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Dissertationen zum Thema „Diagram of fracture strain“

Autor: Grafiati

Veröffentlicht am 28. Juni 2021

Zuletzt aktualisiert am 29. Juli 2025

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1

Dubravec, Kristián. "Elastoplastická analýza napětí a deformace a stanovení lomových parametrů při tahovém namáhání těles s koncentrátory napětí." Master's thesis, Vysoké učení technické v Brně. Fakulta strojního inženýrství, 2021. http://www.nusl.cz/ntk/nusl-443729.

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The aim of this thesis is the construction of a diagram of fracture strain for high strength steel OCHN3MFA and its application for the estimation of fracture toughness of this material. The first part of the thesis contains the necessary theoretical framework for numerical modelling of tensile tests of various specimens - smooth specimen, specimen with a notch and specimen with a circumferential crack, it describes the influence of triaxiality on the fracture of bodies and the possibilities of construction of the diagram of fracture strain. Subsequently, a numerical model of these specimens i

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2

Zhou, Qing 1964. "Analysis of plane strain necking and fracture in strain hardening materials." Thesis, Massachusetts Institute of Technology, 1994. http://hdl.handle.net/1721.1/11636.

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3

Mahmood, K. "Influence of strain rate on oxide fracture." Thesis, Cranfield University, 1988. http://dspace.lib.cranfield.ac.uk/handle/1826/11358.

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The ability of metals and alloys to form and retain protective oxide scales is crucial to their stability at elevated temperatures for extended times. Hence the identification of factors that promote or limit the integrity of oxides on high temperature materials has been the subject of intensive investigations. In the present study the mechanical properties of this chromiwm.-rkh scale on 304 stainless steel foil has been investigated in relation to the deformation rates in the substrate. It was shown that heavy cold working (up to 90%) delays the onset of breakaway oxidation and results in a v

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4

Alinaghian, Yaser. "The Effect of Pre-strain and Strain Path Changes on Ductile Fracture." Thèse, Université d'Ottawa / University of Ottawa, 2013. http://hdl.handle.net/10393/23917.

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Industrial metal forming operations generally require several deformation steps in order to create the final product. The mechanical behavior of materials undergoing strain path changes can be very different from those deformed in a given direction to fracture. The work presented here employed laser drilled model materials to better understand the effect of pre-strains and strain path changes on void growth and linkage leading to fracture is studied. The experimental results show that increasing pre-strain results in faster void growth which was justified in terms work hardening rate in the s

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5

Moore, Andrew J. "Strain analysis using ESPI applied to fracture mechanics." Thesis, Loughborough University, 1993. https://dspace.lboro.ac.uk/2134/11889.

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Electronic speckle pattern interferometry (ESPI) has become an established technique for surface deformation studies. However, difficulties remain in the practical use of ESPI, primarily because results require skilled and time-consuming interpretation. The work reported here has enabled automated acquisition and processing of ESPI displacement data. Further processing has enabled the components of surface strain and stress to be, determined automatically. Such measurements are of great importance for experimental fracture mechanics studies, a quantitative approach to measuring the severity of

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6

Millereau, Pierre Michel. "Large Strain and Fracture of Multiple Network Elastomers." Thesis, Paris 6, 2017. http://www.theses.fr/2017PA066082/document.

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Durant ce travail, nous avons étudié les propriétés mécaniques et de fracture d'élastomères à réseaux multiples synthétisés par des étapes successives de gonflement/polymérisation inspirées de l'architecture moléculaire développée par Gong pour les doubles réseaux hydrogels. Une méthode de synthèse plus versatile a été utilisée pour varier de façon continue le pré-étirement isotrope du premier réseau λ0, qui contrôle le module d'Young et le durcissement. Dans le cas d'une dilution importante du premier réseau (<10%), une scission moléculaire apparaît à grande déformation dans le réseau pré-

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7

Millereau, Pierre Michel. "Large Strain and Fracture of Multiple Network Elastomers." Electronic Thesis or Diss., Paris 6, 2017. https://accesdistant.sorbonne-universite.fr/login?url=https://theses-intra.sorbonne-universite.fr/2017PA066082.pdf.

