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Dissertations / Theses on the topic 'Strain deformation effect'

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Published: 28 May 2022
Last updated: 31 July 2025

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1

James, Karen Elizabeth. "The effect of microscopic residual stress on the deformation of polycrystals." Thesis, University of Newcastle Upon Tyne, 2001. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.366782.

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2

Zughaer, Hussien Jasim. "The effect of high strain deformation on the compaction of metal powders." Thesis, University of Leeds, 1990. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.277591.

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3

Prentice, Catherine. "Effect of strain rate history on warm deformation of Interstitial Free (IF) steel." Thesis, University of Sheffield, 2001. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.392739.

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4

Diao, Hui. "Deformation behaviours of coarse-grained and nanocrystalline Mg-5wt% Al alloys." Thesis, Queensland University of Technology, 2011. https://eprints.qut.edu.au/46870/1/Hui_Diao%27s_Thesis.pdf.

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Magnesium alloys have been of growing interest to various engineering applications, such as the automobile, aerospace, communication and computer industries due to their low density, high specific strength, good machineability and availability as compared with other structural materials. However, most Mg alloys suffer from poor plasticity due to their Hexagonal Close Packed structure. Grain refinement has been proved to be an effective method to enhance the strength and alter the ductility of the materials. Several methods have been proposed to produce materials with nanocrystalline grain stru
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5

Макуха, Зінаїда Миколаївна, Зинаида Николаевна Макуха, Zinaida Mykolaivna Makukha, et al. "Strain Properties of Nanodimentional Thin Film Systems Based on Ag and Co." Thesis, Sumy State University, 2012. http://essuir.sumdu.edu.ua/handle/123456789/34874.

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The results of research strain deformation properties of thin films Ag, Co and two-layer film systems Ag/Co in the range of deformation l 0 – 1% were presented. The plastic deformation in Co layer caused a similar deformation in the entire film system, even if the strain range of Ag layer is not reached the limits of the transition elastic/plastic deformation. When you are citing the document, use the following link http://essuir.sumdu.edu.ua/handle/123456789/34874
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6

Torabiandehkordi, Noushin. "High and very high cycle fatigue behavior of DP600 dual-phase steel : correlation between temperature, strain rate, and deformation mechanisms." Thesis, Paris, ENSAM, 2017. http://www.theses.fr/2017ENAM0020/document.

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Ce travail vise à améliorer notre compréhension du comportement en fatigue à grand et très grand nombre de cycles d’un acier ferrito-martensitique dual phase, notamment les effets de la température et de la vitesse de déformation résultant de chargements cycliques à haute fréquence. L'effet de la fréquence sur la réponse en fatigue de l'acier DP600 a été étudié en effectuant des essais de fatigue sur une machine ultrasonique travaillant à 20 kHz et sur une machine conventionnelle travaillant à des fréquences inférieures à 100 Hz. Des études de fractographie et des observations microscopiques à
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7

Проценко, Сергій Іванович, Сергей Иванович Проценко та Serhii Ivanovych Protsenko. "Фізичні процеси і властивості наноструктурованих плівкових матеріалів із спін-залежним розсіюванням електронів". Thesis, Вид-во СумДУ, 2011. http://essuir.sumdu.edu.ua/handle/123456789/24361.

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Дисертацію присвячено встановленню взаємного зв’язку між електрофізичними (термічний коефіцієнт опору і коефіцієнт поздовжньої тензочутливості), магніторезистивними (магнітоопір, анізотропний магнітоопір, магнітодеформаційний ефект і гігантський магнітний опір), магнітооптичними (магнітооптичний ефект Керра, коерцетивність) властивостями і фізичними процесами у плівкових матеріалах на основі Co і Cu, Ag і Au; Cr і Fe та Cu і Fe із різним структурно-фазовим станом – тверді розчини, плівкові гранульовані сплави, багатошарові плівкові системи та мультишари, в яких зберігається індивідуальність ок
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8

Zhalehjoo, Negin. "Characterisation of the deformation behaviour of unbound granular materials using repeated load triaxial testing." Thesis, Federation University of Australia, 2018. http://researchonline.federation.edu.au/vital/access/HandleResolver/1959.17/166953.

