subject:(Aerospace Materials)

University of Cincinnati

1. Lamping, Anthony P. Design and Implementation of UAV Multi-Agent System Technology Research Software Platform: FlyMASTER.

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

URL: http://rave.ohiolink.edu/etdc/view?acc_num=ucin152362921159089

► FlyMASTER provides researchers of multi-agent UAV systems with a software platform promoting ease of integration, rapid development and flexibility to further advancement in the field… (more)

Subjects/Keywords: Aerospace Materials

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APA (6^th Edition):

Lamping, A. P. (2018). Design and Implementation of UAV Multi-Agent System Technology Research Software Platform: FlyMASTER. (Masters Thesis). University of Cincinnati. Retrieved from http://rave.ohiolink.edu/etdc/view?acc_num=ucin152362921159089

Chicago Manual of Style (16^th Edition):

Lamping, Anthony P. “Design and Implementation of UAV Multi-Agent System Technology Research Software Platform: FlyMASTER.” 2018. Masters Thesis, University of Cincinnati. Accessed March 08, 2021. http://rave.ohiolink.edu/etdc/view?acc_num=ucin152362921159089.

MLA Handbook (7^th Edition):

Lamping, Anthony P. “Design and Implementation of UAV Multi-Agent System Technology Research Software Platform: FlyMASTER.” 2018. Web. 08 Mar 2021.

Vancouver:

Lamping AP. Design and Implementation of UAV Multi-Agent System Technology Research Software Platform: FlyMASTER. [Internet] [Masters thesis]. University of Cincinnati; 2018. [cited 2021 Mar 08]. Available from: http://rave.ohiolink.edu/etdc/view?acc_num=ucin152362921159089.

Council of Science Editors:

Lamping AP. Design and Implementation of UAV Multi-Agent System Technology Research Software Platform: FlyMASTER. [Masters Thesis]. University of Cincinnati; 2018. Available from: http://rave.ohiolink.edu/etdc/view?acc_num=ucin152362921159089

University of Cincinnati

2. Rangwala, Udeet Yatin. Experimental Evaluation of Combustion Performance at Sub-Idle Conditions.

Degree: MS, Engineering and Applied Science: Aerospace Engineering, 2019, University of Cincinnati

URL: http://rave.ohiolink.edu/etdc/view?acc_num=ucin1571833821599461

► The necessity to tackle the emission challenges in aircraft jet engines has been an important factor in the evolution of modern gas turbine combustor designs.… (more)

▼ The necessity to tackle the emission challenges in aircraft jet engines has been an important factor in the evolution of modern gas turbine combustor designs. Operation at fuel-lean conditions, characterized by an increase in the amount of air flow sent to the primary combustion zone has been a popular method used by engine manufacturers to achieve low NOx emissions. Although useful in reducing NOx emissions, this trend has only made the problem of high altitude relight more difficult as these combustor designs depend on high energy and high velocity flows to adequately atomize and mix fuel droplets with air leading to lower flame stability during low-power operation. Combined with low ambient air temperatures and pressures, this can increase the risk of flame-out situations and make the process of relight more difficult. This paper presents an overview of the experimental investigation of the overall combustion performance at these sub-idle conditions conducted at the High Altitude Relight Facility (HARTF) at the University of Cincinnati Combustion and Fire Research Laboratory (CFRL).Extensive testing was performed in a linearly arranged five fuel-air swirler array at low pressure and low temperature conditions simulated at the facility. The combustion performance was primarily evaluated by measuring the fuel drop size downstream of the fuel injector in the combustion sector and by performing emissions measurements of the exhaust gases. The fuel drop size was measured using a two component Phase Doppler Interferometer (PDI) in a reacting flow to study the effect of sub-idle conditions on the fuel atomization in a simplex nozzle. Reported here are the results of the effect of the fuel injection pressure, the air pressure drop and the ambient air pressure on the fuel drop size and distribution, measured radially across the injector. It was found that the Sauter Mean Diameter increased with a decrease in the fuel injection pressure and air pressure drop whereas it decreased with a decrease in the ambient air pressure.Emissions measurements were performed to find the carbon monoxide, oxygen and total hydrocarbon content in the exhaust gases. Design provisions were made in the test sector to allow for two configurations based on the downstream location of dilution-air holes. The carbon monoxide and oxygen were measured using a Paramagnetic Oxygen Analyzer (PMA) and the total hydrocarbon content in the gas was measured using a Flame Ionization Detection (FID) analyzer. Using this data, the carbon dioxide content, emission indices of the gas constituents and the combustion efficiency was calculated. The results discuss the effect of the ambient air pressure, air temperature and the design configuration on the combustion efficiency at sub-idle conditions. The combustion efficiency decreased as the ambient air pressure and temperature were lowered. Advisors/Committee Members: Jeng, San-Mou (Committee Chair).

Subjects/Keywords: Aerospace Materials

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APA (6^th Edition):

Rangwala, U. Y. (2019). Experimental Evaluation of Combustion Performance at Sub-Idle Conditions. (Masters Thesis). University of Cincinnati. Retrieved from http://rave.ohiolink.edu/etdc/view?acc_num=ucin1571833821599461

Chicago Manual of Style (16^th Edition):

Rangwala, Udeet Yatin. “Experimental Evaluation of Combustion Performance at Sub-Idle Conditions.” 2019. Masters Thesis, University of Cincinnati. Accessed March 08, 2021. http://rave.ohiolink.edu/etdc/view?acc_num=ucin1571833821599461.

MLA Handbook (7^th Edition):

Rangwala, Udeet Yatin. “Experimental Evaluation of Combustion Performance at Sub-Idle Conditions.” 2019. Web. 08 Mar 2021.

Vancouver:

Rangwala UY. Experimental Evaluation of Combustion Performance at Sub-Idle Conditions. [Internet] [Masters thesis]. University of Cincinnati; 2019. [cited 2021 Mar 08]. Available from: http://rave.ohiolink.edu/etdc/view?acc_num=ucin1571833821599461.

Council of Science Editors:

Rangwala UY. Experimental Evaluation of Combustion Performance at Sub-Idle Conditions. [Masters Thesis]. University of Cincinnati; 2019. Available from: http://rave.ohiolink.edu/etdc/view?acc_num=ucin1571833821599461

University of Cincinnati

3. Medhi, Jishu K. Modular Architecture for Intelligent Aerial Manipulators.

Degree: MS, Engineering and Applied Science: Aerospace Engineering, 2019, University of Cincinnati

URL: http://rave.ohiolink.edu/etdc/view?acc_num=ucin1573811910421278

► Unmanned aerial vehicles are becoming increasingly popular all over the world, with the development of the technology allowing it to be shifted out of the… (more)

▼ Unmanned aerial vehicles are becoming increasingly popular all over the world, with the development of the technology allowing it to be shifted out of the research lab and into the commercial sector. For quite a while now, UAVs have been used by various institutions for military surveillance, aerial photography, and agricultural crop monitoring. Although most commercially available civilian drones do an excellent job at surveillance tasks, these platforms generally are not equipped to handle tasks that require direct environmental intervention and interaction. Although humans are usually better suited to freely interact with low-altitude surroundings (within 100 feet of the ground), there are several instances where direct human interaction may not be possible because the environment may be too dangerous, hostile, or inaccessible to people. In situations like these, the unique capabilities of an aerial manipulator – an unmanned aerial vehicle that has a robotic manipulator mechanically attached to its body to manipulate its environment – can come into the picture.This thesis presents research work done to implement and test a modular and resilient system architecture for aerial manipulator operations. The system architecture used in this research is loosely based on NASA JPL's Resilient Spacecraft Executive, which was initially intended to robustly handle uncertainties for spacecraft operations. The entire system architecture of the aerial manipulator is comprised of three different layers – deliberative, habitual and reflexive – each of which communicate back and forth with each other via a common message passing framework, such as the Robot Operating System (ROS) (which was used in this implementation). A major part of this research involved the use of a mid-fidelity dynamic simulation environment with a physics model available that could accurately show `good’ and `mis’behavior of the aerial manipulator in offline testing, prior to tests involving real physical hardware. As such, the ROS-native Gazebo 3D simulator and MoveIt interface were used for simulation and path planning of the manipulator, respectively. To validate the feasibility of the proposed system architecture, test cases for three different phases of flight with four manipulator actions are considered, and the results of the simulation are presented. Note that the source code and models created and modified for use in this work are all available for general use under a BSD 3-clause open source license at https://github.com/medhijk/ROS_quadrotor_simulator. Advisors/Committee Members: McGhan, Catharine (Committee Chair).

Subjects/Keywords: Aerospace Materials

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APA (6^th Edition):

Medhi, J. K. (2019). Modular Architecture for Intelligent Aerial Manipulators. (Masters Thesis). University of Cincinnati. Retrieved from http://rave.ohiolink.edu/etdc/view?acc_num=ucin1573811910421278

Chicago Manual of Style (16^th Edition):

Medhi, Jishu K. “Modular Architecture for Intelligent Aerial Manipulators.” 2019. Masters Thesis, University of Cincinnati. Accessed March 08, 2021. http://rave.ohiolink.edu/etdc/view?acc_num=ucin1573811910421278.

MLA Handbook (7^th Edition):

Medhi, Jishu K. “Modular Architecture for Intelligent Aerial Manipulators.” 2019. Web. 08 Mar 2021.

Vancouver:

Medhi JK. Modular Architecture for Intelligent Aerial Manipulators. [Internet] [Masters thesis]. University of Cincinnati; 2019. [cited 2021 Mar 08]. Available from: http://rave.ohiolink.edu/etdc/view?acc_num=ucin1573811910421278.

Council of Science Editors:

Medhi JK. Modular Architecture for Intelligent Aerial Manipulators. [Masters Thesis]. University of Cincinnati; 2019. Available from: http://rave.ohiolink.edu/etdc/view?acc_num=ucin1573811910421278

University of Cincinnati

4. Nichols, Schuyler R. Experimental Approach to the Feasibility of an Axially-Stacked Propeller System.

Degree: MS, Engineering and Applied Science: Aerospace Engineering, 2014, University of Cincinnati

URL: http://rave.ohiolink.edu/etdc/view?acc_num=ucin1415626159

► The aerospace industry is experiencing an ever increasing demand for cheaper, quieter, and more efficient propulsion systems. This demand has placed much pressure on engineers… (more)

▼ The aerospace industry is experiencing an ever increasing demand for cheaper, quieter, and more efficient propulsion systems. This demand has placed much pressure on engineers to further explore the uses of existing technology to levels that in times past did not seem possible, due to limited technology capabilities. One form of research that has re-gained much attention in the past couple decades is the use of propeller driven systems. Propellers are unique in the sense that they can be manipulated in many ways to fit the needs of a certain demand. The intention of this thesis is to use an experimental approach to expand on this line of thinking in the form of a single shaft, axially stack propeller system. This experimentation is intended to explore the propulsion effects of this said system. The experiment itself was run using two common R/C aircraft propellers mounted on a single shaft that was attached to an electric motor. The axial distance between the propellers was increased at each new stage of the experiment, during which downward force was monitored and recorded at designated RPM’s of the motor. At each axial distance, as well as each RPM setting, the propellers were also adjusted to designated relative angles to one another. Overall, the experiment was broken down into three phases. The first phase used two propellers of equal diameter and pitch. The second phase used a smaller diameter propeller stacked on top of a larger diameter propeller, with each propeller having the same pitch. The third phase used a larger diameter propeller stacked on top of a smaller diameter propeller, once again with each propeller having the same pitch. For all three configurations, the relative angle between the propellers was varied from 0° to 135°, at increments of 45°. For the most part, the results of the experiment can most effectively be explained by the Actuator Disc Theory, seeing that the before mention third phase of the experiment performed the most efficiently, as opposed to the second phase, which performed the least efficiently. Advisors/Committee Members: Abdallah, Shaaban (Committee Chair).

