Relevant bibliographies by topics / Dynamic cracking / Dissertations / Theses
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Dissertations / Theses on the topic 'Dynamic cracking'

Author: Grafiati
Published: 24 August 2024

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1

Crump, Timothy. "Modelling dynamic cracking of graphite." Thesis, University of Manchester, 2018. https://www.research.manchester.ac.uk/portal/en/theses/modelling-dynamic-cracking-of-graphite(71e81d6f-e712-458c-aa48-0a256749258a).html.

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Advances in dynamic fracture modelling have become more frequent due to increases in computer speed, meaning that its application to industrial problems has become viable. From this, the author has reviewed current literature in terms of graphite material properties, structural dynamics, fracture mechanics and modelling methodologies to be able to address operational issues related to the ageing of Advanced Gas-cooled Reactor (AGR) cores. In particular, the experimentally observed Prompt Secondary Cracking (PSC) of graphite moderator bricks which has yet to be observed within operational react
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2

Fejzo, R. "Dynamic behaviour of concrete structures with cracking." Thesis, Swansea University, 1988. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.636965.

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The subject of this thesis is the behaviour of concrete structures under dynamic loading conditions and its modelling. In particular, the modelling of material behaviour is treated and a new material model for the description of plain concrete behaviour is proposed. For the modelling of the uncracked concrete behaviour, a strain rate sensitive elasto - viscoplastic material model developed by Bicanic is used. For the modelling of cracked concete behaviour, a distributed - smeared crack representation has been adopted. Crack initiation and propagation are controlled by a crack monitoring algori
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3

Marazzato, Frédéric. "Discrete element and time-integration methods forelasto-plasticity and dynamic cracking." Thesis, Paris Est, 2020. http://www.theses.fr/2020PESC1001.

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Cette thèse propose des contributions aux méthodes éléments discrets (MED) et à l’intégration temporelle explicite avec pour objectif applicatif les calculs de fissuration et de fragmentation pour des matériaux métalliques soumis à des chargements dynamiques. Les MED, qui sont traditionnellement utilisées pour simuler le comportement de matériaux granulaires, sont ré-interprétées à la lumière des méthodes de discrétisation de gradient afin d’être appliquées à la simulation de matériaux continus. Les maillages utilisables avec la MED proposée ont été étendus des maillages de Voronoi à des maill
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4

Beskari, Mohamed Ali. "Dynamic analysis of diffusion and convection in porous catalysts." Thesis, University of Salford, 1997. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.244857.

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5

Illes-Smith, Peter C. "A study of the modelling, dynamic simulation and control of the modern fluid catalytic cracking process." Thesis, University of Leeds, 1985. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.330143.

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6

Añez, Javier. "Modélisation de l'injection de pétrole pour les procédés FCC (Fluid Catalytic Cracking)." Thesis, Normandie, 2018. http://www.theses.fr/2018NORMR132/document.

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Cette thèse est une entreprise commune de VINCI Technologies et du laboratoire CNRS CORIA. De nombreux injecteurs comportent une zone de mélange interne dans laquelle les phases liquides et gazeuses sont toutes deux présentes dans une proportion significative. Par conséquent, cette zone appartient à la catégorie des écoulements diphasiques denses. Pour simuler la dispersion du liquide et caractériser le spray de ces injecteurs, des modèles appropriés sont nécessaires. Les points clés de cette approche sont la dispersion du liquide qui peut être associé au flux liquide turbulent et la quantité
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7

Castelo, Branco Veronica Teixeira Franco. "A unified method for the analysis of nonlinear viscoelasticity and fatigue cracking of asphalt mixtures using the dynamic mechanical analyzer." [College Station, Tex. : Texas A&M University, 2008. http://hdl.handle.net/1969.1/ETD-TAMU-3136.

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8

Pelissari, Daniel Cícero 1989. "Estudo da influência dos bicos injetores sobre o escoamento gás-sólido e as reações em um riser de FCC via CFD." [s.n.], 2015. http://repositorio.unicamp.br/jspui/handle/REPOSIP/266017.