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Unbound Granular Materials (UGMs) are used in the base/subbase layers of flexible pavements for the majority of roads around the world. The deterioration of pavements increases with the increase of traffic loadings. To ensure the long-term performance and serviceability of pavement structures through a realistic design, the precise evaluation and comprehensive characterisation of the resilient and permanent deformation behaviour of pavement materials are essential. The present PhD study aims to investigate the characterisation of the resilient and permanent deformation behaviour of four road b
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9

Laboisse, Jean-Jacques. "Influence de la temperature et de la vitesse de deformation sur le comportement des materiaux metalliques en dehors du domaine d'elasticite." Paris, ENSAM, 1988. http://www.theses.fr/1988ENAM0003.

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Le but de cette etude est la prevision des courbes contrainte deformation a une temperature donnee connaissant les courbes contrainte-deformation a temperature ambiante. Developpement d'une theorie d'heteroplasticite conduisant dans le cas d'ecrouissage a une relation integrale dans laquelle apparaissent les parametres "memoire" et "taux de plastification". Evolution de ces grandeurs avec la temperature et la vitesse de deformation. Comparaison avec des resultats experimentaux
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10

Jashari, Haki. "The effect of pressure afterload due to aortic coarctation on left ventricular function in children." Doctoral thesis, Umeå universitet, Medicin, 2016. http://urn.kb.se/resolve?urn=urn:nbn:se:umu:diva-128126.

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Background: Coarctation of the aorta (CoA) is a congenital heart disease which represents a narrowing of the proximal descending aorta, hence increasing pressure afterload to the left ventricle (LV). Conventional treatment of native CoA is surgical repair, however potential recurrence or other related complications e.g. aortic rupture, heart failure and cerebrovascular events are common. Thus, lifelong follow-up of these patients is required. Echocardiography is the most patient’s friendly method to evaluate CoA and in particular its effect on LV function. Moreover, the novel speckle tracking
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11

Avachat, Siddharth. "Experimental and numerical analyses of dynamic deformation and failure in marine structures subjected to underwater impulsive loads." Thesis, Georgia Institute of Technology, 2012. http://hdl.handle.net/1853/44904.

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The need to protect marine structures from the high-intensity impulsive loads created by underwater explosions has stimulated renewed interest in the mechanical response of sandwich structures. The objective of this combined numerical and experimental study is to analyze the dynamic response of composite sandwich structures and develop material-structure-property relations and design criteria for improving the blast-resistance of marine structures. Configurations analyzed include polymer foam core structures with planar geometries. A novel experimental facility to generate high-intensity under
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12

Kaijalainen, A. (Antti). "Effect of microstructure on the mechanical properties and bendability of direct-quenched ultrahigh-strength steels." Doctoral thesis, Oulun yliopisto, 2016. http://urn.fi/urn:isbn:9789526213491.

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Abstract The effect of austenite pancaking in the non-recrystallisation regime on microstructure and mechanical properties, especially bendability, was investigated in direct-quenched ultrahigh-strength strip steels with martensitic-bainitic microstructures. Lowering the finishing rolling temperature (FRT) increased total reduction in the non-recrystallisation region (R tot). Niobium microalloying increased Rtot while variations in C, Mn and Mo did not affect Rtot to the same extent as Nb. A decrease in the FRT increased the incidence of softer microstructures such as ferrite and granular bain
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13

Xie, Zhong Jian. "Effet élastocalorique dans le caoutchouc naturel." Thesis, Lyon, 2016. http://www.theses.fr/2016LYSEI025/document.

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Les effets caloriques représentent la capacité d’un matériau à voir son entropie varier sous l’effet d’une sollicitation externe et peuvent être utilisés pour des systèmes de refroidissement à l'état solide en remplacement (ou complément) des dispositifs traditionnels à base de fluides frigorifiques. Dans cette thèse, nous avons cherché à étudier l'effet élastocalorique du caoutchouc naturel. Après une présentation des différents matériaux caloriques et du caoutchouc naturel, le chapitre 2 détaille la caractérisation élastocalorique du caoutchouc naturel, et les résultats sont interprétés à pa
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14

Tanner, Albert Buck. "Modeling temperature and strain rate history effects in OFHC CU." Diss., Georgia Institute of Technology, 1998. http://hdl.handle.net/1853/17143.