Subjects/Keywords: Aerospace Materials; Propeller

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APA (6^th Edition):

Nichols, S. R. (2014). Experimental Approach to the Feasibility of an Axially-Stacked Propeller System. (Masters Thesis). University of Cincinnati. Retrieved from http://rave.ohiolink.edu/etdc/view?acc_num=ucin1415626159

Chicago Manual of Style (16^th Edition):

Nichols, Schuyler R. “Experimental Approach to the Feasibility of an Axially-Stacked Propeller System.” 2014. Masters Thesis, University of Cincinnati. Accessed March 08, 2021. http://rave.ohiolink.edu/etdc/view?acc_num=ucin1415626159.

MLA Handbook (7^th Edition):

Nichols, Schuyler R. “Experimental Approach to the Feasibility of an Axially-Stacked Propeller System.” 2014. Web. 08 Mar 2021.

Vancouver:

Nichols SR. Experimental Approach to the Feasibility of an Axially-Stacked Propeller System. [Internet] [Masters thesis]. University of Cincinnati; 2014. [cited 2021 Mar 08]. Available from: http://rave.ohiolink.edu/etdc/view?acc_num=ucin1415626159.

Council of Science Editors:

Nichols SR. Experimental Approach to the Feasibility of an Axially-Stacked Propeller System. [Masters Thesis]. University of Cincinnati; 2014. Available from: http://rave.ohiolink.edu/etdc/view?acc_num=ucin1415626159

5. Park, Conrad. Mechanical Performance and Structure-Property Relations in6061B Aluminum Metal Matrix Composites.

Degree: MSs (Engineering), Materials Science and Engineering, 2019, Case Western Reserve University School of Graduate Studies

URL: http://rave.ohiolink.edu/etdc/view?acc_num=case1547842396716777

► The effects of processing (e.g., HIP, CIP+Upset, Extrusion) and reinforcement size/ volume fraction on the mechanical behavior of 6061B Aluminum/SiCp composites were determined at room… (more)

Subjects/Keywords: Aerospace Materials; Materials Science; Metallurgy

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APA (6^th Edition):

Park, C. (2019). Mechanical Performance and Structure-Property Relations in6061B Aluminum Metal Matrix Composites. (Masters Thesis). Case Western Reserve University School of Graduate Studies. Retrieved from http://rave.ohiolink.edu/etdc/view?acc_num=case1547842396716777

Chicago Manual of Style (16^th Edition):

Park, Conrad. “Mechanical Performance and Structure-Property Relations in6061B Aluminum Metal Matrix Composites.” 2019. Masters Thesis, Case Western Reserve University School of Graduate Studies. Accessed March 08, 2021. http://rave.ohiolink.edu/etdc/view?acc_num=case1547842396716777.

MLA Handbook (7^th Edition):

Park, Conrad. “Mechanical Performance and Structure-Property Relations in6061B Aluminum Metal Matrix Composites.” 2019. Web. 08 Mar 2021.

Vancouver:

Park C. Mechanical Performance and Structure-Property Relations in6061B Aluminum Metal Matrix Composites. [Internet] [Masters thesis]. Case Western Reserve University School of Graduate Studies; 2019. [cited 2021 Mar 08]. Available from: http://rave.ohiolink.edu/etdc/view?acc_num=case1547842396716777.

Council of Science Editors:

Park C. Mechanical Performance and Structure-Property Relations in6061B Aluminum Metal Matrix Composites. [Masters Thesis]. Case Western Reserve University School of Graduate Studies; 2019. Available from: http://rave.ohiolink.edu/etdc/view?acc_num=case1547842396716777

Purdue University

6. Ritchey, Andrew J. Recovery of microfields in fiber-reinforced composite materials| Principles and limitations.

Degree: 2013, Purdue University

URL: http://pqdtopen.proquest.com/#viewpdf?dispub=3545363

► A detailed investigation of the limitations and errors induced by modeling a composite layer composed of straight carbon fibers embedded in an epoxy matrix… (more)

▼ A detailed investigation of the limitations and errors induced by modeling a composite layer composed of straight carbon fibers embedded in an epoxy matrix as an homogenous layer with Cauchy effective moduli is performed. Specifically, the material system studied has IM7 carbon fibers arranged in a square array and bonded together with 8552 epoxy resin (IM7/8552). The finite element method is used to study the effect of free surfaces on the local elastic fields in 0°, 45° and 90° laminae, in which as many as 256 individual fibers are modeled. Through these analyses, it is shown that a micro-boundary layer, analogous to the macro-boundary layer observed in composite laminates, is developed at the microlevel. Additionally, [0/90]_s and [90/0]_s laminates are studied to investigate the joint action of the macro- and micro-boundary layers. Unless otherwise noted, fiber volume fractions of Vƒ=0.20 and Vƒ=0.65 are selected and the domains are subjected to uniform axial extension. Although this study is done for a highly idealized geometry (i.e. with a single material system and under a simple loading condition) the principles of periodicity, symmetry and antisymmetry used to efficiently perform a direct numerical simulation with a large number of fiber inclusions is general, and can be applied to more complicated geometries and boundary conditions. The purpose of the current work is to be the first step in a building block approach to understanding the interaction of multiple scales in fiber-reinforced composites through direct numerical simulations. The main part of the current manuscript focuses on the characterization of a micro-boundary layer that develops in fiber reinforced composite layers. This phenomena results from the changing constraints on the constituent phases as a result of discontinuities, such as free surfaces or ply interfaces. The effect is most pronounced in laminae that have a fiber termination intersecting a free surface, and appears to be maximized in a 90° lamina. In an individual lamina, under uniform extension, the micro-boundary layer emanating from a free surface intersected by a fiber termination is analogous to the macro-boundary layer described by Pipes and Pagano. One consequence of the micro-boundary layer is a variation of apparent moduli in this region. The use of homogeneous effective moduli, whether they are based on Cauchy elasticity, micropolar elasticity, or some other higher order theory, cannot capture the effect in composite laminae. Methods based on the use of modified effective modulus theory (e.g. GOALS or Voroni cell finite elements) are capable of capturing this effect. This is because these types of methods place a realistic representation of the microstructure in critical locations. Accuracy results when correct microstructure overlaps correct boundary conditions. The methods used to perform direct numerical simulations on individual…

Subjects/Keywords: Engineering, Aerospace; Engineering, Materials Science

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APA (6^th Edition):

Ritchey, A. J. (2013). Recovery of microfields in fiber-reinforced composite materials| Principles and limitations. (Thesis). Purdue University. Retrieved from http://pqdtopen.proquest.com/#viewpdf?dispub=3545363

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):

Ritchey, Andrew J. “Recovery of microfields in fiber-reinforced composite materials| Principles and limitations.” 2013. Thesis, Purdue University. Accessed March 08, 2021. http://pqdtopen.proquest.com/#viewpdf?dispub=3545363.

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

MLA Handbook (7^th Edition):

Ritchey, Andrew J. “Recovery of microfields in fiber-reinforced composite materials| Principles and limitations.” 2013. Web. 08 Mar 2021.

Vancouver:

Ritchey AJ. Recovery of microfields in fiber-reinforced composite materials| Principles and limitations. [Internet] [Thesis]. Purdue University; 2013. [cited 2021 Mar 08]. Available from: http://pqdtopen.proquest.com/#viewpdf?dispub=3545363.

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

Council of Science Editors:

Ritchey AJ. Recovery of microfields in fiber-reinforced composite materials| Principles and limitations. [Thesis]. Purdue University; 2013. Available from: http://pqdtopen.proquest.com/#viewpdf?dispub=3545363

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

University of California – San Diego

7. Chen, Tze-Han. Developing Lunar “Cement” Using Lunar Soils.

Degree: Materials Sci and Engineering, 2015, University of California – San Diego

URL: http://www.escholarship.org/uc/item/95s2j254

► In order to build massive outposts or telescopes on the Moon. it have been decades since the call of a structural material, lunar “cement”, based… (more)

Subjects/Keywords: Materials Science; Aerospace engineering; Plastics

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APA (6^th Edition):

Chen, T. (2015). Developing Lunar “Cement” Using Lunar Soils. (Thesis). University of California – San Diego. Retrieved from http://www.escholarship.org/uc/item/95s2j254

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):

Chen, Tze-Han. “Developing Lunar “Cement” Using Lunar Soils.” 2015. Thesis, University of California – San Diego. Accessed March 08, 2021. http://www.escholarship.org/uc/item/95s2j254.

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

MLA Handbook (7^th Edition):

Chen, Tze-Han. “Developing Lunar “Cement” Using Lunar Soils.” 2015. Web. 08 Mar 2021.

Vancouver:

Chen T. Developing Lunar “Cement” Using Lunar Soils. [Internet] [Thesis]. University of California – San Diego; 2015. [cited 2021 Mar 08]. Available from: http://www.escholarship.org/uc/item/95s2j254.

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

Council of Science Editors:

Chen T. Developing Lunar “Cement” Using Lunar Soils. [Thesis]. University of California – San Diego; 2015. Available from: http://www.escholarship.org/uc/item/95s2j254

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

Stellenbosch University

8. Nortje, Hermann. An investigation of fretting wear in aerospace applications.

Degree: MScEng, Industrial Engineering, 2011, Stellenbosch University

URL: http://hdl.handle.net/10019.1/17851

►

ENGLISH ABSTRACT: Fretting wear results in the loss of fit and tolerance at contact interfaces. The aerospace and aircraft industry is severely impacted by fretting… (more)

▼

ENGLISH ABSTRACT: Fretting wear results in the loss of fit and tolerance at contact interfaces. The aerospace and aircraft industry is severely impacted by fretting wear and fretting fatigue that frequently occurs in turbo machinery and riveted structural connections. There have been numerous studies, investigating the fretting phenomenon for these aerospace applications. Literature available in regard to fretting wear encountered in these aerospace applications is limited. This study is therefore aimed at investigating the fretting wear encountered in aerospace application. An in-house fretting test apparatus was specially designed and developed in order to perform the fretting wear experiments. Ti-6Al-4V and Al7075-T6 are the two aerospace materials that were tested using the fretting test apparatus. An extensive experimental study was conducted in order to investigate the effect of the normal force on the fretting wear and friction behaviour of the two aerospace materials. The most severe of these experiments were identified and then repeated for up to 106 fretting cycles. Additional fretting wear experiments were also conducted between the two aerospace materials and cemented carbides, since the carbides are currently being utilized as coatings in some aerospace contacts that are prone to fretting induced damage. The experimental study revealed that a decrease in the normal force resulted in an increase in the severity of the fretting wear of both aerospace materials. The additional fretting wear experiments involving carbide-metal contact couples found that Ti-6Al-4V and Al7075-T6 were prone to adhesive wear.

