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Dissertations / Theses on the topic 'Triaxial'

Author: Grafiati
Published: 4 June 2021
Last updated: 25 July 2025

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1

Reid, Richard A. "Triaxial permeability device." Thesis, Georgia Institute of Technology, 1987. http://hdl.handle.net/1853/20036.

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2

Bonamigo, Mario. "Triaxial galaxy clusters." Thesis, Aix-Marseille, 2016. http://www.theses.fr/2016AIXM4717/document.

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Il est bien établit théoriquement et observationnellement que les amas de galaxies ne sont pas des objets sphèriques, et qu'ils sont beaucoup mieux décrits par la géométrie triaxiale. Malgré cela, les travaux sur la forme tri-dimensionnelle des amas de galaxies sont encore trés rares. L'objet de cette thèse est de contribuer à cette problématique naissante. L'originalité de ce travail est d'aborder ce sujet théoriquement et observationnellement. J'ai mesuré la forme d'amas de galaxies simulés, proposant des prédictions sur la forme des haloes de matière noire. J'ai ensuite développé un algorit
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3

El-Hage, Hassan M. "Digital triaxial testing system: Implementation of the digital triaxial testing system." Thesis, University of Ottawa (Canada), 1986. http://hdl.handle.net/10393/10673.

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4

MORIKAWA, SERGIO RICARDO KOKAY. "TRIAXIAL BRAGG GRATING ACCELEROMETER." PONTIFÍCIA UNIVERSIDADE CATÓLICA DO RIO DE JANEIRO, 2004. http://www.maxwell.vrac.puc-rio.br/Busca_etds.php?strSecao=resultado&nrSeq=5413@1.

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AGÊNCIA NACIONAL DE PETRÓLEO<br>TRANSMISSÃO DE ENERGIA ELÉTRICA S.A<br>Desde o final da década de 80 a indústria de fibras óticas têm passado por avanços consideráveis. Através de técnicas controladas, as fibras ópticas podem gerar sinais associados a uma vasta gama de grandezas físicas funcionando como sensores denominados de Sensores a Fibra Óptica (SFO s). Diversas técnicas podem ser empregadas para tal, e entre as existentes a baseada em redes de Bragg é a que mais tem se destacado. O interesse por transdutores empregando esta técnica se justifica pelas vantagens proporcionadas pel
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5

Frauendorf, Stefan, and J. Meng. "Tilted Rotation of Triaxial Nuclei." Forschungszentrum Dresden, 2010. http://nbn-resolving.de/urn:nbn:de:bsz:d120-qucosa-31369.

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The Tilted Axis Crankiug theory is applied to the model of two particles coupled to a triaxial rotor. Cornparirig with the exact quantal solutions, the interpretation and quality of the mean field approximations studied. Conditions are discussed when the axis of rotation lies inside or outside of the principal planes of the triaxial density distribution. The planar solutions represent ∆ I = 1 bands, whereas the aplanar solutions represent pairs of identical ∆ I = 1 bands with the same parity. The two bands differ by the chirality of the principal axes with respect to the angular momentum vecto
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6

Frauendorf, Stefan, M. Brack, and S. M. Reimann. "Triaxial shapes of sodium clusters." Forschungszentrum Dresden, 2010. http://nbn-resolving.de/urn:nbn:de:bsz:d120-qucosa-32199.

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7

Frauendorf, Stefan, and J. Meng. "Tilted Rotation of Triaxial Nuclei." Forschungszentrum Rossendorf, 1996. https://hzdr.qucosa.de/id/qucosa%3A21963.

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The Tilted Axis Crankiug theory is applied to the model of two particles coupled to a triaxial rotor. Cornparirig with the exact quantal solutions, the interpretation and quality of the mean field approximations studied. Conditions are discussed when the axis of rotation lies inside or outside of the principal planes of the triaxial density distribution. The planar solutions represent ∆ I = 1 bands, whereas the aplanar solutions represent pairs of identical ∆ I = 1 bands with the same parity. The two bands differ by the chirality of the principal axes with respect to the angular momentum vecto
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8

Frauendorf, Stefan, M. Brack, and S. M. Reimann. "Triaxial shapes of sodium clusters." Forschungszentrum Rossendorf, 1995. https://hzdr.qucosa.de/id/qucosa%3A22046.