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15

ZHOU, XIAO-WEI. "Contribution au comportement dynamique des materiaux metalliques : etude experimentale de l'alliage al-li en torsion et en compression, simulation numerique du processus de penetration a grande vitesse." Nantes, 1988. http://www.theses.fr/1988NANT2014.

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Etude experimentale sur les alliages al-li soumis a des essais de traction et de compression pour des vitesses de deformation comprises entre 10**(-4) et 310**(3) s**(-1) et de 10**(-3) a 210**(3) s**(-1) respectivement. Auparavant ces alliages ont ete traites thermiquement. Analyse de la sensibilite a la vitesse de deformation. Influence du mecanisme d'activation thermique sur le processus de deformation. Determination du mode de rupture. Analyse des facies de rupture pour les echantillons deformes en traction et de la formation des cellules de dislocation dans ceux deformes en compression. S
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16

Santos, Tiago dos. "Experimental characterization and constitutive modeling of viscoplastic effects in high strain-rate deformation of polycrystalline FCC metals." reponame:Biblioteca Digital de Teses e Dissertações da UFRGS, 2016. http://hdl.handle.net/10183/150625.

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O presente trabalho tem como objetivo a caracterização experimental e modelagem constitutiva do comportamento de metais CFC (Cúbicos de Face Centrada) policristalinos quando submetidos a altas taxas de deformação. O material empregado no desenvolvimento do trabalho é uma liga de alumínio comercialmente pura: o alumínio AA1050. No âmbito da presente investigação, os experimentos são conduzidos à temperatura ambiente. O desenvolvimento experimental tem por objetivo evidenciar as principais características constitutivas que descrevem o comportamento macroscópico desta classe de metais quando subm
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17

Zhao, Yixiang. "Effects of Laser Shock Peening on Residual Stress, Texture and Deformation Microstructure of Ti-6Al-4V Alloy." University of Cincinnati / OhioLINK, 2012. http://rave.ohiolink.edu/etdc/view?acc_num=ucin1353343745.

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18

Hasni, Abdellatif. "Etude des principales proprietes chimiques des solutions eau-chlorure de magnesium : application a la comprehension des phenomenes de corrosion sous contrainte de l'acier inoxydable austenitique 17-12-mo." Paris 6, 1988. http://www.theses.fr/1988PA066287.

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Etude du ph d'equilibre et du domaine d'acidite des solutions aqueuses de mgcl::(2) et de leur dependance vis-a-vis de la concentration et de la temperature des solutions. Analyse du comportement en corrosion sous tension de l'acier 17cr-12ni-2mo dans les solutions aqueuses de mgcl::(2) en fonction des differents parametres (concentration, temperature)
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19

Dressler, Bernhard. "Modélisation numérique des coques en grandes transformations : mise en oeuvre dans un environnement orienté objet." Châtenay-Malabry, Ecole centrale de Paris, 1997. http://www.theses.fr/1997ECAP0522.

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Ce mémoire est consacré à la dynamique des coques en grandes rotations. La théorie bidimensionnelle des coques est déduite du principe des travaux virtuels d'un milieu continu tridimensionnel en introduisant la cinématique de Mindlin. On obtient un système d'équations non-linéaires qui est linéarise par rapport aux déplacements de la surface moyenne ainsi que par rapport aux paramètres de rotation. La paramétrisation des grandes rotations par le vecteur de rotation est comparée à la paramétrisation directe par la matrice de rotation. En vue d'une discrétisation en éléments finis isoparamétriqu
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20

Regmi, Gaurav. "EFFECTS OF ADDITION OF LARGE PERCENTAGES OF FLY ASH ON LIQUEFACTION BEHAVIOR OF SAND." OpenSIUC, 2014. https://opensiuc.lib.siu.edu/theses/1461.

