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Dissertations / Theses on the topic 'Contact Mechanics'

Author: Grafiati

Published: 4 June 2021

Last updated: 25 July 2025

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1

Parel, Kurien Stephen. "An analysis of contact stiffness and frictional receding contacts." Thesis, University of Oxford, 2017. http://ora.ox.ac.uk/objects/uuid:3c29863a-b0cf-4870-851d-261be72f457f.

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The tangential contact stiffness for ground Ti-6Al-4V surfaces is measured to linearly decrease with the application of tangential load. At the beginning of the application of tangential load, for ground surfaces, the ratio of the tangential contact stiffness to the normal contact stiffness is seen to be approximately half the Mindlin ratio. This is consistent with many other published experimental studies. Measurements of normal contact stiffness for ground surfaces conform to a model that posits a linear relationship between normal contact stiffness and normal load. An equivalent surface rou

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2

Ma, Lifeng. "Contact mechanics for coated systems." Thesis, University of Oxford, 2004. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.409112.

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3

Lundvall, Olle. "Contact mechanics and noise in gears /." Linköping : Univ, 2004. http://www.bibl.liu.se/liupubl/disp/disp2004/tek862s.pdf.

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4

Pitteroff, Roland. "Contact mechanics of the bowed string." Thesis, University of Cambridge, 1995. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.387739.

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5

Siles, Brügge Oscar. "Contact mechanics at the molecular scale." Thesis, University of Sheffield, 2017. http://etheses.whiterose.ac.uk/18786/.

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A better understanding of the adhesive interactions between surfaces at the molecular scale is of growing importance as miniaturization efforts continue. To this end, Lifshitz theory of continuum mechanics was used to calculate the interaction energies between hydrocarbon surfaces in over 200 liquids, and compared to those obtained from the Hunter model of hydrogen bond solvation thermodynamics. In alkanes, amines, and primary alcohols, both theories yielded comparable results. However, in cases where the refractive index between interacting phases diverges greatly, a large disparity between t

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6

King, Christopher David S. M. Massachusetts Institute of Technology. "A coupled contact-mechanics computational model for studying deformable human-artifact contact." Thesis, Massachusetts Institute of Technology, 2018. http://hdl.handle.net/1721.1/118672.

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Thesis: S.M., Massachusetts Institute of Technology, Department of Mechanical Engineering, 2018.<br>This electronic version was submitted by the student author. The certified thesis is available in the Institute Archives and Special Collections.<br>Cataloged from student-submitted PDF version of thesis.<br>Includes bibliographical references (pages 199-205).<br>Gas-pressurized spacesuits are necessary for human spaceflight, most notably for extravehicular activity (EVA). Legacy EVA suits have been primarily rigid, and operation in such suits can result in significant metabolic expense, or eve

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7

Almqvist, Andreas. "Rough surface elastohydrodynamic lubrication and contact mechanics." Licentiate thesis, Luleå, 2004. http://epubl.luth.se/1402-1757/2004/035.

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8

Walls, Kenneth Cline. "Multi-material contact for computational structural mechanics." Birmingham, Ala. : University of Alabama at Birmingham, 2008. https://www.mhsl.uab.edu/dt/2008m/walls.pdf.

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9

Liu, Shubin Carleton University Dissertation Engineering Aerospace. "Boundary element analysis in contact fracture mechanics." Ottawa, 1994.

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10

Christensen, Peter W. "Computational nonsmooth mechanics : contact, friction and plasticity /." Linköping : Department of mechanical engineering, 2000. http://catalogue.bnf.fr/ark:/12148/cb40921031z.

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11

Bonari, Jacopo. "Novel interface discretisation methods for contact mechanics." Thesis, IMT Alti Studi Lucca, 2021. http://e-theses.imtlucca.it/326/1/Bonari_phdthesis.pdf.

