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Rozprawy doktorskie na temat „Strength anisotropy”

Autor: Grafiati

Data publikacji: 19 października 2024

Data aktualizacji: 31 lipca 2025

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1

O'Neill, Deirdre A. (Deirdre Anne). "Undrained strength anisotropy of an overconsolidated thixotropic clay." Thesis, Massachusetts Institute of Technology, 1987. http://hdl.handle.net/1721.1/14634.

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2

Denli, Alper Kaan. "Effect Of Discontinuity Roughness And Anisotropy On Shear Strength." Master's thesis, METU, 2004. http://etd.lib.metu.edu.tr/upload/2/12604948/index.pdf.

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Discontinuity surfaces generally consist of undulations termed as roughness. It is well known that surface roughness plays an important role on the shear strength and shear behavior of discontinuities. However, the effect of roughness will not be the same when the direction of shearing changes. This effect causes variation of shear strength with shearing direction or in other words anisotropy on shear strength. In this thesis, an experimental study was performed to investigate the effect of roughness and anisotropy on shear strength. For this purpose, joint samples were prepared using a mode

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3

Modén, Carl. "Transverse anisotropy in softwoods : modelling and experiments /." Stockholm, 2006. http://urn.kb.se/resolve?urn=urn:nbn:se:kth:diva-3988.

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Tong, Chong-Sze. "Anisotropy in repulsion and dispersion forces between atoms in molecules." Thesis, University of Cambridge, 1988. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.278386.

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5

Catapano, Anita. "Stiffness and strength optimisation of the anisotropy distribution for laminated structures." Paris 6, 2013. http://www.theses.fr/2013PA066062.

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Cette thèse porte sur le développement d’une nouvelle stratégie pour l’analyse et la conception optimale de structures anisotropes par rapport à la rigidité et à la résistance. Nous considérons des structures avec une géométrie donné et caractérisés par un champ de rigidité et de résistance anisotropes et variables. Le travail a été divisé en trois parties. Dans la première partie nous présentons les différents concepts et instruments utilisé pour développer la recherche. Dans la deuxième partie nous proposons une formulation invariante, à travers la méthode polaire, de différents critères de

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6

Wang, Wenhai Zavaliangos Antonios. "Towards an improved understanding of strength and anisotropy of cold compacted powder /." Philadelphia, Pa. : Drexel University, 2007. http://hdl.handle.net/1860/1865.

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7

Galen, Steven Zavaliangos Antonios. "Path dependence and strength anisotropy of mechanical behavior in cold-compacted powders /." Philadelphia, Pa. : Drexel University, 2005. http://dspace.library.drexel.edu/handle/1860/438.

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8

Zdravkovic, Lidija. "The stress-strain-strength anisotropy of a granular medium under general stress conditions." Thesis, Imperial College London, 1996. http://hdl.handle.net/10044/1/8919.

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9

Ho, Man Lee. "Theoretical approach to quantify influence of inherent anisotropy on undrained steady state strength of sand /." View abstract or full-text, 2005. http://library.ust.hk/cgi/db/thesis.pl?CIVL%202005%20HO.

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10

Kurauchi, Martim Hideki Nakayama. "Uma abordagem de ensaio de resistência mecânica de carvão vegetal." Universidade de São Paulo, 2014. http://www.teses.usp.br/teses/disponiveis/3/3133/tde-28042015-110831/.

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A indústria de ferro e aço corresponde a cerca de 8% das emissões globais de CO2. O carvão vegetal é uma alternativa existente ao uso de carvão fóssil e coque na indústria metalúrgica e é utilizado em alguns altos fornos no Brasil. Embora possua algumas vantagens em termos de maior reatividade e menor teor de cinzas em relação ao coque, o carvão vegetal possui baixa resistência mecânica e alta friabilidade, dificultando o transporte, manuseio e os processos. Não existem normas para avaliar a resistência à compressão de carvão vegetal, e os métodos existentes empregados em outras pesquisas cons

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11

Ispir, Mustafa Erdem. "A Laboratory Study Of Anisotropy In Engineering Properties Of Ankara Clay." Master's thesis, METU, 2011. http://etd.lib.metu.edu.tr/upload/12613779/index.pdf.