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The liquefaction resistance of a saturated medium sand with varying amount of non-plastic type F fly ash was evaluated by conducting cyclic triaxial tests. The test results were used to evaluate the effect of addition of various percentages of fly ash on the liquefaction resistance of Ottawa sand. The effect of cyclic shear stress and confining pressure on liquefaction resistance of the sand-fly ash mixtures was the main scope of this research. In addition, the Young's Modulus and Damping Ratio for sand-fly ash mixtures were also determined. A comprehensive experimental program was conducted i
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21

Kwon, Jonghan. "Characterization of deformation mechanisms in pre-strained NiAl-Mo composites and α-Ti alloy". The Ohio State University, 2012. http://rave.ohiolink.edu/etdc/view?acc_num=osu1343796987.

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22

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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23

Tanbakuei, Kashani Majid. "Effect of Forming Process on the Deformational Behaviour of Steel Pipes." Thesis, Université d'Ottawa / University of Ottawa, 2017. http://hdl.handle.net/10393/35914.

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Buried pipeline networks play a vital role in the transportation of oil and natural gas from centers of production to centers of consumption. A common manufacturing technique for such pipes is the UOE process, where a flat steel plate is first formed into a U shape, then into an O shape, welded at the seam, and mechanically expanded before being shipped on site. The UOE forming process deforms the pipe material plastically and induces residual strains in the pipe. Such pipes are commonly buried on side and then are pressurized under the high head of the fluids they convey which induce hoop st
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24

Louchnikov, Vadim. "A numerical investigation into the stress memory effect in rocks." Click here to access, 2004. http://hdl.handle.net/2440/37740.

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Reliable and inexpensive methods of in-situ stress measurement have been sought for more than 40 years. A number of non-destructive core-based methods of in-situ stress determination are currently available, among which Deformation Rate Analysis ' DRA ' and Acoustic Emissions ' AE ' method have the most promising potential due to their ability to measure stress as opposed to strain, which is measured by strain recovery techniques. The DRA and AE method are similar in their utilisation of a phenomenon termed Kaiser effect in the case of AE and deformation memory effect in the case of DRA. The K
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25

Gao, Peng. "Effects of sample orientation and processing temperature on dynamic recrystallization and mechanical behaviours of a Mg alloy under high strain-rate deformation." Thesis, The University of Sydney, 2016. http://hdl.handle.net/2123/16495.

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Mg alloys have been extensively investigated because they are promising engineering materials with a low density and high specific strengths. However, poor formability at low temperature has been a major obstacle limiting their widespread industrial applications. Recent investigations indicated that plastic deformation of Mg alloys at relatively high strain rates at high temperatures promotes dynamic recrystallization (DRX) and this substantially improves both their formability and mechanical properties. However, there are still some outstanding issues on DRX during high strain-rate deformatio
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26

Gao, Peng. "Effects of grain size, strain rate and temperature on the mechanical properties and microstructures of CrCoNi medium-entropy alloys." Thesis, The University of Sydney, 2021. https://hdl.handle.net/2123/25042.

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In conventional alloys, a single metallic element is used as the dominant constituent. For example, Fe is the major constituent of steels. Further alloying with small amounts of other elements is a common way to obtain different mechanical properties. About two decades ago, high-entropy alloys (HEAs) were introduced as a new class of alloys. It is believed that mixing multi-principal elements with different crystallographic structures and atomic sizes to a high degree can achieve single crystallographic structures. For example, one of the most commonly studied HEAs, CrMnFeCoNi, contains five e
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27

Shutov, Alexey. "Numerische Simulation des viskoplastischen Verhaltens metallischer Werkstoffe bei endlichen Deformationen." Doctoral thesis, Universitätsbibliothek Chemnitz, 2014. http://nbn-resolving.de/urn:nbn:de:bsz:ch1-qucosa-151214.

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In den letzten Jahrzehnten hat sich auf dem Gebiet der phänomenologischen Metallplastizität eine schleichende Revolution vollzogen. Dank der gestiegenen Rechenleistung, in Kombination mit ausgereiften numerischen Algorithmen, sind viele technisch relevante Problemstellungen einer zuverlässigen numerischen Analyse zugänglich gemacht worden. Beispielsweise ermöglicht die Metallumformsimulation, als häufigste Anwendung der Plastizitätstheorie, eine Analyse des Eigenspannungszustandes und der Rückfederung in plastisch umgeformten Halbzeugen und Bauteilen. Solche Simulationen sind für die Planung e
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28

Strömbro, Jessica. "Micro-mechanical mechanisms for deformation in polymer-material structures." Doctoral thesis, KTH, Hållfasthetslära (Inst.), 2008. http://urn.kb.se/resolve?urn=urn:nbn:se:kth:diva-4626.