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Orientador: Milton Mori<br>Dissertação (mestrado) - Universidade Estadual de Campinas, Faculdade de Engenharia Química<br>Made available in DSpace on 2018-08-27T17:58:36Z (GMT). No. of bitstreams: 1 Pelissari_DanielCicero_M.pdf: 3433960 bytes, checksum: 82461e75c8ef3d10fb44cd8d35de3eb9 (MD5) Previous issue date: 2015<br>Resumo: A aplicação de fluidodinâmica computacional (CFD) em estudos de otimização e projeto de novos equipamentos de processos industriais vem aumentando significativamente, uma vez que apresenta custo reduzido e possibilidade de avaliar equipamentos complexos e de extremas
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9

Wade, James. "Contact damage of ceramics and ceramic nanocomposites." Thesis, Loughborough University, 2017. https://dspace.lboro.ac.uk/2134/24932.

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Herein, we study the contact damage performance of two armour ceramics, alumina and silicon carbide, with varying microstructures and one particle-reinforced ceramic nanocomposite, alumina/silicon carbide, in an attempt to understand the microstructural mechanisms that affect plasticity and cracking under quasi-static and dynamic conditions. Quasi-static contact damage was imitated using Vickers indentation over a varying load regime. Numerical analysis of the indentation size effect, performed using the proportional specimen resistance model, allowed the contributions of plastic deformation a
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10

Eksi, Murat. "Optimization Of Mechanical And Microstructural Properties Of Weld Joints Between Aluminium-magnesium And Aluminium-magnesium-silicon Alloys With Different Thicknesses." Master's thesis, METU, 2013. http://etd.lib.metu.edu.tr/upload/12615649/index.pdf.

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For the last decades usage of aluminium alloys have been increasing tremendously. They have been used in aerospace industry widely and now aluminium alloys are becoming more and more popular in automotive and defense industries. Consequently<br>successful welding of aluminium alloys gains importance. In this study a research is carried out on eldability of plates having different thicknesses of composition 5754 aluminium and 6063 aluminium in T-fillet geometry using Gas-metal Arc Welding technique. It was aimed to have a successful joint without using pre-weld and post-weld heat treatments. Du
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11

Sjöström, Julia, and Helena Åkesson. "Investigation of Ductility Dip at 1000˚C in Alloy 617." Thesis, KTH, Materialvetenskap, 2017. http://urn.kb.se/resolve?urn=urn:nbn:se:kth:diva-209823.

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Alloy 617 displays a ductility dip during straining at exactly 1000˚C, leading to brittle fracture. A sudden decrease in ductility appearing during Gleeble hot ductility tests of Ni-based superalloys is a well-known phenomenon, while its cause is unknown. Many mechanisms have been established as possible contributors to the issue, and in later years not one, but the simultaneous presence of several of these mechanisms were confirmed as the cause. The ductility dip leads to solid state cracking and a specific solid state cracking phenomenon known as ductility dip cracking is specifically common
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12

Darestani, Mostafa Yousefi. "Response of concrete pavements under moving vehicular loads and environmental effects." Thesis, Queensland University of Technology, 2007. https://eprints.qut.edu.au/16662/1/Mostafa_Yousefi_Darestani_Thesis.pdf.

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The need for modern transportation systems together with the high demand for sustainable pavements under applied loads have led to a great deal of research on concrete pavements worldwide. Development of finite element techniques enabled researchers to analyse the concrete pavement under a combination of axle group loadings and environmental effects. Consequently, mechanistic approaches for designing of concrete pavements were developed based on results of finite element analyses. However, unpredictable failure modes of concrete pavements associated with expensive maintenance and rehabilitatio
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Darestani, Mostafa Yousefi. "Response of concrete pavements under moving vehicular loads and environmental effects." Queensland University of Technology, 2007. http://eprints.qut.edu.au/16662/.