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Anisotropy in engineering properties of soils occurs due to the depositional process forming the soil fabric and/or different directional stresses in soil history. This study investigates the anisotropy in undrained shear strength and drained compressibility of preconsolidated, stiff and fissured Ankara Clay. The compressibility behavior is determined using standard oedometer testing while the shear strength anisotropy is investigated through large diameter unconsolidated-undrained triaxial testing on undisturbed samples taken in vertical and horizontal directions from several deep excavation

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12

Noorian-Bidgoli, Majid. "Strength and deformability of fractured rocks." Doctoral thesis, KTH, Mark- och vattenteknik, 2014. http://urn.kb.se/resolve?urn=urn:nbn:se:kth:diva-155719.

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This thesis presents a systematic numerical modeling framework to simulate the stress-deformation and coupled stress-deformation-flow processes by performing uniaxial and biaxial compressive tests on fractured rock models with considering the effects of different loading conditions, different loading directions (anisotropy), and coupled hydro-mechanical processes for evaluating strength and deformability behavior of fractured rocks. By using code UDEC of discrete element method (DEM), a series of numerical experiments were conducted on discrete fracture network models (DFN) at an established r

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13

Ismael, Mohamed [Verfasser], Heinz [Akademischer Betreuer] Konietzky, Heinz [Gutachter] Konietzky, and Gonzales Jorge [Gutachter] Castro. "Inherent strength and stiffness anisotropy of laminated rocks / Mohamed Ismael ; Gutachter: Heinz Konietzky, Jorge Castro Gonzales ; Betreuer: Heinz Konietzky." Freiberg : Technische Universität Bergakademie Freiberg, 2019. http://d-nb.info/1226101070/34.

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14

Leung, Ho Yee. "The anisotropic small strain stiffness of completely decomposed tuff and its effects on deformations associated with excavations /." View abstract or full-text, 2005. http://library.ust.hk/cgi/db/thesis.pl?CIVL%202005%20LEUNG.

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15

Strickland, Julie N. "Anisotropic Nature of Radially Strained Metal Tubes." Thesis, University of North Texas, 2015. https://digital.library.unt.edu/ark:/67531/metadc822747/.

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Metal pipes are sometimes swaged by a metal cone to enlarge them, which increases the strain in the material. The amount of strain is important because it affects the burst and collapse strength. Burst strength is the amount of internal pressure that a pipe can withstand before failure, while collapse strength is the amount of external pressure that a pipe can withstand before failure. If the burst or collapse strengths are exceeded, the pipe may fracture, causing critical failure. Such an event could cost the owners and their customers millions of dollars in clean up, repair, and lost tim

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16

Dinh, Quoc Dan. "Brazilian test on anisotropic rocks." Doctoral thesis, Technische Universitaet Bergakademie Freiberg Universitaetsbibliothek "Georgius Agricola", 2011. http://nbn-resolving.de/urn:nbn:de:bsz:105-qucosa-76331.

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The present work describes investigations on the anisotropic strength behavior of rocks in the splitting tensile test (Brazilian test). Three transversely isotropic rocks (gneiss, slate and sandstone) were studied in the Lab. A total of more than 550 indirect tensile strength tests were conducted, with emphasis was placed on the investigation of the influence of the spatial position of anisotropic weakness plane to the direction of the load on the fracture strength and fracture or fracture mode. In parallel, analytical solutions were evaluated for stress distribution and developed 3D numerical

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17

Navarro, Fabiano Cabañas [UNESP]. "Influência da petrografia sobre a anisotropia à tensão de compressão e dilatação térmica de rochas ornamentais." Universidade Estadual Paulista (UNESP), 2006. http://hdl.handle.net/11449/103006.

