subject:(Plane stress)

NSYSU

1. Chang, Chu-ya. Investigation polarization property of m-plane nitrides by Raman and photoluminescence.

Degree: Master, Physics, 2011, NSYSU

URL: http://etd.lib.nsysu.edu.tw/ETD-db/ETD-search/view_etd?URN=etd-0823111-145558

► The samples this thesis investigated were m-plane nitrides films grown on m-plane sapphire by plasma-assisted molecular beam epitaxy (PAMBE). Scanning electron microscopy (SEM) images revealed… (more)

Subjects/Keywords: stress; polarization dependent PL; sapphire; PAMBE; m-plane

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APA (6^th Edition):

Chang, C. (2011). Investigation polarization property of m-plane nitrides by Raman and photoluminescence. (Thesis). NSYSU. Retrieved from http://etd.lib.nsysu.edu.tw/ETD-db/ETD-search/view_etd?URN=etd-0823111-145558

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):

Chang, Chu-ya. “Investigation polarization property of m-plane nitrides by Raman and photoluminescence.” 2011. Thesis, NSYSU. Accessed December 12, 2019. http://etd.lib.nsysu.edu.tw/ETD-db/ETD-search/view_etd?URN=etd-0823111-145558.

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

MLA Handbook (7^th Edition):

Chang, Chu-ya. “Investigation polarization property of m-plane nitrides by Raman and photoluminescence.” 2011. Web. 12 Dec 2019.

Vancouver:

Chang C. Investigation polarization property of m-plane nitrides by Raman and photoluminescence. [Internet] [Thesis]. NSYSU; 2011. [cited 2019 Dec 12]. Available from: http://etd.lib.nsysu.edu.tw/ETD-db/ETD-search/view_etd?URN=etd-0823111-145558.

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

Council of Science Editors:

Chang C. Investigation polarization property of m-plane nitrides by Raman and photoluminescence. [Thesis]. NSYSU; 2011. Available from: http://etd.lib.nsysu.edu.tw/ETD-db/ETD-search/view_etd?URN=etd-0823111-145558

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

University of Newcastle

2. Guo, Jie. Investigation of arching behaviour under surcharge pressure in mass-flow bins and stress states at hopper/feeder interface.

Degree: PhD, 2014, University of Newcastle

URL: http://hdl.handle.net/1959.13/1047959

►

Research Doctorate - Doctor of Philosophy (PhD)

Since the era of industrialization, the handling of materials in bulk form has become a necessary process for… (more)

▼

Research Doctorate - Doctor of Philosophy (PhD)

Since the era of industrialization, the handling of materials in bulk form has become a necessary process for a range of industries throughout the world. Bulk handling and storage facilities should be designed and operated to obtain both maximum reliability and efficiency as well as encourage economy. A better understanding of the stress field and arching behavior and an accurate assessment of the bin wall pressure are essential steps to achieving reliable design of the storage bins or the feeder system. To date, the determination of the critical mass-flow hopper opening dimensions to prevent blockages due to the formation of stable, cohesive arches has been based on the radial stress field generated in the lower region of the hopper. The surcharge loads on the hopper have not been taken into account. Non-linear effects caused by the hopper surcharge loads in mass-flow analysis need to be addressed. In this study, a large number of experiments were conducted to investigate the influence of the surcharge pressure and the filling level on the hopper wall pressure during arching. The failure mechanism of the arches is discussed by means of studying the arch profile in the mass-flow hopper. In this study, to ensure efficient feeding, the hopper and feeder geometry are designed as an integral unit. The stress field at the hopper/feeder interface is of particular interest due to the role that it plays in estimating the feeder loads. In reality, the two-dimensional stress field assumed in the mass-flow hopper is influenced by the shear force due to the feeder operation. The combination of the active stress field and the passive stress field in the mass-flow hopper is suggested. This study also attempts to provide an accurate estimation of the feeder loads by investigating the feeder loads given by a combination of two methods. Apart from the comparisons between the experimental and theoretical results, numerical simulations using the discrete element method were carried out additionally to assist in the investigation of the hopper wall pressures and feeder loads. The influences of the various parameters on the hopper wall pressure, such as filling heights and outlet dimensions, are presented in this thesis. For the feeder system, the effects of the clearance between the hopper and feeder, the belt speed and other areas are also studied.

Advisors/Committee Members: University of Newcastle. Faculty of Engineering & Built Environment, School of Engineering.

Subjects/Keywords: arching behavior; plane-flow hopper; hopper/feeder interface; stress field

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APA (6^th Edition):

Guo, J. (2014). Investigation of arching behaviour under surcharge pressure in mass-flow bins and stress states at hopper/feeder interface. (Doctoral Dissertation). University of Newcastle. Retrieved from http://hdl.handle.net/1959.13/1047959

Chicago Manual of Style (16^th Edition):

Guo, Jie. “Investigation of arching behaviour under surcharge pressure in mass-flow bins and stress states at hopper/feeder interface.” 2014. Doctoral Dissertation, University of Newcastle. Accessed December 12, 2019. http://hdl.handle.net/1959.13/1047959.

MLA Handbook (7^th Edition):

Guo, Jie. “Investigation of arching behaviour under surcharge pressure in mass-flow bins and stress states at hopper/feeder interface.” 2014. Web. 12 Dec 2019.

Vancouver:

Guo J. Investigation of arching behaviour under surcharge pressure in mass-flow bins and stress states at hopper/feeder interface. [Internet] [Doctoral dissertation]. University of Newcastle; 2014. [cited 2019 Dec 12]. Available from: http://hdl.handle.net/1959.13/1047959.

Council of Science Editors:

Guo J. Investigation of arching behaviour under surcharge pressure in mass-flow bins and stress states at hopper/feeder interface. [Doctoral Dissertation]. University of Newcastle; 2014. Available from: http://hdl.handle.net/1959.13/1047959

University of Southern California

3. Teng, LiPing Lily. Scattering and diffraction of anti-plane (SH) elastic waves by parabolic surface topographies.

Degree: PhD, Civil Engineering, 2012, University of Southern California

URL: http://digitallibrary.usc.edu/cdm/compoundobject/collection/p15799coll3/id/82970/rec/5690

► Based on the previous studies of diffraction of SH wave, this thesis will extend the study to the diffraction of elastic SH wave through two… (more)

Subjects/Keywords: anti-plane (SH) wave; rotation and stress concentration factors; displacement

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APA (6^th Edition):

Teng, L. L. (2012). Scattering and diffraction of anti-plane (SH) elastic waves by parabolic surface topographies. (Doctoral Dissertation). University of Southern California. Retrieved from http://digitallibrary.usc.edu/cdm/compoundobject/collection/p15799coll3/id/82970/rec/5690

Chicago Manual of Style (16^th Edition):

Teng, LiPing Lily. “Scattering and diffraction of anti-plane (SH) elastic waves by parabolic surface topographies.” 2012. Doctoral Dissertation, University of Southern California. Accessed December 12, 2019. http://digitallibrary.usc.edu/cdm/compoundobject/collection/p15799coll3/id/82970/rec/5690.

MLA Handbook (7^th Edition):

Teng, LiPing Lily. “Scattering and diffraction of anti-plane (SH) elastic waves by parabolic surface topographies.” 2012. Web. 12 Dec 2019.

Vancouver:

Teng LL. Scattering and diffraction of anti-plane (SH) elastic waves by parabolic surface topographies. [Internet] [Doctoral dissertation]. University of Southern California; 2012. [cited 2019 Dec 12]. Available from: http://digitallibrary.usc.edu/cdm/compoundobject/collection/p15799coll3/id/82970/rec/5690.

Council of Science Editors:

Teng LL. Scattering and diffraction of anti-plane (SH) elastic waves by parabolic surface topographies. [Doctoral Dissertation]. University of Southern California; 2012. Available from: http://digitallibrary.usc.edu/cdm/compoundobject/collection/p15799coll3/id/82970/rec/5690

4. Moita, Gray Farias. Non-linear finite element analysis of continua with emphasis on hyperelasticity.

Degree: PhD, 1994, Imperial College London

URL: http://hdl.handle.net/10044/1/7943

Subjects/Keywords: 519; Plane stress; Plane strain; Co-rotation

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APA (6^th Edition):

Moita, G. F. (1994). Non-linear finite element analysis of continua with emphasis on hyperelasticity. (Doctoral Dissertation). Imperial College London. Retrieved from http://hdl.handle.net/10044/1/7943

Chicago Manual of Style (16^th Edition):

Moita, Gray Farias. “Non-linear finite element analysis of continua with emphasis on hyperelasticity.” 1994. Doctoral Dissertation, Imperial College London. Accessed December 12, 2019. http://hdl.handle.net/10044/1/7943.

MLA Handbook (7^th Edition):

Moita, Gray Farias. “Non-linear finite element analysis of continua with emphasis on hyperelasticity.” 1994. Web. 12 Dec 2019.

Vancouver:

Moita GF. Non-linear finite element analysis of continua with emphasis on hyperelasticity. [Internet] [Doctoral dissertation]. Imperial College London; 1994. [cited 2019 Dec 12]. Available from: http://hdl.handle.net/10044/1/7943.

Council of Science Editors:

Moita GF. Non-linear finite element analysis of continua with emphasis on hyperelasticity. [Doctoral Dissertation]. Imperial College London; 1994. Available from: http://hdl.handle.net/10044/1/7943

The Ohio State University

5. Kotian, Kunal. Detection of in-plane stress waves with Polyvinylidene Fluoride (PVDF) sensors.

Degree: MS, Mechanical Engineering, 2013, The Ohio State University

URL: http://rave.ohiolink.edu/etdc/view?acc_num=osu1357254821

► Polyvinylidene Fluoride (PVDF), a piezoelectric polymer, is an excellent stress sensor. The objective of this research is to investigate the application of the PVDF… (more)

Subjects/Keywords: Mechanical Engineering; PVDF sensor; in-plane stress; impact testing; stress wave detection; stress averaging; LS-DYNA impact simulation

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APA (6^th Edition):

Kotian, K. (2013). Detection of in-plane stress waves with Polyvinylidene Fluoride (PVDF) sensors. (Masters Thesis). The Ohio State University. Retrieved from http://rave.ohiolink.edu/etdc/view?acc_num=osu1357254821

Chicago Manual of Style (16^th Edition):

Kotian, Kunal. “Detection of in-plane stress waves with Polyvinylidene Fluoride (PVDF) sensors.” 2013. Masters Thesis, The Ohio State University. Accessed December 12, 2019. http://rave.ohiolink.edu/etdc/view?acc_num=osu1357254821.

MLA Handbook (7^th Edition):

Kotian, Kunal. “Detection of in-plane stress waves with Polyvinylidene Fluoride (PVDF) sensors.” 2013. Web. 12 Dec 2019.

Vancouver:

Kotian K. Detection of in-plane stress waves with Polyvinylidene Fluoride (PVDF) sensors. [Internet] [Masters thesis]. The Ohio State University; 2013. [cited 2019 Dec 12]. Available from: http://rave.ohiolink.edu/etdc/view?acc_num=osu1357254821.