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The need for modern transportation systems together with the high demand for sustainable pavements under applied loads have led to a great deal of research on concrete pavements worldwide. Development of finite element techniques enabled researchers to analyse the concrete pavement under a combination of axle group loadings and environmental effects. Consequently, mechanistic approaches for designing of concrete pavements were developed based on results of finite element analyses. However, unpredictable failure modes of concrete pavements associated with expensive maintenance and rehabilitatio
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Àlvarez, Castro Helver Crispiniano 1984. "Análise de variáveis de processo via CFD visando aperfeiçoamento de performance em riser de FCC." [s.n.], 2014. http://repositorio.unicamp.br/jspui/handle/REPOSIP/266067.

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Orientador: Milton Mori<br>Tese (doutorado) - Universidade Estadual de Campinas, Faculdade de Engenharia Química<br>Made available in DSpace on 2018-08-26T06:44:29Z (GMT). No. of bitstreams: 1 AlvarezCastro_HelverCrispiniano_D.pdf: 5280150 bytes, checksum: 96fb29e2849d11c06890186cb8af2f51 (MD5) Previous issue date: 2014<br>Resumo: Conversão de matéria-prima e rendimento são estudados através de um modelo 3D que simula o principal reator do processo de craqueamento catalítico fluidizado (FCC). Fluidodinâmica computacional (CFD) é usada como técnica com abordagem Euleriana-Euleriana para preve
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15

Yao, Lan. "Experimental and numerical study of dynamic crack propagation in ice under impact loading." Thesis, Lyon, 2016. http://www.theses.fr/2016LYSEI043/document.

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Les phénomènes liés au comportement à la rupture de la glace sous impact sont fréquents dans le génie civil, pour les structures offshore, et les processus de dégivrage. Pour réduire les dommages causés par l'impact de la glace et optimiser la conception des structures ou des machines, l'étude sur le comportement à la rupture dynamique de la glace sous impact est nécessaire. Ces travaux de thèse portent donc sur la propagation dynamique des fissures dans la glace sous impact. Une série d'expériences d'impact est réalisée avec un dispositif de barres de Hopkinson. La température est contrôlée p
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16

Novák, Jan. "Měření dynamických charakteristik zpětných armatur." Master's thesis, Vysoké učení technické v Brně. Fakulta strojního inženýrství, 2017. http://www.nusl.cz/ntk/nusl-318147.

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Master thesis presents overview of existing types of check valves, their features, uses and issue called "cracking". Experimental part of this thesis focuses on the lift and swing check valves. Results of the measurement are evaluated from non-stationary flow point of view by developing and analyzing static and dynamic characteristics. This thesis takes into account losses and dynamic effects as main viewpoints. Two methods for measuring non-stationary velocities are used. Direct method called Gibson and indirect method laser doppler anemometry. Goal of the master thesis is to increase underst
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17

Marchenko, Arina. "Analyse multi-échelles de la viscoplasticité à froid et de la rupture différée du titane en relation avec ses teneurs en hydrogène et oxygène." Thesis, Paris, ENMP, 2015. http://www.theses.fr/2015ENMP0030/document.

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Le titane et ses alliages qui sont largement répandus dans l'industrie aéronautique, sont concernés par le fluage à température ambiante ce qui conduit à une réduction de la résistance et provoque le phénomène de rupture différée. Une partie des études montrent que ce comportement viscoplastique inhabituel à température ambiante est lié aux phénomènes d'interactions entre les dislocations et les atomes interstitiels comme l'hydrogène et l'oxygène, aussi appelés vieillissement statique et dynamique. Le but de cette étude à la fois expérimentale et numérique multi-échelle est de mieux comprendre
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18

Chantrait, Teddy. "Approche multiéchelle en espace et en temps pour la prévision des endommagements dans les structures composites soumises à un impact de faible énergie." Thesis, Lyon, INSA, 2014. http://www.theses.fr/2014ISAL0129/document.