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Made available in DSpace on 2014-06-11T19:32:21Z (GMT). No. of bitstreams: 0 Previous issue date: 2006-05-19Bitstream added on 2014-06-13T19:21:56Z : No. of bitstreams: 1 cabanasnavarro_f_dr_rcla.pdf: 4430700 bytes, checksum: a93015794da4e288862dea20ef0e01d3 (MD5)<br>Conselho Nacional de Desenvolvimento Científico e Tecnológico (CNPq)<br>Fundação de Amparo à Pesquisa do Estado de São Paulo (FAPESP)<br>Considerando um conjunto de 21 tipos de rochas utilizadas como revestimento e subdivididas em quatro conjuntos por afinidade da composição mineral (rochas carbonáticas, quartzosas, feldspáticas

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18

Reis, Rodrigo Martins. "Comportamento tensão-deformação de dois horizontes de um solo residual de gnaisse." Universidade de São Paulo, 2004. http://www.teses.usp.br/teses/disponiveis/18/18132/tde-06112006-163715/.

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Neste trabalho estuda-se o comportamento tensão-deformação de dois horizontes de um solo residual de gnaisse, pertencentes a um perfil típico da cidade de Viçosa-Minas Gerais, na condição saturada e sob diferentes valores de sucção. O estudo apóia-se em ensaios de caracterização física e mineralógica, em ensaios destinados às análises porosimétricas e morfológicas (lâminas delgadas), e em ensaios de compressão triaxial realizados em corpos de prova não saturados e saturados, estes sujeitos a diferentes direções de cisalhamento, em ambos solos, e distintas trajetórias de tensão, no solo jovem.

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19

Navarro, Fabiano Cabañas. "Influência da petrografia sobre a anisotropia à tensão de compressão e dilatação térmica de rochas ornamentais /." Rio Claro : [s.n.], 2006. http://hdl.handle.net/11449/103006.

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Orientador: Antonio Carlos Artur<br>Banca: Antenor Braga Paraguassú<br>Banca: José Eduardo Rodrigues<br>Banca: Maria Heloisa Barros de Oliveira Frascá<br>Banca: Peter Christian Hackspacher<br>Resumo: Considerando um conjunto de 21 tipos de rochas utilizadas como revestimento e subdivididas em quatro conjuntos por afinidade da composição mineral (rochas carbonáticas, quartzosas, feldspáticas e quartzo-feldspáticas) foram realizados ensaios tecnológicos para a determinação do coeficiente de dilatação térmica linear e da resistência à compressão uniaxial, bem como a anisotropia dessas propriedade

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20

Santos, Roberto Aguiar dos. "Comportamento anisotrópico de um solo laterítico compactado." Universidade de São Paulo, 2015. http://www.teses.usp.br/teses/disponiveis/18/18132/tde-22032016-104302/.

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A compactação de aterros pode gerar comportamento anisotrópico, a depender do teor de umidade de compactação, entre outros fatores. O principal objetivo deste estudo foi investigar alguns aspectos relacionados à anisotropia inerente induzida pela compactação de um solo laterítico. Após realizar a caracterização mineralógica, geotécnica e microestrutural deste solo, estudou-se a resistência ao cisalhamento, condutividade hidráulica, compressibilidade e deformabilidade. O solo estudado foi classificado como laterítico arenoso (LA\') e apresentou agregação relativa da ordem de 12%. A metodologia

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21

Nicolas, Elias Antonio. "Estudo de criterios de resistencia de materiais anisotropicos aplicados a madeira." [s.n.], 2006. http://repositorio.unicamp.br/jspui/handle/REPOSIP/257999.

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Orientador: Nilson Tadeu Mascia<br>Tese (doutorado) - Universidade Estadual de Campinas, Faculdade de Engenharia Civil, Arquitetura e Urbanismo<br>Made available in DSpace on 2018-08-07T08:37:01Z (GMT). No. of bitstreams: 1 Nicolas_EliasAntonio_D.pdf: 5212612 bytes, checksum: 6374b5ff3649878b30250be16c1a8e76 (MD5) Previous issue date: 2006<br>Resumo: Esta pesquisa refere-se ao estudo de critérios de resistência de materiais anisotrópicos, especialmente o critério tensorial de resistência de TSAI- WU, com aplicações teóricas e experimentais para a madeira. Neste sentido foi realizada uma rev

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22

Adel, Norelhayate. "Influence d'un adjuvant proteique sur la texture poreuse et les proprietes mecaniques et thermiques d'un beton cellulaire autoclave." Toulouse 3, 1987. http://www.theses.fr/1987TOU30219.