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Durant ce travail, nous avons étudié les propriétés mécaniques et de fracture d'élastomères à réseaux multiples synthétisés par des étapes successives de gonflement/polymérisation inspirées de l'architecture moléculaire développée par Gong pour les doubles réseaux hydrogels. Une méthode de synthèse plus versatile a été utilisée pour varier de façon continue le pré-étirement isotrope du premier réseau λ0, qui contrôle le module d'Young et le durcissement. Dans le cas d'une dilution importante du premier réseau (<10%), une scission moléculaire apparaît à grande déformation dans le réseau pré-

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8

Fung, Kam-sang. "Fatigue crack propagation with strain energy density approach /." [Hong Kong] : University of Hong Kong, 1989. http://sunzi.lib.hku.hk/hkuto/record.jsp?B12827204.

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9

Martinsen, Vegard. "Micromechanical Modelling of Strain Localization and Fracture in Aluminium." Thesis, Norges teknisk-naturvitenskapelige universitet, Institutt for konstruksjonsteknikk, 2012. http://urn.kb.se/resolve?urn=urn:nbn:no:ntnu:diva-18812.

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Aluminium is often treated as a homogeneous material. However, when investigated on a microscopic scale, a granular structure is observed. The mechanical properties of the constituents, together with the distribution of stresses and strains, determines the fracture toughness of the material.The objective of this master thesis was to investigate strain localization and fracture in aluminium on a microscopic scale. Relevant literature regarding fracture mechanisms was studied in order to determine which parameters influence the fracture toughness of aluminium. The distribution of effective plast

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10

Dabboussi, Wael. "High strain rate deformation and fracture of engineering materials." Thesis, McGill University, 2003. http://digitool.Library.McGill.CA:80/R/?func=dbin-jump-full&object_id=79224.

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Containment structures for aircraft engines must withstand impacts of failed engine components, which may be traveling at extremely high velocities. Therefore, the design of such structures requires a thorough knowledge of material behaviour at high rates of deformation. It is well known that at strain rates above 102 s-1, the yield stress of metals may be significantly different than at quasi-static rates. In addition, material fracture under dynamic loading can also differ from that at slower rates due to manifestation of different failure mechanisms. The purpose of this study was to

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11

Vijayakumar, Vinod. "Stress/strain environments in healing human tibial fractures." Thesis, University of Oxford, 2003. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.275202.

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12

Wong, Siu-wah. "Predicition of fatigue crack propagation using strain energy density method /." [Hong Kong : University of Hong Kong], 1989. http://sunzi.lib.hku.hk/hkuto/record.jsp?B12751601.

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13

馮錦生 and Kam-sang Fung. "Fatigue crack propagation with strain energy density approach." Thesis, The University of Hong Kong (Pokfulam, Hong Kong), 1989. http://hub.hku.hk/bib/B31209713.

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14

黃小華 and Siu-wah Wong. "Predicition of fatigue crack propagation using strain energy density method." Thesis, The University of Hong Kong (Pokfulam, Hong Kong), 1989. http://hub.hku.hk/bib/B31209506.

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15

Oess, Ninja P. "Strain measurements using magnetoelastic sensing for wireless bone fracture healing assessment /." Zürich : ETH, 2007. http://e-collection.ethbib.ethz.ch/show?type=diss&nr=17550.

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16

Oduleye, Olusoji Olaleye. "The transport properties of BSCCO superconducting tapes under cyclic stress/strain conditions." Thesis, London South Bank University, 1999. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.267388.

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17

Paul, Graeme William Alexander. "Strain aging of high carbon steel wire." Thesis, University of Strathclyde, 1998. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.366744.

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18

MacKenzie, P. M. "Developments in Moire interferometry and its application in experimental fracture mechanics." Thesis, University of Strathclyde, 1987. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.382405.

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19

Oatway, Wayne Brian. "Time resolved study of the deformation of polyethylene at high strain rates using X-ray diffraction and stress-strain techniques." Thesis, Keele University, 1998. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.263196.

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20

Noble, Jonathan Paul. "Constitutive relations for materials at high strain rates." Thesis, University of Oxford, 1993. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.336162.

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21

Porr, William C. "Specimen size effects in slow strain-rate testing." Thesis, Virginia Polytechnic Institute and State University, 1987. http://hdl.handle.net/10919/53153.