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This thesis’ main scope is the presentation of two different methodologies for the analysis of contact problems involving morphologically complex or rough surfaces. Both approaches rely on the Finite Element Method (FEM) as the chosen computational framework. They hinge on the definition of an interface finite element used to model the space encompassed by two solids incontact. This kind of interface element is shared with the field of non-linear fracture mechanics, employed for the simulation of non-linear crack growth according to Cohesive Zone Model (CZM). Here, for the first time, th

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12

Everitt, Carl-Magnus. "Initiation of rolling contact fatigue from asperities in elastohydrodynamic lubricated contacts." Licentiate thesis, KTH, Hållfasthetslära (Avd.), 2018. http://urn.kb.se/resolve?urn=urn:nbn:se:kth:diva-222371.

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Rolling contacts are utilized in many technical applications, both in bearings and in the contact between gear teeth. These components are often highly loaded, which makes them susceptible to suffer from rolling contact fatigue. This work focuses on the rolling contact fatigue mechanism of pitting. In order to attain a better understanding of why pitting initiates and grows, detailed simulations of rolling contacts have been performed. In particular the contact between two gears in a truck retarder was here used as a case study. The investigated contact experienced elastohydrodynamic lubricati

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13

Peng, Wei. "Contact Mechanics of Multilayered Rough Surfaces in Tribology." The Ohio State University, 2001. http://rave.ohiolink.edu/etdc/view?acc_num=osu1002737061.

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14

Tvedt, Kristofer Eugene 1963. "Determination of contact stress using gap finite element method." Thesis, The University of Arizona, 1992. http://hdl.handle.net/10150/278152.

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The gap finite element uses the Richard equation to account for the nonlinearity in the boundary condition changes during deformation. This is accomplished by replacing the boundary nonlinearity with an equivalent material nonlinearity within the finite element program and using an incremental solution method. The gap element is developed as a special element with easily obtainable input parameters. The gap element is used to predict high stresses in local areas related to the contact of structural bodies. The major advantage to using a finite element solution with a gap element over a classic

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15

Neukirch, Sebastien. "Enroulement, contact et vibrations de tiges élastiques." Habilitation à diriger des recherches, Université Pierre et Marie Curie - Paris VI, 2009. http://tel.archives-ouvertes.fr/tel-00667562.

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Ce mémoire présente plusieurs études sur l'équilibre, la stabilité et les vibrations de poutres élastiques en grande rotation. Le modèle utilisé est d'abord présenté de deux manières différentes : les équations de Kirchhoff sont introduites (i) comme une théorie directe de Cosserat, (ii) par une approche asymptotique 3D->1D. Une étude relativement complète des équilibres avec et sans auto-contact d'une poutre sous contrainte de tension et torsion et encastrée en ses deux extrémités est ensuite exposée. Le modèle est d'autre part appliqué au sur-enroulement de la molécule d'ADN et aux expérienc

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16

Man, Kim Wai. "Boundary element analysis of contact in fracture mechanics." Thesis, University of Portsmouth, 1993. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.317864.

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17

Burke, Dave. "The mechanics of the contact phase in trampolining." Thesis, Loughborough University, 2015. https://dspace.lboro.ac.uk/2134/16744.

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During the takeoff for a trampoline skill the trampolinist should produce sufficient vertical velocity and angular momentum to permit the required skill to be completed in the aerial phase without excessive horizontal travel. The aim of this study was to investigate the optimum technique to produce forward somersault rotation. A seven-segment, subject-specific torque-driven computer simulation model of the takeoff in trampolining was developed in conjunction with a model of the reaction forces exerted on the trampolinist by the trampoline suspension system. The ankle, knee, hip, and shoulder j

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18

Reisse, Franziska. "Effect of malalignment on knee joint contact mechanics." Thesis, Anglia Ruskin University, 2014. http://arro.anglia.ac.uk/550363/.

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Osteoarthritis (OA) is a debilitating joint disease that leads to significant pain, loss of mobility and quality of life. Knee malalignment results in increased joint pressure, which is a primary cause for OA progression. High Tibial Osteotomy (HTO) is a surgical procedure to correct malalignment and redistribute load in the knee joint, reduce peak pressure and delay OA progression. However, clinical outcomes have been unpredictable. Therefore, the aim of this study was to determine the relationship between malalignment and knee contact mechanics. A 3D computational model was created from magn

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19

Reisse, Franziska. "Effect of malalignment on knee joint contact mechanics." Thesis, Anglia Ruskin University, 2014. https://arro.anglia.ac.uk/id/eprint/550363/1/FReisseThesis_final.pdf.