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Etude en vue de la realisation de murs legers, isolants, homogenes, l'anisotropie de structure pouvant augmenter la resistance vertical et diminuer la conductivite horizontale. Etude de l'effect d'un siliceux, poudre d'aluminium et eau, autoclave a 175**(o)c. Les resultats s'expliquent par la structure dissymetrique vis-a-vis de l'eau des molecules proteiques, hydrophobes d'un cote et hydrofuges de l'autre

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23

Anop, Hanna. "Directing through low ionic strength, free polymers and metallic nanoparticles the self-organization of viral rod-shaped colloids." Thesis, Bordeaux, 2020. http://www.theses.fr/2020BORD0119.

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Les bactériophages en forme de filament, en raison de leurs propriétés physiques uniques, telles que leur monodispersité en taille et leur haute stabilité colloïdale, sont largement utilisés en matière molle en tant que système modèle de bâtonnets colloïdaux. En dispersions aqueuses, l'auto-organisation de ces virus s’est révélée être essentiellement conduite par l’entropie, ce qui implique des interactions purement répulsives entre les particules virales. Dans cette thèse, en modifiant la nature des interactions entre les bâtonnets viraux, nous avons étudié leur auto-organisation en phase cri

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24

Speck, Kerstin. "Beton unter mehraxialer Beanspruchung." Doctoral thesis, Saechsische Landesbibliothek- Staats- und Universitaetsbibliothek Dresden, 2008. http://nbn-resolving.de/urn:nbn:de:bsz:14-ds-1216628091575-43714.

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Diese Arbeit basiert auf der Untersuchung von hochfesten und ultrahochfesten Betonen mit und ohne Fasern unter zwei- und dreiaxialer Druckbeanspruchung. Die Auswirkung der unterschiedlichen Betonzusammensetzung ist für verschiedene Beanspruchungen nicht gleich ausgeprägt, dennoch konnten grundlegende Zusammenhänge herausgearbeitet werden. Anhand der Bruchbilder konnten die drei Versagensmechanismen Druck-, Spalt- und Schubbruch identifiziert werden, deren Charakteristik über die Kalibrierung an vier speziellen Versuchswerten direkt in das Bruchkriterium einfließen. Dieses stellt eine Erweiteru

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25

Speck, Kerstin. "Beton unter mehraxialer Beanspruchung: Ein Materialgesetz für Hochleistungsbetone unter Kurzzeitbelastung." Doctoral thesis, Technische Universität Dresden, 2007. https://tud.qucosa.de/id/qucosa%3A23705.

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Diese Arbeit basiert auf der Untersuchung von hochfesten und ultrahochfesten Betonen mit und ohne Fasern unter zwei- und dreiaxialer Druckbeanspruchung. Die Auswirkung der unterschiedlichen Betonzusammensetzung ist für verschiedene Beanspruchungen nicht gleich ausgeprägt, dennoch konnten grundlegende Zusammenhänge herausgearbeitet werden. Anhand der Bruchbilder konnten die drei Versagensmechanismen Druck-, Spalt- und Schubbruch identifiziert werden, deren Charakteristik über die Kalibrierung an vier speziellen Versuchswerten direkt in das Bruchkriterium einfließen. Dieses stellt eine Erweiteru

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26

Huber, Marius. "Dynamique des grands glissements de terrain rocheux, modélisation numérique et études de cas en Himalaya." Electronic Thesis or Diss., Université de Lorraine, 2024. https://docnum.univ-lorraine.fr/ulprive/DDOC_T_2024_0083_HUBER.pdf.