AFRIKAANSE OPSOMMING: Knaagslytasie veroorsaak materiaalverlies by die kontakoppervlakke. Die lugvaart industrie is erg geraak deur knaagslytasie en knaaguitputting wat dikwels voorkom in turbo-enjin toepassings en strukturele verbindings. Daar was al talle studies gedoen oor die effek van knaag op lugvaart toepassings. Literatuur met betrekking tot knaagslytasie in lugvaart toepassings is egter beperk. Hierdie studie was dus gemik daarop om knaagslytasie in sekere lugvaart toepassings te ondersoek. Tydens die studie is ŉ toetsopstelling ontwerp en ontwikkel om knaagslytasie eksperimente uit te voer. Ti-6Al-4V en Al7075-T6 is die twee lugvaartmateriale wat ondersoek is met behulp van die toetsopstelling. ŉ Omvattende eksperimentele studie is gedoen om die effek van die normaal krag op knaagslytasie en die wrywings gedrag van die lugvaartmateriale te ondersoek. Die eksperimente wat die ergste slytasie en hoogste wrywing getoon het, is herhaal vir 106 siklusse. Bykomende knaag eksperimente was ook tussen die twee lugvaartmateriale en sekere karbiede gedoen, aangesien karbiede tans as deklae in sommige lugvaart kontakte gebruik word. Die eksperimentele studie het getoon dat 'n afname in die normale krag gelei het tot 'n toename in wrywing vir beide lugvaartmateriale. Die bykomende knaagslytasie eksperimente op karbied metaal pare het getoon dat Ti-6Al-4V en Al7075-T6twee…

Advisors/Committee Members: Akdogan, G., Oosthuizen, G. A., Stellenbosch University. Faculty of Engineering. Dept. of Industrial Engineering..

Subjects/Keywords: Industrial engineering; Aerospace materials

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APA (6^th Edition):

Nortje, H. (2011). An investigation of fretting wear in aerospace applications. (Masters Thesis). Stellenbosch University. Retrieved from http://hdl.handle.net/10019.1/17851

Chicago Manual of Style (16^th Edition):

Nortje, Hermann. “An investigation of fretting wear in aerospace applications.” 2011. Masters Thesis, Stellenbosch University. Accessed March 08, 2021. http://hdl.handle.net/10019.1/17851.

MLA Handbook (7^th Edition):

Nortje, Hermann. “An investigation of fretting wear in aerospace applications.” 2011. Web. 08 Mar 2021.

Vancouver:

Nortje H. An investigation of fretting wear in aerospace applications. [Internet] [Masters thesis]. Stellenbosch University; 2011. [cited 2021 Mar 08]. Available from: http://hdl.handle.net/10019.1/17851.

Council of Science Editors:

Nortje H. An investigation of fretting wear in aerospace applications. [Masters Thesis]. Stellenbosch University; 2011. Available from: http://hdl.handle.net/10019.1/17851

Wichita State University

9. Nedukanjirathingal, Santhosh Kumar. Characterization of adhesives at room and elevated temperatures .

Degree: 2006, Wichita State University

URL: http://hdl.handle.net/10057/323

► Recent interest in advanced materials has paved the way for exploring joining options besides the traditional mechanical or thermal methods such as riveting or welding.… (more)

Subjects/Keywords: Aerospace materials

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

APA (6^th Edition):

Nedukanjirathingal, S. K. (2006). Characterization of adhesives at room and elevated temperatures . (Masters Thesis). Wichita State University. Retrieved from http://hdl.handle.net/10057/323

Chicago Manual of Style (16^th Edition):

Nedukanjirathingal, Santhosh Kumar. “Characterization of adhesives at room and elevated temperatures .” 2006. Masters Thesis, Wichita State University. Accessed March 08, 2021. http://hdl.handle.net/10057/323.

MLA Handbook (7^th Edition):

Nedukanjirathingal, Santhosh Kumar. “Characterization of adhesives at room and elevated temperatures .” 2006. Web. 08 Mar 2021.

Vancouver:

Nedukanjirathingal SK. Characterization of adhesives at room and elevated temperatures . [Internet] [Masters thesis]. Wichita State University; 2006. [cited 2021 Mar 08]. Available from: http://hdl.handle.net/10057/323.

Council of Science Editors:

Nedukanjirathingal SK. Characterization of adhesives at room and elevated temperatures . [Masters Thesis]. Wichita State University; 2006. Available from: http://hdl.handle.net/10057/323

Embry-Riddle Aeronautical University

10. Li, Jiukun. Mechanical and Electrical Characterization of Hybrid Carbon Nanotube Sheet-Graphene Nanocomposites for Sensing Applications.

Degree: MSin Aerospace Engineering, Graduate Studies, 2016, Embry-Riddle Aeronautical University

URL: https://commons.erau.edu/edt/223

► The unique mechanical and electrical properties of carbon nanotubes and graphitic structures have drawn extensive attention from researchers over the past two decades. The… (more)

Subjects/Keywords: Aerospace Engineering; Structural Materials

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APA (6^th Edition):

Li, J. (2016). Mechanical and Electrical Characterization of Hybrid Carbon Nanotube Sheet-Graphene Nanocomposites for Sensing Applications. (Masters Thesis). Embry-Riddle Aeronautical University. Retrieved from https://commons.erau.edu/edt/223

Chicago Manual of Style (16^th Edition):

Li, Jiukun. “Mechanical and Electrical Characterization of Hybrid Carbon Nanotube Sheet-Graphene Nanocomposites for Sensing Applications.” 2016. Masters Thesis, Embry-Riddle Aeronautical University. Accessed March 08, 2021. https://commons.erau.edu/edt/223.

MLA Handbook (7^th Edition):

Li, Jiukun. “Mechanical and Electrical Characterization of Hybrid Carbon Nanotube Sheet-Graphene Nanocomposites for Sensing Applications.” 2016. Web. 08 Mar 2021.

Vancouver:

Li J. Mechanical and Electrical Characterization of Hybrid Carbon Nanotube Sheet-Graphene Nanocomposites for Sensing Applications. [Internet] [Masters thesis]. Embry-Riddle Aeronautical University; 2016. [cited 2021 Mar 08]. Available from: https://commons.erau.edu/edt/223.

Council of Science Editors:

Li J. Mechanical and Electrical Characterization of Hybrid Carbon Nanotube Sheet-Graphene Nanocomposites for Sensing Applications. [Masters Thesis]. Embry-Riddle Aeronautical University; 2016. Available from: https://commons.erau.edu/edt/223

University of Limerick

11. O'Dwyer, Donal John. Investigation of microscale damage processes near adhesive-composite interfaces.

Degree: 2013, University of Limerick

URL: http://hdl.handle.net/10344/4551

►

peer-reviewed

The increasing use of composite materials in the aerospace industry has necessitated significant advancements in the prediction of damage in composite structures. Adhesive joints… (more)

▼

peer-reviewed

The increasing use of composite materials in the aerospace industry has necessitated significant advancements in the prediction of damage in composite structures. Adhesive joints have recently become more widespread, as such joints offer key advantages over bolted joints, such as causing no damage during hole drilling and providing weight savings. Adhesive joints however, fail catastrophically. To advance the understanding of failure of composite adhesive joints, the problem is approached at the microscale to investigate the fundamental damage processes. Testing ofminiature adhesive joints (Lapped area: 5mm× 7mm) has been carried out using a micro tensile testing apparatus in an SEM chamber. Video recordings of the tests allowexamination of the evolution of damage processes during joint failure. Samples are tested underMode I dominant andMode II conditions. SEMimages of the post failure appearance of the failure surface are presented and failure mechanisms under Mode I and Mode II conditions are compared in the context of the ASTM standard for adhesive joint assessment. In conjunction with the experimental tests, a micromechanical finite element model of the interface region between a composite adherend and adhesive layer has been developed. An existing two-dimensional microscale RVE damage model is extended into three-dimensions, where accurate stress-strain response in comparison to experimental data is shown. Parameter studies onMode I andMode II strength at the fibre-matrix interface found that the Mode II interfacial strength had a negligible effect on the response of the RVE under loading in the transverse plane. The ply model is extended to represent the first ply and half of the adhesive region of an adhesive composite joint. The ply model is separated from an elastic-plastic adhesive layer using damageable cohesive elements. Parameter studies under Mode I and Mode II conditions were undertaken to demonstrate the ability of the model to reproduce the failure appearance of the joints in the experimental tests. Under Mode I conditions, bonds failed in both the adherend and adhesive, while under Mode II conditions, failure occurred exclusively at the adhesive-adherend interface. The damage parameters of the adhesive layer RVE are incorporated into a twodimensional global scale model through cohesive zone modelling. The results are compared with the experimental data. It was found that the microscale RVE underestimated the fracture energy of the experimental damage processes.

Advisors/Committee Members: McCarthy, Conor T., O'Dowd, Noel P., IRC.

Subjects/Keywords: composite materials; aerospace industry

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APA (6^th Edition):

O'Dwyer, D. J. (2013). Investigation of microscale damage processes near adhesive-composite interfaces. (Thesis). University of Limerick. Retrieved from http://hdl.handle.net/10344/4551

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):

O'Dwyer, Donal John. “Investigation of microscale damage processes near adhesive-composite interfaces.” 2013. Thesis, University of Limerick. Accessed March 08, 2021. http://hdl.handle.net/10344/4551.

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

MLA Handbook (7^th Edition):

O'Dwyer, Donal John. “Investigation of microscale damage processes near adhesive-composite interfaces.” 2013. Web. 08 Mar 2021.

Vancouver:

O'Dwyer DJ. Investigation of microscale damage processes near adhesive-composite interfaces. [Internet] [Thesis]. University of Limerick; 2013. [cited 2021 Mar 08]. Available from: http://hdl.handle.net/10344/4551.

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

Council of Science Editors:

O'Dwyer DJ. Investigation of microscale damage processes near adhesive-composite interfaces. [Thesis]. University of Limerick; 2013. Available from: http://hdl.handle.net/10344/4551

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

University of Cincinnati

12. Selvaraj, Sudharshan. Use of CFD to Validate and Predict the Jet Noise from a High Aspect-ratio Nozzle at Off-design Conditions.