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Les stratifiés composites sont de plus en plus utilisés dans les pièces de structures des aéronefs ce qui fait émerger de nouvelles problématiques comme celle des Impacts de Faible Energie (IFE). En effet, bien qu’ils possèdent des propriétés rapportées à leur masse très intéressantes ces matériaux peuvent être vulnérables aux petits chocs. Or, compte tenu des nombreux paramètres influents lors d’un tel impact (énergie, vitesse, stratification...), les essais actuellement majoritairement privilégiés à l’échelle industrielle sont long et coûteux. Ainsi, l’apport de la simulation numérique pourr
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19

Rey, Jérôme. "Mechanisms and kinetics of alkenes isomerization and cracking in chabazite zeolite quantified by constrained ab initio molecular dynamics." Thesis, Lyon, 2019. http://www.theses.fr/2019LYSEN049.

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Les catalyseurs d’hydrocraquage et d’hydroisomérization sont bifonctionnels, avec une fonction hydro-déshydrogénante et une fonction acide, une zéolithe protonée, pour isomériser et craquer les alcènes. Par dynamique moléculaire ab initio avancée, et avec prise en compte explicite des effets thermiques (300 – 500 K), nous avons étudié les mécanismes d’isomérisation et de craquage d’alcènes C7 dans la zéolithe chabazite dans le but d’obtenir des constantes de vitesse fiables et d’interpréter la distribution des produits.Par la méthode blue moon, nous avons établi les premiers profils d’énergie
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20

Shim, Sang-Hea. "The effect of fluid flow on the stress corrosion cracking of sensitized type 304 stainless steel in 0.01 M Na₂SO₄ solution at 250⁰C /." The Ohio State University, 1985. http://rave.ohiolink.edu/etdc/view?acc_num=osu1487264603216315.

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21

Alvarez, Guevara Kervin Alexander, and Chumpitaz Marco Fabricio Medina. "Análisis de la influencia de las secciones agrietadas en la respuesta a una solicitud sísmica en edificios regulares e irregulares multifamiliares de 5, 10 y 15 pisos en la ciudad de Lima." Bachelor's thesis, Universidad Peruana de Ciencias Aplicadas (UPC), 2020. http://hdl.handle.net/10757/653473.

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Esta investigación aborda la real influencia que tiene el agrietamiento de los elementos estructurales en la reducción de rigidez cuando se produce un evento sísmico. Para ello, en primer lugar, describió la realidad problemática, los antecedentes y generalidades previos acerca del tema para determinar qué tipo de edificación utilizar. En segundo lugar, el marco teórico expuso un conjunto de conceptos fundamentales necesarios para entender el agrietamiento del concreto, la obtención de la inercia efectiva, la irregularidad de edificaciones y se dio un repaso sobre las consideraciones de norma
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22

Lammens, Bastien. "Caractérisation de la décohésion dynamique des matériaux composites à matrice organique (CMO)." Electronic Thesis or Diss., Ecole centrale de Nantes, 2024. http://www.theses.fr/2024ECDN0007.

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Les matériaux composites stratifiés à matrice organique sont utilisés dans le domaine de l'aéronautique pour alléger la masse des structures. Cependant, lors d'un impact sur ce type de matériaux, différents mécanismes d'endommagements peuvent apparaître comme le délaminage. C'est un processus de décohésion macroscopique du milieu interlaminaire qui peut être caractérisé par GIC (ou KIC). La littérature montre une grande disparité dans les mesures du fait d’un découplageincomplet des effets du confinement de la résine par les fibres, des non linéarités de comportement et/ou des effets de vitess
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23

Jaafari, Chaimaa. "Effect of early age drying shrinkage on the seismic response of RC Structures." Thesis, Lyon, 2020. http://www.theses.fr/2020LYSEI113.