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In this thesis, the focus has been on micro-mechanical mechanisms in polymer-based materials and structures. The first part of the thesis treats length-scale effects on polymer materials. Experiments have showed that the smaller the specimen, the stronger is the material. The length-scale effect was examined experimentally in two different polymers materials, polystyrene and epoxy. First micro-indentations to various depths were made on polystyrene. The experiments showed that length-scale effects in inelastic deformations exist in polystyrene. It was also possible to show a connection between
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29

Fredriksson, Per. "Modelling and simulation of plastic deformation on small scales : interface conditions and size effects of thin films." Doctoral thesis, Stockholm : Hållfasthetslära, Kungliga Tekniska högskolan, 2008. http://urn.kb.se/resolve?urn=urn:nbn:se:kth:diva-4652.

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30

Shutov, Alexey. "Numerische Simulation des viskoplastischen Verhaltens metallischer Werkstoffe bei endlichen Deformationen." Doctoral thesis, Universitätsverlag der Technischen Universität Chemnitz, 2013. https://monarch.qucosa.de/id/qucosa%3A20103.

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In den letzten Jahrzehnten hat sich auf dem Gebiet der phänomenologischen Metallplastizität eine schleichende Revolution vollzogen. Dank der gestiegenen Rechenleistung, in Kombination mit ausgereiften numerischen Algorithmen, sind viele technisch relevante Problemstellungen einer zuverlässigen numerischen Analyse zugänglich gemacht worden. Beispielsweise ermöglicht die Metallumformsimulation, als häufigste Anwendung der Plastizitätstheorie, eine Analyse des Eigenspannungszustandes und der Rückfederung in plastisch umgeformten Halbzeugen und Bauteilen. Solche Simulationen sind für die Planung e
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31

Cheng, Wentao. "In-plane shrinkage strains and their effects on welding distortion in thin-wall structures." Connect to resource, 2005. http://rave.ohiolink.edu/etdc/view?acc%5Fnum=osu1124049585.

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Thesis (Ph. D.)--Ohio State University, 2005.<br>Title from first page of PDF file. Document formatted into pages; contains xx, 268 p.; also includes graphics (some col.). Includes bibliographical references (p. 256-268). Available online via OhioLINK's ETD Center
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32

恵子, 名取, та Keiko Natori. "微細複合組織金属の変形機構および塑性加工性に関する研究". Thesis, https://doors.doshisha.ac.jp/opac/opac_link/bibid/BB12867122/?lang=0, 2014. https://doors.doshisha.ac.jp/opac/opac_link/bibid/BB12867122/?lang=0.

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ヘテロ構造組織を有する鉄・非鉄金属の組織形態に注目して,微視的構造やその挙動が巨視的現象(変形特性,成形性)として発現するメカニズムを解明することを目的とした.鉄系金属ではDual Phase型高張力鋼のスプリングバック現象のひずみ速度依存性,非鉄系金属では半凝固鋳造法と強ひずみ加工を組み合わせた亜共晶アルミニウム合金の衝撃後方押出し成形性に注目した.これらの検討によりいずれの試料においても,結晶粒界よりもスケールの大きいヘテロ構造に由来した変形機構が支配的であることが明らかになった.<br>博士(工学)<br>Doctor of Philosophy in Engineering<br>同志社大学<br>Doshisha University
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33

Gourdet, Sophie. "Étude des mécanismes de recristallisation au cours de la déformation à chaud de l'aluminium." Grenoble INPG, 1997. http://www.theses.fr/1997INPG4206.

