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Tesi sul tema "Nanoindentation"

Autore: Grafiati
Pubblicato: 4 giugno 2021
Ultima modifica: 25 luglio 2025

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1

Ziegenhain, Dr Gerolf. "Atomistische Simulation von Nanoindentation." Kaiserslautern Dr. Gerolf Ziegenhain c/o TU Kaiserslautern, 2009. http://gerolf.ziegenhain.com.

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2

Tang, Bin. "Nanoindentation of viscoelastic materials." Click to view the E-thesis via HKUTO, 2005. http://sunzi.lib.hku.hk/hkuto/record/B3655408X.

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3

Wheeler, Jeffrey M. "Nanoindentation under dynamic conditions." Thesis, University of Cambridge, 2009. https://www.repository.cam.ac.uk/handle/1810/218320.

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Abstract (sommario):
Nanoindentation has emerged as a leading technique for the investigation of mechanical properties on small volumes of material. Extensive progress has been made in the last 20 years in refining the nstrumentation of nanoindentation systems and in analysis of the resulting data. Recent development has enabled investigation of materials under several dynamic conditions. The palladium-hydrogen system has a large miscibility gap, where the palladium lattice rapidly expands to form a hydrogen-rich β phase upon hydrogenation. Nanoindentation was used to investigate the mechanical effects of these tr
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4

Feng, Gang, and 封剛. "Creep effects in nanoindentation." Thesis, The University of Hong Kong (Pokfulam, Hong Kong), 2001. http://hub.hku.hk/bib/B31224350.

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Tang, Bin, and 唐斌. "Nanoindentation of viscoelastic materials." Thesis, The University of Hong Kong (Pokfulam, Hong Kong), 2005. http://hub.hku.hk/bib/B3655408X.

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6

Pfetzing, Janine. "Nanoindentation von NiTi-Formgedächtnislegierungen." Aachen Shaker, 2009. http://d-nb.info/995887918/04.

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7

Feng, Gang. "Creep effects in nanoindentation." Hong Kong : University of Hong Kong, 2001. http://sunzi.lib.hku.hk/hkuto/record.jsp?B23273288.

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8

McGee, Edward. "Multiscale modelling of nanoindentation." Thesis, Loughborough University, 2006. https://dspace.lboro.ac.uk/2134/35387.

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The process of nanoindentation causes physical phenomena not only at the nano-scale, but at multiple length scales up to the macroscopic. This thesis investigates multiscale modelling of nanoindentation that links atomistic scale molecular dynamics (MD) to a finite element (FE) model in order to extend the length scales that can be modelled. Existing multiscale models are investigated and the relevant advantages and disadvantages of each are discussed. New coupling techniques are developed in both 2D and 3D, which are applied to nanoindentation test simulations to verify the models. A new forc
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9

Christopher, David. "Molecular dynamics modelling of nanoindentation." Thesis, Loughborough University, 2002. https://dspace.lboro.ac.uk/2134/6924.

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This thesis presents an atomic-scale study of nanoindentation, with carbon materials and both bcc and fcc metals as test specimens. Classical molecular dynamics (MD) simulations using Newtonian mechanics and many-body potentials, are employed to investigate the elastic-plastic deformation behaviour of the work materials during nanometresized indentations. In a preliminary model, the indenter is represented solely by a non-deformable interface with pyramidal and axisymmetric geometries. An atomistic description of a blunted 90° pyramidal indenter is also used to study deformation of the tip, ad
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10

McCann, Martha Mary. "Nanoindentation of Gold Single Crystals." Diss., Virginia Tech, 2004. http://hdl.handle.net/10919/27170.

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Nanoindentation is an increasingly used tool to investigate the mechanical properties of very small volumes of material. Gold single crystals were chosen as a model system for surface modification studies, because of the electrochemical advantages and the simple structure of the material. Experiments on these samples displayed a spectrum of residual deformation, with measured hardness values on the same surface differing by over a factor of two. The yield point also exhibited considerable variation, but the depth of penetration was independent of this elasticâ plastic transition. The onse
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11

Morasch, Kevin R. "Nanoindentation induced thin film fracture." Online access for everyone, 2005. http://www.dissertations.wsu.edu/Thesis/Spring2005/k%5Fmorasch%5F042605.pdf.