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Osteoarthritis (OA) is a debilitating joint disease that leads to significant pain, loss of mobility and quality of life. Knee malalignment results in increased joint pressure, which is a primary cause for OA progression. High Tibial Osteotomy (HTO) is a surgical procedure to correct malalignment and redistribute load in the knee joint, reduce peak pressure and delay OA progression. However, clinical outcomes have been unpredictable. Therefore, the aim of this study was to determine the relationship between malalignment and knee contact mechanics. A 3D computational model was created from mag

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20

Dalvi, Siddhesh Narayan. "UNDERSTANDING CONTACT MECHANICS AND FRICTION ON ROUGH SURFACES." University of Akron / OhioLINK, 2020. http://rave.ohiolink.edu/etdc/view?acc_num=akron158957808488289.

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21

Hua, Xijin. "Contact mechanics of metal on polyethylene hip replacements." Thesis, University of Leeds, 2013. http://etheses.whiterose.ac.uk/5568/.

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Metal-on-ultra high molecular weight polyethylene (UHMWPE) total hip replacement (THR) has been the most popular and clinically successful hip prosthesis to date. The long-term performance of THR depends on both the tribological characteristics and biomechanical behaviour of the prosthesis. This project focused on understanding the contact mechanics and mechanical behaviour of cemented and cementless metal-on-UHMWPE THRs under different conditions using a computational approach. Three-dimensional (3D) computational models of THRs with realistic pelvic bone were developed. Two typical bearings,

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22

Salehi, Shahin. "Machine Learning for Contact Mechanics from Surface Topography." Thesis, Luleå tekniska universitet, Institutionen för system- och rymdteknik, 2019. http://urn.kb.se/resolve?urn=urn:nbn:se:ltu:diva-76531.

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23

Kollepara, Kiran Sagar. "Low-rank and sparse approximations for contact mechanics." Thesis, Ecole centrale de Nantes, 2022. http://www.theses.fr/2022ECDN0030.

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Les stratégies typiques de modélisation réduite de la mécanique des contacts utilisent des approximations de rang inférieur. L’hypothèse sous-jacente est l’existence d’un sous-espace et d’un sous-cône de faible dimension pour les champs de déplacement et de pression de contact, respectivement. Cependant, la pression de contact présente un caractère local, car la zone de contact peut varier en fonction de paramètres tels que le chargement ou la géométrie. Dans cette thèse, la pertinence des approximations de rang faible pour la mécanique des contacts est étudiée et des voies alternatives fondée

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24

Wilson, W. Everett Jackson Robert L. "Surface separation and contact resistance considering sinusoidal elastic-plastic multiscale rough surface contact." Auburn, Ala, 2008. http://hdl.handle.net/10415/1490.

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25

Jelagin, Denis. "Frictional Effects on Hertzian Contact and Fracture." Doctoral thesis, KTH, Hållfasthetslära (Avd.), 2007. http://urn.kb.se/resolve?urn=urn:nbn:se:kth:diva-4535.

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This thesis addresses normal axisymmetric contact of dissimilar elastic solids at finite interfacial friction. It is shown that in the case of smooth and convex but otherwise arbitrary contact profiles and monotonically increasing loading a single stick-slip contour evolves being independent of loading and profile geometry. This allows developing an incremental procedure based on a reduced problem corresponding to frictional rigid flat punch indentation of an elastic half-space. The reduced problem, being independent of loading and contact region, was solved by a finite element method based on

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26

Rehermann, Pablo F. Sanz. "Modeling rock folding with large deformation frictional contact mechanics /." May be available electronically:, 2008. http://proquest.umi.com/login?COPT=REJTPTU1MTUmSU5UPTAmVkVSPTI=&clientId=12498.

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27

Ajibose, Olusegun K. "Nonlinear dynamics and contact fracture mechanics of high frequency percussive drilling." Thesis, Available from the University of Aberdeen Library and Historic Collections Digital Resources, 2009. http://digitool.abdn.ac.uk:80/webclient/DeliveryManager?application=DIGITOOL-3&owner=resourcediscovery&custom_att_2=simple_viewer&pid=61011.