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La recristallisation dynamique discontinue (germination et croissance) est peu observee dans les materiaux a forte energie de defaut d'empilement tels que l'aluminium. Pour ces derniers, deux autres modes de recristallisation sont susceptibles d'operer : la recristallisation dynamique continue (rdc - transformation des sous-grains en grains) et la recristallisation dynamique geometrique (rdg - produite par l'evolution des grains initiaux). Le principal objectif etait de mettre clairement en evidence et de mieux caracteriser la rdc. Des essais de compression uniaxiale ont ete effectues a differ
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34

Dauch, Christian. "Decrochements et chevauchements dans une zone de plate-forme : l'exemple du massif de la gresigne (aquitaine nord-orientale)." Toulouse 3, 1988. http://www.theses.fr/1988TOU30081.

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Presentation d'un modele de zone de decrochements et de chevauchements dans l'avant-pays nord de la chaine des pyrenees, massif de gresigne. Les macrostructures definissent le cadre tectonique general, les microstructures indiquent l'existence de deux directions principales de racourcissement qui se superposent. La structure du massif de la gresigne est une structure ecaillee de type duplex. Le mecanisme de deformation resulte de l'effet de coin forme par les decrochements limites convergents
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35

Pélosin, Véronique. "Dynamique de l'évolution structurale et spectroscopie mécanique de multicouches AgNi." Grenoble 1, 1993. http://www.theses.fr/1993GRE10121.

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Differents appareils ont ete adaptes a la spectroscopie mecanique de films minces autoportants ou adherents a un substrat. Les deux principaux dispositifs mis au point, tres performants et plurifonctionnels, sont un tensiodilatometre et une lame vibrante. Nous nous somme interesses a des multicouches agni a mailles deformees fabriquees par pulverisation cathodique. Les deux elements sont immiscibles et presentent un fort desaccord parametrique, 15%. La taille des grains est nanometrique. Nous avons etudie les differents stades de l'evolution microstructurale de ces materiaux, relaxation interf
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36

Cochrane, Christopher James. "Effect of Process Parameters on Deformation of Zr-2.5wt%Nb Alloy." Thesis, 2013. http://hdl.handle.net/1974/8417.

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Zirconium and its alloys are used extensively in the nuclear industry. In the Canadian Deuterium Uranium reactor, the primary containment in the primary coolant system is composed of Zr-2.5wt%Nb in the form of a pressure tube. The permissible chemical composition of Zr-2.5wt%Nb for use in the pressure tube in nuclear reactors is dictated by ASTMB353. Oxygen and iron are the highest content controlled elements in the standard alloy, after zirconium and niobium. Oxygen is an alpha-stabilizer, and diffuses preferentially to the alpha phase, leading to a well established increase in the yield stre
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37

Ku, Ming-Sheng, and 古明昇. "Effect of Temperature and Strain Rate on Plastic Deformation of 316 Stainless Steel." Thesis, 2001. http://ndltd.ncl.edu.tw/handle/58435772601840795730.

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碩士<br>國立臺灣大學<br>機械工程學研究所<br>89<br>The AISI 316 stainless steel is adopted as the specimen material in this study, exploring the influence of temperature and strain rate on flow stress. The temperature range is from room temperature to 800℃ and the strain rate range is from 0.001 to 500 . Using a Material Testing System, we conduct uniaxial-compression tests to obtain the stress-strain curves for this alloy. The experiment results exhibites that the trend of the flow stresses depends on the effects of work-hardening and work-softening. The interaction of dislocations is the major
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38

Chen, Nian-Tzu, and 陳念祖. "Effect of monotonic pre-strain on cyclic deformation behavior of 430F stainless steel." Thesis, 2009. http://ndltd.ncl.edu.tw/handle/35889212482968237822.

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碩士<br>國立嘉義大學<br>生物機電工程學系研究所<br>97<br>Abstract In this study, 430F stainless steel is employed to investigate the effects of pre-deformation on the mechanical properties, cyclic deformation behavior and fatigue lives because they are often profoundly altered after per-straining. Moreover, the pre-deformation induced by monotonic loading manner is selected as tensile pre-strain and three pre-strains of 5 % and 8 % are produced on the tested steel, respectively. In each case, applying the standard tension, the basic mechanical properties are determined from the monotonic loading stress-strain cu
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39

Prakash, Gurao Nilesh. "Some Critical Issues Pertaining To Deformation Texture In Close-Packed Metals And Alloys : The Effect Of Grain Size, Strain Rate And Second Phase." Thesis, 2010. https://etd.iisc.ac.in/handle/2005/1990.