Council of Science Editors:

Kotian K. Detection of in-plane stress waves with Polyvinylidene Fluoride (PVDF) sensors. [Masters Thesis]. The Ohio State University; 2013. Available from: http://rave.ohiolink.edu/etdc/view?acc_num=osu1357254821

University of Florida

6. Yalamanchili, Vijay Krishna. Topology Optimization of Structures Using Global Stress Measure.

Degree: MS, Mechanical Engineering - Mechanical and Aerospace Engineering, 2012, University of Florida

URL: http://ufdc.ufl.edu/UFE0044267

► Topology optimization is a mathematical approach to determine the optimal distribution of material within a given design space. Minimization of compliance for a given mass… (more)

▼ Topology optimization is a mathematical approach to determine the optimal distribution of material within a given design space. Minimization of compliance for a given mass has been the predominant method of designing structures using topology optimization. Minimization of compliance is equivalent to maximizing the stiffness of the structure and mostly results in structures with approximately uniform stresses. In most cases, a design with the lowest compliance is not always the same as the design with the lowest maximum stress and the amount of material that can be removed before stresses exceed the stress limits is often not known. Stress is the most important consideration from a structural designer's viewpoint and stress based topology optimization which minimizes the mass would be a better choice. However due to challenges such as singularity and localized stresses the problem has not been solved completely. In this thesis, we propose an effective and low cost (computational cost) method of imposing stress constraints on continuum structures using a conservative global stress measure. The shape is defined using a shape density function and the contours of this density corresponding to a threshold value (0.5) are defined as the boundaries of the design. The nodal values of shape density have been treated as the design variables and smooth density functions are obtained by interpolating the nodal values of density. Solid Isotropic Material with Penalization (SIMP) has been used to force the density towards 0 or 1. A relation is established between the mean compliance and Von-Mises stress. Von Mises stress in the stress constraints is approximated by an equivalent compliance term. An expression which represents global stress measure is obtained by integrating special functions of local stress violations. This expression is added to the mass of the structure to obtain the objective function. The optimization problem is then solved using Moving Barrier Method (MBM) to obtain the optimal design. Results indicate that this approach works well in the absence of highly localized stresses. ( en ) Advisors/Committee Members: Kumar, Ashok V (committee chair), Kim, Nam Ho (committee member), Haftka, Raphael T (committee member).

Subjects/Keywords: Data smoothing; Design optimization; Linear programming; Objective functions; Plane stress; Shape optimization; Stress distribution; Stress functions; Stress relaxation; Topology; constraints – global – optimization – stress – topology

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APA (6^th Edition):

Yalamanchili, V. K. (2012). Topology Optimization of Structures Using Global Stress Measure. (Masters Thesis). University of Florida. Retrieved from http://ufdc.ufl.edu/UFE0044267

Chicago Manual of Style (16^th Edition):

Yalamanchili, Vijay Krishna. “Topology Optimization of Structures Using Global Stress Measure.” 2012. Masters Thesis, University of Florida. Accessed December 12, 2019. http://ufdc.ufl.edu/UFE0044267.

MLA Handbook (7^th Edition):

Yalamanchili, Vijay Krishna. “Topology Optimization of Structures Using Global Stress Measure.” 2012. Web. 12 Dec 2019.

Vancouver:

Yalamanchili VK. Topology Optimization of Structures Using Global Stress Measure. [Internet] [Masters thesis]. University of Florida; 2012. [cited 2019 Dec 12]. Available from: http://ufdc.ufl.edu/UFE0044267.

Council of Science Editors:

Yalamanchili VK. Topology Optimization of Structures Using Global Stress Measure. [Masters Thesis]. University of Florida; 2012. Available from: http://ufdc.ufl.edu/UFE0044267

University of Lund

7. Athanasopoulos, Stefanos. Multiscale granular mechanics: A neutron diffraction based experimental approach.

Degree: 2019, University of Lund

URL: http://lup.lub.lu.se/record/8025d4a3-c028-4b28-891a-5b4f6b3e14f2 ; http://portal.research.lu.se/ws/files/69618862/ThesisStefanosAthanasopoulos.pdf

► Granular media (i.e., assemblies of grains, containing voids), such as sand, are highly complex materials, possessing inherently heterogeneous structure and properties that are manifested by… (more)

▼ Granular media (i.e., assemblies of grains, containing voids), such as sand, are highly complex materials, possessing inherently heterogeneous structure and properties that are manifested by the mobility and interaction of their constituent particles. Despite having been widely studied for centuries (i.e., the study of granular media in modern science essentially begins with the work of Charles-Augustin de Coulomb on sand, in 1776), there still exist key pieces of information regarding their (micro-)mechanical behaviour that have been largely eluding the scientific community. More specifically, under the effect of applied stress, these materials exhibit highly inhomogeneous mechanical behaviours, indicating varying and evolving local stress-strain relationships. As far as the strain is concerned, over the past decades, increasingly fine details have been revealed into the underlying grain-scale mechanisms, the origins of heterogeneous behaviour, including localisation, and how these lead to macroscopic material failure. However, details on the evolution of force/stress distribution are a key, missing piece of information and to be understood, requires appropriate, spatially-resolved local measurements.This thesis presents a novel, multiscale experimental approach, to characterise quantitatively the (micro-)structural evolution of granular media during loading, by associating traditional macroscale boundary measurements with microscale information acquired by neutron diffraction (ND), as well as digital image correlation (DIC), at a mesoscale in between. The ND method provides mapping of the distribution of stresses throughout the granular skeleton of the material, by inference from measured crystallographic strains of the grains, whilst DIC provides the complementary total strain field mapping, opening the possibility for local stress-strain analysis. A key component that enabled this novel approach is the development of a new, specially designed plane-strain loading apparatus. A series of experiments was realised with this apparatus, demonstrating the potential of the experimental approach through combined stress and strain mapping. These experimental developments also highlighted the need for appropriate, reference ND measurements for granular media, for the effective employment of the ND method, which, as of yet, do not exist. This need has been addressed and a newly assembled dataset of reference measurements for the material under study (i.e., Fontainebleau quartz sand) is presented in this thesis. With this reference dataset, a proper basis has been set for the better analysis of future experiments. Together, these experimental developments and results have laid the foundation for future, more detailed investigations of granular mechanics, where both stress and strain may be characterised locally in a specimen under load, in a full-field sense.

Subjects/Keywords: Annan materialteknik; Geoteknik; Annan maskinteknik; Granular media; Neutron diffraction; Plane-strain apparatus; Stress distribution; Localised stress-strain

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APA (6^th Edition):

Athanasopoulos, S. (2019). Multiscale granular mechanics: A neutron diffraction based experimental approach. (Doctoral Dissertation). University of Lund. Retrieved from http://lup.lub.lu.se/record/8025d4a3-c028-4b28-891a-5b4f6b3e14f2 ; http://portal.research.lu.se/ws/files/69618862/ThesisStefanosAthanasopoulos.pdf

Chicago Manual of Style (16^th Edition):

Athanasopoulos, Stefanos. “Multiscale granular mechanics: A neutron diffraction based experimental approach.” 2019. Doctoral Dissertation, University of Lund. Accessed December 12, 2019. http://lup.lub.lu.se/record/8025d4a3-c028-4b28-891a-5b4f6b3e14f2 ; http://portal.research.lu.se/ws/files/69618862/ThesisStefanosAthanasopoulos.pdf.

MLA Handbook (7^th Edition):

Athanasopoulos, Stefanos. “Multiscale granular mechanics: A neutron diffraction based experimental approach.” 2019. Web. 12 Dec 2019.

Vancouver:

Athanasopoulos S. Multiscale granular mechanics: A neutron diffraction based experimental approach. [Internet] [Doctoral dissertation]. University of Lund; 2019. [cited 2019 Dec 12]. Available from: http://lup.lub.lu.se/record/8025d4a3-c028-4b28-891a-5b4f6b3e14f2 ; http://portal.research.lu.se/ws/files/69618862/ThesisStefanosAthanasopoulos.pdf.

Council of Science Editors:

Athanasopoulos S. Multiscale granular mechanics: A neutron diffraction based experimental approach. [Doctoral Dissertation]. University of Lund; 2019. Available from: http://lup.lub.lu.se/record/8025d4a3-c028-4b28-891a-5b4f6b3e14f2 ; http://portal.research.lu.se/ws/files/69618862/ThesisStefanosAthanasopoulos.pdf

University of Alberta

8. KIM, CHUN IL. The Role of First Order Surface Effects in Linear Elastic Fracture Mechanics.

Degree: PhD, Department of Mechanical Engineering, 2012, University of Alberta

URL: https://era.library.ualberta.ca/files/rr171z786

► Structures at relatively small scales (e.g. nano/micro scale) behave differently in comparison to those examined at the macro scale. This is mainly because a high… (more)

Subjects/Keywords: size-dependent stress distributions; interface cracks; First Order Surface Effects; linear elastic fracture mechanics; plane deformations; anti-plane deformations; Cauchy singular integro-differential equations

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APA (6^th Edition):

KIM, C. I. (2012). The Role of First Order Surface Effects in Linear Elastic Fracture Mechanics. (Doctoral Dissertation). University of Alberta. Retrieved from https://era.library.ualberta.ca/files/rr171z786

Chicago Manual of Style (16^th Edition):

KIM, CHUN IL. “The Role of First Order Surface Effects in Linear Elastic Fracture Mechanics.” 2012. Doctoral Dissertation, University of Alberta. Accessed December 12, 2019. https://era.library.ualberta.ca/files/rr171z786.

MLA Handbook (7^th Edition):

KIM, CHUN IL. “The Role of First Order Surface Effects in Linear Elastic Fracture Mechanics.” 2012. Web. 12 Dec 2019.

Vancouver:

KIM CI. The Role of First Order Surface Effects in Linear Elastic Fracture Mechanics. [Internet] [Doctoral dissertation]. University of Alberta; 2012. [cited 2019 Dec 12]. Available from: https://era.library.ualberta.ca/files/rr171z786.

Council of Science Editors:

KIM CI. The Role of First Order Surface Effects in Linear Elastic Fracture Mechanics. [Doctoral Dissertation]. University of Alberta; 2012. Available from: https://era.library.ualberta.ca/files/rr171z786

9. Dib, Dayana. Analyse théorique et numérique de l'endommagement par micro-fissuration descomposites à matrice quasi-fragile : Theoretical and numerical analysis of damage by micro-cracking composite materials of quasi-brittle matrix.