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9

Ourives, Licínia. "Ensaio triaxial cíclico em agregados." Master's thesis, Universidade de Évora, 2012. http://hdl.handle.net/10174/14864.

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Este trabalho teve como principal objetivo o estudo de um equipamento para realização do ensaio triaxial cíclico. Trata-se de um ensaio que ainda não é realizado por empresas privadas, muito embora sobre ele se tenham desenvolvido alguns trabalhos iniciais ao nível da investigação. Neste trabalho pretende-se entender o funcionamento, limitações e capacidades do equipamento para, posteriormente realizar o ensaio de modo sistemático. Pôr a funcionar um equipamento totalmente desconhecido não foi tarefa fácil. Estudou-se o seu funcionamento e, pela realização de múltiplos testes, foi possível det
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10

LaVielle, Todd Hunter. "Liquefaction Susceptibility of Uncemented Calcareous Sands From Puerto Rico by Cyclic Triaxial Testing." Thesis, Virginia Tech, 2008. http://hdl.handle.net/10919/33044.

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Laboratory tests were performed to investigate the liquefaction susceptibility of uncemented calcareous sands. A series of isotropically consolidated undrained monotonic and cyclic triaxial tests were performed using the Playa Santa sand from Porto Rico. Playa Santa sand is a poorly graded calcareous clean beach sand composed of angular particles with large intra-granular voids. A series of consolidated undrained triaxial tests were performed with the Playa Santa sand remolded to a variety of relative densities and consolidated under a range of confining pressures. In addition, cyclic triaxi
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11

QUARESMA, HELENA DAHIA. "CUBICAL TRIAXIAL TESTS IN SATURATED SAND." PONTIFÍCIA UNIVERSIDADE CATÓLICA DO RIO DE JANEIRO, 1997. http://www.maxwell.vrac.puc-rio.br/Busca_etds.php?strSecao=resultado&nrSeq=2068@1.

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CONSELHO NACIONAL DE DESENVOLVIMENTO CIENTÍFICO E TECNOLÓGICO<br>Este trabalho apresenta um estudo experimental detalhado do comportamento tensão-deformação-resistência de uma areia saturada submetida a uma condição tridimensional de carregamento. Os ensaios foram realizados nos equipamentos triaxiais cúbico e convencional. O equipamento triaxial cúbico apresenta a vantagem de controlar a magnitude das três tensões principais independentemente ( sigma 1 , sigma 2 , sigma 3 ) sob condições drenada e não drenada. Para o desenvolvimento do trabalho foi utilizada uma amostra de areia cal
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12

Merheb, Antonio Hamilton Michel. "Análise mecânica do lastro ferroviário por meio de ensaios triaxiais cíclicos." Universidade de São Paulo, 2014. http://www.teses.usp.br/teses/disponiveis/3/3138/tde-20052015-160602/.

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Este trabalho faz parte de uma pesquisa voltada ao estudo do comportamento mecânico do sistema ferroviário e tem foco principal no estudo experimental em laboratório que visa avaliar as características do lastro ferroviário em condições de carga variadas e determinar a influência dos principais parâmetros que afetam o comportamento da estrutura. O material utilizado em camada de lastro ferroviário é normalmente constituído de frações granulométricas graúdas o que dificulta a execução de testes de grande escala em laboratório, devido à robustez necessária do equipamento para representar a corre
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13

Walsh, Thomas George. "The triaxial vane apparatus with stress control." Thesis, University of Ottawa (Canada), 2001. http://hdl.handle.net/10393/6305.

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The scope of this research has been two fold. The first stage was to develop a Tri Vane Apparatus. The Tri Vane Apparatus uses a miniature vane incorporated into a triaxial cell in order to study the use of the vane in different soils as well as allowing the effects of different vane parameters, such as rotation rate and vane geometry, to be studied in controlled conditions. Initial research was conducted into the history of this device with special emphasis on any previous designs. The design used in the current research has incorporated many design aspects used in these previous devices but
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14

Saussus, Denis. "Membrane contact patterns in triaxial sand specimens." Thesis, Georgia Institute of Technology, 1998. http://hdl.handle.net/1853/19518.

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15

Karami, Azzam Omar 1962. "Consolidation of clays using the triaxial apparatus." Thesis, The University of Arizona, 1988. http://hdl.handle.net/10150/276842.