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Les structures en béton armé s'endommagent au cours de leur vie à cause de plusieurs facteurs : conditions thermiques, attaques chimiques, retrait, fluage, carbonatation, corrosion, etc. Ce processus d'endommagement débute dès les premiers jours de la vie de l'ouvrage et continue lors de son vieillissement. L'endommagement au jeune âge peut influencer significativement le comportement dynamique des structures en béton armé. En effet, la fréquence propre d'une structure, qui constitue un paramètre de dimensionnement, peut être fortement réduite à cause de cet endommagement. Afin de déterminer l
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Lopes, Gabriela Cantarelli. "Estudo computacional da dinâmica do escoamento reativo em risers industriais de FCC." [s.n.], 2012. http://repositorio.unicamp.br/jspui/handle/REPOSIP/266768.

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Orientadores: José Roberto Nunhez, Milton Mori<br>Tese (doutorado) - Universidade Estadual de Campinas, Faculdade de Engenharia Química<br>Made available in DSpace on 2018-08-19T13:23:00Z (GMT). No. of bitstreams: 1 Lopes_GabrielaCantarelli_D.pdf: 8625905 bytes, checksum: 794a296fe54b1d50d16cf187c232a454 (MD5) Previous issue date: 2012<br>Resumo: O craqueamento catalítico fluido (FCC) é um dos processos de maior importância da indústria do refino de petróleo, já que converte as frações pesadas de baixo valor comercial provenientes de outros processos de refino, em produtos comercialmente mai
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OLIVEIRA, Talles Caio Linhares de. "Modelagem e simulação de um reator de craqueamento térmico do 1,2-Dicloroetano." Universidade Federal de Campina Grande, 2014. http://dspace.sti.ufcg.edu.br:8080/jspui/handle/riufcg/526.

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Submitted by Johnny Rodrigues (johnnyrodrigues@ufcg.edu.br) on 2018-04-30T16:15:44Z No. of bitstreams: 1 TALLES CAIO LINHARES DE OLIVEIRA - DISSERTAÇÃO PPGEQ 2014..pdf: 2048638 bytes, checksum: 8906a39fa89dff7c77323f97499594a3 (MD5)<br>Made available in DSpace on 2018-04-30T16:15:44Z (GMT). No. of bitstreams: 1 TALLES CAIO LINHARES DE OLIVEIRA - DISSERTAÇÃO PPGEQ 2014..pdf: 2048638 bytes, checksum: 8906a39fa89dff7c77323f97499594a3 (MD5) Previous issue date: 2014-09<br>CNPq<br>O monômero cloreto de vinila (MVC), matéria prima usada para a obtenção do policloreto de vinila (PVC), é produzido
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Lucar, Monzón Edgar Manuel. "Estudo da dinâmica do escoamento gás-sólido em resfriadores de catalisador de FCC usando fluidodinâmica computacional (CFD)." Universidade Federal de São Carlos, 2017. https://repositorio.ufscar.br/handle/ufscar/8834.

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Submitted by Aelson Maciera (aelsoncm@terra.com.br) on 2017-06-05T18:05:00Z No. of bitstreams: 1 DissEMLM.pdf: 4999609 bytes, checksum: 95744c602244ec5bde3892ae1ab471e5 (MD5)<br>Approved for entry into archive by Ronildo Prado (ronisp@ufscar.br) on 2017-06-05T18:19:12Z (GMT) No. of bitstreams: 1 DissEMLM.pdf: 4999609 bytes, checksum: 95744c602244ec5bde3892ae1ab471e5 (MD5)<br>Approved for entry into archive by Ronildo Prado (ronisp@ufscar.br) on 2017-06-05T18:19:18Z (GMT) No. of bitstreams: 1 DissEMLM.pdf: 4999609 bytes, checksum: 95744c602244ec5bde3892ae1ab471e5 (MD5)<br>Made available in
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González, Silva Germán. "Metodologia para aplicar LES ao craqueamento catalítico fluido em um reator riser industrial." [s.n.], 2012. http://repositorio.unicamp.br/jspui/handle/REPOSIP/266671.