Degree: Docteur es, Mécanique, 2015, Université Paris-Est

URL: http://www.theses.fr/2015PESC1099

►

Le problème initial traité dans cette thèse relève du cadre général de la modélisation des tunnels profonds. Pour cela, on a adopté l'approche basée sur… (more)

▼

Le problème initial traité dans cette thèse relève du cadre général de la modélisation des tunnels profonds. Pour cela, on a adopté l'approche basée sur la mécanique linéaire de la rupture. L'étude s'est appuyée sur le critère mixte de Leguillon. Suite à cette étude, on a pu tirer que ce n'est pas le critère mixte qui est insuffisant mais plutôt la façon d'aborder le problème. D'où le passage à la prise en compte de l'hétérogénéité du matériau constitutif et la possibilité d'amorçage d'une fissure sous une contrainte de compression. Une première approche a été entreprise par l'étude d'une bicouche périodique sous contrainte de compression verticale. La couche de grande raideur s'est apparue le siège d'une traction transversale. Effectivement la possibilité d'amorçage d'une fissure est tout à fait probable grâce toujours à la vérification des critères d'énergie et de contrainte. Une deuxième approche consistait à observer au plus près la microstructure du matériau ; on a considéré le problème d'une inclusion elliptique dans une matrice infinie. Par la méthode des variables complexes et la technique de la transformation conforme, on a analysé le champ de contrainte autour de l'inclusion et on a mis en évidence la présence d'une traction qui dépend fortement des paramètres choisis. Par la méthode des éléments finis étendus, on a calculé la variation de l'énergie potentielle mise en jeu par la création d'une fissure. Par une démarche semblable à l'approche précédente, à savoir la vérification des critères d'énergie et de contrainte, on a conclu à la possibilité d'amorçage d'une fissure. Mots clefs : mécanique linéaire de la rupture, critère mixte de Leguillon, énergie potentielle, taux de restitution d'énergie, méthode des éléments finis étendus, bicouche périodique, méthode des variables complexes

The initial problem treated in this thesis falls within the general framework of modeling deep tunnels. For this reason, the approach based on linear fracture mechanics was adopted. The study was based on the mixed criterion of Leguillon. Following This study, the mixed criterion was not insufficient but the way to approach the problem was. Where the transition to the consideration of the heterogeneity of the material component and the possibility of initing a crack under a compressive stress. A first approach was undertaken the study of periodic bilayer under the stress of vertical compression. The layer of the highest stiffness has appeared the seat of a transverse traction. Indeed the possibility to initiate a crack is quite likely always through the verification of the energy and the stress criteria. A second approach was to observe more closer the microstructure of the material; we have considered the problem of elliptic inclusion in an infinite matrix. By the method of complex variables and the technique of conformal mapping, we analyzed the stress field around the inclusion and were revealed the presence of a traction which depends strongly of the selected parameters. By the extended finite element method, we…

Advisors/Committee Members: Dormieux, Luc (thesis director).

Subjects/Keywords: Endommagement; Micro-Fissuration; Matrice quasi-Fragile; Contrainte plane; (v.e.r.); Éléments finis étendus; Damage; Micro-Cracking; Quasi-Brittle matrix; Plane stress; V.e.r; Xfem

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APA (6^th Edition):

Dib, D. (2015). Analyse théorique et numérique de l'endommagement par micro-fissuration descomposites à matrice quasi-fragile : Theoretical and numerical analysis of damage by micro-cracking composite materials of quasi-brittle matrix. (Doctoral Dissertation). Université Paris-Est. Retrieved from http://www.theses.fr/2015PESC1099

Chicago Manual of Style (16^th Edition):

Dib, Dayana. “Analyse théorique et numérique de l'endommagement par micro-fissuration descomposites à matrice quasi-fragile : Theoretical and numerical analysis of damage by micro-cracking composite materials of quasi-brittle matrix.” 2015. Doctoral Dissertation, Université Paris-Est. Accessed December 12, 2019. http://www.theses.fr/2015PESC1099.

MLA Handbook (7^th Edition):

Dib, Dayana. “Analyse théorique et numérique de l'endommagement par micro-fissuration descomposites à matrice quasi-fragile : Theoretical and numerical analysis of damage by micro-cracking composite materials of quasi-brittle matrix.” 2015. Web. 12 Dec 2019.

Vancouver:

Dib D. Analyse théorique et numérique de l'endommagement par micro-fissuration descomposites à matrice quasi-fragile : Theoretical and numerical analysis of damage by micro-cracking composite materials of quasi-brittle matrix. [Internet] [Doctoral dissertation]. Université Paris-Est; 2015. [cited 2019 Dec 12]. Available from: http://www.theses.fr/2015PESC1099.

Council of Science Editors:

Dib D. Analyse théorique et numérique de l'endommagement par micro-fissuration descomposites à matrice quasi-fragile : Theoretical and numerical analysis of damage by micro-cracking composite materials of quasi-brittle matrix. [Doctoral Dissertation]. Université Paris-Est; 2015. Available from: http://www.theses.fr/2015PESC1099

Brno University of Technology

10. Pavlů, Jiří. Aplikace algoritmu metody konečných prvků na rovinnou úlohu .

Degree: 2008, Brno University of Technology

URL: http://hdl.handle.net/11012/25198

► Cílem práce je naprogramovat algoritmus metody konečných prvků pro jednoduchou rovinou úlohu. Programový systém ANSYS bude využit pro přípravu modelu, pro zobrazení vypočtených výsledků a… (more)

Subjects/Keywords: MKP; rovinna uloha; rovinna napjatost; rovinna deformace; FEM; plane task; plane stress; plane strain

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APA (6^th Edition):

Pavlů, J. (2008). Aplikace algoritmu metody konečných prvků na rovinnou úlohu . (Thesis). Brno University of Technology. Retrieved from http://hdl.handle.net/11012/25198

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):

Pavlů, Jiří. “Aplikace algoritmu metody konečných prvků na rovinnou úlohu .” 2008. Thesis, Brno University of Technology. Accessed December 12, 2019. http://hdl.handle.net/11012/25198.

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

MLA Handbook (7^th Edition):

Pavlů, Jiří. “Aplikace algoritmu metody konečných prvků na rovinnou úlohu .” 2008. Web. 12 Dec 2019.

Vancouver:

Pavlů J. Aplikace algoritmu metody konečných prvků na rovinnou úlohu . [Internet] [Thesis]. Brno University of Technology; 2008. [cited 2019 Dec 12]. Available from: http://hdl.handle.net/11012/25198.

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

Council of Science Editors:

Pavlů J. Aplikace algoritmu metody konečných prvků na rovinnou úlohu . [Thesis]. Brno University of Technology; 2008. Available from: http://hdl.handle.net/11012/25198

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

Brno University of Technology

11. Husáriková, Natália. Statické řešení částí textilních konstrukcí .

Degree: 2014, Brno University of Technology

URL: http://hdl.handle.net/11012/34829

► Bakalárska práca sa zaoberá zisťovaním modulu pružnosti experimentálnym meraním a porovnaním s hodnotami deklarovanými výrobcom. V práci je navrhnutá vlastná metodika merania membránových pásikov. Takto… (more)

Subjects/Keywords: Membránové pásiky; ortotropia; Hookov zákon; metóda najmenších štvorcov; rovinná napätosť; MKP; SHELL 181; PLANE 182; Membrane strips; orthotrophy; Hooke's law; the least squares method; plane stress; FEM; SHELL 181; PLANE 182

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APA (6^th Edition):

Husáriková, N. (2014). Statické řešení částí textilních konstrukcí . (Thesis). Brno University of Technology. Retrieved from http://hdl.handle.net/11012/34829

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):

Husáriková, Natália. “Statické řešení částí textilních konstrukcí .” 2014. Thesis, Brno University of Technology. Accessed December 12, 2019. http://hdl.handle.net/11012/34829.

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

MLA Handbook (7^th Edition):

Husáriková, Natália. “Statické řešení částí textilních konstrukcí .” 2014. Web. 12 Dec 2019.

Vancouver:

Husáriková N. Statické řešení částí textilních konstrukcí . [Internet] [Thesis]. Brno University of Technology; 2014. [cited 2019 Dec 12]. Available from: http://hdl.handle.net/11012/34829.

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

Council of Science Editors:

Husáriková N. Statické řešení částí textilních konstrukcí . [Thesis]. Brno University of Technology; 2014. Available from: http://hdl.handle.net/11012/34829

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

University of Akron

12. Suh, Jong Beom. STRESS ANALYSIS OF RUBBER BLOCKS UNDER VERTICAL LOADING AND SHEAR LOADING.

Degree: PhD, Mechanical Engineering, 2007, University of Akron

URL: http://rave.ohiolink.edu/etdc/view?acc_num=akron1185822927

► Rubber blocks (or springs) are structural components used in many applications. They have various shapes and the loading directions are different depending on the application.… (more)

▼ Rubber blocks (or springs) are structural components used in many applications. They have various shapes and the loading directions are different depending on the application. Stress responses of rubber blocks under two loading directions have been studied separately. First, design characteristics of rubber blocks under vertical loading were studied for two sets of contact conditions. The characteristics are an apparent (or compression) modulus, contact shear and normal stresses. Rubber blocks bonded to two rigid plates is the initial set. This problem has been solved previously. However, the problem of the other set, rubber blocks with one surface bonded to a rigid plate and the other surface in contact with a frictional surface, has been little published. Approximate solutions for rectangular blocks in plane strain and for axi-symmetric discs are derived under the assumption of Coulomb frictional contact, treating rubber as linear elastic incompressible material. Design characteristics are compared with FEA and experimental results with shape factors (1 to 6). It was found that friction coefficient plays an important role in design characteristics. Second, FEA calculations have been carried out for a rubber shear spring model, consisting of a block of an incompressible highly-elastic material, bonded between two rigid plates and sheared by displacing one of the plates parallel to the other. Forces necessary to maintain the deformation were evaluated and stress distributions are reported. Attention is drawn to large tensile stresses that develop in the interior of the block. These are attributed to the stress-free end surfaces. These internal stresses depended strongly on the end surface shape, and decreased markedly when some volume expansion of the rubber was permitted by assigning values to Poisson’s ratio lower than 0.5. Similar to sheared blocks, FEA calculations for a rubber tube model bonded between two axi-symmetric rigid tubes are reported. The tubes were sheared by displacing the inner rigid tube in the two directions, axially parallel to the tube central axis and in azimuthal direction by rotation about the inner tube while the outer tube was held fixed. It was found that the stress responses are analogous to that of sheared blocks. Advisors/Committee Members: Kelly, Graham (Advisor).

Subjects/Keywords: Engineering, Mechanical; Incompressible rubber; Contact stress; Friction coefficient; Shape factor; Plane strain; Axi-symmetric disc; Simple shear

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APA (6^th Edition):

Suh, J. B. (2007). STRESS ANALYSIS OF RUBBER BLOCKS UNDER VERTICAL LOADING AND SHEAR LOADING. (Doctoral Dissertation). University of Akron. Retrieved from http://rave.ohiolink.edu/etdc/view?acc_num=akron1185822927

Chicago Manual of Style (16^th Edition):

Suh, Jong Beom. “STRESS ANALYSIS OF RUBBER BLOCKS UNDER VERTICAL LOADING AND SHEAR LOADING.” 2007. Doctoral Dissertation, University of Akron. Accessed December 12, 2019. http://rave.ohiolink.edu/etdc/view?acc_num=akron1185822927.

