542724808933024.

MLA Handbook (7^th Edition):

Dalai, Biswajit. “Microstructure and Properties of Solid-State Additively Processed Alloy 600 Claddings on 304L Stainless Steel.” 2018. Web. 12 Apr 2021.

Vancouver:

Dalai B. Microstructure and Properties of Solid-State Additively Processed Alloy 600 Claddings on 304L Stainless Steel. [Internet] [Masters thesis]. University of Cincinnati; 2018. [cited 2021 Apr 12]. Available from: http://rave.ohiolink.edu/etdc/view?acc_num=ucin1542724808933024.

Council of Science Editors:

Dalai B. Microstructure and Properties of Solid-State Additively Processed Alloy 600 Claddings on 304L Stainless Steel. [Masters Thesis]. University of Cincinnati; 2018. Available from: http://rave.ohiolink.edu/etdc/view?acc_num=ucin1542724808933024

Open Access Theses and Dissertations