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Orientador: Milton Mori<br>Tese (doutorado) - Universidade Estadual de Campinas, Faculdade de Engenharia Química<br>Made available in DSpace on 2018-08-21T06:39:27Z (GMT). No. of bitstreams: 1 GonzalezSilva_German_D.pdf: 4427269 bytes, checksum: bb45c122c3faad0613f060ad4cbd3b61 (MD5) Previous issue date: 2012<br>Resumo: O objetivo principal desta tese é propor uma metodologia para aplicar simulação de grandes escalas (LES) em uma unidade de craqueamento catalítico industrial. Para atingir este objetivo, iniciou-se propondo uma metodologia para a construção da malha, sendo uma malha quase-uni
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Cuadros, Bohórquez José Fernando. "Estratégia alternativa de otimização em duas camadas de uma unidade de craqueamento catalítico-FCC : implementação de algoritmos genéticos e metodologia híbrida de otimização." [s.n.], 2012. http://repositorio.unicamp.br/jspui/handle/REPOSIP/266651.

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Orientadores: Rubens Maciel Filho, Delba Nisi Cosme Melo<br>Tese (doutorado) - Universidade Estadual de Campinas, Faculdade de Engenharia Química<br>Made available in DSpace on 2018-08-21T11:54:20Z (GMT). No. of bitstreams: 1 CuadrosBohorquez_JoseFernando_D.pdf: 6686167 bytes, checksum: 1899259fbe648f651c06a5f9ca3e2c29 (MD5) Previous issue date: 2012<br>Resumo: Esta pesquisa teve por finalidade o desenvolvimento de uma metodologia de otimização em duas camadas. A otimização preliminar foi baseada na técnica de planejamento de experimentos junto com a metodologia por superfície de resposta co
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Akiki, Rana. "Développement d'un outil numérique pour la prévision de la fissuration d’une structure en béton de fibres sous impact." Thesis, Université Paris-Saclay (ComUE), 2017. http://www.theses.fr/2017SACLN056/document.

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Ce travail de recherche s'inscrit dans le cadre de la sécurité du transport et de manutention des colis de confinement de déchets nucléaires. Le but est de développer un outil numérique capable de simuler le comportement global d'une structure en béton de fibres soumise à des sollicitations dynamiques. Il permet également d'accéder à des informations plus locales telle que la fissuration, tant en terme de trajet que d'ouverture de fissures. Pour ce faire, un ensemble d'essais mécaniques est réalisé afin de mieux comprendre les mécanismes d'endommagement et de fissuration du matériau sous solli
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Almeida, Alexandre Barros de. "Análise e modelagem termodinâmica de um modelo de gás de rede para pontes líquidas." Universidade de São Paulo, 2012. http://www.teses.usp.br/teses/disponiveis/43/43134/tde-14032013-153056/.

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Nesta dissertação, estudou-se um modelo tipo gás de rede em três dimensões para simular sistemas líquidos macroscópicos. Aplicou-se o modelo para o estudo das energias e forças envolvidas durante o processo de formação e ruptura de pontes líquidas entre duas placas planas. Esse estudo foi motivado por processos fisiológicos que acontecem no interior dos pulmões dos mamíferos. Além disso, foi feito um estudo das propriedades termodinâmicas do modelo. Com relação a aplicação fisiológica, observou-se que, no processo da formação da ponte líquida, a energia livre da ponte líquida é menor que a en
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Jan, Yannick. "Modélisation de la propagation de fissure sur des structures minces, soumises à des sollicitations intenses et rapides, par la méthode X-FEM." Thesis, Lyon, 2016. http://www.theses.fr/2016LYSEI066/document.