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28

Shellock, Matthew R. "Contact analysis of nominally flat surfaces." Thesis, Monterey, Calif. : Naval Postgraduate School, 2008. http://handle.dtic.mil/100.2/ADA483610.

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Thesis (M.S. in Mechanical Engineering)--Naval Postgraduate School, June 2008.<br>Thesis Advisor(s): Kwon, Young W. "June 2008." Description based on title screen as viewed on September 2, 2008. Includes bibliographical references (p. 51). Also available in print.

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29

Votsios, Vasilis. "Contact mechanics and impact dynamics of non-conforming elastic and viscoelastic semi-infinite or thin bonded layered solids." Thesis, Loughborough University, 2003. https://dspace.lboro.ac.uk/2134/11815.

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The thesis is concerned with the contact mechanics behaviour of non-conforming solids. The geometry of the solids considered gives rise to various contact configurations, from concentrated contacts with circular and elliptical configuration to those of finite line nature, as well as those of less concentrated form such as circular flat punches. The radii of curvature of mating bodies in contact or impact give rise to these various nonconforming contact configurations and affect their contact characteristics, from those considered as semi-infinite solids in accord with the classical Hertzian th

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30

Heuer, Dennis, Norbert Schwarzer, and Thomas Chudoba. "Contact Mechanics in Dentistry: A systematic investigation of modern composite materials used for fillings." Universitätsbibliothek Chemnitz, 2006. http://nbn-resolving.de/urn:nbn:de:swb:ch1-200600133.

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Nowadays, high demands are made on filling materials in modern dentistry: Durability, Reliability &Aesthetic Requirements Thus, a group of physicists and an independent practicing dentist investigated 11 different teeth fillings (composite materials) as used in modern dental practices according to their stability and ability to withstand contact loadings.

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31

Wei, Deheng. "Granular Mechanics Across Length Scales: Contact, Breakage, Fracture, and Permeability." Thesis, University of Sydney, 2021. https://hdl.handle.net/2123/24546.

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Particle morphology is of pivotal importance in granular materials at different length scales. This thesis begins with quantification and reconstruction of real particle shapes, then studies various kinds of granular material behaviour influenced by morphology features. The project background and related previous work are introduced in Chapters 1 and 2, respectively. Chapter 3 is firstly concentrated on reconstructing particle shapes using Spherical Harmonics (SH). DEM clumps are also used to approximate realistic particle shapes to simulate sand column collapse. The efficiency of SH analysis

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32

Hodaei, Mohammad. "Multi Scale Contact Mechanics of Bio-Mechanical Systems with inclusion of roughness effect- Fractal Analysis." OpenSIUC, 2015. https://opensiuc.lib.siu.edu/dissertations/1064.

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Contact mechanics of rough surfaces and surface wear will be considered. Two types of failures are considered. The first involving rapidly growing failure and the second fatigue type surface failure as a result of repetitive application of load cycle. The first type of failure will be identified based on surface hysteresis energy loss in a load/unload cycle or examination of fracture toughness of the material near its rough surface. The above approach will be used to examine both types of failure in joint implants in the human body. These include consideration of implants for hip, ankle, sp

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33

Buchan, Lawrence Lewis. "Open MRI investigation of contact mechanics in cam femoroacetabular impingement." Thesis, University of British Columbia, 2015. http://hdl.handle.net/2429/52576.

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Cam femoroacetabular impingement (FAI) is a mechanical process thought to cause of hip osteoarthritis (OA). In cam FAI, it is thought that a ‘cam deformity’ on the femoral head-neck junction intrudes into the intra-articular joint space, inducing elevated mechanical force on acetabular cartilage. However, few experimental studies have measured contact mechanics in FAI. Open MRI in functional positions has potential to directly and non-invasively assess cam FAI, but MRI measures have not been related to mechanics. This thesis asked, in cadaver hips positioned in a simulated anterior impingement

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34

Zdero, Radovan. "A new diagnostic ultrasound technique for studying TKR contact mechanics." Thesis, National Library of Canada = Bibliothèque nationale du Canada, 1999. http://www.collectionscanada.ca/obj/s4/f2/dsk1/tape8/PQDD_0001/NQ42992.pdf.