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A study was conducted to evaluate the effect of specimen dimensions in slow strain-rate environmental effects testing. Tension tests of free machining brass were conducted in a mercuric nitrate solution at a constant crosshead displacement rate of 10⁻³(inch/sec). Thirty-six smooth round bar specimens with different dimensions were tested. It was shown that percent elongation to failure was inversely proportional to an effective ratio of length to diameter, ((D - 2a)L / D²), where D is the specimen diameter, L is the length of the reduced cross section of the specimen, and a is the environmenta

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22

Lin, Shiann. "Crack analysis by distributed strain nuclei with application to indentation testing." Thesis, University of Oxford, 1997. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.339286.

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23

Guo, Jiulin. "Geometric and spatial heterogeneity in natural fracture systems formed during 3D strain." Thesis, Durham University, 2009. http://etheses.dur.ac.uk/2172/.

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The geometric and spatial heterogeneity in fracture systems of natural fault zones reflect complex strain patterns and exert substantial influences on host rock properties. It has been recognized that general 3D strains will produce diffuse fracture orientation patterns and characteristic kinematics, which are proposed to vary towards the fault core. The bootstrapping methods and spatial correlation analysis [(semi-) variograms] were adopted to investigate the geometric and spatial hetero-geneity in fracture orientations collected systematically with reference to their spatial locations from t

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24

Mak, Yew-Poh. "Strain rate effects on tensile fracture and damage tolerance of composite laminates." Thesis, Massachusetts Institute of Technology, 1992. http://hdl.handle.net/1721.1/43256.

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Thesis (M.S.)--Massachusetts Institute of Technology, Dept. of Aeronautics and Astronautics, 1992.<br>Title as it appears in the June, 1992 MIT Graduate List: Strain rate effects on tensile failure and damage tolerance of composite laminates.<br>Includes bibliographical references (leaves 133-138).<br>by Yew-Poh Mak.<br>M.S.

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25

Beaumont, Richard Adrian. "Determining the effect of strain rate on the fracture of sheet steel." Thesis, University of Warwick, 2012. http://wrap.warwick.ac.uk/56768/.

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A key challenge for the automotive industry is to reduce vehicle mass without compromising on crash safety. To achieve this, it is necessary to model local failure in a material rather than design to the overly conservative criteria of total elongation to failure. The current understanding of local fracture is limited to quasi-static loading or strain rates an order of magnitude too high for automotive crash applications. This thesis studies the local fracture properties of DP800 sheet steel at the macroscopic scale from strain rates of to for the first time. Geometries for three stress states

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26

Al-Quraishi, Ali Abdul Hussain. "The Deformation and Fracture Energy of Natural Rubber Under High Strain Rates." University of Akron / OhioLINK, 2007. http://rave.ohiolink.edu/etdc/view?acc_num=akron1185471043.

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27

Alshahrani, Faris. "A Load-to-Fracture and Strain Analysis of Monolithic Zirconia Cantilevered Frameworks." The Ohio State University, 2016. http://rave.ohiolink.edu/etdc/view?acc_num=osu1468956378.

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28

Almaari, Firas, and Essam Aljbban. "Strain Rate Effect on Fracture Mechanical Properties of Ferritic-Pearlitic Ductile Iron." Thesis, Linnéuniversitetet, Institutionen för byggteknik (BY), 2018. http://urn.kb.se/resolve?urn=urn:nbn:se:lnu:diva-78858.

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This study investigates the effect of strain rate on fracture properties of Ferritic-Pearlitic Ductile Iron. A series of dynamic three point bending tests, with various load application rates, are conducted on Charpy V-notch specimens, in room temperature and approximately -18 °C. The tests are performed in a custom-made fixture and during the tests, force and displacement data are recorded. A XFEM (Extended Finite Element Method) model of the test setup has been established and material data from the tests are used as input to the model. The test results show a strong dependency of the strain

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29

Wright, Stuart Charles. "High strain rate response and ballistic impact of polycarbonate." Thesis, University of Cambridge, 1991. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.335252.

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30

Pandya, Kedar Chaitanya. "The study of long term fracture properties in tough polyethylene." Thesis, Imperial College London, 2000. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.344082.