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The calculation of a consolidation settlement is an important problem encountered in the foundation of buildings. Due to need for simplicity engineers are mainly using the one dimensional theory of Terzaghi for calculations of consolidation settlements with time. Consolidation tests are still performed in most laboratories with the traditional oedometer cell. Although the results of the oedometer can provide relatively reliable results, they are not equally effective for the calculation of the rate of consolidation. This primarily because of the inability of the oedometer cell to obtain full s
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16

Minaeian, Vida. "True triaxial testing of sandstones and shales." Thesis, Curtin University, 2014. http://hdl.handle.net/20.500.11937/1283.

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In this study deformational and failure properties of sandstones and shales have been evaluated through laboratory experiments under true triaxial stress conditions. The impacts of intermediate stress and water saturation were investigated. The results indicated that rock strength, elastic moduli, dilatancy behaviour, failure mode and fractures pattern are affected by both the minimum and intermediate principal stresses. Variable water saturation also influences mechanical response of shales. Finally, multistage true triaxial testing was used and examined.
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17

Soepandji, Budi Susilo. "Contribution à l'étude des propriétés mécaniques des marnes et argiles soumises à de fortes pressions." Châtenay-Malabry, Ecole centrale de Paris, 1986. http://www.theses.fr/1986ECAP0017.

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18

Ulloa, Calderon Alvaro. "Characteristics of dynamic triaxial testing of asphalt mixtures." abstract and full text PDF (UNR users only), 2009. http://0-gateway.proquest.com.innopac.library.unr.edu/openurl?url_ver=Z39.88-2004&rft_val_fmt=info:ofi/fmt:kev:mtx:dissertation&res_dat=xri:pqdiss&rft_dat=xri:pqdiss:1472985.

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19

John, James Daniel, and james d. john@gmail com. "An Adaptively Controlled MEMS Triaxial Angular Rate Sensor." RMIT University. Electrical and Computer Engineering, 2006. http://adt.lib.rmit.edu.au/adt/public/adt-VIT20070112.162019.

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Prohibitive cost and large size of conventional angular rate sensors have limited their use to large scale aeronautical applications. However, the emergence of MEMS technology in the last two decades has enabled angular rate sensors to be fabricated that are orders of magnitude smaller in size and in cost. The reduction in size and cost has subsequently encouraged new applications to emerge, but the accuracy and resolution of MEMS angular rate sensors will have to be greatly improved before they can be successfully utilised for such high end applications as inertial navigation. M
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20

Ossa, Tajura Getachew. "Behaviour of Keswick clay under triaxial compression conditions /." Title page, abstract and contents only, 1998. http://web4.library.adelaide.edu.au/theses/09ENS/09enso84.pdf.

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21

Li, Kim Mui S. T. "Pore pressure in concrete : theory and triaxial tests." Thesis, University of Cambridge, 1987. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.233289.

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22

MUNIZ, EUDES SIQUEIRA. "NEW METHODOLOGY FOR TESTING SHALES UNDER TRIAXIAL STRESSES." PONTIFÍCIA UNIVERSIDADE CATÓLICA DO RIO DE JANEIRO, 1998. http://www.maxwell.vrac.puc-rio.br/Busca_etds.php?strSecao=resultado&nrSeq=1535@1.

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COORDENAÇÃO DE APERFEIÇOAMENTO DO PESSOAL DE ENSINO SUPERIOR<br>Os folhelhos correspondem a mais de 75% das formações perfuradas para exploração de hidrocarbonetos e cerca de 90% dos problemas de instabilidade em poços de petróleo são atribuídos a ele. Segundo Steiger & Leung (1991), são gastos de 600 milhões a 1 bilhão de dólares anuais com custos adicionais de perfuração, gerados por problemas de instabilidade em poços. Este trabalho propõe uma nova metodologia de ensaio triaxial axissimétrico CIU em folhelhos, capaz de obter os parâmetros necessários para análises de instabilidade
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23

Kueh, Ahmad Beng Hong. "Thermo-mechanical properties of triaxial weave fabric composites." Thesis, University of Cambridge, 2008. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.612022.

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24

Sachania, Jalpesh. "Orbital decay in triaxial shaped dark matter haloes." Thesis, University of Leicester, 2010. http://hdl.handle.net/2381/30598.