MLA Handbook (7^th Edition):

Suh, Jong Beom. “STRESS ANALYSIS OF RUBBER BLOCKS UNDER VERTICAL LOADING AND SHEAR LOADING.” 2007. Web. 12 Dec 2019.

Vancouver:

Suh JB. STRESS ANALYSIS OF RUBBER BLOCKS UNDER VERTICAL LOADING AND SHEAR LOADING. [Internet] [Doctoral dissertation]. University of Akron; 2007. [cited 2019 Dec 12]. Available from: http://rave.ohiolink.edu/etdc/view?acc_num=akron1185822927.

Council of Science Editors:

Suh JB. STRESS ANALYSIS OF RUBBER BLOCKS UNDER VERTICAL LOADING AND SHEAR LOADING. [Doctoral Dissertation]. University of Akron; 2007. Available from: http://rave.ohiolink.edu/etdc/view?acc_num=akron1185822927

University of Southern California

13. Sheikhhassani, Ramtin. Scattering of a plane harmonic SH-wave and dynamic stress concentration for multiple multilayered inclusions embedded in an elastic half-space.

Degree: PhD, Mechanical Engineering, 2015, University of Southern California

URL: http://digitallibrary.usc.edu/cdm/compoundobject/collection/p15799coll3/id/558014/rec/5691

► The scattering of a plane harmonic SH-wave by an arbitrary number of layered inclusions in a half-space is investigated bya direct boundary integral equation method.… (more)

Subjects/Keywords: multiple scattering; dynamic stress concentration factor; wave propagation; layered inclusions; elastic waves; anti-plane strain; non-hypersingular boundary element method

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APA (6^th Edition):

Sheikhhassani, R. (2015). Scattering of a plane harmonic SH-wave and dynamic stress concentration for multiple multilayered inclusions embedded in an elastic half-space. (Doctoral Dissertation). University of Southern California. Retrieved from http://digitallibrary.usc.edu/cdm/compoundobject/collection/p15799coll3/id/558014/rec/5691

Chicago Manual of Style (16^th Edition):

Sheikhhassani, Ramtin. “Scattering of a plane harmonic SH-wave and dynamic stress concentration for multiple multilayered inclusions embedded in an elastic half-space.” 2015. Doctoral Dissertation, University of Southern California. Accessed December 12, 2019. http://digitallibrary.usc.edu/cdm/compoundobject/collection/p15799coll3/id/558014/rec/5691.

MLA Handbook (7^th Edition):

Sheikhhassani, Ramtin. “Scattering of a plane harmonic SH-wave and dynamic stress concentration for multiple multilayered inclusions embedded in an elastic half-space.” 2015. Web. 12 Dec 2019.

Vancouver:

Sheikhhassani R. Scattering of a plane harmonic SH-wave and dynamic stress concentration for multiple multilayered inclusions embedded in an elastic half-space. [Internet] [Doctoral dissertation]. University of Southern California; 2015. [cited 2019 Dec 12]. Available from: http://digitallibrary.usc.edu/cdm/compoundobject/collection/p15799coll3/id/558014/rec/5691.

Council of Science Editors:

Sheikhhassani R. Scattering of a plane harmonic SH-wave and dynamic stress concentration for multiple multilayered inclusions embedded in an elastic half-space. [Doctoral Dissertation]. University of Southern California; 2015. Available from: http://digitallibrary.usc.edu/cdm/compoundobject/collection/p15799coll3/id/558014/rec/5691

University of Newcastle

14. Arifuzzaman, Md. Fundamental mechanical behaviour of perlite composite foam and applications.

Degree: PhD, 2017, University of Newcastle

URL: http://hdl.handle.net/1959.13/1336136

►

Research Doctorate - Doctor of Philosophy (PhD)

The fundamental mechanical behaviour of perlite composite foam is studied theoretically and experimentally for basic understanding and the… (more)

▼

Research Doctorate - Doctor of Philosophy (PhD)

The fundamental mechanical behaviour of perlite composite foam is studied theoretically and experimentally for basic understanding and the development of predictive models and practical applications. The existence of plane stress/strain compressive properties and volume fractions of structural elements of perlite foam are conceptualised for the basic understanding, leading to the development of predictive models of compressive properties, and development of sandwich composites for practical applications. Novel composites made of expanded perlite particles and sodium silicate solution were developed. For the composites development, expanded perlite particles were characterised for various densities and porosities. Sodium silicate (as a binder) dehydration behaviour was characterised with phases formed during dehydration i.e. liquid, gel, and solid phases. The water-loss time curve for dehydration was found to have three distinctive parts—a linear part at an early stage for the liquid phase, followed by non-linear part during a period between the commencement of the gel and hydrated solid phase formations, and then another linear part for the hydrated solid phase. For the purpose of sandwich composite development, mechanical properties of Brown paper were investigated by coating the paper on one side with varying sodium silicate content in dilution. When Brown paper was coated with diluted or undiluted binder, its tensile properties were affected due to the sodium silicate content in dilution. The best performance of Brown paper was found when coated with undiluted binder. A novel mechanical behaviour of perlite/sodium silicate composites was studied with the benefits of a new manufacturing method based on perlite particle buoyancy. The objective was to develop perlite composites and to understand the quantitative relations between manufacturing parameters, volume fractions of constituents, and properties. Foams as composites were manufactured with diluted sodium silicate binder for a density range of 0.2–0.5 g/cm³. One of practical milestones achieved for composite properties without reinforcement was a density of 0.3 g/cm³ at a compressive strength of 1 MPa. Manufactured perlite/sodium silicate composites were analysed and discussed for understanding from three different perspectives: manufacturing parameters (binder content, compaction pressure, and compaction ratio), properties (particle size, density, compressive strength, and modulus), and volume fractions of constituents. A rule of mixtures applicable for perlite composites for a constant compaction ratio was developed in comparison with that for particulate composites with non-compaction. This may be a basis for further development for variable compaction ratio. The mechanism of internal structure formation of perlite composite foams due to compaction was identified. Foam and particle envelope densities and volume fractions were theoretically modelled for prediction and practical evaluation. The volume…

Advisors/Committee Members: University of Newcastle. Faculty of Engineering & Built Environment, School of Engineering.

Subjects/Keywords: expanded perlite; perlite composite; density prediction; compressive strength prediction; plane stress/strain; flexural properties; sandwich composites

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APA (6^th Edition):

Arifuzzaman, M. (2017). Fundamental mechanical behaviour of perlite composite foam and applications. (Doctoral Dissertation). University of Newcastle. Retrieved from http://hdl.handle.net/1959.13/1336136

Chicago Manual of Style (16^th Edition):

Arifuzzaman, Md. “Fundamental mechanical behaviour of perlite composite foam and applications.” 2017. Doctoral Dissertation, University of Newcastle. Accessed December 12, 2019. http://hdl.handle.net/1959.13/1336136.

MLA Handbook (7^th Edition):

Arifuzzaman, Md. “Fundamental mechanical behaviour of perlite composite foam and applications.” 2017. Web. 12 Dec 2019.

Vancouver:

Arifuzzaman M. Fundamental mechanical behaviour of perlite composite foam and applications. [Internet] [Doctoral dissertation]. University of Newcastle; 2017. [cited 2019 Dec 12]. Available from: http://hdl.handle.net/1959.13/1336136.

Council of Science Editors:

Arifuzzaman M. Fundamental mechanical behaviour of perlite composite foam and applications. [Doctoral Dissertation]. University of Newcastle; 2017. Available from: http://hdl.handle.net/1959.13/1336136

15. Zilakos, Ilias. Material modelling of rubber coated fabrics employed in the design of innovative ship rescue systems.

Degree: 2018, National Technical University of Athens (NTUA); Εθνικό Μετσόβιο Πολυτεχνείο (ΕΜΠ)

URL: http://hdl.handle.net/10442/hedi/44445

► The computational modelling of pneumatic structures requires accurate and numerically robust representation of the mechanical response of the composite system used in their fabrication. In… (more)

▼ The computational modelling of pneumatic structures requires accurate and numerically robust representation of the mechanical response of the composite system used in their fabrication. In this thesis, a new constitutive law isdeveloped for describing the mechanical behaviourof rubber coated fabrics under uniaxial and biaxial loading. Within the continuum framework of orthotropic hyperelasticity, the adopted modelling approach directly accounts for both plane stress and incompressibility conditions. The candidate material is used in the fabrication of prototype inflatable devices which are envisaged to be used in emergency situations at sea, providing reserve buoyancy to damaged ships, preventing capsizing and/or sinking, along with lifting wreckages from the seabed.The proposed strain energy density function is based on an integral form of a hyperbolic trigonometric function. A stepwise procedure, partially guided by the linear response of the material, was followed to determine the argument-expression of the trigonometric function. The material parameters involved in the formulation of the strain energy density function were simultaneously fitted to uniaxial and biaxial tension tests data, carried out at various stress ratios, using a gradient based optimization scheme. The computed material parameters were found to satisfy the positive definiteness constraints of the linear elasticity tensor. Furthermore, the numerical stability of the material model was also examined since this a prerequisite for the reliability of a FE simulation.The findings suggest that no numerical instabilities should be encountered for the applications examined in this work.The proposed strain energy density function was employed in the derivation of the stress and elasticity tensors for use in the numerical implementation of the constitutive model into the finite element code ABAQUS. Verification and validation tests of the required material subroutine were carried out respectively by single elements tests and simulations of the actual test piecesused in the uniaxial and biaxial tension tests. The final chapter of the thesis presents certain structural applications of the salvage unit which demonstrate the utility and effectiveness of the constitutive law and also highlight specific aspects of its response under loading. In particular, a shell FE analysis of the spherocylindrical unit under internal pressure has shown that the bending at the cylinder to sphere transition is very localised and therefore its response is close to that of a membrane structure. The FE simulation of the latter stages of inflation of the salvage devices inside an actual double bottom structure resulted in good agreement with proof of concept tests under dry conditions, in terms of global response and contact areas. Finally, the behaviour of the inflatables under buoyancy loading was simulated and studied, leading to useful …

Subjects/Keywords: Καταστατικές εξισώσεις; Yπερελαστικότητα; Aσυμπιεστότητα; Oρθοτροπία; Υφάσματα με ελαστική επίστρωση; θαλάσσια διάσωση; Επίπεδη ένταση; Constitutive model; Hyperelasticity; Orthotropic; Incompressibility; Plane stress; Rubber coated fabrics; Uniaxial / biaxial response; Plane stress; UMAT; Uanisohyper; Inflatable; Marine salvage

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APA (6^th Edition):

Zilakos, I. (2018). Material modelling of rubber coated fabrics employed in the design of innovative ship rescue systems. (Thesis). National Technical University of Athens (NTUA); Εθνικό Μετσόβιο Πολυτεχνείο (ΕΜΠ). Retrieved from http://hdl.handle.net/10442/hedi/44445

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):

Zilakos, Ilias. “Material modelling of rubber coated fabrics employed in the design of innovative ship rescue systems.” 2018. Thesis, National Technical University of Athens (NTUA); Εθνικό Μετσόβιο Πολυτεχνείο (ΕΜΠ). Accessed December 12, 2019. http://hdl.handle.net/10442/hedi/44445.