Degree: MS, Engineering and Applied Science: Aerospace Engineering, 2020, University of Cincinnati

URL: http://rave.ohiolink.edu/etdc/view?acc_num=ucin1595850094240426

► The objective of this work is to highlight and ascertain the significance of high aspect ratio nozzle studies through Computational Fluid Dynamics (CFD) as a… (more)

Subjects/Keywords: Aerospace Materials; CAA; Aero-acoustics

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APA (6^th Edition):

Selvaraj, S. (2020). Use of CFD to Validate and Predict the Jet Noise from a High Aspect-ratio Nozzle at Off-design Conditions. (Masters Thesis). University of Cincinnati. Retrieved from http://rave.ohiolink.edu/etdc/view?acc_num=ucin1595850094240426

Chicago Manual of Style (16^th Edition):

Selvaraj, Sudharshan. “Use of CFD to Validate and Predict the Jet Noise from a High Aspect-ratio Nozzle at Off-design Conditions.” 2020. Masters Thesis, University of Cincinnati. Accessed March 08, 2021. http://rave.ohiolink.edu/etdc/view?acc_num=ucin1595850094240426.

MLA Handbook (7^th Edition):

Selvaraj, Sudharshan. “Use of CFD to Validate and Predict the Jet Noise from a High Aspect-ratio Nozzle at Off-design Conditions.” 2020. Web. 08 Mar 2021.

Vancouver:

Selvaraj S. Use of CFD to Validate and Predict the Jet Noise from a High Aspect-ratio Nozzle at Off-design Conditions. [Internet] [Masters thesis]. University of Cincinnati; 2020. [cited 2021 Mar 08]. Available from: http://rave.ohiolink.edu/etdc/view?acc_num=ucin1595850094240426.

Council of Science Editors:

Selvaraj S. Use of CFD to Validate and Predict the Jet Noise from a High Aspect-ratio Nozzle at Off-design Conditions. [Masters Thesis]. University of Cincinnati; 2020. Available from: http://rave.ohiolink.edu/etdc/view?acc_num=ucin1595850094240426

The Ohio State University

13. Peterson, Brian. Energy Dispersive Spectroscopy Characterization of Solute Segregation in Ti-6Al-4V.

Degree: MS, Materials Science and Engineering, 2011, The Ohio State University

URL: http://rave.ohiolink.edu/etdc/view?acc_num=osu1293718338

► Ti-6Al-4V, or Ti-6-4, remains the most widely used titanium alloy in the US market. There remains little or no work investigating the Energy Dispersive Spectroscopy… (more)

▼ Ti-6Al-4V, or Ti-6-4, remains the most widely used titanium alloy in the US market. There remains little or no work investigating the Energy Dispersive Spectroscopy (EDS) characterization of solute segregation in Ti-6-4 as a function of sample geometry. Specifically, there are limited investigations of reduced sample thickness and its effects on measured sample composition. Using a vertically oriented drop furnace, samples of α/β processed, mill anneal Ti-6-4 were held at temperatures of 954°, 899°C, 843°C, and 788°C followed by a water quench. The resulting microstructures contained primary equiaxed alpha (α) and martensitic, prior-β regions. EDS characterization of heat treated samples was conducted for bulk samples in the SEM, electropolished thin foil samples in the TEM, and samples thinned to 250-350nm in the focused ion beam (FIB) that were investigated at 12.5, 15, and 20 keV. Vanadium was the solute of interest for this analysis since it exhibits pronounced segregation between the primary α and prior-β regions, as illustrated by the pseudo-binary β isomorphous phase diagram for Ti-6-4. Generally, bulk SEM and thin foil TEM EDS analyses for vanadium concentration were in good agreement with one another. However, a trend of decreasing aluminum concentration with increasing accelerating voltage was observed in the thinned SEM samples. Conversely, measured vanadium concentration increased with higher accelerating voltages. For the 954°C heat treatment, vanadium concentrations ranged from 0.3 to 0.9 wt.% for the α phase and from 2.7 to 3.1 wt.% in the prior-β regions. The 899°C heat treatment resulted in vanadium concentration ranges from 0.7 to 1.0 wt.% in the α and 4.3 to 4.5 wt.% in the prior-β region. The measured vanadium concentration for the 843°C heat treatment was between 0.7 to 1.3 wt.% for the α phase and from 4.9 to 5.3 wt.% in the prior-β. The 788°C heat treatment resulted in vanadium concentrations of 1.5 to 1.9 wt.% in the α and 8.6 to 9.6 wt.% in the prior-β region. Advisors/Committee Members: Fraser, Hamish (Advisor).

Subjects/Keywords: Aerospace Materials

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APA (6^th Edition):

Peterson, B. (2011). Energy Dispersive Spectroscopy Characterization of Solute Segregation in Ti-6Al-4V. (Masters Thesis). The Ohio State University. Retrieved from http://rave.ohiolink.edu/etdc/view?acc_num=osu1293718338

Chicago Manual of Style (16^th Edition):

Peterson, Brian. “Energy Dispersive Spectroscopy Characterization of Solute Segregation in Ti-6Al-4V.” 2011. Masters Thesis, The Ohio State University. Accessed March 08, 2021. http://rave.ohiolink.edu/etdc/view?acc_num=osu1293718338.

MLA Handbook (7^th Edition):

Peterson, Brian. “Energy Dispersive Spectroscopy Characterization of Solute Segregation in Ti-6Al-4V.” 2011. Web. 08 Mar 2021.

Vancouver:

Peterson B. Energy Dispersive Spectroscopy Characterization of Solute Segregation in Ti-6Al-4V. [Internet] [Masters thesis]. The Ohio State University; 2011. [cited 2021 Mar 08]. Available from: http://rave.ohiolink.edu/etdc/view?acc_num=osu1293718338.

Council of Science Editors:

Peterson B. Energy Dispersive Spectroscopy Characterization of Solute Segregation in Ti-6Al-4V. [Masters Thesis]. The Ohio State University; 2011. Available from: http://rave.ohiolink.edu/etdc/view?acc_num=osu1293718338

Edith Cowan University

14. Wild, Graham. Distributed optical fibre smart sensors for acoustic sensing in the structural health monitoring of robust aerospace vehicles.

Degree: 2010, Edith Cowan University

URL: https://ro.ecu.edu.au/theses/1873

► The use of distributed optical fibre smart sensors for the detection of acoustic signals in the Structural Health Monitoring (SHM) of robust aerospace vehicles has… (more)

▼ The use of distributed optical fibre smart sensors for the detection of acoustic signals in the Structural Health Monitoring (SHM) of robust aerospace vehicles has been demonstrated. Current distributed optical fibre sensors are multiplexed along a single fibre. Inherent problems exist with a multiplexed architecture. Two significant issues are; the possibility of fibre breakage, and the possibility of failure of the single transmitter, the single receiver, or the single processor. In a ‘smart’ architecture, the intelligence, as well as the sensors, is distributed. Hence, if destructive damage occurs, then the SHM system can continue to operate in all other locations on the vehicle, making the system robust. Work on the optical fibre sensors was limited to acoustic signals. This included acoustic emissions, acousto-ultrasonics, acoustic transmissions and other dynamic strain signals. Fibre Bragg Gratings (FBGs) were chosen as the optical fibre sensor for the detection of the acoustic signals. FBGs offer significant advantages over other types of optical fibre sensors. The most significant of these is the ease of multiplexing and their versatility, i.e. the ability of FBGs to detect a significant number of measurands. In the work on optical fibre sensing, we showed the implementation of an innovative detection system. This Transmit Reflect Detection System (TRDS) made use of both the transmitted and reflected signals from the FBG. The TRDS is an improvement on conventional power detection where either the transmitted or reflected component is used. The TRDS was used to successfully detect all types of dynamic and static signals, the most significant being the acoustic emission from a lead pencil break test. The use of the FBG sensor as a receiver for acoustic communications was also shown. Acoustic communications have been proposed for use in the SHM of robust aerospace vehicles with the use of autonomous agents, e.g. inspection or repair robots. The FBG receivers were compared with PZT receivers. When communicating through aluminium, the FBG performance was not as good as the PZT receiver, specifically due to the properties of the FBG which limit the frequency response. However, in Carbon Fibre Composites (CFC), the FBG outperformed the PZT due to the properties of the CFC. We also note that when contained within the thermal packaging the FBG had a very interesting frequency response, likely due to the suspended beam nature of the structure. This type of packaging could be used to tune the response of the FBG sensor. The work on the distributed optical fibre smart sensors showed the implementation of a Smart Transducer Interface Module (STIM), which used the TRDS with a Digital Signal Processor (DSP). The output of the TRDS was differentially amplified with a high speed amplifier, and the output was passed to the ADC onboard the DSP. The DSP was also used to toggle on and off output, including closed loop actuation, and controlling a 1550nm laser, which would represent the source used in the implemented system. The…

Subjects/Keywords: Aerospace vehicles; optical fibre; autonomous; Aerospace Engineering; Structures and Materials

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APA (6^th Edition):

Wild, G. (2010). Distributed optical fibre smart sensors for acoustic sensing in the structural health monitoring of robust aerospace vehicles. (Thesis). Edith Cowan University. Retrieved from https://ro.ecu.edu.au/theses/1873

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):

Wild, Graham. “Distributed optical fibre smart sensors for acoustic sensing in the structural health monitoring of robust aerospace vehicles.” 2010. Thesis, Edith Cowan University. Accessed March 08, 2021. https://ro.ecu.edu.au/theses/1873.

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

MLA Handbook (7^th Edition):

Wild, Graham. “Distributed optical fibre smart sensors for acoustic sensing in the structural health monitoring of robust aerospace vehicles.” 2010. Web. 08 Mar 2021.

Vancouver:

Wild G. Distributed optical fibre smart sensors for acoustic sensing in the structural health monitoring of robust aerospace vehicles. [Internet] [Thesis]. Edith Cowan University; 2010. [cited 2021 Mar 08]. Available from: https://ro.ecu.edu.au/theses/1873.

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

Council of Science Editors:

Wild G. Distributed optical fibre smart sensors for acoustic sensing in the structural health monitoring of robust aerospace vehicles. [Thesis]. Edith Cowan University; 2010. Available from: https://ro.ecu.edu.au/theses/1873

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

The Ohio State University

15. Rueger, Mathew Lee. An experimental investigation of the effect of vortex generators on the aerodynamic characteristics of a NACA 0021 airfoil undergoing large amplitude pitch oscillations.

Degree: MS, Aero/Astro Engineering, 1988, The Ohio State University

URL: http://rave.ohiolink.edu/etdc/view?acc_num=osu1407506629

Subjects/Keywords: Aerospace Engineering; Aerospace Materials

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APA (6^th Edition):

Rueger, M. L. (1988). An experimental investigation of the effect of vortex generators on the aerodynamic characteristics of a NACA 0021 airfoil undergoing large amplitude pitch oscillations. (Masters Thesis). The Ohio State University. Retrieved from http://rave.ohiolink.edu/etdc/view?acc_num=osu1407506629

Chicago Manual of Style (16^th Edition):

Rueger, Mathew Lee. “An experimental investigation of the effect of vortex generators on the aerodynamic characteristics of a NACA 0021 airfoil undergoing large amplitude pitch oscillations.” 1988. Masters Thesis, The Ohio State University. Accessed March 08, 2021. http://rave.ohiolink.edu/etdc/view?acc_num=osu1407506629.