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Crystallographic texture in polycrystalline materials are known to play an important role in tailoring suitable properties for various technological applications. In addition, the evolution of texture provides a profound basis to develop scientific understanding of physical processes occurring in the material during deformation and annealing. Between the two, the understanding of deformation texture is much broader. However, certain issues pertaining to the evolution of deformation texture evolution are yet to be explored or not uniquely agreed upon. A few notable examples are the effects o
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40

Prakash, Gurao Nilesh. "Some Critical Issues Pertaining To Deformation Texture In Close-Packed Metals And Alloys : The Effect Of Grain Size, Strain Rate And Second Phase." Thesis, 2010. http://hdl.handle.net/2005/1990.

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Crystallographic texture in polycrystalline materials are known to play an important role in tailoring suitable properties for various technological applications. In addition, the evolution of texture provides a profound basis to develop scientific understanding of physical processes occurring in the material during deformation and annealing. Between the two, the understanding of deformation texture is much broader. However, certain issues pertaining to the evolution of deformation texture evolution are yet to be explored or not uniquely agreed upon. A few notable examples are the effects o
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41

Shozen, Takahiro. "Deformation under the constant stress state and its effect on stress-strain behaviour of Fraser River Sand." Thesis, 2001. http://hdl.handle.net/2429/11452.

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This study was carried out to improve our understanding of the behaviour of Fraser River Sand during and after ageing The main objectives of this study are (a) the effects of ageing time under constant stress state on the stiffness of sand and (b) the effects of stress path during subsequent shear. Identical soil samples were aged under constant stresses for 1, 10, 100 and 1,000 minutes prior to shear along a variety of stress paths. The effects of the levels of confining stress and initial effective stress ratio on changes in stiffness due to ageing under a given stress path were also
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42

Chiu, Chien-Chang, and 邱健彰. "Structural Deformation and Strain Effect on Photonic Crystal Waveguide,Acousto-optic Interaction in Phoxonic Crystals Nano-beam Structure." Thesis, 2014. http://ndltd.ncl.edu.tw/handle/47172993483163033563.

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Dhal, Satyanarayan, and Raja Yadlapalli. "Effect of size and strain rate on deformation behaviour of Cu50Zr50 metallic glass: A molecular dynamics simulation study." Thesis, 2012. http://ethesis.nitrkl.ac.in/3349/1/final_thesis.pdf.

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Metallic glasses or amorphous metals have attracted considerable attention due to their unique properties and have been evolved as a potential field of research in recent years. The recent discovery of new glass-forming compositions makes it possible to produce metallic glasses in bulk shapes. Bulk metallic glasses provides a promising future to revolutionize the field of structural materials with combinations of strength, elastic limit, toughness, wear resistance and corrosion resistance. Some of their superior properties over crystalline metals have made them a versatile engineering material
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Mehta, Gaurav, and Hrushikesh Patra. "Effect of size, temperature and strain rate on deformation behavior of nickel nanowires: A molecular dynamics simulation study." Thesis, 2013. http://ethesis.nitrkl.ac.in/4903/1/109MM0448.pdf.

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Metallic Nanowires have attracted considerable attention due to their unique properties and have been evolved as a potential field of research in recent years. The recent discovery of new metallic nanomaterials makes it possible to produce nanometarials in bulk shapes. Bulk metallic nanowires provide a promising future to revolutionize the field of structural materials with combinations of strength, elastic limit, toughness, wear resistance and corrosion resistance. Since the fabrication and deformation studies of metallic nanowires are sometimes practically impossible in laboratory condition
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Bandyopadhyay, Hindol. "Effect Of Processing And Test Variables On The Deformation Characteristics Of Tantalum." Thesis, 2013. https://etd.iisc.ac.in/handle/2005/2595.