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

MLA Handbook (7^th Edition):

Zilakos, Ilias. “Material modelling of rubber coated fabrics employed in the design of innovative ship rescue systems.” 2018. Web. 12 Dec 2019.

Vancouver:

Zilakos I. Material modelling of rubber coated fabrics employed in the design of innovative ship rescue systems. [Internet] [Thesis]. National Technical University of Athens (NTUA); Εθνικό Μετσόβιο Πολυτεχνείο (ΕΜΠ); 2018. [cited 2019 Dec 12]. Available from: http://hdl.handle.net/10442/hedi/44445.

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

Council of Science Editors:

Zilakos I. Material modelling of rubber coated fabrics employed in the design of innovative ship rescue systems. [Thesis]. National Technical University of Athens (NTUA); Εθνικό Μετσόβιο Πολυτεχνείο (ΕΜΠ); 2018. Available from: http://hdl.handle.net/10442/hedi/44445

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

16. Backes, Marie-Rose. Stress fields for the interaction of in-plane and out-of-plane forces in reinforced concrete shell elements.

Degree: 2017, EPFL

URL: http://infoscience.epfl.ch/record/225310

► Plane reinforced concrete (RC) elements are used in a large variety of structures. Their principal function is to carry forces that act in the plane… (more)

▼ Plane reinforced concrete (RC) elements are used in a large variety of structures. Their principal function is to carry forces that act in the plane of the element, but external actions and connections to other structural elements generally introduce additional out-of-plane forces. In practice, the design of such elements is often performed in a simplified manner, neglecting the interaction between these different internal forces. However, especially for existing structures the need for more precise and kinematically consistent analysis tools arises. This thesis provides novel tools based on the elastic-plastic stress field (EPSF) method to investigate the interaction between in-plane and out-of-plane forces in plane RC elements in general and the effect of transverse bending on the longitudinal shear resistance of beams in particular. A multi-layered (ML) EPSF approach is developed. Applied to a unitary web segment, in-plane shear-transverse bending interaction diagrams are established and compared to existing rigid-plastic (RP) interaction models. In general it is found that the influence on the shear resistance is less pronounced, especially in case of small transverse moments. The shear transfer actions admitted in RP models that consist in a shift of the compression field to the bending compression side and a rearrangement of the stirrup forces are confirmed. However, it is shown that the stress field is highly non-linear in the transverse directions (stress/strain distribution and inclination) and strongly depends on the intensity of the applied transverse moment. The concrete strength reduction factor Î·Îµ is generally higher and high shear reinforcement ratios or asymmetric layouts allow equilibrating small moments without disturbing the stress field in the concrete. This increases the predicted shear resistance. The longitudinal deformation is shown to have a non-negligible effect on the overall interaction and ultimate resistance. A simplified verification method for beams in practice is proposed. Based on the EPSF finite element method (FEM), it considers the influence of the transverse moment by means of a reduced web width and an effective shear reinforcement ratio. Validation with tests from the literature gave safe but not overly conservative results and consistent predictions of the failure modes. The method provides enhanced lower-bound solutions. Plane EPSF analyses of experimental tests suggest that the influence of the transverse bending moment in beams is less pronounced than predicted by interaction models, especially if ductile failure modes occur. But more experimental data is required to validate this observation. A non-linear FEM based on the ML-EPSF is developed. It aims to extend the field of application of the EPSF FEM by accounting for in-plane (normal and shear) and out-of-plane (bending and shear) actions in plane RC elements. Concrete is modelled by ML in-plane elements that are combined with out-of-plane shear elements. Reinforcing steel is modelled separately by bar elements.… Advisors/Committee Members: Muttoni, Aurelio, Fernández Ruiz, Miguel.

Subjects/Keywords: Reinforced concrete flat shell elements; elastic-plastic stress fields; multi-layered stress fields; shear resistance; interaction of in-plane shear and transverse bending; non-linear finite element method

10 more images…

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APA (6^th Edition):

Backes, M. (2017). Stress fields for the interaction of in-plane and out-of-plane forces in reinforced concrete shell elements. (Thesis). EPFL. Retrieved from http://infoscience.epfl.ch/record/225310

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):

Backes, Marie-Rose. “Stress fields for the interaction of in-plane and out-of-plane forces in reinforced concrete shell elements.” 2017. Thesis, EPFL. Accessed December 12, 2019. http://infoscience.epfl.ch/record/225310.

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

MLA Handbook (7^th Edition):

Backes, Marie-Rose. “Stress fields for the interaction of in-plane and out-of-plane forces in reinforced concrete shell elements.” 2017. Web. 12 Dec 2019.

Vancouver:

Backes M. Stress fields for the interaction of in-plane and out-of-plane forces in reinforced concrete shell elements. [Internet] [Thesis]. EPFL; 2017. [cited 2019 Dec 12]. Available from: http://infoscience.epfl.ch/record/225310.

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

Council of Science Editors:

Backes M. Stress fields for the interaction of in-plane and out-of-plane forces in reinforced concrete shell elements. [Thesis]. EPFL; 2017. Available from: http://infoscience.epfl.ch/record/225310

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

Brno University of Technology

17. Koch, Martin. Řešení vybraných úloh pružnosti pomocí Airyho funkce napětí .

Degree: 2016, Brno University of Technology

URL: http://hdl.handle.net/11012/60546

► Bakalářská práce se zabývá řešením vybraných úloh z pružnosti pevnosti pomocí Airyho funkce napětí. V práci je nejprve popsáno užití a zavedení této funkce a… (more)

Subjects/Keywords: Airyho funkce napětí; klasická teorie pružnosti; metoda konečných prvků; rovinné namáhaní; Airy stress function; Mechanics of Materials solution; Finite Element Methed; plane stress

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APA (6^th Edition):

Koch, M. (2016). Řešení vybraných úloh pružnosti pomocí Airyho funkce napětí . (Thesis). Brno University of Technology. Retrieved from http://hdl.handle.net/11012/60546

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):

Koch, Martin. “Řešení vybraných úloh pružnosti pomocí Airyho funkce napětí .” 2016. Thesis, Brno University of Technology. Accessed December 12, 2019. http://hdl.handle.net/11012/60546.

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

MLA Handbook (7^th Edition):

Koch, Martin. “Řešení vybraných úloh pružnosti pomocí Airyho funkce napětí .” 2016. Web. 12 Dec 2019.

Vancouver:

Koch M. Řešení vybraných úloh pružnosti pomocí Airyho funkce napětí . [Internet] [Thesis]. Brno University of Technology; 2016. [cited 2019 Dec 12]. Available from: http://hdl.handle.net/11012/60546.

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

Council of Science Editors:

Koch M. Řešení vybraných úloh pružnosti pomocí Airyho funkce napětí . [Thesis]. Brno University of Technology; 2016. Available from: http://hdl.handle.net/11012/60546

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

University of Florida

18. Taesiri, Yongyuth, 1951-. Characterization of pavement materials by moving wheel stress paths.

Degree: 1983, University of Florida

URL: http://ufdc.ufl.edu/AA00032870

Subjects/Keywords: Axial stress; Compressive stress; Modeling; Plane stress; Shear stress; Stress distribution; Stress strain relationships; Stress tests; Triaxial stress; Wheels; Pavements – Design and construction ( fast ); Pavements – Testing ( fast )

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APA (6^th Edition):

Taesiri, Yongyuth, 1. (1983). Characterization of pavement materials by moving wheel stress paths. (Thesis). University of Florida. Retrieved from http://ufdc.ufl.edu/AA00032870

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):

Taesiri, Yongyuth, 1951-. “Characterization of pavement materials by moving wheel stress paths.” 1983. Thesis, University of Florida. Accessed December 12, 2019. http://ufdc.ufl.edu/AA00032870.

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

MLA Handbook (7^th Edition):

Taesiri, Yongyuth, 1951-. “Characterization of pavement materials by moving wheel stress paths.” 1983. Web. 12 Dec 2019.

Vancouver:

Taesiri, Yongyuth 1. Characterization of pavement materials by moving wheel stress paths. [Internet] [Thesis]. University of Florida; 1983. [cited 2019 Dec 12]. Available from: http://ufdc.ufl.edu/AA00032870.

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

Council of Science Editors:

Taesiri, Yongyuth 1. Characterization of pavement materials by moving wheel stress paths. [Thesis]. University of Florida; 1983. Available from: http://ufdc.ufl.edu/AA00032870

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

University of Florida

19. Crosby, Melissa Kay ( Author, Primary ). Finite element analysis of a laboratory soil box test facility for evaluating the structural response of concrete pipe.

Degree: 2003, University of Florida

URL: http://ufdc.ufl.edu/UFE0000669

Subjects/Keywords: Boxes; Diameters; Finite element analysis; Plane stress; Reinforced concrete; Shear stress; Signals; Steels; Stress distribution; Stress tests

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APA (6^th Edition):

Crosby, Melissa Kay ( Author, P. ). (2003). Finite element analysis of a laboratory soil box test facility for evaluating the structural response of concrete pipe. (Thesis). University of Florida. Retrieved from http://ufdc.ufl.edu/UFE0000669

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):

Crosby, Melissa Kay ( Author, Primary ). “Finite element analysis of a laboratory soil box test facility for evaluating the structural response of concrete pipe.” 2003. Thesis, University of Florida. Accessed December 12, 2019. http://ufdc.ufl.edu/UFE0000669.

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

MLA Handbook (7^th Edition):

Crosby, Melissa Kay ( Author, Primary ). “Finite element analysis of a laboratory soil box test facility for evaluating the structural response of concrete pipe.” 2003. Web. 12 Dec 2019.

Vancouver:

Crosby, Melissa Kay ( Author P). Finite element analysis of a laboratory soil box test facility for evaluating the structural response of concrete pipe. [Internet] [Thesis]. University of Florida; 2003. [cited 2019 Dec 12]. Available from: http://ufdc.ufl.edu/UFE0000669.

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

Council of Science Editors:

Crosby, Melissa Kay ( Author P). Finite element analysis of a laboratory soil box test facility for evaluating the structural response of concrete pipe. [Thesis]. University of Florida; 2003. Available from: http://ufdc.ufl.edu/UFE0000669

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

20. Onopriienko, Oleg. Mécanique de rupture des matériaux piézoélectriques avec des conditions électriques mixtes aux faces de la fissure d'interface : The fracture mechanics of piezoelectric materials with mixed electrical conditions at the faces of the interface crack.