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35

Jackson, Monique I. "The mechanics of the table contact phase of gymnastics vaulting." Thesis, Loughborough University, 2010. https://dspace.lboro.ac.uk/2134/6330.

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A computer simulation model of the table contact phase of gymnastics vaulting was developed to gain an understanding of the mechanics of this phase of the vault. The model incorporated a gymnast and a vaulting table, and used a novel two-state contact phase representation to simulate the interaction between these two bodies during the table contact phase. The gymnast was modelled in planar form using seven segments, with torque generators acting at the wrist, shoulder, hip and knee joints. The model also allowed for shoulder retraction and protraction, displacement of the glenohumeral joint ce

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36

Acito, Vito. "In situ X-ray computed tomography for soft contact mechanics." Electronic Thesis or Diss., Ecully, Ecole centrale de Lyon, 2023. http://www.theses.fr/2023ECDL0054.

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L'aire de contact réelle AR entre deux solides en contact est une quantité fondamentale qui contrôle le comportement de frottement d'une interface de contact. Bien que la plupart des techniques expérimentales visant à mesurer cette quantité soient basées sur le contraste optique entre les régions en contact et hors contact, ces méthodes sont limitées par la transparence optique requise par au moins l'un des deux corps en contact. En outre, ces techniques ne permettent d'accéder qu'à l'interface de contact sans fournir d'informations sur d'autres quantités physiques importantes telles que la dé

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37

Shariati, Hossein. "Mechanical modeling of granite subjected to contact loading." Licentiate thesis, KTH, Hållfasthetslära (Avd.), 2019. http://urn.kb.se/resolve?urn=urn:nbn:se:kth:diva-263592.

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The mechanical properties of Bohus granite subjected to contact loading is investigated based on experimental and numerical results. An elasto-plastic constitutive material model combined with a damage description is employed. The material model parameters are determined based on experimental results. Any kind of inelastic deformation except the tensile failure is described by a linear Drucker-Prager (DP) plasticity model with variable dilation angle. As for the damage description, an anisotropic damage model (DFH model) is considered to account for the tensile failure (i.e. mode I fracture).

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38

Kruntcheva, Mariana. "Dynamics of circular cylindrical shells in contact with fluid." Thesis, Robert Gordon University, 1998. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.245161.

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39

Krithivasan, Vijaykumar Jackson Robert Lloyd. "Finite element analysis of three-dimensional elasto-plastic sinusoidal contact and inclusion in a multi-scale rough surface contact model." Auburn, Ala., 2008. http://repo.lib.auburn.edu/EtdRoot/2008/SPRING/Mechanical_Engineering/Thesis/Krithivasan_Vijaykumar_55.pdf.

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40

Liu, Ming. "FINITE ELEMENT ANALYSIS OF THE CONTACT DEFORMATION OF PIEZOELECTRIC MATERIALS." UKnowledge, 2012. http://uknowledge.uky.edu/cme_etds/15.

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Piezoelectric materials in the forms of both bulk and thin-film have been widely used as actuators and sensors due to their electromechanical coupling. The characterization of piezoelectric materials plays an important role in determining device performance and reliability. Instrumented indentation is a promising method for probing mechanical as well as electrical properties of piezoelectric materials. The use of instrumented indentation to characterize the properties of piezoelectric materials requires analytical relations. Finite element methods are used to analyze the indentation of piezoel

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41

McKeon, James Christopher P. "Tomography applied to Lamb wave contact scanning nondestructive evaluation." W&M ScholarWorks, 1998. https://scholarworks.wm.edu/etd/1539623370.

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The aging world-wide aviation fleet requires methods for accurately predicting the presence of structural flaws that compromise airworthiness in aircraft structures. Nondestructive Evaluation (NDE) provides the means to assess these structures quickly, quantitatively, and noninvasively. Ultrasonic guided waves, Lamb waves, are useful for evaluating the plate and shell structures common in aerospace applications. The amplitude and time-of-flight of Lamb waves depend on the material properties and thickness of a medium, and so they can be used to detect any areas of differing thickness or materi

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42

ELKILANI, YASSER SHAWKI. "A HYBRID ELASTICITY AND FINITE ELEMENT METHOD FOR THREE-DIMENSIONAL CONTACT PROBLEMS WITH FRICTION." University of Cincinnati / OhioLINK, 2003. http://rave.ohiolink.edu/etdc/view?acc_num=ucin1055167472.