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Actuellement, les méthodes classiques (éléments finis, endommagement, critère de rupture) pour analyser la tenue des structures sous des chargements extrêmes sont très dépendantes de la taille de maille du modèle et nécessitent à la fois un savoir-faire spé- cifique dans le domaine et des études de sensibilité au maillage. De nouvelles approches basées sur la méthode des éléments finis étendus permettent de traiter des propagations de fissure sur des structures de petites tailles et volumiques. Cependant, la propagation sur de grandes longueurs avec des modèles volumiques demande une puissance
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Cavalcanti, De Sousa Pedro. "Automated Protocol for the Analysis of Dynamic Mechanical Analyzer Date from Fine Aggregate Asphalt Mixes." 2010. http://hdl.handle.net/1969.1/ETD-TAMU-2010-08-8463.

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Fatigue cracking and moisture damage are two important modes of distresses in asphalt pavements. Recently, the Dynamic Mechanical Analyzer (DMA) was used to characterize fatigue cracking and evaluate the effects of moisture damage on the Fine Aggregate Matrix (FAM) portion of asphalt mixtures. The FAM specimens should be properly fabricated to represent the composition and structure of the fine portion of the mixture. The objective of the first phase of this study was to develop a standard test procedure for preparing FAM specimens such that it is representative of the mixture. The method co
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Yang, Chi, and 楊基. "Structural Evolution and Cracking Dynamics in 2D Cold Dusty Plasma Liquids." Thesis, 2015. http://ndltd.ncl.edu.tw/handle/86v396.

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博士<br>國立中央大學<br>物理學系<br>103<br>Microscopically, unlike intuitive expectation, the cold liquid around freezing is not completely disordered. The competition between the strong particle interaction and weak thermal agitation leads to the heterogeneous structure with coexisting crystalline ordered domains and surrounding defect clusters, and heterogeneous dynamics with alternating particle rattling in the caging wells of nearest neighbor particles and cooperative particle hopping which induces structural rearrangements. Namely, the cold liquid can be viewed as a patchwork of crystalline ordered d
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Pham, Hieu. "Environmetally Assisted Cracking in Metals under Extreme Conditions." Thesis, 2011. http://hdl.handle.net/1969.1/ETD-TAMU-2011-08-9671.

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Environmentally Assisted cracking (EAC) is a very critical materials science problem that concerns many technological areas such as petrochemical engineering, aerospace operations and nuclear power generation, in which cracking or sudden failure of materials may happen at stress far below the tensile strength. This type of corrosion is initiated at the microscopic level and is complicated due to the combination of chemistry (reaction caused by corrosive agents) and mechanics (varying load). As EAC is generally related to the segregation of impurity elements to defects (mainly grain boundaries)
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35

Wang, Wen, and 王彣. "Avalanche Cracking-Healing and Defect dynamics in Weakly Stressed Cold Dusty Plasma Liquids." Thesis, 2017. http://ndltd.ncl.edu.tw/handle/3tkq68.

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碩士<br>國立中央大學<br>物理學系<br>105<br>Under weak external stress, intermittent emergent responses in the form of avalanche type spatiotemporal clusters are ubiquitous phenomena in strongly coupled systems, such as granular systems, stressed solids, and seismic systems. The strong coupling not only sustains the structure from structural rearrangement but also spreads the local strain energy to remote regions inducing spatiotemporally correlated clusters once the accumulated local strain energy goes beyond a certain threshold. Unlike solids, under weak external stress, liquids exhibit plastic deformati
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36

Kreuzer, Steven Michael. "On the mechanical response of helical domains of biomolecular machines : computational exploration of the kinetics and pathways of cracking." Thesis, 2013. http://hdl.handle.net/2152/25156.

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Protein mechanical responses play a critical role in a wide variety of biological phenomena, impacting events as diverse as muscle contraction and stem cell differentiation. Recent advances in both experimental and computational techniques have provided the opportunity to explore protein constitutive properties at the molecular level. However, despite these advances many questions remain about how proteins respond to applied mechanical forces, particularly as a function of load magnitude. In order to address these questions, relatively simple helical structures were computationally tested to d
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