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Les glissements de terrain sont un phénomène courant à la surface de la Terre. Ils représentent à la fois un risque naturel majeur pour les populations et les infrastructures, et un processus dominant dans l’érosion des pentes montagneuses et dans l'évolution des surfaces continentales. Les facteurs qui conditionnent et préparent les pentes avant de les conduire à s’effondrer sont multiples et comprennent, entre autres, les caractéristiques du matériau constitutif du versant ainsi que des facteurs externes tels que le climat et la sismicité. L’étude de ces facteurs est fondamentale pour pouvoi

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27

Rolo, Reinaldo. "The anisotropic stress-strain-strength behaviour of brittle sediments." Thesis, Imperial College London, 2004. http://hdl.handle.net/10044/1/8239.

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28

Karpuz, Pinar. "Investigation Of The Effects Of Equal Channel Angular Extrusion On Light Weight Alloys." Phd thesis, METU, 2012. http://etd.lib.metu.edu.tr/upload/12614036/index.pdf.

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Severe plastic deformation methods are of great interest in industrial forming applications, as they give rise to significant refinement in microstructures and improvements in mechanical and physical properties. In the &ldquo<br>Equal Channel Angular Extrusion (ECAE)&rdquo<br>, which is the most common method for production of ultrafine grained bulk samples, very high plastic strains are introduced into the bulk material without any change in cross section. This study is composed of two main parts. Part I focuses on the plastic deformation behavior of Al alloys by modeling ECAE with Msc. Marc

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29

Solas, Denis. "Anisotropie des propriétés mécaniques et endommagement des alliages Al-Zn-Mg-Cu." Grenoble INPG, 1997. http://www.theses.fr/1997INPG0226.

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Les toles fortes en alliage d'aluminium de la serie 7000 peuvent presenter une anisotropie des proprietes mecaniques (limite d'elasticite, ecrouissage et endommagement). Ces toles sont obtenues apres laminage a chaud, mise en solution, trempe, detensionnement et traitement de revenu. Dans un premier temps, nous avons caracterise la microstructure du materiau (structure granulaire, texture cristallographique, microstructure des joints de grains. . . ). L'anisotropie des proprietes mecaniques est determinee pour differents traitements de revenu par essai de traction. L'anisotropie de la limite d

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30

Todeschini, Rodrigo. "Ensaios uniaxiais e biaxiais para avalição de criterio de resistencia de materiais anisotropicos aplicado a madeira." [s.n.], 2009. http://repositorio.unicamp.br/jspui/handle/REPOSIP/257676.

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Orientador: Nilson Tadeu Mascia<br>Dissertação (mestrado) - Universidade Estadual de Campinas, Faculdade de Engenharia Civil, Arquitetura e Urbanismo<br>Made available in DSpace on 2018-08-12T16:59:12Z (GMT). No. of bitstreams: 1 Todeschini_Rodrigo_M.pdf: 5391907 bytes, checksum: 209282e318155e52af17d68ae99c2ffb (MD5) Previous issue date: 2009<br>Resumo: A realização de ensaios uniaxiais e biaxiais permite uma melhor compreensão do comportamento mecânico de um material que possui direções principais de resistência e é sem dúvida uma forma que pesquisadores encontraram para obter resultados c

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31

Fourmeau, Marion. "Characterization and Modelling of the Anisotropic Behaviour of High-Strength Aluminium Alloy." Doctoral thesis, Norges teknisk-naturvitenskapelige universitet, Institutt for konstruksjonsteknikk, 2014. http://urn.kb.se/resolve?urn=urn:nbn:no:ntnu:diva-23979.

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The purpose of the present study is to describe and characterize the anisotropic flow and fracture behaviour of a high-strength aluminium alloy. To this end, thick plates of AA7075-T651 aluminium alloy have been tested. Different specimen geometries were used to investigate various stress states. Each specimen was machined in different directions of the plate to enlighten the anisotropy of the material. For all tests, the plastic flow exhibited a slight anisotropy while the failure strain and failure modes showed a very important dependence to the loading direction. A microstructure analysis

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32

Yung, See Yuen. "Determination of shear wave velocity and anisotropic shear modulus of an unsaturated soil /." View abstract or full-text, 2004. http://library.ust.hk/cgi/db/thesis.pl?CIVL%202004%20YUNG.