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In cosmological simulations of structure formation of the universe, the dark matter halos in which galaxies are embedded in, are triaxial in shape. Simulations which focus in on galaxies in isolation do not use triaxial dark matter halos but use spherical shaped halos instead, as triaxial equilibrium models are hard to create.;Using a new method of creating initial conditions, which is able to create triaxial equilibrium models, the effect of using a triaxial halo in simulations of satellite accretion will be studied. In previous studies with a spherical shaped dark matter halo, the initial po
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25

Ambrose, Jasmin. "Failure of anisotropic shales under triaxial stress conditions." Thesis, Imperial College London, 2014. http://hdl.handle.net/10044/1/19270.

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Shales are highly anisotropic in their mechanical behaviour. The strength of anisotropic shales depends not only on the magnitude of the principal stresses, but also on the bedding plane orientations relative to the principal stresses. In this study, the failure of shales are investigated using triaxial compression and extension tests, while the role of intermediate stress (sigma2) on the strength of anisotropic shale is evaluated using data from new triaxial extension tests, as well as data from the literature. Triaxial compression and extension experiments were made on two organic-rich shale
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26

Sun, Mingkun Sun. "MULTISCALE HYBRID ELEMENT MODELING OF TRIAXIAL BRAIDED COMPOSITE." University of Akron / OhioLINK, 2018. http://rave.ohiolink.edu/etdc/view?acc_num=akron1533550804106857.

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27

Younessi, Sinaki Ahmad Reza. "Sand production simulation under true-triaxial stress conditions." Thesis, Curtin University, 2012. http://hdl.handle.net/20.500.11937/1133.

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Sand production in weakly consolidated sandstone reservoirs could result in damaging the production and surface facilities. Sanding includes two stages: the failure of sandstone around the borehole and sand grains being transported into the borehole. The first stage is related to stresses around the borehole whereas the second one is controlled by drawdown pressure. In order to avoid sanding, the stresses around the borehole and the drawdown pressure which initiate sanding are studied.This research simulated sand production through laboratory experiments and numerical simulations. The effect o
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28

Taghzouti, Abdellatif. "Comportement cyclique tridimensionnel des sols : Expérience et modélisation." Châtenay-Malabry, Ecole centrale de Paris, 1995. http://www.theses.fr/1995ECAP0442.

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L'objectif de ce travail est d'améliorer nos connaissances sur le comportement tridimensionnel des sols, utilisant un appareil triaxial vrai de l'École centrale de Paris, en particulier pour des sollicitations cycliques avec une rotation instantanée des directions principales des contraintes en conditions non drainées. L'analyse des résultats des essais triaxiaux tridimensionnels sur la kaolinite P300 et le sable d'hostun saturés, caractérise le rôle de la contrainte principale intermédiaire dans le cas des essais monotones suivant des chemins radiaux. Des relations entre les déformations prin
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29

Allmond, James Mitchell. "Studies of Triaxial Rotors and Band Mixing in Nuclei." Diss., Georgia Institute of Technology, 2007. http://hdl.handle.net/1853/14604.

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Rigid rotor models were investigated with constraints from data for even-even nuclei. Specifically, from precision gamma-ray intensity measurements for 166-Er (from 166m-Ho and 166-Tm beta decays); from B(E2) systematics; and for 186,188,190,192-Os matrix element data.
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30

Machado, Rubens Eduardo Garcia. "Dynamics of Barred Galaxies in Triaxial Dark Matter Haloes." Universidade de São Paulo, 2010. http://www.teses.usp.br/teses/disponiveis/14/14131/tde-02122011-111155/.

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Cosmological N-body simulations indicate that the dark matter haloes of galaxies should be generally triaxial. Yet, the presence of a baryonic disc is believed to modify the shape of the haloes. The goal of this thesis is to study how bar formation is affected by halo triaxiality and how, in turn, the presence of the bar influences the shape of the halo. We performed a series of collisionless and hydrodynamical numerical simulations, using elliptical discs as initial conditions. Triaxial halos tend to become more spherical and we show that part of the circularisation of the halo is due to disc
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31

Lira, Emidio Neto de Souza. "Sistema automático de aquisição de dados para ensaio triaxial." Universidade Federal do Rio de Janeiro, 1988. http://hdl.handle.net/11422/3805.