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12

Nibur, Kevin Andrew. "Nanoindentation slip steps and hydrogen embritlement." Online access for everyone, 2005. http://www.dissertations.wsu.edu/Dissertations/Summer2005/k%5Fnibur%5F071305.pdf.

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13

Li, Han. "The nanoindentation size effects of creep." Click to view the E-thesis via HKUTO, 2004. http://sunzi.lib.hku.hk/hkuto/record/B30696380.

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14

Haque, Feza. "Nanoindentation of polymer and protein films." Thesis, Queen Mary, University of London, 2008. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.510875.

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15

Li, Han, and 李晗. "The nanoindentation size effects of creep." Thesis, The University of Hong Kong (Pokfulam, Hong Kong), 2004. http://hub.hku.hk/bib/B30696380.

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16

Selby, Alastair Phillip. "Nanoindentation of soft contact lens materials." Thesis, University of Manchester, 2012. https://www.research.manchester.ac.uk/portal/en/theses/nanoindentation-of-soft-contact-lens-materials(502085d8-3325-4ea8-926c-ad75b15a557d).html.

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The launch of silicone hydrogel contact lenses has led to a rise in the incidence of mechanically-related clinical complications, which is thought to be due to the increased stiffness of these materials compared to conventional hydrogel lens materials. The mechanical characteristics of hydrogel contact lenses have traditionally been investigated using tensile testing which investigated the bulk material characteristics. This thesis presents a study intended to establish a repeatable method for local mechanical measurement of hydrogel contact lenses using nanoindentation. Hydrogel materials in
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17

Pfetzing, Janine [Verfasser]. "Nanoindentation von NiTi-Formgedächtnislegierungen / Janine Pfetzing." Aachen : Shaker, 2009. http://d-nb.info/1159832773/34.

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18

Johnson, Lars. "Nanoindentation in situ a Transmission Electron Microscope." Thesis, Linköping University, Department of Physics, Chemistry and Biology, 2007. http://urn.kb.se/resolve?urn=urn:nbn:se:liu:diva-8333.

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<p>The technique of Nanoindentation <em>in situ</em> Transmission Electron Microscope has been implemented on a Philips CM20. Indentations have been performed on Si and Sapphire (<em>α-Al</em><em>2</em><em>O</em><em>3</em>) cut from wafers; Cr/Sc multilayers and <em>Ti</em><em>3</em><em>SiC</em><em>2</em> thin films. Different sample geometries and preparation methods have been evaluated. Both conventional ion and Focused Ion Beam milling were used, with different ways of protecting the sample during milling. Observations were made of bending and fracture of samples, dislocation nucleation and
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19

Breuils, Jacques. "Caractérisation par nanoindentation de surfaces métalliques fonctionnalisées." Thesis, Strasbourg, 2012. http://www.theses.fr/2012STRAD044.

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Les travaux de thèse se sont attachés à développer des outils permettant :(i) d'estimer par nanoindentation le niveau de contraintes résiduelles locales de type biaxial introduit dans un alliage d'aluminium 2050-T8. Nous proposons une méthode d'estimation qui couple des essais expérimentaux de nanoindentation, l'observation des empreintes résiduelles et une analyse numérique de l'effet de contraintes résiduelles élastiques biaxiales sur la géométrie des empreintes résiduelles d'indentation. et (ii) de déterminer par nanoindentation le comportement mécanique d'un film d'oxyde ultra-mince, d'épa
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20

Scholz, Torben. "Charakterisierung von Bariumtitanat mittels Nanoindentation und Rasterkraftmikroskopie." Göttingen Sierke, 2006. http://d-nb.info/986402141/04.