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33

Schwenk-Ferrero, Aleksandra [Verfasser]. "Verfahren zur numerischen Loesung der Neutronentransportgleichung mit strenger Behandlung der anisotropen Streuung / Aleksandra Schwenk-Ferrero." Karlsruhe : KIT-Bibliothek, 2018. http://d-nb.info/1197077944/34.

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34

Idier, Jonathan. "Utilisation de nanomatériaux anisotropes pour l'élaboration d'électrodes transparentes conductrices." Thesis, Bordeaux, 2016. http://www.theses.fr/2016BORD0314/document.

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Ce travail de thèse est principalement dédié à la mise en forme et à l’utilisation de nano-objets unidimensionnels comme matériaux d’électrodes transparentes. Les nanofils d’argent font partie des candidats les plus prometteurs pour le remplacement de l’oxyde d’indium-étain, actuellement le plus répandu dans les dispositifs commerciaux. La forte instabilité des nanofils d’argent à l’oxydation est néanmoins un problème critique puisque les électrodes deviennent moins performantes en peu de temps. En premier lieu, la triphénylphosphine a été utilisée comme agent inhibant l’oxydation. Contraireme

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35

Simpson, Nathaniel Denis John. "An analysis of tensile strength, fracture initiation and propagation in anisotropic rock (gas shale) using Brazilian tests equipped with high speed video and acoustic emission." Thesis, Norges teknisk-naturvitenskapelige universitet, Institutt for petroleumsteknologi og anvendt geofysikk, 2013. http://urn.kb.se/resolve?urn=urn:nbn:no:ntnu:diva-24284.

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This study attempts to further our knowledge of fracture behaviour by establishing an experimental system that links tensile strength, fracture initiation and propagation of an anisotropic rock (Mancos Shale) using an integrated Brazilian Test Setup equipped with Acoustic Emission and High Speed Video. The unique experimental conguration was applied to an anisotropic gas shale (Mancos Shale) in addition to other petroleum related reservoir rocks (such as sandstone and chalk). The variation in tensile strength, fracture initiation location, propagation time and the failure pattern are examined

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36

Baumgarten, Lars. "Gesteinsmechanische Versuche und petrophysikalische Untersuchungen – Laborergebnisse und numerische Simulationen." Doctoral thesis, Technische Universitaet Bergakademie Freiberg Universitaetsbibliothek "Georgius Agricola", 2016. http://nbn-resolving.de/urn:nbn:de:bsz:105-qucosa-202612.

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Dreiaxiale Druckprüfungen können als Einstufenversuche, als Mehrstufenversuche oder als Versuche mit kontinuierlichen Bruchzuständen ausgeführt werden. Bei der Anwendung der Mehrstufentechnik ergeben sich insbesondere Fragestellungen hinsichtlich der richtigen Wahl des Umschaltpunktes und des optimalen Verlaufs des Spannungspfades zwischen den einzelnen Versuchsstufen. Fraglich beim Versuch mit kontinuierlichen Bruchzuständen bleibt, ob im Versuchsverlauf tatsächlich Spannungszustände erfasst werden, welche die Höchstfestigkeit des untersuchten Materials repräsentieren. Die Dissertation greift

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37

Zhai, Jinyuan. "Modeling Ductile Damage of Metallic Materials." University of Akron / OhioLINK, 2016. http://rave.ohiolink.edu/etdc/view?acc_num=akron1466471348.

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Mehrapour, Mohammad Hadi, and Mohammad Hadi Mehrapour. "Development of a Failure Criterion for Rock Masses Having Non-Orthogonal Fracture Systems." Diss., The University of Arizona, 2017. http://hdl.handle.net/10150/625679.