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Submitted by Fatima Fonseca (fatima.fonseca@sibi.ufrj.br) on 2018-04-02T18:09:26Z No. of bitstreams: 1 166994.pdf: 4545378 bytes, checksum: 4df5262da9d2e2751712c532e6401d06 (MD5)<br>Made available in DSpace on 2018-04-02T18:09:26Z (GMT). No. of bitstreams: 1 166994.pdf: 4545378 bytes, checksum: 4df5262da9d2e2751712c532e6401d06 (MD5) Previous issue date: 1988-07<br>Esta dissertação descreve inicialmente os componentes de sistemas de aquisição de dados baseados em microcomputadores, sua utilização em ensaios geotécnicos e as dificuldades que podem surgir com a implantação dos mesmos. Apres
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Machado, Rubens. "Dynamics of barred galaxies in triaxial dark matter haloes." Aix-Marseille 1, 2010. http://theses.univ-amu.fr.lama.univ-amu.fr/2010AIX11051.pdf.

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Des simulations cosmologiques à N-corps indiquent que les halos de matière noire des galaxies devraient être généralement triaxiaux. Pourtant, on croit que la présence d’un disque baryonique modifie la forme des halos. L’objectif de cette thèse est d’étudier comment la formation des barres est affectée par la triaxialité des halos et comment, à son tour, la présence de la barre influence la forme du halo. Nous réalisons un ensemble de simulations numériques non-collisionnelles et hydrodynamiques, utilisant des disques elliptiques comme conditions initiales. Les halos triaxiaux ont tendance à d
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33

Oancea, Alexandru (Alexandru Adrian) Carleton University Dissertation Engineering Civil and Environmental. "Triaxial compression of soils reinforced with discrete synthetic fibres." Ottawa, 1996.

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34

Song, Yongxiang. "Réalisation du système triaxial assisté par ordinateur et étude du cisaillement direct 3D pour joints rocheux." Grenoble 1, 1992. http://www.theses.fr/1992GRE10209.

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On presente dans cette these un systeme triaxial assiste par ordinateur et un appareillage de cisaillement direct pour joints rocheux. Ce systeme triaxial de revolution est constitue par une presse electromecanique commerciale et deux controleurs pression-volume, ainsi qu'un micro-ordinateur avec une carte d'acquisition (a/n, n/a et e/s). Ce systeme pilote par l'ordinateur peut realiser tous les essais triaxiaux asservis en deformation ou en contrainte, ainsi que des essais cycliques. Un nouvel essai en escalier, draine ou non draine, est presente. Ce type de chemin trouve son interet dans des
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Tadesse, Samuel. "Behaviour of saturated sand under different triaxial loading and liquefaction." Doctoral thesis, Norwegian University of Science and Technology, Department of Civil and Transport Engineering, 2000. http://urn.kb.se/resolve?urn=urn:nbn:no:ntnu:diva-2328.

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Mukasa, Jacob. "Aspects of triaxial testing and development of a learning system." Thesis, Norges teknisk-naturvitenskapelige universitet, Institutt for bygg, anlegg og transport, 2011. http://urn.kb.se/resolve?urn=urn:nbn:no:ntnu:diva-14526.

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The triaxial test is designed to measure the effective shear strength of the selected soil sample or solid. Normally, the sample shear strength is derived from the obtained parameters of the soil samples tested. Triaxial tests is very reliable because it can be used to measure strength of the material in both saturation and dry conditions, as well as both drained and undrained. Currently the new equipment has been developed by the geotechnical division of the Norwegian University of Science and Technology for triaxial testing of soil. The simplified and reliable procedures for the use of this
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Mathie, Merryn Joy Electrical Engineering &amp Telecommunications Faculty of Engineering UNSW. "Monitoring and interpreting human movement patterns using a triaxial accelerometer." Awarded by:University of New South Wales. School of Electrical Engineering and Telecommunications, 2003. http://handle.unsw.edu.au/1959.4/27386.

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This thesis addresses the hypothesis that a single, waist-mounted triaxial accelerometer (TA) can be used to monitor human movement patterns in unsupervised, freeliving subjects over extended periods, and that it can be used to quantitatively measure parameters that can provide clinical insight into the health status of the subject. A rigorous theoretical and experimental understanding of the signals obtained from a TA is developed. The effect of the placement of the TA device on the waist is explored and a model relating device position to TA signal is developed for a range of postures and ac
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Lau, W. H. W. "The behaviour of clay in simple shear and triaxial tests." Thesis, City University London, 1988. http://openaccess.city.ac.uk/8347/.