MLA Handbook (7^th Edition):

Rueger, Mathew Lee. “An experimental investigation of the effect of vortex generators on the aerodynamic characteristics of a NACA 0021 airfoil undergoing large amplitude pitch oscillations.” 1988. Web. 08 Mar 2021.

Vancouver:

Rueger ML. An experimental investigation of the effect of vortex generators on the aerodynamic characteristics of a NACA 0021 airfoil undergoing large amplitude pitch oscillations. [Internet] [Masters thesis]. The Ohio State University; 1988. [cited 2021 Mar 08]. Available from: http://rave.ohiolink.edu/etdc/view?acc_num=osu1407506629.

Council of Science Editors:

Rueger ML. An experimental investigation of the effect of vortex generators on the aerodynamic characteristics of a NACA 0021 airfoil undergoing large amplitude pitch oscillations. [Masters Thesis]. The Ohio State University; 1988. Available from: http://rave.ohiolink.edu/etdc/view?acc_num=osu1407506629

University of Cincinnati

16. Holsinger, Seth D. Multiple Target Tracking Via Dynamic Point Clustering on a UAV Platform.

Degree: MS, Engineering and Applied Science: Aerospace Engineering, 2019, University of Cincinnati

URL: http://rave.ohiolink.edu/etdc/view?acc_num=ucin1552380066855365

► This research focuses on solving the problem of tracking multiple ground targets from a single or multiple UAV's utilizing a dynamic clustering algorithm. Each UAV… (more)

Subjects/Keywords: Aerospace Materials; Aerospace; Coordination; UAV; Autonomous; Intelligent Systems

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APA (6^th Edition):

Holsinger, S. D. (2019). Multiple Target Tracking Via Dynamic Point Clustering on a UAV Platform. (Masters Thesis). University of Cincinnati. Retrieved from http://rave.ohiolink.edu/etdc/view?acc_num=ucin1552380066855365

Chicago Manual of Style (16^th Edition):

Holsinger, Seth D. “Multiple Target Tracking Via Dynamic Point Clustering on a UAV Platform.” 2019. Masters Thesis, University of Cincinnati. Accessed March 08, 2021. http://rave.ohiolink.edu/etdc/view?acc_num=ucin1552380066855365.

MLA Handbook (7^th Edition):

Holsinger, Seth D. “Multiple Target Tracking Via Dynamic Point Clustering on a UAV Platform.” 2019. Web. 08 Mar 2021.

Vancouver:

Holsinger SD. Multiple Target Tracking Via Dynamic Point Clustering on a UAV Platform. [Internet] [Masters thesis]. University of Cincinnati; 2019. [cited 2021 Mar 08]. Available from: http://rave.ohiolink.edu/etdc/view?acc_num=ucin1552380066855365.

Council of Science Editors:

Holsinger SD. Multiple Target Tracking Via Dynamic Point Clustering on a UAV Platform. [Masters Thesis]. University of Cincinnati; 2019. Available from: http://rave.ohiolink.edu/etdc/view?acc_num=ucin1552380066855365

17. Chartosias, Marios. Argon-oxygen atmospheric pressure plasma treatment on carbon fiber reinforced polymer for improved bonding.

Degree: 2016, California State University, Long Beach

URL: http://pqdtopen.proquest.com/#viewpdf?dispub=1606056

► Acceptance of Carbon Fiber Reinforced Polymer (CFRP) structures requires a robust surface preparation method with improved process controls capable of ensuring high bond quality.… (more)

Subjects/Keywords: Aerospace engineering; Mechanical engineering; Materials science

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APA (6^th Edition):

Chartosias, M. (2016). Argon-oxygen atmospheric pressure plasma treatment on carbon fiber reinforced polymer for improved bonding. (Thesis). California State University, Long Beach. Retrieved from http://pqdtopen.proquest.com/#viewpdf?dispub=1606056

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):

Chartosias, Marios. “Argon-oxygen atmospheric pressure plasma treatment on carbon fiber reinforced polymer for improved bonding.” 2016. Thesis, California State University, Long Beach. Accessed March 08, 2021. http://pqdtopen.proquest.com/#viewpdf?dispub=1606056.

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

MLA Handbook (7^th Edition):

Chartosias, Marios. “Argon-oxygen atmospheric pressure plasma treatment on carbon fiber reinforced polymer for improved bonding.” 2016. Web. 08 Mar 2021.

Vancouver:

Chartosias M. Argon-oxygen atmospheric pressure plasma treatment on carbon fiber reinforced polymer for improved bonding. [Internet] [Thesis]. California State University, Long Beach; 2016. [cited 2021 Mar 08]. Available from: http://pqdtopen.proquest.com/#viewpdf?dispub=1606056.

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

Council of Science Editors:

Chartosias M. Argon-oxygen atmospheric pressure plasma treatment on carbon fiber reinforced polymer for improved bonding. [Thesis]. California State University, Long Beach; 2016. Available from: http://pqdtopen.proquest.com/#viewpdf?dispub=1606056

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

18. Francis, William H., IV. Mechanics of post-microbuckled compliant-matrix composites.

Degree: 2008, University of Colorado at Boulder

URL: http://pqdtopen.proquest.com/#viewpdf?dispub=1453575

► Shape memory materials are increasingly sought after to enable the design of unconventional structures, particularly in the aerospace community where deployable space structures and… (more)

▼ Shape memory materials are increasingly sought after to enable the design of unconventional structures, particularly in the aerospace community where deployable space structures and morphing aircraft have become important. These materials allow significant shape changes and spontaneously return to their original shape when triggered to do so. Shape memory polymer (SMP) is a well known class of these materials. A natural extension of shape memory polymer is elastic memory composite (EMC) which is, simply, SMP with fiber reinforcement. This material is very promising in that it inherits the very high strain capability and shape memory characteristics of the SMP and inherits high structural performance from the fiber reinforcement. When EMC is taken to elevated temperatures, where the shape-change and shape-recovery occurs, the SMP matrix behaves very elastomeric and linear. In this state, the fibers are slender columns on a compliant elastic foundation and buckle into highly uniform sinusoids when on the compression side of a bent EMC laminate. The buckling has a small characteristic wavelength (∼1mm) and is, therefore, termed microbuckling in the tradition of Walt Rosen. This is a fully elastic and recoverable deformation mode which allows fibers that normally fail at 1.5% compression strain to accommodate more than 10% composite compression strain. The seemingly obvious step of reinforcing shape memory polymer with fibers, therefore, results in a not-so-obvious synergistic relationship allowing a structurally efficient composite material, EMC, to endure very large deformations without degradation. The use of EMC is not yet wide-spread due, in part, to a lack of a fundamental understanding of its somewhat complex behavior in the elevated-temperature compliant-matrix state. However, the benefits of EMC would not be possible with a simple linear-elastic material and we must, therefore, increase our understanding. While the behavior of EMC in the rigid-matrix, straight-fiber state is understood with existing models; its highly nonlinear and somewhat complex behavior in the compliant-matrix post-microbuckled state cannot be understood with existing models. The following thesis is thus presented on the mechanics of post-microbuckled compliant-matrix composites.

Subjects/Keywords: Engineering, Aerospace; Engineering, Mechanical; Engineering, Materials Science

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APA (6^th Edition):

Francis, William H., I. (2008). Mechanics of post-microbuckled compliant-matrix composites. (Thesis). University of Colorado at Boulder. Retrieved from http://pqdtopen.proquest.com/#viewpdf?dispub=1453575

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):

Francis, William H., IV. “Mechanics of post-microbuckled compliant-matrix composites.” 2008. Thesis, University of Colorado at Boulder. Accessed March 08, 2021. http://pqdtopen.proquest.com/#viewpdf?dispub=1453575.

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

MLA Handbook (7^th Edition):

Francis, William H., IV. “Mechanics of post-microbuckled compliant-matrix composites.” 2008. Web. 08 Mar 2021.

Vancouver:

Francis, William H. I. Mechanics of post-microbuckled compliant-matrix composites. [Internet] [Thesis]. University of Colorado at Boulder; 2008. [cited 2021 Mar 08]. Available from: http://pqdtopen.proquest.com/#viewpdf?dispub=1453575.

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

Council of Science Editors:

Francis, William H. I. Mechanics of post-microbuckled compliant-matrix composites. [Thesis]. University of Colorado at Boulder; 2008. Available from: http://pqdtopen.proquest.com/#viewpdf?dispub=1453575

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

University of Washington

19. Kawakami, Hirohide. Lightning Strike Induced Damage Mechanisms of Carbon Fiber Composites.

Degree: 2012, University of Washington

URL: http://pqdtopen.proquest.com/#viewpdf?dispub=3501873

► Composite materials have a wide application in aerospace, automotive, and other transportation industries, because of the superior structural and weight performances. Since carbon fiber… (more)

▼ Composite materials have a wide application in aerospace, automotive, and other transportation industries, because of the superior structural and weight performances. Since carbon fiber reinforced polymer composites possess a much lower electrical conductivity as compared to traditional metallic materials utilized for aircraft structures, serious concern about damage resistance/tolerance against lightning has been rising. Main task of this study is to clarify the lightning damage mechanism of carbon fiber reinforced epoxy polymer composites to help further development of lightning strike protection. The research on lightning damage to carbon fiber reinforced polymer composites is quite challenging, and there has been little study available until now. In order to tackle this issue, building block approach was employed. The research was started with the development of supporting technologies such as a current impulse generator to simulate a lightning strike in a laboratory. Then, fundamental electrical properties and fracture behavior of CFRPs exposed to high and low level current impulse were investigated using simple coupon specimens, followed by extensive parametric investigations in terms of different prepreg materials frequently used in aerospace industry, various stacking sequences, different lightning intensity, and lightning current waveforms. It revealed that the thermal resistance capability of polymer matrix was one of the most influential parameters on lightning damage resistance of CFRPs. Based on the experimental findings, the semi-empirical analysis model for predicting the extent of lightning damage was established. The model was fitted through experimental data to determine empirical parameters and, then, showed a good capability to provide reliable predictions for other test conditions and materials. Finally, structural element level lightning tests were performed to explore more practical situations. Specifically, filled-hole CFRP plates and patch-repaired CFRP plates were selected as structural elements likely to be susceptible to lightning event. This study forms a solid foundation for the understanding of lightning damage mechanism of CFRPs, and become an important first step toward building a practical damage prediction tool of lighting event.

Subjects/Keywords: Engineering, Aerospace; Engineering, Mechanical; Engineering, Materials Science

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APA (6^th Edition):

Kawakami, H. (2012). Lightning Strike Induced Damage Mechanisms of Carbon Fiber Composites. (Thesis). University of Washington. Retrieved from http://pqdtopen.proquest.com/#viewpdf?dispub=3501873

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):

Kawakami, Hirohide. “Lightning Strike Induced Damage Mechanisms of Carbon Fiber Composites.” 2012. Thesis, University of Washington. Accessed March 08, 2021. http://pqdtopen.proquest.com/#viewpdf?dispub=3501873.