Degree: Docteur es, Mécanique du solide, 2018, Clermont Auvergne; Dniepropetrovsk National University; Université nationale de Dnipropetrovsk

URL: http://www.theses.fr/2018CLFAC085

► Les matériaux actifs, tout d'abord piézoélectriques et piézo-électromagnétiques, sont souvent utilisés comme parties fonctionnelles de différents dispositifs électroniques, y compris les capteurs, les transducteurs et… (more)

▼ Les matériaux actifs, tout d'abord piézoélectriques et piézo-électromagnétiques, sont souvent utilisés comme parties fonctionnelles de différents dispositifs électroniques, y compris les capteurs, les transducteurs et les actionneurs, car ces matériaux ont la possibilité de changer de forme sous le champ électrique ou magnétique. Dans de nombreux cas, la taille des appareils mentionnés est extrêmement petite, mais ils peuvent néanmoins être soumis à de très grands champs mécaniques, électriques et magnétiques. En outre, ces dispositifs sont habituellement construits en éléments pouvant être fabriqués avec différents matériaux (éléments piézoélectriques ou piézoélectro-magnétiques, électrodes, etc.).En raison d'une adhérence imparfaite des éléments mentionnés, différents défauts, comme le décollement et la délamination, peuvent se produire entre différents éléments. Ces situations peuvent avoir lieu lors de la fabrication et de l'exploitation des structures intelligentes actives. Les défauts mentionnés entre différents éléments constitutifs sont appelés fissures d'interface. Ces fissures sont généralement la cause principale de l'échec des constructions. Par conséquent, leur enquête est très importante pour éviter une telle défaillance et fournir la fiabilité des appareils électroniques. Différentes méthodes d'étude des problèmes de mécanique des fractures pour les corps piézoélectriques et piézoélectromagnétiques avec des fissures d'interface ont été développées jusqu'à présent. Les méthodes d'analyse des fissures d'interface dépendent essentiellement de la modélisation des conditions électriques sur les faces des fissures. Parce que les fissures sont habituellement remplies d'un milieu (air, huile de silicium, eau, etc.), il est souhaitable de tenir compte des propriétés de ce support. Pour cette raison, les modèles de fissuration perméables à l'électricité, imperméables et à perméabilité limitée sont développés et utilisés activement à l'heure actuelle. En outre, les faces des fissures peuvent parfois être recouvertes d'électrodes ou la fissure peut être remplie par un fluide conducteur. Dans les deux cas, le modèle de fissure électriquement conducteur doit être appliqué. De nombreux problèmes pour les fissures d'interface dans le cadre des modèles de fissure électriques mentionnés sont déjà résolus, mais certains problèmes importants restent résolus jusqu'à nos jours. La solution de ces problèmes définit les tâches de la présente enquête. Tout d'abord, il convient de mentionner que l'étude analytique des fissures d'interface avec des conditions électriques mixtes sur les faces des fissures est inconnue pour l'auteur de cette thèse. Par conséquent, la première tâche du travail est liée à l'étude d'une fissure d'interface dans un matériau thermique piézoélectrique sous l'action de charges mécaniques anti-avion mécaniques et planes, à condition qu'une partie des faces de fissure soit électriquement conductrice tandis qu'une autre soit électriquement perméable. En raison de la présentation des quantités… Advisors/Committee Members: Lapusta, Yuri (thesis director), Loboda, Volodymyr (thesis director).

Subjects/Keywords: Piezoélectrique; Piezo-électro-magnétique; Problèmes anti plane et avion; Méthodes analytiques; Potentiels complexes; Facteurs d'intensité de contrainte; Piezoelectric; Piezo-electro-magnetic; Antiplane and plane problems; Analytical methods; Complex potentials; Stress intensity factors

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

APA (6^th Edition):

Onopriienko, O. (2018). Mécanique de rupture des matériaux piézoélectriques avec des conditions électriques mixtes aux faces de la fissure d'interface : The fracture mechanics of piezoelectric materials with mixed electrical conditions at the faces of the interface crack. (Doctoral Dissertation). Clermont Auvergne; Dniepropetrovsk National University; Université nationale de Dnipropetrovsk. Retrieved from http://www.theses.fr/2018CLFAC085

Chicago Manual of Style (16^th Edition):

Onopriienko, Oleg. “Mécanique de rupture des matériaux piézoélectriques avec des conditions électriques mixtes aux faces de la fissure d'interface : The fracture mechanics of piezoelectric materials with mixed electrical conditions at the faces of the interface crack.” 2018. Doctoral Dissertation, Clermont Auvergne; Dniepropetrovsk National University; Université nationale de Dnipropetrovsk. Accessed December 12, 2019. http://www.theses.fr/2018CLFAC085.

MLA Handbook (7^th Edition):

Onopriienko, Oleg. “Mécanique de rupture des matériaux piézoélectriques avec des conditions électriques mixtes aux faces de la fissure d'interface : The fracture mechanics of piezoelectric materials with mixed electrical conditions at the faces of the interface crack.” 2018. Web. 12 Dec 2019.

Vancouver:

Onopriienko O. Mécanique de rupture des matériaux piézoélectriques avec des conditions électriques mixtes aux faces de la fissure d'interface : The fracture mechanics of piezoelectric materials with mixed electrical conditions at the faces of the interface crack. [Internet] [Doctoral dissertation]. Clermont Auvergne; Dniepropetrovsk National University; Université nationale de Dnipropetrovsk; 2018. [cited 2019 Dec 12]. Available from: http://www.theses.fr/2018CLFAC085.

Council of Science Editors:

Onopriienko O. Mécanique de rupture des matériaux piézoélectriques avec des conditions électriques mixtes aux faces de la fissure d'interface : The fracture mechanics of piezoelectric materials with mixed electrical conditions at the faces of the interface crack. [Doctoral Dissertation]. Clermont Auvergne; Dniepropetrovsk National University; Université nationale de Dnipropetrovsk; 2018. Available from: http://www.theses.fr/2018CLFAC085

University of Florida

21. Vigroux, Nicolas. Approximate Methods for Evaluating Mode Mixity in Delaminated Composites.

Degree: MS, Mechanical Engineering - Mechanical and Aerospace Engineering, 2009, University of Florida

URL: http://ufdc.ufl.edu/UFE0024103

► In laminated materials, such as composites, interlaminar damage is one of the major modes of failure. Due to the increasing incorporation of composites into aircraft… (more)

Subjects/Keywords: Cantilever beams; Crack closure; Delamination; Fracture mechanics; Modeling; Phase angle; Plane stress; Structural deflection; Three dimensional modeling; Two dimensional modeling; ctfm, delamination, fea, fracture, mutifidelity, vcct

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

APA (6^th Edition):

Vigroux, N. (2009). Approximate Methods for Evaluating Mode Mixity in Delaminated Composites. (Masters Thesis). University of Florida. Retrieved from http://ufdc.ufl.edu/UFE0024103

Chicago Manual of Style (16^th Edition):

Vigroux, Nicolas. “Approximate Methods for Evaluating Mode Mixity in Delaminated Composites.” 2009. Masters Thesis, University of Florida. Accessed December 12, 2019. http://ufdc.ufl.edu/UFE0024103.

MLA Handbook (7^th Edition):

Vigroux, Nicolas. “Approximate Methods for Evaluating Mode Mixity in Delaminated Composites.” 2009. Web. 12 Dec 2019.

Vancouver:

Vigroux N. Approximate Methods for Evaluating Mode Mixity in Delaminated Composites. [Internet] [Masters thesis]. University of Florida; 2009. [cited 2019 Dec 12]. Available from: http://ufdc.ufl.edu/UFE0024103.

Council of Science Editors:

Vigroux N. Approximate Methods for Evaluating Mode Mixity in Delaminated Composites. [Masters Thesis]. University of Florida; 2009. Available from: http://ufdc.ufl.edu/UFE0024103

Virginia Tech

22. Calata, Jesus Noel. Densification Behavior of Ceramic and Crystallizable Glass Materials Constrained on a Rigid Substrate.

Degree: PhD, Materials Science and Engineering, 2005, Virginia Tech

URL: http://hdl.handle.net/10919/27645

► Constrained sintering is an important process for many applications. The sintering process almost always involves some form of constraint, both internal and external, such as… (more)

▼ Constrained sintering is an important process for many applications. The sintering process almost always involves some form of constraint, both internal and external, such as rigid particles, reinforcing fibers and substrates to which the porous body adheres. The densification behavior of zinc oxide and cordierite-base crystallizable glass constrained on a rigid substrate was studied to add to the understanding of the behavior of various materials undergoing sintering when subjected to external substrate constraint. Porous ZnO films were isothermally sintered at temperatures between 900Â°C and 1050Â°C. The results showed that the densification of films constrained on substrates is severely reduced. This was evident in the sintered microstructures where the particles are joined together by narrower necks forming a more open structure, instead of the equiaxed grains with wide grain boundaries observed in the freestanding films. The calculated activation energies of densification were also different. For the density range of 60 to 64%, the constrained film had an activation energy of 391 Â± 34 kJ/mole compared to 242 Â± 21 kJ/mole for the freestanding film, indicating a change in the densification mechanism. In-plane stresses were observed during the sintering of the constrained films. Yielding of the films, in which the stresses dropped slight or remained unchanged, occurred at relative densities below 60% before the stresses climbed linearly with increasing density followed by a gradual relaxation. A substantial amount of the stresses remained after cooling. Free and constrained films of the cordierite-base crystallizable glass (glass-ceramic) were sintered between 900Â°C and 1000Â°C. The substrate constraint did not have a significant effect on the densification rate but the constrained films eventually underwent expansion. Calculations of the densification activation energy showed that, on average, it was close to 1077 kJ/mole, the activation energy of the glass, indicating that the prevailing mechanism was still viscous flow. The films expanded earlier and faster with increasing sintering temperature. The expansion was traced to the formation of pores at the interface with the silicon substrate and to a lesser extent on aluminum nitride. It was significantly reduced when the silicon substrate was pre-oxidized at 900Â°C, leading to the conclusion that the pore formation at the interface was due to poor wetting, which in turn was caused by the loss of the thin oxide layer through a reaction with the glass. Advisors/Committee Members: Lu, Guo-Quan (committeechair), Kampe, Stephen L. (committee member), Aning, Alexander O. (committee member), Meehan, Kathleen (committee member), Suchicital, Carlos T. A. (committee member).

Subjects/Keywords: zinc oxide; in-plane stress; ceramic; constrained sintering; rigid substrate; crystallizable glass

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

APA (6^th Edition):

Calata, J. N. (2005). Densification Behavior of Ceramic and Crystallizable Glass Materials Constrained on a Rigid Substrate. (Doctoral Dissertation). Virginia Tech. Retrieved from http://hdl.handle.net/10919/27645

Chicago Manual of Style (16^th Edition):

Calata, Jesus Noel. “Densification Behavior of Ceramic and Crystallizable Glass Materials Constrained on a Rigid Substrate.” 2005. Doctoral Dissertation, Virginia Tech. Accessed December 12, 2019. http://hdl.handle.net/10919/27645.

MLA Handbook (7^th Edition):

Calata, Jesus Noel. “Densification Behavior of Ceramic and Crystallizable Glass Materials Constrained on a Rigid Substrate.” 2005. Web. 12 Dec 2019.