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The main objective of this work is to study the applications of critical state soil mechanics to simple shear testing. The problems with the simple shear apparatus and the approach for interpreting simple shear test results are described. Laboratory tests were conducted using the NGI simple shear apparatus, standard shear box arid computer controlled stress path testing equipment for samples with 38 mm and 100 mm diameter. The test programme comprised simple shear and shear box tests on remouled, reconstituted and undisturbed samples of Cowden till and London clay, undrained triaxial tests on
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FERREIRA, SUELI APARECIDA. "DEVELOPMENT OF A TRIAXIAL CELL FOR LABORATORY TESTS OF ROCKS." PONTIFÍCIA UNIVERSIDADE CATÓLICA DO RIO DE JANEIRO, 1997. http://www.maxwell.vrac.puc-rio.br/Busca_etds.php?strSecao=resultado&nrSeq=1933@1.

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COORDENAÇÃO DE APERFEIÇOAMENTO DO PESSOAL DE ENSINO SUPERIOR<br>Os maciços rochosos encontram-se submetidos a estados biaxiais e triaxiais de tensão. O conhecimento da deformabilidade e da resistência das rochas sob tais condições é fundamental para o cálculo da capacidade de suporte de fundações em rochas, projeto de barragens, mineração, prospecção e extração de petróleo, construção de túneis, etc. Para tanto, a realização de ensaios, quer sejam de campo ou de laboratório, é de grande valia. Devido à dificuldade de realização de ensaios biaxiais, e sendo a solicitação triaxial a mai
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PALACIOS, MIGUEL ANGEL PARODI. "BEHAVIOR OF A POLYPROPYLENE REINFORCED SAND UNDER TRIAXIAL EXTENSION TESTS." PONTIFÍCIA UNIVERSIDADE CATÓLICA DO RIO DE JANEIRO, 2012. http://www.maxwell.vrac.puc-rio.br/Busca_etds.php?strSecao=resultado&nrSeq=21788@1.

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COORDENAÇÃO DE APERFEIÇOAMENTO DO PESSOAL DE ENSINO SUPERIOR<br>O presente trabalho permite avaliar o comportamento de um solo reforçado e não reforçado com fibras de polipropileno (teor de 0.5 por cento em relação ao peso seco do solo) submetido a ensaios triaxiais de extensão, bem como a influência da adição de fibras na resistência e nos mecanismos de ruptura do solo reforçado. Para tanto, desenvolveu-se um programa experimental compreendendo a etapa final de um equipamento triaxial do tipo Bishop e Wesley de grandes dimensões e a execução de ensaios triaxiais drenados de extensão. Os ensai
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Ayan, Kathryn Donna June. "Undrained triaxial strength-deformation behavior of Harrison Bay Arctic silts." Thesis, Massachusetts Institute of Technology, 1985. http://hdl.handle.net/1721.1/67097.

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Thesis (M.S.)--Massachusetts Institute of Technology, Dept. of Civil Engineering, 1985.<br>MICROFICHE COPY AVAILABLE IN ARCHIVES AND ENGINEERING<br>Bibliography: leaves 238-241.<br>by Kathryn Donna June Ayan.<br>M.S.
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Corless, Virginia Leigh. "Light around darkness : gravitational lensing by triaxial galaxies & clusters." Thesis, University of Cambridge, 2009. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.611161.

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43

Younes, Ahmad. "Étude à l'appareil triaxial du module de déformation des sols." Lille 1, 1999. https://pepite-depot.univ-lille.fr/LIBRE/Th_Num/1999/50376-1999-177.pdf.

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Le présent travail comporte une étude expérimentale du module de déformation des sols dans la gamme des déformations (10-4 – 10-3). L'étude est réalisée à l'appareil triaxial suivant des chemins de chargement variés : drainé, non drainés, à pression moyenne constante et à déformations proportionnelles. Le rapport de thèse comporte trois chapitres : le premier chapitre présente une analyse bibliographique des travaux publies dans le domaine de petites déformations. Ces travaux ont été réalisés avec un certain nombre d'appareillage comme l'appareil triaxial, la machine de torsion et les disposit
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44

Li, Yuan. "Triaxial strongly deformed band and high spin states in 168Lu." Master's thesis, Mississippi State : Mississippi State University, 2003. http://library.msstate.edu/etd/show.asp?etd=etd-03132003-141252.