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

MLA Handbook (7^th Edition):

Kawakami, Hirohide. “Lightning Strike Induced Damage Mechanisms of Carbon Fiber Composites.” 2012. Web. 08 Mar 2021.

Vancouver:

Kawakami H. Lightning Strike Induced Damage Mechanisms of Carbon Fiber Composites. [Internet] [Thesis]. University of Washington; 2012. [cited 2021 Mar 08]. Available from: http://pqdtopen.proquest.com/#viewpdf?dispub=3501873.

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

Council of Science Editors:

Kawakami H. Lightning Strike Induced Damage Mechanisms of Carbon Fiber Composites. [Thesis]. University of Washington; 2012. Available from: http://pqdtopen.proquest.com/#viewpdf?dispub=3501873

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

20. Im, Se Hyuk. Wrinkling of elatic thin films on compliant substrates.

Degree: 2012, The University of Texas at Austin

URL: http://pqdtopen.proquest.com/#viewpdf?dispub=3543776

► Complex wrinkle patterns have been observed in various thin film systems, typically with integrated hard and soft materials for various technological applications as well… (more)

▼ Complex wrinkle patterns have been observed in various thin film systems, typically with integrated hard and soft materials for various technological applications as well as in nature. The underlying mechanism of wrinkling has been generally understood as a stress-driven instability. On an elastic substrate, equilibrium and energetics set the critical condition and select the wrinkle wavelength and amplitude. On a viscous substrate, wrinkles grow over time and kinetics select the dominant wavelength. More generally, on a viscoelastic substrate, both energetics and kinetics play important roles in determining the critical condition, the growth rate, and wrinkle patterns. The dynamics of wrinkling, while analogous to other phase ordering phenomena, is rich and distinct under the effects of a variety of stress conditions and nonlocal film-substrate interactions. In this study, a new mathematical model is developed for wrinkling of isotropic and anisotropic elastic films on viscoelastic substrates. Analytic solutions are obtained by a linear perturbation analysis and a nonlinear energy minimization method, which predict the kinetics of wrinkle growth at the initial stage and the equilibrium states at the long-time limit, respectively. In between, a power-law coarsening of the wrinkle wavelength is predicted by a scaling analysis. Numerical simulations confirm the analytical predictions and show diverse wrinkle patterns under various stress conditions. For isotropic elastic films, a transition from parallel wrinkles to zigzag patterns is predicted under anisotropic biaxial stresses. For cubic crystal films, the anisotropic elastic property leads to formation of orthogonal wrinkle patterns under equi-biaxial stresses. In general, the competition between the stress anisotropy and the material anisotropy controls the evolution of wrinkle patterns. Based on the mathematical model, two potential applications of the wrinkling phenomenon are explored, one for surface patterning and the other for estimating viscoelastic properties of thin polymer films. The theoretical and numerical results from this study are compared with experimental observations that are available in literature and through collaborations with experimental groups. The last chapter of this dissertation considers ratcheting-induced wrinkling for an elastic film on an elastoplastic substrate under cyclic temperatures, demonstrating an analogy between plastic ratcheting and viscous creep.

Subjects/Keywords: Engineering, Aerospace; Engineering, Mechanical; Engineering, Materials Science

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

APA (6^th Edition):

Im, S. H. (2012). Wrinkling of elatic thin films on compliant substrates. (Thesis). The University of Texas at Austin. Retrieved from http://pqdtopen.proquest.com/#viewpdf?dispub=3543776

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):

Im, Se Hyuk. “Wrinkling of elatic thin films on compliant substrates.” 2012. Thesis, The University of Texas at Austin. Accessed March 08, 2021. http://pqdtopen.proquest.com/#viewpdf?dispub=3543776.

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

MLA Handbook (7^th Edition):

Im, Se Hyuk. “Wrinkling of elatic thin films on compliant substrates.” 2012. Web. 08 Mar 2021.

Vancouver:

Im SH. Wrinkling of elatic thin films on compliant substrates. [Internet] [Thesis]. The University of Texas at Austin; 2012. [cited 2021 Mar 08]. Available from: http://pqdtopen.proquest.com/#viewpdf?dispub=3543776.

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

Council of Science Editors:

Im SH. Wrinkling of elatic thin films on compliant substrates. [Thesis]. The University of Texas at Austin; 2012. Available from: http://pqdtopen.proquest.com/#viewpdf?dispub=3543776

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

21. Datta, Supratik. Quasi-static characterization and modeling of the bending behavior of single crystal galfenol for magnetostrictive sensors and actuators.

Degree: 2009, University of Maryland, College Park

URL: http://pqdtopen.proquest.com/#viewpdf?dispub=3368942

► Iron-gallium alloys (Galfenol) are structural magnetostrictive materials that exhibit high free-strain at low magnetic fields, high stress-sensitivity and useful thermo-mechanical properties. Galfenol, like smart… (more)

▼ Iron-gallium alloys (Galfenol) are structural magnetostrictive materials that exhibit high free-strain at low magnetic fields, high stress-sensitivity and useful thermo-mechanical properties. Galfenol, like smart materials in general, is attractive for use as a dynamic actuator and/or sensor material and can hence find use in active shape and vibration control, real-time structural health monitoring and energy harvesting applications. Galfenol possesses significantly higher yield strength and greater ductility than most smart materials, which are generally limited to use under compressive loads. The unique structural attributes of Galfenol introduce opportunities for use of a smart material in applications that involve tension, bending, shear or torsion. A principal motivation for the research presented in this dissertation is that bending and shear loads lead to development of non-uniform stress and magnetic fields in Galfenol which introduce significantly more complexity to the considerations to be modeled, compared to modeling of purely axial loads. This dissertation investigates the magnetostrictive response of Galfenol under different stress and magnetic field conditions which is essential for understanding and modeling Galfenol’s behavior under bending, shear or torsion. Experimental data are used to calculate actuator and sensor figures of merit which can aid in design of adaptive structures. The research focuses on the bending behavior of Galfenol alloys as well as of laminated composites having Galfenol attached to other structural materials. A four-point bending test under magnetic field is designed, built and conducted on a Galfenol beam to understand its performance as a bending sensor. An extensive experimental study is conducted on Galfenol-Aluminum laminated composites to evaluate the effect of magnetic field, bending moment and Galfenol-Aluminum thickness ratio on actuation and sensing performance. A generalized recursive algorithm is presented for non-linear modeling of smart structures. This approach is used to develop a magnetomechanical plate model (MMPM) for laminated magnetostrictive composites. Both the actuation and sensing behavior of laminated magnetostrictive composites as predicted by the MMPM are compared with results from existing models and also with experimental data obtained from this research. It is shown that the MMPM predictions are able to capture the non-linear magnetomechanical behavior as well as the structural couplings in the composites. Model simulations are used to predict optimal actuator and sensor design criteria. A parameter is introduced to demarcate deformation regimes dominated by extension and bending. The MMPM results offer significant improvement over existing model predictions by better capturing the physics of the magnetomechanical coupled behavior.

Subjects/Keywords: Engineering, Aerospace; Engineering, Mechanical; Engineering, Materials Science

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

APA (6^th Edition):

Datta, S. (2009). Quasi-static characterization and modeling of the bending behavior of single crystal galfenol for magnetostrictive sensors and actuators. (Thesis). University of Maryland, College Park. Retrieved from http://pqdtopen.proquest.com/#viewpdf?dispub=3368942

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):

Datta, Supratik. “Quasi-static characterization and modeling of the bending behavior of single crystal galfenol for magnetostrictive sensors and actuators.” 2009. Thesis, University of Maryland, College Park. Accessed March 08, 2021. http://pqdtopen.proquest.com/#viewpdf?dispub=3368942.

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

MLA Handbook (7^th Edition):

Datta, Supratik. “Quasi-static characterization and modeling of the bending behavior of single crystal galfenol for magnetostrictive sensors and actuators.” 2009. Web. 08 Mar 2021.

Vancouver:

Datta S. Quasi-static characterization and modeling of the bending behavior of single crystal galfenol for magnetostrictive sensors and actuators. [Internet] [Thesis]. University of Maryland, College Park; 2009. [cited 2021 Mar 08]. Available from: http://pqdtopen.proquest.com/#viewpdf?dispub=3368942.

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

Council of Science Editors:

Datta S. Quasi-static characterization and modeling of the bending behavior of single crystal galfenol for magnetostrictive sensors and actuators. [Thesis]. University of Maryland, College Park; 2009. Available from: http://pqdtopen.proquest.com/#viewpdf?dispub=3368942

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

The University of Alabama

22. Guin, William Edward. Characterization of Reinforced Structural Composites with Carbon Nanotubes Grown Directly on the Fibers/Fabrics Using the PopTube Approach.

Degree: 2017, The University of Alabama

URL: http://pqdtopen.proquest.com/#viewpdf?dispub=10261968

► Carbon nanotubes (CNTs) are ideal candidates for the reinforcement of the matrix and interphase zone in polymer matrix composites (PMCs), due to their ability… (more)

▼ Carbon nanotubes (CNTs) are ideal candidates for the reinforcement of the matrix and interphase zone in polymer matrix composites (PMCs), due to their ability to more effectively bind the reinforcing fibers to the matrix material. This can lead to the enhancement of several critical composite properties – including interfacial shear strength and interlaminar fracture toughness – that are typically associated with a composite material’s resistance to delamination. Direct dispersion of CNTs into the matrix of the composites has been shown to be very difficult. A more effective way to reinforce PMCs using CNTs is to grow CNTs directly on the reinforcing fibers. To this end, a novel technique used to grow CNTs directly on carbon fibers has been developed at The University of Alabama and Auburn University. This method, referred to as the PopTube Approach, uses microwave irradiation to grow CNTs at room temperature in air, without the need for inert gas protection or additional feed stock gases. The simple nature of the PopTube Approach lends itself to large-scale, high-yield manufacturing that can be done in a cost effective manner. However, before this technique is developed beyond the laboratory scale, its effectiveness as a route to produce CNT-reinforced composites must be evaluated in a comprehensive manner. The objective of this work is to do just that – characterize the mechanical properties of CNT-reinforced composites produced via the PopTube Approach. A systematic experimental program is carried out to provide a comprehensive assessment of the effects of the PopTube Approach on a wide range of composite mechanical properties. Results show that the PopTube Approach provides for enhanced resistance to delamination with respect to several different loading events. Fractography studies are used to qualitatively understand the mechanisms responsible for these improvements in delamination resistance on the micro-scale. Results also suggest that improvements in delamination resistance via CNT reinforcement may come at the expense of the tensile properties of PMCs – which gives rise to the conclusion that in practice, the degree and manner of CNT reinforcement in PMCs should be carefully considered on an application-by-application basis. Together, the collection of studies performed herein provides a wide-ranging quantitative and qualitative assessment of the effects of the PopTube Approach CNT reinforcement scheme on the mechanical properties and behavior of polymer matrix composites.