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31

畔上, 秀幸, Hideyuki Azegami, 五憲權, OHeon Kwon, 勝彦渡辺 та Katsuhiko Watanabe. "き裂エネルギー密度による安定成長き裂の破壊抵抗評価 (第6報, 平面ひずみ形破壊への適用)". 日本機械学会, 1989. http://hdl.handle.net/2237/7261.

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32

Majzoobi, G. H. "Experimental and numerical studies of metal deformation and fracture at high strain rates." Thesis, University of Leeds, 1990. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.417927.

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33

Cosham, Andrew. "The effect of pre-strain on the fracture toughness of line pipe steel." Thesis, University of Cambridge, 2005. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.614660.

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34

Balasundaram, Arunkumar. "Effect of stress state and strain on particle cracking damage evolution in 5086 wrought al-alloy." Thesis, Georgia Institute of Technology, 2001. http://hdl.handle.net/1853/14809.

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35

Nava, JoseÌ Manuel Franco. "Finite element versus boundary element analysis of finite strain elastic and elastoplastic fracture mechanics." Thesis, Cranfield University, 2004. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.401612.

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36

Scherer, Jean-Michel. "Strain localization and ductile fracture in single crystals : application to irradiated austenitic stainless steels." Thesis, Université Paris sciences et lettres, 2020. http://www.theses.fr/2020UPSLM026.

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Pour leurs excellentes propriétés mécaniques et d’oxydation, les aciers austénitiques inoxydables sont largement utilisés dans l’industrie nucléaire, en particulier pour les structures internes de coeur des réacteurs. Toutefois, les niveaux d’irradiation neutronique importants auxquels ces matériaux sont exposés peuvent nuire à leurs propriétés mécaniques. Une forte baisse de la ténacité est en effet observée à mesure que la dose d’irradiation augmente. Selon les conditions d’irradiation (température, dose), on distingue principalement deux types de défauts induits par l’irradiation pouvant êt

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37

Manoharan, Mohan. "Combined mode I - mode III plane strain fracture toughness of two high carbon steels /." The Ohio State University, 1988. http://rave.ohiolink.edu/etdc/view?acc_num=osu1487594970651702.

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38

PUCCIA, Marianna. "Strain localization and fracture in isotropic damaging materials: a novel augmented-finite element strategy." Doctoral thesis, Università degli Studi di Palermo, 2022. https://hdl.handle.net/10447/575588.

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39

Sutherland, Brandy. "Experimental and analytical analysis of the stress-strain diagram of FRP-confined concrete with different loading rates." Thesis, Manhattan, Kan. : Kansas State University, 2007. http://hdl.handle.net/2097/420.

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40

Johnson, David Thomas. "Deformation mechanisms in ABS polymers." Thesis, Cranfield University, 2000. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.341042.

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41

Pryce, A. W. "Matrix cracking and stress/strain behaviour of continuous fibre ceramic composite laminates." Thesis, University of Surrey, 1991. http://epubs.surrey.ac.uk/843150/.

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Matrix damage and its effects on mechanical properties have been examined for SiC (Nicalon1) fibre reinforced glass and glass ceramic matrix composites under quasi-static and fatigue loading conditions. Nicalon/Pyrex laminates of different lay-ups have been tested under quasi-static tension. The elastic moduli have been measured and matrix damage monitored as a function of applied strain. The mechanical properties are strongly influenced by the presence of crystalline regions in the matrix which promote microcracking. Laminated plate theory is used to provide bounds to the moduli of the lamina

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42

Falk, Johannes. "Fracture prediction of stretched shear cut edges in sheets made of Dual-Phase steel." Thesis, Blekinge Tekniska Högskola, Institutionen för maskinteknik, 2017. http://urn.kb.se/resolve?urn=urn:nbn:se:bth-13956.

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Dual-Phase (DP) steels, part of the group of Advanced High Strength Steels (AHSS), are used by car manufactures due to its large strength to weight ratio. The high strength of the DP steel does have a negative impact on the formability during sheet metal forming and stretch forming, e.g. fractures often appear in shear cut edges during forming of blanks made of DP steel. The main objective with this thesis is to develop a new punch for Volvo Cars that concentrates the strain to the sheared edges of a test specimen made from different types of DP steel. This is done to be able to measure and

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43

Lai, Yeh-Hung. "The constrained blister - a nearly constant strain energy release rate test for adhesives." Thesis, Virginia Tech, 1988. http://hdl.handle.net/10919/44077.