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Two new three-dimensional rock mass strength criteria are developed in this dissertation by extending an existing rock mass strength criterion. These criteria incorporate the effects of the intermediate principal stress, minimum principal stress and the anisotropy resulting from these stresses acting on the fracture system. In addition, these criteria have the capability of capturing the anisotropic and scale dependent behavior of the jointed rock mass strength by incorporating the effect of fracture geometry through the fracture tensor components. Another significant feature of the new rock m

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Svensson, Erik, and Marcus Wiechert. "Abrasiv nötning av polymerer tillverkade genom 3D-skrivning." Thesis, Högskolan i Skövde, Institutionen för ingenjörsvetenskap, 2015. http://urn.kb.se/resolve?urn=urn:nbn:se:his:diva-11124.

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Volvo Cars in Skövde manufacture and assemble Volvo engines. When attaching the ignition coil to all 4-cylinder engines, a special mounting tool is required. This mounting tool is currently manufactured from injection-molded polyoxymethylene (POM), a thermoplastic. It has been noted that the life span of the tool is shortened as a result of abrasive wear that occurs during the attachment process of the ignition coil. An investigation of the possibility of manufacturing the mounting tool with a 3D-printer is undertaken in cooperation with ÅF, a consultant to Volvo Cars. A literature study is fi

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Мартиненко, Володимир Геннадійович. "Розробка методів розрахунку елементів конструкцій із в'язкопружних композиційних матеріалів". Thesis, НТУ "ХПІ", 2018. http://repository.kpi.kharkov.ua/handle/KhPI-Press/37543.

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Дисертація на здобуття наукового ступеня кандидата технічних наук за спеціальністю 05.02.09 – динаміка та міцність машин. Національний технічний університет "Харківський політехнічний інститут", Харків, 2018 р. Дисертацію присвячено створенню нових методів опису та моделювання анізотропної в'язкопружності композиційних елементів конструкцій і машин. На підставі аналізу актуальних методик встановлено, що на даний момент не існує комплексного підходу до встановлення параметрів анізотропної в'язкопружності полімерних армованих композиційних матеріалів, а також моделювання їхньої механічної пове

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Мартиненко, Володимир Геннадійович. "Розробка методів розрахунку елементів конструкцій із в'язкопружних композиційних матеріалів". Thesis, НТУ "ХПІ", 2018. http://repository.kpi.kharkov.ua/handle/KhPI-Press/37542.

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Дисертація на здобуття наукового ступеня кандидата технічних наук за спеціальністю 05.02.09 – динаміка та міцність машин. Національний технічний університет "Харківський політехнічний інститут", Харків, 2018 р. Дисертацію присвячено створенню нових методів опису та моделювання анізотропної в'язкопружності композиційних елементів конструкцій і машин. На підставі аналізу актуальних методик встановлено, що на даний момент не існує комплексного підходу до встановлення параметрів анізотропної в'язкопружності полімерних армованих композиційних матеріалів, а також моделювання їхньої механічної пове

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Ismael, Mohamed. "Inherent strength and stiffness anisotropy of laminated rocks." Doctoral thesis, 2018. http://tubaf.qucosa.de/id/qucosa%3A32251.

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The variation of rock strength and stiffness, known as mechanical anisotropy, is expected at different scales: large (rock mass) - or small (intact rock) - scales. It is always mandatory for engineering applications built either on or in anisotropic rock masses to investigate the strength and deformation behavior of those masses. To achieve this goal, continuum-based constitutive models are presented to analyze the mechanical anisotropy. One of both implemented models is named ‘Transubi model’ which considers the transverse isotropic elasticity into bi-linear Mohr-Coulomb strain hardening/soft

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"EFFECT OF DISCONTINUITY ROUGHNESS AND ANISOTROPY ON SHEAR STRENGTH." Master's thesis, METU, 2004. http://etd.lib.metu.edu.tr/upload/2/12604948/index.pdf.