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45

Khatrush, Suleiman Ali. "The yielding of a fine sand in triaxial stress space." Thesis, University of Surrey, 1987. http://epubs.surrey.ac.uk/841582/.

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This thesis contains an experimental investigation of the yielding behaviour of sand loaded in triaxial compression, extension and a combination of both (stress reversal). The testing programme was conducted on 102 x 205 mm medium dense samples of fine Leighton Buzzard sand. A considerable part of the work was directed towards improving the testing technique in order to obtain good quality data. For this purpose, an automated stress path system was constructed and programmed utilizing a microcomputer to take full control of the applied stresses so that any desired stress path could be closely
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46

Chazallon, Cyrille. "Modélisation du comportement mécanique de géomatériaux cimentés." Châtenay-Malabry, Ecole centrale de Paris, 1996. http://www.theses.fr/1996ECAP0517.

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Afin de modéliser le comportement mécanique de géomatériaux cimentés sous chargements monotones, un modèle élastoplastique couplé avec un modèle élastique avec endommagement a été développé. Ce modèle va prendre en compte les aspects cohérents et frottant de ces matériaux. Les principes à la base du modèle sont présentés ainsi que l'interprétation physique des paramètres qui ont été utilisés. Afin d'illustrer les capacités du modèle à reproduire le comportement mécanique des géomatériaux cimentés, nous avons simulé des essais triaxiaux sur différents matériaux : une argile profonde cimentée do
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47

Naskos, Nicolas A. "Quelques aspects du comportement mécanique de l'argile saturée, consolidée sous fortes pressions." Châtenay-Malabry, Ecole centrale de Paris, 1985. http://www.theses.fr/1985ECAP0002.

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Cette étude ne fait qu'avancer certaines hypothèses ou constatations concernant le rôle de la pression de consolidation sur le comportement mécanique des argiles saturées, en les validant expérimentalement
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48

Malysz, Rodrigo. "Desenvolvimento de um equipamento triaxial de grande porte para avaliação de agregados utilizados como camada de pavimentos." reponame:Biblioteca Digital de Teses e Dissertações da UFRGS, 2009. http://hdl.handle.net/10183/19046.

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Camadas granulares desempenham um importante papel no comportamento global de pavimentos, especialmente daqueles com revestimentos delgados ou sem revestimento. Para conhecer as características de resistência e deformabilidade de materiais componentes dessas camadas são realizados ensaios triaxiais. No caso de ensaios em materiais granulares, o corpo de prova deve ter diâmetro de pelo menos cinco vezes o tamanho máximo de partícula e altura igual a duas vezes o seu diâmetro. Como as especificações do DNIT permitem o emprego de agregados de até 5 cm em camadas de brita graduada ou solo-agregado
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49

Homsi, Mahmoud. "Contribution à l'étude des propriétés mécaniques des sols en petites déformations à l'essai triaxial." Châtenay-Malabry, Ecole centrale de Paris, 1986. http://www.theses.fr/1986ECAP0009.

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Étude des séismes où les déformations sont très faibles pour le calcul de certains ouvrages de génie civil. Notions d'élasticité et lois de contact de Hertz et constantes élastiques pour différents types d'assemblage de billes de même diamètre afin de préciser les différents paramètres que les influents. Représentation par des modèles mathématiques du comportement des matériaux soumis aux charges cycliques, modèles définissant la relation entre le chargement et la réponse correspondante. Présentation de certains modèles souvent utilisés. Résultats obtenus sur divers matériaux (bille de verre,
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50

Hattab, Mahdia. "Étude expérimentale du comportement dilatant des argiles surconsolidées." Châtenay-Malabry, Ecole centrale de Paris, 1995. http://www.theses.fr/1995ECAP0437.

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La dilatance constitue une caractéristique très particulière des matériaux granulaires. On la définit comme étant la variation volumique négative (augmentation de volume) générée par l'augmentation de la partie déviatoire de la contrainte. L'objectif de cette étude est la compréhension et la caractérisation expérimentale du comportement dilatant d'argiles surconsolidées soumises à un chargement déviatoire. Le trajet de chargement choisi dans un premier temps est a contrainte moyenne constante. Ce chemin présente la particularité de pouvoir s'affranchir des variations de volume créés par la par
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