Subjects/Keywords: Aerospace engineering; Civil engineering; Materials science

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

APA (6^th Edition):

Guin, W. E. (2017). Characterization of Reinforced Structural Composites with Carbon Nanotubes Grown Directly on the Fibers/Fabrics Using the PopTube Approach. (Thesis). The University of Alabama. Retrieved from http://pqdtopen.proquest.com/#viewpdf?dispub=10261968

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):

Guin, William Edward. “Characterization of Reinforced Structural Composites with Carbon Nanotubes Grown Directly on the Fibers/Fabrics Using the PopTube Approach.” 2017. Thesis, The University of Alabama. Accessed March 08, 2021. http://pqdtopen.proquest.com/#viewpdf?dispub=10261968.

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

MLA Handbook (7^th Edition):

Guin, William Edward. “Characterization of Reinforced Structural Composites with Carbon Nanotubes Grown Directly on the Fibers/Fabrics Using the PopTube Approach.” 2017. Web. 08 Mar 2021.

Vancouver:

Guin WE. Characterization of Reinforced Structural Composites with Carbon Nanotubes Grown Directly on the Fibers/Fabrics Using the PopTube Approach. [Internet] [Thesis]. The University of Alabama; 2017. [cited 2021 Mar 08]. Available from: http://pqdtopen.proquest.com/#viewpdf?dispub=10261968.

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

Council of Science Editors:

Guin WE. Characterization of Reinforced Structural Composites with Carbon Nanotubes Grown Directly on the Fibers/Fabrics Using the PopTube Approach. [Thesis]. The University of Alabama; 2017. Available from: http://pqdtopen.proquest.com/#viewpdf?dispub=10261968

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

23. Cervantes, Ignacio. Flexural retrofitting of reinforced concrete structures using Green Natural Fiber Reinforced Polymer plates.

Degree: 2014, California State University, Long Beach

URL: http://pqdtopen.proquest.com/#viewpdf?dispub=1527536

► An experimental study will be carried out to determine the suitability of Green Natural Fiber Reinforced Polymer plates (GNFRP) manufactured with hemp fibers, with… (more)

Subjects/Keywords: Engineering, Aerospace; Engineering, Civil; Engineering, Materials Science

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APA (6^th Edition):

Cervantes, I. (2014). Flexural retrofitting of reinforced concrete structures using Green Natural Fiber Reinforced Polymer plates. (Thesis). California State University, Long Beach. Retrieved from http://pqdtopen.proquest.com/#viewpdf?dispub=1527536

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):

Cervantes, Ignacio. “Flexural retrofitting of reinforced concrete structures using Green Natural Fiber Reinforced Polymer plates.” 2014. Thesis, California State University, Long Beach. Accessed March 08, 2021. http://pqdtopen.proquest.com/#viewpdf?dispub=1527536.

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

MLA Handbook (7^th Edition):

Cervantes, Ignacio. “Flexural retrofitting of reinforced concrete structures using Green Natural Fiber Reinforced Polymer plates.” 2014. Web. 08 Mar 2021.

Vancouver:

Cervantes I. Flexural retrofitting of reinforced concrete structures using Green Natural Fiber Reinforced Polymer plates. [Internet] [Thesis]. California State University, Long Beach; 2014. [cited 2021 Mar 08]. Available from: http://pqdtopen.proquest.com/#viewpdf?dispub=1527536.

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

Council of Science Editors:

Cervantes I. Flexural retrofitting of reinforced concrete structures using Green Natural Fiber Reinforced Polymer plates. [Thesis]. California State University, Long Beach; 2014. Available from: http://pqdtopen.proquest.com/#viewpdf?dispub=1527536

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

24. Gomez Consarnau, Rafael J. A Simplified Methodology for Validating the Hyper-Viscoelastic (HVE) Dynamic Response.

Degree: 2018, California State University, Long Beach

URL: http://pqdtopen.proquest.com/#viewpdf?dispub=10837944

► This thesis presents a mathematical modeling process for characterizing a hyperelastic material with viscous response under dynamic loading conditions. The model is designed with… (more)

Subjects/Keywords: Aerospace engineering; Mechanical engineering; Materials science

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APA (6^th Edition):

Gomez Consarnau, R. J. (2018). A Simplified Methodology for Validating the Hyper-Viscoelastic (HVE) Dynamic Response. (Thesis). California State University, Long Beach. Retrieved from http://pqdtopen.proquest.com/#viewpdf?dispub=10837944

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):

Gomez Consarnau, Rafael J. “A Simplified Methodology for Validating the Hyper-Viscoelastic (HVE) Dynamic Response.” 2018. Thesis, California State University, Long Beach. Accessed March 08, 2021. http://pqdtopen.proquest.com/#viewpdf?dispub=10837944.

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

MLA Handbook (7^th Edition):

Gomez Consarnau, Rafael J. “A Simplified Methodology for Validating the Hyper-Viscoelastic (HVE) Dynamic Response.” 2018. Web. 08 Mar 2021.

Vancouver:

Gomez Consarnau RJ. A Simplified Methodology for Validating the Hyper-Viscoelastic (HVE) Dynamic Response. [Internet] [Thesis]. California State University, Long Beach; 2018. [cited 2021 Mar 08]. Available from: http://pqdtopen.proquest.com/#viewpdf?dispub=10837944.

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

Council of Science Editors:

Gomez Consarnau RJ. A Simplified Methodology for Validating the Hyper-Viscoelastic (HVE) Dynamic Response. [Thesis]. California State University, Long Beach; 2018. Available from: http://pqdtopen.proquest.com/#viewpdf?dispub=10837944

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

West Virginia University

25. Weadon, Timothy L. A Force Sensor Array for Space Applications.

Degree: PhD, Mechanical and Aerospace Engineering, 2014, West Virginia University

URL: https://doi.org/10.33915/etd.628 ; https://researchrepository.wvu.edu/etd/628

► The need for force feedback and spatial awareness of contact in harsh environment applications, such as space servicing, has been unsatisfied due to the inability… (more)

▼ The need for force feedback and spatial awareness of contact in harsh environment applications, such as space servicing, has been unsatisfied due to the inability of current sensor technology to resist environmental effects. In this work, capacitive sensors based on a porous polymer-ceramic composite structure were evaluated for potential use in future operations within robotic end-effectors, withstanding temperatures ranging from -80 °C to 120 °C and forces up to 350 kPa. A thin-film design is utilized to allow for ease of embedding, allowing sensors to be implemented into exciting robotic hardware with minimal intrusion, and protecting sensors from electron bombardment, radiation, and point concentrations from metal-on-metal contact. Furthermore, said embedding is proposed to protect against environmental effects including electron bombardment, radiation, atomic oxygen, and damage caused by point concentrations during metal-on-metal contact.;The novel sensor design optimizes constituent properties to maximize the response and reduce background noise, hysteresis, and thermal and mechanical drift. Selection of continuants and design parameters is presented explicitly, including synthesis and preparation of necessary materials and execution of processing methods. Qualification of the design is achieved through thorough dynamic, quasi-static, and long term static thermomechancial loading schedules ranging from -80 to 120 ºC and 20 to 360 kPa with in-situ electrical acquisition. The final composition is also shown to meet necessary outgassing standards for in-orbit operations. Additional parameters are presented for selection of necessary substrate and electrode materials, further optimizing the applied technology.;An analytical model for pressure sensors is also constructed, predicting the capacitive response of a porous, polymer-ceramic composite under an applied pressure. Consisting of mechanical and dielectric counterparts, the iterative model is constructed in detail. The elastic modulus of the three-phase material is approximated by first considering only the polymer-ceramic composite mixture, and then incorporating porosity into the solid composite model. A new model has been developed for approximating the changing elastic modulus of porous polymers undergoing quasi-static compression, which induces the collapsing pores. Necessary material constants were obtained from experimental data published in literature. The permittivity of the paraelectric polymer matrix is modeled, accounting for piezodielectric effects imposed by external pressure and thermally induced stresses caused by substrate pinning. Similarly, the ferroelectric ceramic filler is modeled, considering changes in polarization caused by thermally induced phase transformations in the crystal structure. The final model is evaluated against experimental data, providing insight into composition and microstructure effects on the sensor response. Advisors/Committee Members: Edward M. Sabolsky, Darran Cairns, Thomas Evans.

Subjects/Keywords: Materials science; Aerospace engineering; Mechanical engineering

Record Details Similar Records Cite « Share

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APA (6^th Edition):

Weadon, T. L. (2014). A Force Sensor Array for Space Applications. (Doctoral Dissertation). West Virginia University. Retrieved from https://doi.org/10.33915/etd.628 ; https://researchrepository.wvu.edu/etd/628

Chicago Manual of Style (16^th Edition):

Weadon, Timothy L. “A Force Sensor Array for Space Applications.” 2014. Doctoral Dissertation, West Virginia University. Accessed March 08, 2021. https://doi.org/10.33915/etd.628 ; https://researchrepository.wvu.edu/etd/628.

MLA Handbook (7^th Edition):

Weadon, Timothy L. “A Force Sensor Array for Space Applications.” 2014. Web. 08 Mar 2021.

Vancouver:

Weadon TL. A Force Sensor Array for Space Applications. [Internet] [Doctoral dissertation]. West Virginia University; 2014. [cited 2021 Mar 08]. Available from: https://doi.org/10.33915/etd.628 ; https://researchrepository.wvu.edu/etd/628.

Council of Science Editors:

Weadon TL. A Force Sensor Array for Space Applications. [Doctoral Dissertation]. West Virginia University; 2014. Available from: https://doi.org/10.33915/etd.628 ; https://researchrepository.wvu.edu/etd/628

Embry-Riddle Aeronautical University

26. Gbaguidi, Audrey Jean-Miche. Piezoresistive Hybrid Nanocomposites for Strain and Damage Sensing: Experimental and Numerical Analysis.

Degree: PhD, Aerospace Engineering, 2020, Embry-Riddle Aeronautical University

URL: https://commons.erau.edu/edt/526

► Carbon nanomaterials such as carbon nanotubes (CNTs) and graphite nanoplatelets (GNPs) demonstrate remarkable electrical and mechanical properties, which suggest promising structural and functional applications… (more)

Subjects/Keywords: Aerospace Engineering; Materials Science and Engineering

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APA (6^th Edition):

Gbaguidi, A. J. (2020). Piezoresistive Hybrid Nanocomposites for Strain and Damage Sensing: Experimental and Numerical Analysis. (Doctoral Dissertation). Embry-Riddle Aeronautical University. Retrieved from https://commons.erau.edu/edt/526

Chicago Manual of Style (16^th Edition):

Gbaguidi, Audrey Jean-Miche. “Piezoresistive Hybrid Nanocomposites for Strain and Damage Sensing: Experimental and Numerical Analysis.” 2020. Doctoral Dissertation, Embry-Riddle Aeronautical University. Accessed March 08, 2021. https://commons.erau.edu/edt/526.