Vancouver:

Calata JN. Densification Behavior of Ceramic and Crystallizable Glass Materials Constrained on a Rigid Substrate. [Internet] [Doctoral dissertation]. Virginia Tech; 2005. [cited 2019 Dec 12]. Available from: http://hdl.handle.net/10919/27645.

Council of Science Editors:

Calata JN. Densification Behavior of Ceramic and Crystallizable Glass Materials Constrained on a Rigid Substrate. [Doctoral Dissertation]. Virginia Tech; 2005. Available from: http://hdl.handle.net/10919/27645

Brno University of Technology

23. Kosek, Lukáš. Lomová houževnatost kovových materiálů a její zkoušení .

Degree: 2011, Brno University of Technology

URL: http://hdl.handle.net/11012/3601

► Cílem této práce je seznámení se s teoretickými základy lomové houževnatosti kovových materiálů a popisem jejího měření za podmínek rovinné deformace. V práci jsou uvedeny… (more)

Subjects/Keywords: Lomová houževnatost; rovinná deformace; faktor intenzity napětí; trhlina; lineární elastická lomová mechanika; zkušební těleso; Fracture toughness; plane strain; stress intensity factor; crack; linear elastic fracture mechanics; specimen

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

APA (6^th Edition):

Kosek, L. (2011). Lomová houževnatost kovových materiálů a její zkoušení . (Thesis). Brno University of Technology. Retrieved from http://hdl.handle.net/11012/3601

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):

Kosek, Lukáš. “Lomová houževnatost kovových materiálů a její zkoušení .” 2011. Thesis, Brno University of Technology. Accessed December 12, 2019. http://hdl.handle.net/11012/3601.

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

MLA Handbook (7^th Edition):

Kosek, Lukáš. “Lomová houževnatost kovových materiálů a její zkoušení .” 2011. Web. 12 Dec 2019.

Vancouver:

Kosek L. Lomová houževnatost kovových materiálů a její zkoušení . [Internet] [Thesis]. Brno University of Technology; 2011. [cited 2019 Dec 12]. Available from: http://hdl.handle.net/11012/3601.

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

Council of Science Editors:

Kosek L. Lomová houževnatost kovových materiálů a její zkoušení . [Thesis]. Brno University of Technology; 2011. Available from: http://hdl.handle.net/11012/3601

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

University of Florida

24. Stewart, Joel. Development of Yield Criteria for Describing the Behavior of Porous Metals with Tension-Compression Asymmetry.

Degree: PhD, Mechanical Engineering - Mechanical and Aerospace Engineering, 2009, University of Florida

URL: http://ufdc.ufl.edu/UFE0024779

► A significant difference between the behaviors in tension versus compression is obtained at the polycrystal level if either twinning or non-Schmid effects are included in… (more)

▼ A significant difference between the behaviors in tension versus compression is obtained at the polycrystal level if either twinning or non-Schmid effects are included in the description of the plastic deformation at the single crystal level. Examples of materials that exhibit tension-compression asymmetry include hexagonal close packed (HCP) polycrystals and intermetallics (e.g., molybdenum compounds). Despite recent progress in modeling the yield behavior of such materials, the description of damage by void growth remains a challenge. This dissertation is devoted to the development of macroscopic plastic potentials for porous metallic aggregates in which the void-free, or matrix, material displays tension-compression asymmetry. Using a homogenization approach, new analytical plastic potentials for a random distribution of voids are obtained. Both spherical and cylindrical void geometries are considered for void-matrix aggregates containing an isotropic matrix, while spherical voids are considered for the case of an anisotropic matrix material. The matrix plastic behavior in all cases is described by a yield criterion that captures strength differential effects and can account for the anisotropy that may be exhibited in the void-free material. For the case when the matrix material is isotropic, the developed analytical potentials for the void-matrix aggregate are sensitive to the second and third invariants of the stress deviator and display tension-compression asymmetry. Furthermore, if the matrix material has the same yield strength in tension and compression, the developed criteria reduce to the classical Gurson criteria for either spherical or cylindrical voids. It has also been demonstrated that the developed isotropic criterion for porous aggregates containing spherical voids captures the exact solution of a hollow sphere loaded in hydrostatic tension or compression. Finite element cell calculations with the matrix material obeying an isotropic yield criterion and displaying tension-compression asymmetry were performed and the comparison between finite element calculations and theoretical predictions demonstrate the versatility of the proposed formulations. A new anisotropic potential for the porous aggregate was also developed for the case when the matrix material is anisotropic and displays tension-compression asymmetry. If the matrix is isotropic, the proposed analytical anisotropic criterion reduces to the isotropic criterion developed in this dissertation for a void-matrix aggregate containing spherical voids. Comparison between finite element calculations and theoretical predictions show the predictive capabilities of the developed anisotropic formulation. The yield criteria developed in this dissertation are the only criteria available to capture the influence of damage by void growth in HCP metals and other materials that exhibit tension-compression asymmetry. ( en ) Advisors/Committee Members: Cazacu, Oana (committee chair), Sankar, Bhavani V. (committee member), Kim, Nam Ho (committee member), Boginski, Vladimir L. (committee member), Barlat, Frederic (committee member).

Subjects/Keywords: Asymmetry; Deformation; Hydrostatics; Matrix materials; Plane stress; Plastics; Porosity; Tensors; Velocity distribution; Yield strength; anisotropy, asymmetry, compression, constitutive, element, finite, gurson, porous, strength, tension, yield

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

APA (6^th Edition):

Stewart, J. (2009). Development of Yield Criteria for Describing the Behavior of Porous Metals with Tension-Compression Asymmetry. (Doctoral Dissertation). University of Florida. Retrieved from http://ufdc.ufl.edu/UFE0024779

Chicago Manual of Style (16^th Edition):

Stewart, Joel. “Development of Yield Criteria for Describing the Behavior of Porous Metals with Tension-Compression Asymmetry.” 2009. Doctoral Dissertation, University of Florida. Accessed December 12, 2019. http://ufdc.ufl.edu/UFE0024779.

MLA Handbook (7^th Edition):

Stewart, Joel. “Development of Yield Criteria for Describing the Behavior of Porous Metals with Tension-Compression Asymmetry.” 2009. Web. 12 Dec 2019.

Vancouver:

Stewart J. Development of Yield Criteria for Describing the Behavior of Porous Metals with Tension-Compression Asymmetry. [Internet] [Doctoral dissertation]. University of Florida; 2009. [cited 2019 Dec 12]. Available from: http://ufdc.ufl.edu/UFE0024779.

Council of Science Editors:

Stewart J. Development of Yield Criteria for Describing the Behavior of Porous Metals with Tension-Compression Asymmetry. [Doctoral Dissertation]. University of Florida; 2009. Available from: http://ufdc.ufl.edu/UFE0024779

Brigham Young University

25. Ness, Stanley J. Functionalization of In-plane Photonic Microcantilever Arrays for Biosensing Applications.

Degree: PhD, 2012, Brigham Young University

URL: https://scholarsarchive.byu.edu/cgi/viewcontent.cgi?article=4280&context=etd

► Microcantilevers have been investigated as high sensitivity, label free biosensors for approximately 15 years. In nearly all cases, a thin gold film deposited on the… (more)

▼ Microcantilevers have been investigated as high sensitivity, label free biosensors for approximately 15 years. In nearly all cases, a thin gold film deposited on the microcantilevers is used as an intermediate attachment layer because of the convenience of thiol-gold chemistry. Unfortunately, this attachment chemistry can be unstable when used with complex sample media such as blood plasma. The Nordin group at BYU has recently developed an all-silicon in-plane photonic microcantilever (PMCL) technology to serve as a platform for label-free biosensing. It has the advantage of being readily scalable to simultaneous readout of many PMCLs in array format, and allows integration with polymer microfluidics to facilitate the introduction of biological samples and reagents. An essential processing step for the transformation of the PMCL into a practical biosensor is the ability to effectively immobilize active biological receptors directly on silicon PMCL surfaces such that ligand binding generates sufficient surface stress to cause measureable PMCL deflection. This dissertation presents the development of a method to functionalize the sensor surface of all-silicon in-plane photonic microcantilever (PMCL) arrays. This method employs a materials inkjet printer for non-contact jetting and a fluid that is custom designed for ink-jetting and biological applications with approximately 1 pL droplet size. The method facilitates the application of different receptors on select PMCLs with drop placement accuracy in the +/- 7.5 μm range. The functionalization fluid facilitates further processing using humidity control to achieve full coverage of only the PMCL's top surface and removal of dissolved salts to improve uniformity of receptor coverage and to prevent fouling of the sensor surface. Once a functionalization method was successfully developed, a series of experiments were performed to investigate the amount of surface stress that can be generated when receptors are immobilized directly to the silicon surface. In one series of experiments, a 4.8 μM streptavidin solution was used with biotin immobilized on multiple PMCLs to demonstrate adsorption-induced surface stress and concomitant deflection of the PMCL. The group observed ~ 15 nm PMCL deflection on average, with a corresponding surface stress of approximately 4 mN/m. These experiments yield the sensor response in real-time and employ a combination of multiple PMCLs functionalized as either sensors or unfunctionalized to serve as references. Investigation of various attachment chemistries is included, as well as a comparison with and without passivation of non-sensor surfaces. Investigated passivation strategies prevented ligand binding from generating a differential surface stress. Failure modes and physical mechanisms for adsorption-induced surface stress are discussed. Immobilization and passivation strategies for antibody-based biosensing are demonstrated with fluorescence microscopy and a corresponding PMCL sensing experiment using rabbit anti-goat F(ab') fragments as the…

Subjects/Keywords: microcantilever; inkjet functionalization; in-plane photonic transduction; photonic microcantilever; biosensor; PDMS microfluidics; streptavidin; biotin; organosilane; CVD; antibody fragment immobilization; F(ab') fragment; adsorption-induced surface stress; Electrical and Computer Engineering

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

APA (6^th Edition):

Ness, S. J. (2012). Functionalization of In-plane Photonic Microcantilever Arrays for Biosensing Applications. (Doctoral Dissertation). Brigham Young University. Retrieved from https://scholarsarchive.byu.edu/cgi/viewcontent.cgi?article=4280&context=etd

Chicago Manual of Style (16^th Edition):

Ness, Stanley J. “Functionalization of In-plane Photonic Microcantilever Arrays for Biosensing Applications.” 2012. Doctoral Dissertation, Brigham Young University. Accessed December 12, 2019. https://scholarsarchive.byu.edu/cgi/viewcontent.cgi?article=4280&context=etd.

MLA Handbook (7^th Edition):

Ness, Stanley J. “Functionalization of In-plane Photonic Microcantilever Arrays for Biosensing Applications.” 2012. Web. 12 Dec 2019.

Vancouver:

Ness SJ. Functionalization of In-plane Photonic Microcantilever Arrays for Biosensing Applications. [Internet] [Doctoral dissertation]. Brigham Young University; 2012. [cited 2019 Dec 12]. Available from: https://scholarsarchive.byu.edu/cgi/viewcontent.cgi?article=4280&context=etd.