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<p>This study developed and analyzed a modification of the blister test permitting nearly constant strain energy release rate testing of adhesive bonds. The work consisted of three parts; (1) development of the testing technique to evaluate strain energy release rate and to record the time dependent nature of the fracture process, (2) numerical analysis of the constrained blister test to determine the applicability of an approximate solution for several materials, and (3) development of an. analytical technique to evaluate the strain energy release rate for relatively stiff specimens.<

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44

Nissley, Nathan Eugene. "Development of the Strain-To-Fracture Test to Study Ductility-Dip Cracking in Austenitic Alloys." The Ohio State University, 2002. http://rave.ohiolink.edu/etdc/view?acc_num=osu1364214451.

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45

Alsaery, Amani Saleh. "Strain and load-to-fracture comparison of CAD-CAM dental implant crown materials under loading." The Ohio State University, 2017. http://rave.ohiolink.edu/etdc/view?acc_num=osu1483730173077362.

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46

Horn, Anthony John. "Development of an engineering assessment procedure for predicting cleavage fracture from non-sharp defects using the failure assessment diagram." Thesis, University of Manchester, 2010. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.515092.

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Current defect assessment procedures assume all flaws to be sharp, a conservative assumption that can lead to pessimistic structural integrity assessment of structures and under-estimation of their safety margin against fracture. This study has developed an engineering assessment procedure for predicting cleavage fracture resistance of structures containing non-sharp defects. The new procedure can be incorporated into existing defect assessment methods via a modification of the Failure Assessment Diagram (FAD). The new procedure was developed and validated using a combination of testing and fi

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47

McElderry, Susie. "Contrasting deformation styles in the Domeyko Fault System, northern Chile." Thesis, University of Liverpool, 1998. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.366424.

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Subduction of an oceanic plate under the Pacific margin of South America has heen prevalent since Jurassic times. Magmatic and deformation centres have migrated eastward since suhduction began. Northern Chile houses two north-south trench linked strike-slip fault systems, the Atacama Fault Zone and the Domeyko Fault System (DFS). The DFS lies within the Chilean Precordillera from 2 10 to 28°S. Lateral movement began on the DFS in the Eocene. The DFS can be divided into three segments which have apparently undergone differing deformation histories. This study has focused on the central segment

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48

Nagl, Michael Martin. "Identification of the mechanism of oxide scale fracture, and its correlation with strain using acoustic emission." Thesis, University of South Wales, 1992. https://pure.southwales.ac.uk/en/studentthesis/identification-of-the-mechanism-of-oxide-scale-fracture-and-its-correlation-with-strain-using-acoustic-emission(60f7dec2-bf42-4f44-86f7-b216a1adc662).html.

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Thermally formed oxides scales can protect metals from aggressive environments at high temperatures. However the barrier function is destroyed when the oxide fails. Therefore a new 4-point bend test technique has been developed to measure the failure strains and to study the failure mechanisms of brittle layers in tension and compression. Tests were made with iron oxide and nickel oxide at room temperature and 550 or 900 °C, respectively, using strain rates of 10~* and 10"5 s"1 . Brittle lacquer was used as a model layer. Acoustic emission (AE) was employed to monitor and interpret failure mec

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49

Prakash, Naveen. "Coupled Electromechanical Peridynamics Modeling of Strain and Damage Sensing in Carbon Nanotube Reinforced Polymer Nanocomposites." Diss., Virginia Tech, 2017. http://hdl.handle.net/10919/78803.

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This work explores the computational modeling of electromechanical problems using peridynamics and in particular, its application in studying the potential of carbon nanotube (CNT) reinforced nanocomposites for the purpose of sensing deformation and damage in materials. Peridynamics, a non-local continuum theory which was originally formulated for modeling problems in solid mechanics, has been extended in this research to electromechanical fields and applied to study the electromechanical properties of CNT nanocomposites at multiple length scales. Piezoresistivity is the coupling between the

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50

Agarwal, Himanshu. "Effect of loading condition, stress state and strain on three-dimensional damage evolution in 6061 wrought Al-alloy." Thesis, Georgia Institute of Technology, 2001. http://hdl.handle.net/1853/14798.

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