MLA Handbook (7^th Edition):

Gbaguidi, Audrey Jean-Miche. “Piezoresistive Hybrid Nanocomposites for Strain and Damage Sensing: Experimental and Numerical Analysis.” 2020. Web. 08 Mar 2021.

Vancouver:

Gbaguidi AJ. Piezoresistive Hybrid Nanocomposites for Strain and Damage Sensing: Experimental and Numerical Analysis. [Internet] [Doctoral dissertation]. Embry-Riddle Aeronautical University; 2020. [cited 2021 Mar 08]. Available from: https://commons.erau.edu/edt/526.

Council of Science Editors:

Gbaguidi AJ. Piezoresistive Hybrid Nanocomposites for Strain and Damage Sensing: Experimental and Numerical Analysis. [Doctoral Dissertation]. Embry-Riddle Aeronautical University; 2020. Available from: https://commons.erau.edu/edt/526

Embry-Riddle Aeronautical University

27. Selvadorai, Prathikshen Nambiar. Neural Network Fatigue Life Prediction in Steel I-Beams Using Mathematically Modeled Acoustic Emission Data.

Degree: MSin Aerospace Engineering, Graduate Studies, 2012, Embry-Riddle Aeronautical University

URL: https://commons.erau.edu/edt/129

► The purpose of this research is to predict fatigue cracking in metal beams using mathematically modeled acoustic emission (AE) data. The AE data was… (more)

Subjects/Keywords: Aerospace Engineering; Materials Science and Engineering

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APA (6^th Edition):

Selvadorai, P. N. (2012). Neural Network Fatigue Life Prediction in Steel I-Beams Using Mathematically Modeled Acoustic Emission Data. (Masters Thesis). Embry-Riddle Aeronautical University. Retrieved from https://commons.erau.edu/edt/129

Chicago Manual of Style (16^th Edition):

Selvadorai, Prathikshen Nambiar. “Neural Network Fatigue Life Prediction in Steel I-Beams Using Mathematically Modeled Acoustic Emission Data.” 2012. Masters Thesis, Embry-Riddle Aeronautical University. Accessed March 08, 2021. https://commons.erau.edu/edt/129.

MLA Handbook (7^th Edition):

Selvadorai, Prathikshen Nambiar. “Neural Network Fatigue Life Prediction in Steel I-Beams Using Mathematically Modeled Acoustic Emission Data.” 2012. Web. 08 Mar 2021.

Vancouver:

Selvadorai PN. Neural Network Fatigue Life Prediction in Steel I-Beams Using Mathematically Modeled Acoustic Emission Data. [Internet] [Masters thesis]. Embry-Riddle Aeronautical University; 2012. [cited 2021 Mar 08]. Available from: https://commons.erau.edu/edt/129.

Council of Science Editors:

Selvadorai PN. Neural Network Fatigue Life Prediction in Steel I-Beams Using Mathematically Modeled Acoustic Emission Data. [Masters Thesis]. Embry-Riddle Aeronautical University; 2012. Available from: https://commons.erau.edu/edt/129

Embry-Riddle Aeronautical University

28. Gbaguidi, Audrey J-M. Fatigue Damage Prognosis of Internal Delamination in Composite Plates Under Cyclic Compression Loadings Using Affine Arithmetic as Uncertainty Propagation Tool.

Degree: MSin Aerospace Engineering, Aerospace Engineering, 2014, Embry-Riddle Aeronautical University

URL: https://commons.erau.edu/edt/267

► Structural health monitoring (SHM) has become indispensable for reducing maintenance costs and increasing the in-service capacity of a structure. The increased use of lightweight… (more)

▼ Structural health monitoring (SHM) has become indispensable for reducing maintenance costs and increasing the in-service capacity of a structure. The increased use of lightweight composite materials in aircraft structures drastically increased the effects of fatigue induced damage on their critical structural components and thus the necessity to predict the remaining life of those components. Damage prognosis, one of the least investigated fields in SHM, uses the current damage state of the system to forecast its future performance by estimating the expected loading environments. A successful damage prediction model requires the integration of technologies in areas like measurements, materials science, mechanics of materials, and probability theories, but most importantly the quantification of uncertainty in all these areas. In this study, Affine Arithmetic is used as a method for incorporating the uncertainties due to the material properties into the fatigue life prognosis of composite plants subjected to cyclic compressive loadings. When loadings are compressive in nature, the composite plates undergo repeated buckling-unloading of the delaminated layer which induces mixed modes I and II states of stress at the tip of the delamination in the plates. The Kardomateas model-based prediction law is used to predict the growth of the delamination, while the integration of the effects of the uncertainties for modes I and II coefficients in the fatigue life prediction model is handled using Affine Arithmetic. The Mode I and Mode II interlaminar fracture toughness and fatigue characterization of the composite plates are first experimentally studied to obtain the material coefficients and fracture toughness, respectively. Next, these obtained coefficients are used in the Kardomateas law to predict the delamination lengths in the composite plates while using Affine Arithmetic to handle their uncertainties. At last, the fatigue characterization of the composite plates during compressive-buckling loadings in experimentally studied, and the delamination lengths are compared with the predicted values to check the performance of Affine Arithmetic as an uncertainty propagation tool.

Subjects/Keywords: Aerospace Engineering; Materials Science and Engineering

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

APA (6^th Edition):

Gbaguidi, A. J. (2014). Fatigue Damage Prognosis of Internal Delamination in Composite Plates Under Cyclic Compression Loadings Using Affine Arithmetic as Uncertainty Propagation Tool. (Masters Thesis). Embry-Riddle Aeronautical University. Retrieved from https://commons.erau.edu/edt/267

Chicago Manual of Style (16^th Edition):

Gbaguidi, Audrey J-M. “Fatigue Damage Prognosis of Internal Delamination in Composite Plates Under Cyclic Compression Loadings Using Affine Arithmetic as Uncertainty Propagation Tool.” 2014. Masters Thesis, Embry-Riddle Aeronautical University. Accessed March 08, 2021. https://commons.erau.edu/edt/267.

MLA Handbook (7^th Edition):

Gbaguidi, Audrey J-M. “Fatigue Damage Prognosis of Internal Delamination in Composite Plates Under Cyclic Compression Loadings Using Affine Arithmetic as Uncertainty Propagation Tool.” 2014. Web. 08 Mar 2021.

Vancouver:

Gbaguidi AJ. Fatigue Damage Prognosis of Internal Delamination in Composite Plates Under Cyclic Compression Loadings Using Affine Arithmetic as Uncertainty Propagation Tool. [Internet] [Masters thesis]. Embry-Riddle Aeronautical University; 2014. [cited 2021 Mar 08]. Available from: https://commons.erau.edu/edt/267.

Council of Science Editors:

Gbaguidi AJ. Fatigue Damage Prognosis of Internal Delamination in Composite Plates Under Cyclic Compression Loadings Using Affine Arithmetic as Uncertainty Propagation Tool. [Masters Thesis]. Embry-Riddle Aeronautical University; 2014. Available from: https://commons.erau.edu/edt/267

Embry-Riddle Aeronautical University

29. Rudradat, Shivani A. Investigation into the Effects of Wire Mesh on Tensile and Impact Properties of Fiber Metal Laminates.

Degree: MSin Aerospace Engineering, Aerospace Engineering, 2013, Embry-Riddle Aeronautical University

URL: https://commons.erau.edu/edt/126

► An investigational study was conducted into the tensile and impact behavior of Fiber Metal Laminates by combining 5052 alumintrm mesh or2024-T3 aluminum sheets,2.47 N… (more)

Subjects/Keywords: Aerospace Engineering; Materials Science and Engineering

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

APA (6^th Edition):

Rudradat, S. A. (2013). Investigation into the Effects of Wire Mesh on Tensile and Impact Properties of Fiber Metal Laminates. (Masters Thesis). Embry-Riddle Aeronautical University. Retrieved from https://commons.erau.edu/edt/126

Chicago Manual of Style (16^th Edition):

Rudradat, Shivani A. “Investigation into the Effects of Wire Mesh on Tensile and Impact Properties of Fiber Metal Laminates.” 2013. Masters Thesis, Embry-Riddle Aeronautical University. Accessed March 08, 2021. https://commons.erau.edu/edt/126.

MLA Handbook (7^th Edition):

Rudradat, Shivani A. “Investigation into the Effects of Wire Mesh on Tensile and Impact Properties of Fiber Metal Laminates.” 2013. Web. 08 Mar 2021.

Vancouver:

Rudradat SA. Investigation into the Effects of Wire Mesh on Tensile and Impact Properties of Fiber Metal Laminates. [Internet] [Masters thesis]. Embry-Riddle Aeronautical University; 2013. [cited 2021 Mar 08]. Available from: https://commons.erau.edu/edt/126.

Council of Science Editors:

Rudradat SA. Investigation into the Effects of Wire Mesh on Tensile and Impact Properties of Fiber Metal Laminates. [Masters Thesis]. Embry-Riddle Aeronautical University; 2013. Available from: https://commons.erau.edu/edt/126

Embry-Riddle Aeronautical University

30. Chava, Sandeep. Detecting Delamination in Carbon Fiber Composites Using Piezoresistive Nanocomposites.

Degree: MSin Aerospace Engineering, Graduate Studies, 2016, Embry-Riddle Aeronautical University

URL: https://commons.erau.edu/edt/204

► Carbon fiber prepreg composites are utilized successfully as structural materials for different lightweight aerospace applications. Delamination is a critical failure mode in these composite… (more)

Subjects/Keywords: Aerospace Engineering; Materials Science and Engineering

Record Details Similar Records Cite « Share

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

APA (6^th Edition):

Chava, S. (2016). Detecting Delamination in Carbon Fiber Composites Using Piezoresistive Nanocomposites. (Masters Thesis). Embry-Riddle Aeronautical University. Retrieved from https://commons.erau.edu/edt/204

Chicago Manual of Style (16^th Edition):

Chava, Sandeep. “Detecting Delamination in Carbon Fiber Composites Using Piezoresistive Nanocomposites.” 2016. Masters Thesis, Embry-Riddle Aeronautical University. Accessed March 08, 2021. https://commons.erau.edu/edt/204.

MLA Handbook (7^th Edition):

Chava, Sandeep. “Detecting Delamination in Carbon Fiber Composites Using Piezoresistive Nanocomposites.” 2016. Web. 08 Mar 2021.

Vancouver:

Chava S. Detecting Delamination in Carbon Fiber Composites Using Piezoresistive Nanocomposites. [Internet] [Masters thesis]. Embry-Riddle Aeronautical University; 2016. [cited 2021 Mar 08]. Available from: https://commons.erau.edu/edt/204.

Council of Science Editors:

Chava S. Detecting Delamination in Carbon Fiber Composites Using Piezoresistive Nanocomposites. [Masters Thesis]. Embry-Riddle Aeronautical University; 2016. Available from: https://commons.erau.edu/edt/204

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