Council of Science Editors:

Ness SJ. Functionalization of In-plane Photonic Microcantilever Arrays for Biosensing Applications. [Doctoral Dissertation]. Brigham Young University; 2012. Available from: https://scholarsarchive.byu.edu/cgi/viewcontent.cgi?article=4280&context=etd

University of Florida

26. Li, Ming. On the instabilities resulting from a nonassociated flow rule.

Degree: 1993, University of Florida

URL: http://ufdc.ufl.edu/UF00090915

Subjects/Keywords: Deformation; Engineering; Geologic deformation; Plane stress; Plasticity; Plastics; Shear stress; Triaxial stress; Uniqueness; Wedge bodies

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APA (6^th Edition):

Li, M. (1993). On the instabilities resulting from a nonassociated flow rule. (Thesis). University of Florida. Retrieved from http://ufdc.ufl.edu/UF00090915

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):

Li, Ming. “On the instabilities resulting from a nonassociated flow rule.” 1993. Thesis, University of Florida. Accessed December 12, 2019. http://ufdc.ufl.edu/UF00090915.

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

MLA Handbook (7^th Edition):

Li, Ming. “On the instabilities resulting from a nonassociated flow rule.” 1993. Web. 12 Dec 2019.

Vancouver:

Li M. On the instabilities resulting from a nonassociated flow rule. [Internet] [Thesis]. University of Florida; 1993. [cited 2019 Dec 12]. Available from: http://ufdc.ufl.edu/UF00090915.

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

Council of Science Editors:

Li M. On the instabilities resulting from a nonassociated flow rule. [Thesis]. University of Florida; 1993. Available from: http://ufdc.ufl.edu/UF00090915

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

University of Florida

27. Vaghar, Mohammed Reza, 1965-. Stress analysis of superconducting magnets.

Degree: PhD, Aerospace Engineering, Mechanics, and Engineering Science, 1996, University of Florida

URL: http://ufdc.ufl.edu/AA00034659

Subjects/Keywords: Axial stress; Boundary conditions; Fourier Bessel transformations; Greens function; Magnetism; Magnets; Plane stress; Shear stress; Stress functions; Superconducting magnets; Green's functions; Strains and stresses – Mathematical models

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

APA (6^th Edition):

Vaghar, Mohammed Reza, 1. (1996). Stress analysis of superconducting magnets. (Doctoral Dissertation). University of Florida. Retrieved from http://ufdc.ufl.edu/AA00034659

Chicago Manual of Style (16^th Edition):

Vaghar, Mohammed Reza, 1965-. “Stress analysis of superconducting magnets.” 1996. Doctoral Dissertation, University of Florida. Accessed December 12, 2019. http://ufdc.ufl.edu/AA00034659.

MLA Handbook (7^th Edition):

Vaghar, Mohammed Reza, 1965-. “Stress analysis of superconducting magnets.” 1996. Web. 12 Dec 2019.

Vancouver:

Vaghar, Mohammed Reza 1. Stress analysis of superconducting magnets. [Internet] [Doctoral dissertation]. University of Florida; 1996. [cited 2019 Dec 12]. Available from: http://ufdc.ufl.edu/AA00034659.

Council of Science Editors:

Vaghar, Mohammed Reza 1. Stress analysis of superconducting magnets. [Doctoral Dissertation]. University of Florida; 1996. Available from: http://ufdc.ufl.edu/AA00034659

Virginia Tech

28. Zhu, Ning. Planar metallization failure modes in integrated power electtonics modules.

Degree: PhD, Electrical and Computer Engineering, 2006, Virginia Tech

URL: http://hdl.handle.net/10919/27530

► Miniaturizing circuit size and increasing power density are the latest trends in modern power electronics development. In order to meet the requirements of higher frequency… (more)

▼ Miniaturizing circuit size and increasing power density are the latest trends in modern power electronics development. In order to meet the requirements of higher frequency and higher power density in power electronics applications, planar interconnections are utilized to achieve a higher integration level. Power switching devices, passive power components, and EMI (Electromagnetic Interference) filters can all be integrated into planar power modules by using planar metallization, which is a technology involving electrical, mechanical, material, and thermal issues. By processing high dielectric materials, magnetic materials, or silicon chips using compatible manufacturing procedures, and by carefully designing structures and interconnections, we can realize the conventional discrete inductors, capacitors, and switch circuits with planar modules. Compared with conventional discrete components, the integrated planar modules have several advantages including lower profiles, better form factors, and less labor-intensive processing steps. In addition, planar interconnections reduce the wire bond inductive and resistive parasitic parameters, especially for high frequency applications. However, planar integration technology is a packaging approach with a large contact area between different materials. This may result in unknown failure mechanisms in power applications. Extensive research has already been done to study the performance, processing, and reliability of the planar interconnects in thin film structures. The thickness of the thin films used in integrated circuits (IC) or microelectronics applications ranges from the magnitude of nanometers to that of micrometers. In this work, we are interested in adopting planar interconnections to Integrated Power Electronics Modules (IPEM). In Integrated Power Electronics Modules (IPEMs), copper traces, especially bus traces, need to conduct current ranging from a few amps to tens of amps. One of the major differences between IC and IPEM is that the metal layer in IPEMs (normally >75Âµm) is much thicker than that of the thin films in IC (normally <1Âµm). The other major difference, which is also a feature of IPEM, is that the planar metallization is deposited on different brittle substrates. In active IPEM, switching devices are in a bare die form with no encapsulation. The copper deposition is on top of the silicon chips and the insulation polyimide layer. One of the key elements for passive IPEM and the EMI IPEM is the integrated inductor-capacitor (LC) module, which realizes equivalent inductors and capacitors in one single module. The deposition processes for silicon substrates and ceramic substrates are compatible and both the silicon and ceramic materials are brittle. Under high current and high temperature conditions, these copper depositions on brittle materials will cause detrimental failure spots. Over the last few years, the design, manufacture, optimization, and testing of the IPEMs has been developed and well documented. Up to this time , the… Advisors/Committee Members: van Wyk, Jacobus Daniel (committeechair).

Subjects/Keywords: Failure mode; Integrated power electronics modules; intrinsic residual stress; peel stress; Planar metallization; in-plane stress; thermo-mechanical stress; power cycling test; temperature cycling test

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APA (6^th Edition):

Zhu, N. (2006). Planar metallization failure modes in integrated power electtonics modules. (Doctoral Dissertation). Virginia Tech. Retrieved from http://hdl.handle.net/10919/27530

Chicago Manual of Style (16^th Edition):

Zhu, Ning. “Planar metallization failure modes in integrated power electtonics modules.” 2006. Doctoral Dissertation, Virginia Tech. Accessed December 12, 2019. http://hdl.handle.net/10919/27530.

MLA Handbook (7^th Edition):

Zhu, Ning. “Planar metallization failure modes in integrated power electtonics modules.” 2006. Web. 12 Dec 2019.

Vancouver:

Zhu N. Planar metallization failure modes in integrated power electtonics modules. [Internet] [Doctoral dissertation]. Virginia Tech; 2006. [cited 2019 Dec 12]. Available from: http://hdl.handle.net/10919/27530.

Council of Science Editors:

Zhu N. Planar metallization failure modes in integrated power electtonics modules. [Doctoral Dissertation]. Virginia Tech; 2006. Available from: http://hdl.handle.net/10919/27530

University of Florida

29. Roberts, Leonidas Howard, 1921-. Effect of an elliptic disk of orthotropic material on the stress distribution in an orthotropic plate.

Degree: 1958, University of Florida

URL: http://ufdc.ufl.edu/AA00035104

Subjects/Keywords: Boundary conditions; Circles; Elastic plates; Ellipses; Orthotropic plates; Parallel plates; Plane stress; Shear stress; Stress distribution; Stress functions; Elasticity; Mathematics thesis Ph. D

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

APA (6^th Edition):

Roberts, Leonidas Howard, 1. (1958). Effect of an elliptic disk of orthotropic material on the stress distribution in an orthotropic plate. (Thesis). University of Florida. Retrieved from http://ufdc.ufl.edu/AA00035104

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):

Roberts, Leonidas Howard, 1921-. “Effect of an elliptic disk of orthotropic material on the stress distribution in an orthotropic plate.” 1958. Thesis, University of Florida. Accessed December 12, 2019. http://ufdc.ufl.edu/AA00035104.

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

MLA Handbook (7^th Edition):

Roberts, Leonidas Howard, 1921-. “Effect of an elliptic disk of orthotropic material on the stress distribution in an orthotropic plate.” 1958. Web. 12 Dec 2019.

Vancouver:

Roberts, Leonidas Howard 1. Effect of an elliptic disk of orthotropic material on the stress distribution in an orthotropic plate. [Internet] [Thesis]. University of Florida; 1958. [cited 2019 Dec 12]. Available from: http://ufdc.ufl.edu/AA00035104.

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

Council of Science Editors:

Roberts, Leonidas Howard 1. Effect of an elliptic disk of orthotropic material on the stress distribution in an orthotropic plate. [Thesis]. University of Florida; 1958. Available from: http://ufdc.ufl.edu/AA00035104

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

Ohio University

30. Beegle, David J. Three-dimensional modeling of rigid pavement.

Degree: MS, Civil Engineering (Engineering), 1998, Ohio University

URL: http://rave.ohiolink.edu/etdc/view?acc_num=ohiou1176842076

Three-dimensional modeling of rigid pavement. Advisors/Committee Members: Sargand, Shad (Advisor).

Subjects/Keywords: Engineering, Civil; Twenty-Node Hexahedral Element; Simple Beam Theory; Normal Stress-Strain Curve; In-Plane Shear Stress-Strain Curves

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

APA (6^th Edition):

Beegle, D. J. (1998). Three-dimensional modeling of rigid pavement. (Masters Thesis). Ohio University. Retrieved from http://rave.ohiolink.edu/etdc/view?acc_num=ohiou1176842076

Chicago Manual of Style (16^th Edition):

Beegle, David J. “Three-dimensional modeling of rigid pavement.” 1998. Masters Thesis, Ohio University. Accessed December 12, 2019. http://rave.ohiolink.edu/etdc/view?acc_num=ohiou1176842076.

MLA Handbook (7^th Edition):

Beegle, David J. “Three-dimensional modeling of rigid pavement.” 1998. Web. 12 Dec 2019.

Vancouver:

Beegle DJ. Three-dimensional modeling of rigid pavement. [Internet] [Masters thesis]. Ohio University; 1998. [cited 2019 Dec 12]. Available from: http://rave.ohiolink.edu/etdc/view?acc_num=ohiou1176842076.

Council of Science Editors:

Beegle DJ. Three-dimensional modeling of rigid pavement. [Masters Thesis]. Ohio University; 1998. Available from: http://rave.ohiolink.edu/etdc/view?acc_num=ohiou1176842076

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