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Chang, Hao-Ting, and 張浩庭. "The Study of Perpendicular Magnetic Anisotropy, Annealing Effect, Coupling Strength in MgO/CoFeB/Nb/CoFeB/MgO." Thesis, 2013. http://ndltd.ncl.edu.tw/handle/99253624247953377618.

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碩士<br>大葉大學<br>電機工程學系<br>101<br>In this study, we deposited MgO / CoFeB / Nb, Nb / CoFeB / MgO and MgO / CoFeB / Nb / CoFeB / MgO by sputtering and grew synthetic antiferromagnetic structure. These three structures were changed ferromagnetic or non-magnetic layer thickness of the material, and in the hysteresis curves measured after annealing to explore the perpendicular anisotropy and magnetic coupling. Studies have shown that the structure after annealing, which found that the perpendicular magnetic anisotropy (PMA) of the top structure only exist in a CoFeB thickness range from 1.2 to 1.6 nm

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LU, ZHONG-CHENG, and 呂仲誠. "An investigation of the strength anisotropy for the stratified compacted laterite and its influence on the slope stability." Thesis, 1992. http://ndltd.ncl.edu.tw/handle/16218079774058323308.

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Dai, Feng Jr. "Dynamic Tensile, Flexural and Fracture Tests of Anisotropic Barre Granite." Thesis, 2010. http://hdl.handle.net/1807/26141.

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Granitic rocks usually exhibit strongly anisotropy due to pre-existing microcracks induced by long-term geological loadings. The understanding of anisotropy in mechanical properties of rocks is critical to a variety of rock engineering applications. In this thesis, the anisotropy of tension-related failure parameters involving tensile strength, flexural strength and Mode-I fracture toughness/fracture energy of Barre granite is investigated under a wide range of loading rates. Three sets of dynamic experimental methodologies have been developed using the modified split Hopkinson pressure bar sy

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"A Study on an In-Process Laser Localized Pre-Deposition Heating Approach to Reducing FDM Part Anisotropy." Master's thesis, 2016. http://hdl.handle.net/2286/R.I.40335.

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abstract: Material extrusion based rapid prototyping systems have been used to produceprototypes for several years. They have been quite important in the additive manufacturing field, and have gained popularity in research, development and manufacturing in a wide field of applications. There has been a lot of interest in using these technologies to produce end use parts, and Fused Deposition Modeling (FDM) has gained traction in leading the transition of rapid prototyping technologies to rapid manufacturing. But parts built with the FDM process exhibit property anisotropy. Many studies have be

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Singh, Jagdeep. "Strength prediction of anisotropic rocks." Thesis, 1988. http://localhost:8080/iit/handle/2074/5836.

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Shu-Cheng, Hsu, and 徐書政. "Determination of tensile strength of anisotropic rocks." Thesis, 2000. http://ndltd.ncl.edu.tw/handle/48442721119682106407.

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碩士<br>國立成功大學<br>資源工程學系<br>88<br>Abstract The tensile strength of anisotropic rocks is an important factor to control the failure of rock mass. Laboratory techniques to measure the tensile strength of rocks include the direct tensile test and indirect tensile tests. The direct tensile test is an appropriate method for determining the behavior of rocks under tension. However, the greatest difficulty in the direct tensile test is the gripping of the rock specimens. As a result, a number of indirect methods have been developed for determining the tensile strength of rocks. The most comm

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Su, Shi-Fon, and 蘇世豐. "ANISOTROPIC UNDRAINED STRESS-STRAIN-STRENGTH BEHAVIOR OF IVE SOILS." Thesis, 1993. http://ndltd.ncl.edu.tw/handle/23491290234178947130.

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碩士<br>國立臺灣科技大學<br>營建工程技術學系<br>81<br>A semi-empirical constitutive model is proposed in this paper for the undrained stress-strain-strength behavior of the cohesive soils in terms of the consolidation history, the anisotropy, the general stress state, and the simplicity to needed parameters. Totally, only three parameters are required this model namely, the shear strength in compression(S), the strength in extension(S), and the initial Young''s modulus(E). The accuracy of this model has been

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