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The dependence of flow stress of body centered cubic metals on variables such as strain rate, temperature, strain and microstructural is a research area of continued interest. Recently, there has been renewed interest in deformation of fine grained BCC metals, which display characteristics that are different from their coarse-grained counterparts. Deformation mechanisms, strain-rate and temperature dependence, and strain hardening characteristics of fine-grained BCC metals are not well understood. The aim of this thesis is to understand the effect of strain-rate, temperature, strain and micros
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Bandyopadhyay, Hindol. "Effect Of Processing And Test Variables On The Deformation Characteristics Of Tantalum." Thesis, 2013. http://etd.iisc.ernet.in/handle/2005/2595.

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The dependence of flow stress of body centered cubic metals on variables such as strain rate, temperature, strain and microstructural is a research area of continued interest. Recently, there has been renewed interest in deformation of fine grained BCC metals, which display characteristics that are different from their coarse-grained counterparts. Deformation mechanisms, strain-rate and temperature dependence, and strain hardening characteristics of fine-grained BCC metals are not well understood. The aim of this thesis is to understand the effect of strain-rate, temperature, strain and micros
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47

Shyu, Jia-Chyuan, and 徐家權. "The effect of strain rate and temperature on the dynamic plastic deformation and dislocation substructure of 6061 Al alloy." Thesis, 1999. http://ndltd.ncl.edu.tw/handle/03332349974927776338.

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碩士<br>國立成功大學<br>機械工程學系<br>87<br>The purpose of this study is to investigate the deformation behavior of 6061 Al alloy under high temperature and high strain rate loading conditions. The mechanical testing is performed in the strain rates ranging from 1000s**-1 to 4000s**-1 and at constant temperature in the range of 25℃ to 300℃ by means of a split-Hopkinson bar which is developed based on one dimensional elastic wave propagation theory. The tested temperatures are obtained by enclosing the specimen in a clam shell radiant-heating furnace. The O.M. and T.E.M. techniques are also used to analyze
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Huang, Chi-sheng, and 黃啟生. "Effect of Strain Rate and Temperature on the Deformation and Failure Behaviour of Inconel 718 Super Alloy under Shear Loading." Thesis, 2009. http://ndltd.ncl.edu.tw/handle/86602348258306514922.

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碩士<br>國立成功大學<br>機械工程學系碩博士班<br>97<br>A split-Hopkinson torsional bar system is employed to conduct a comprehensive investigation into the dynamic shear deformation behaviour and fracture characteristics of Inconel 718 superalloy. The investigations commence by examining the mechanical response of the alloy under shear strain rates of 1×103 s-1, 1.5×103 s-1and 3.2×103 s-1, respectively, at temperatures of -150℃, 25℃ and 300℃. The experimental results indicate that the shear strain, shear strain rate and temperature all have a significant influence on the mechanical properties of Inconel 718
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Joshi, Mohit, and Pinaki Prasad Bhattacharjee. "Effect of Strain Path Change during Cold Rolling On the Evolution of Deformation and Recrystallization Textures of High Purity Nickel." Thesis, 2012. http://raiith.iith.ac.in/815/1/MS10M04.pdf.

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The effect of strain path change during cold rolling and subsequent annealing on the evolution of microstructure, texture and hardness properties of high purity nickel (~99.7%, average size ~ 36 μm) has been studied in the present work. Strain path change is achieved by employing two different rolling routes, namely, straight cold rolling (SCR) and cross cold rolling (CCR) in the present investigation. The rolling direction is kept constant throughout the deformation process in SCR route but during CCR processing the rolling direction (RD) and the transverse direction (TD) are mutually interch
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Srikanth, K. "A Dynamical Approach to Plastic Deformation of Nano-Scale Materials : Nano and Micro-Indentation." Thesis, 2016. https://etd.iisc.ac.in/handle/2005/2783.

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Recent studies demonstrate that mechanical deformation of small volume systems can be significantly different from those of the bulk. One such interesting length scale dependent property is the increase in the yield stress with decrease in diameter of micrometer rods, particularly when the diameter is below a micrometer. Intermittent flow may also result when the diameter of the rods is decreased below a certain value. The second such property is the intermittent plastic deformation during nano-indentation experiments. Here again, the instability manifests due to smallness of the sample size, i
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