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43

Gomez, Miguel J. "Optimization-based analysis of rigid mechanical systems with unilateral contact and kinetic friction /." Thesis, Connect to this title online; UW restricted, 2008. http://hdl.handle.net/1773/6793.

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44

Patil, Amit. "Inflation Mechanics of Hyperelastic Membranes." Licentiate thesis, KTH, Strukturmekanik, 2015. http://urn.kb.se/resolve?urn=urn:nbn:se:kth:diva-160707.

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The applications of inflatable membrane structures are increasing rapidly in the various fields of engineering and science. The geometric, material, force and contact non-linearities complicate this subject further, which in turn increases the demand for computationally efficient methods and interpretations of counter-intuitive behaviors noted by the scientific community. To understand the complex behavior of membranes in biological and medical engineering contexts, it is necessary to understand the mechanical behavior of a membrane from a physics point of view. The first part of the presen

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45

Gokay, Kemal. "Contact Mechanics Of Graded Materials With Two Dimensional Material Property Variations." Master's thesis, METU, 2005. http://etd.lib.metu.edu.tr/upload/12606527/index.pdf.

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ABSTRACT CONTACT MECHANICS OF GRADED MATERIALS WITH TWODIMENSIONAL MATERIAL PROPERTY VARIATIONS G&ouml<br>kay, Kemal M.S., Department of Mechanical Engineering Supervisor: Asst. Prof. Dr. Serkan Dag September 2005, 62 pages Ceramic layers used as protective coatings in tribological applications are known to be prone to cracking and debonding due to their brittle nature. Recent experiments with functionally graded ceramics however show that these material systems are particularly useful in enhancing the resistance of a surface to tribological damage. This improved behavior is attributed to the

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46

Andres, Michael [Verfasser]. "Dual-dual formulations for frictional contact problems in mechanics / Michael Andres." Hannover : Technische Informationsbibliothek und Universitätsbibliothek Hannover (TIB), 2011. http://d-nb.info/1014363608/34.

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47

Hallberg, Hofstrand Erik. "Flexographic post-printing of corrugated board : contact mechanics and print quality /." Karlstad : Department of Chemical Engineering, Karlstads universitet, 2006. http://www.diva-portal.org/kau/theses/abstract.xsql?dbid=537.

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48

Zhou, Yunong [Verfasser]. "Modelling contact mechanics with improved Green's function molecular dynamics / Yunong Zhou." Saarbrücken : Saarländische Universitäts- und Landesbibliothek, 2020. http://d-nb.info/1228858713/34.

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49

FEINAUER, CHRISTOPH. "The Statistical Mechanics Approach to Protein Sequence Data: Beyond Contact Prediction." Doctoral thesis, Politecnico di Torino, 2016. http://hdl.handle.net/11583/2640930.

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The recent application of models from inverse statistical mechanics to protein sequence data in has been a large success. In my thesis, I will build upon these models but also use them beyond their original aim of residue contact prediction. This includes the improvement of contact prediction itself by extending the models, the application of the methods in the wider scope of protein interaction networks and the prediction of further biological characteristics from the extracted information.

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50

Kudawoo, Ayaovi Dzifa. "Problèmes industriels de grande dimension en mécanique numérique du contact : performance, ﬁabilité et robustesse". Phd thesis, Université de Provence - Aix-Marseille I, 2012. http://tel.archives-ouvertes.fr/tel-00773642.

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Ce travail de thèse concerne la mécanique numérique du contact entre solides déformables. Il s'agit de contribuer à l'amélioration de la performance, de la ﬁabilité et de la robustesse des algorithmes et des modèles numériques utilisés dans les codes éléments ﬁnis en particulier Code_Aster qui est un code libre développé par Électricité De France (EDF) pour ses besoins en ingénierie. L'objectif ﬁnal est de traiter les problèmes industriels de grande dimension avec un temps de calcul optimisé. Pour parvenir à ces objectifs, les algorithmes et formulations doivent prendre en compte les difﬁculté

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