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21

Tang, Allen. "Nanoindentation of peri-implant bone and dentin." Thesis, University of British Columbia, 2008. http://hdl.handle.net/2429/2648.

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Abstract (sommario):
Advances in the field of medicine have extended the average human life expectancy worldwide. As a result an increasing number of people will suffer from problems associated with their mineralized tissues and will require orthopedic and dental implants to restore their quality of life. Ideally, implants should have mechanical and structural properties compatible with the original mineralized tissue, and should also promote faster and stronger implant fixation. An improved understanding of the properties of mineralized tissues can help with the improvements of implants. This thesis focuses on im
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22

Stewart, Alistair. "Dynamic nanoindentation of various polymer nano-composites." Thesis, University of Ulster, 2012. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.593883.

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Abstract (sommario):
There is a strong rationale for replacing traditional carbon fibre and glass fibre composites with nano-composites as smaller size and higher aspect ratio reinforcement can lead to improved mechanical properties, via improved load transfer from reinforcement to polymer matrix but also increased dissipation of mechanical energy within the material, an advantage for maximising toughness and fatigue resistance. This project focuses on using dynamic nanoindentation to characterise polymer nano-composites made with graphene and carbon nanotubes (CNT), namely, CNT-polymethylmethacrylate (PMMA) compo
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23

Alsayegh, Rajab. "Vision-augmented molecular dynamics simulation of nanoindentation." Thesis, Brunel University, 2016. http://bura.brunel.ac.uk/handle/2438/13660.

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This thesis has contributed to the literature by providing a pathway to simplify the process of carrying out molecular dynamics simulation. As a part of the investigation, a user-friendly vision-augmented technique was developed to set up and carry out atomistic simulations using hand-gestures. The system is novel in its concept as it enables the user to directly manipulate the atomic structures on the screen, in 3D space using hand gestures, allowing the exploration and visualisation of molecular interactions at different relative conformations. The hand gestures are used to pick and place at
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24

Mason, Jeremy K. (Jeremy Kyle). "Statistical physics of dislocation nucleation by nanoindentation." Thesis, Massachusetts Institute of Technology, 2005. http://hdl.handle.net/1721.1/32914.

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Thesis (S.B.)--Massachusetts Institute of Technology, Dept. of Physics, 2005.<br>Page 82 blank.<br>Includes bibliographical references (page 79-81).<br>Current understanding of the onset of plasticity during nanoindentation of crystalline materials involves homogenous dislocation nucleation in the crystal underneath the indenter. Through the use of cutting-edge nanoindentation techniques, this study examines the initiation of plastic deformation in single crystal oriented platinum samples. Variations in the temperature and loading rate during indentation reveal temporal and thermal dependencie
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25

Gathier, Benjamin. "Multiscale strength homogenization : application to shale nanoindentation." Thesis, Massachusetts Institute of Technology, 2008. http://hdl.handle.net/1721.1/43049.

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Thesis (S.M.)--Massachusetts Institute of Technology, Dept. of Civil and Environmental Engineering, 2008.<br>Includes bibliographical references (p. 236-246).<br>Shales are one of the most encountered materials in sedimentary basins. Because of their highly heterogeneous nature, their strength prediction for oil and gas exploitation engineering has long time been an enigma. In this thesis, we propose a two-scale non-linear procedure for the homogenization of their yield design strength properties, based on the Linear Comparison Composite Theory. At Level 0, the intrinsic friction of shales is
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26

Molina, Aldareguia Jon Mikel. "Processing and nanoindentation behaviour of nitride multilayers." Thesis, University of Cambridge, 2002. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.620432.

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27

Gibbons, Melissa Marie. "Computational mechanics of nanoindentation of viral capsids." Diss., Restricted to subscribing institutions, 2008. http://proquest.umi.com/pqdweb?did=1709825191&sid=4&Fmt=2&clientId=1564&RQT=309&VName=PQD.

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28

Clausner, André. "Bewertung von Verfahren zur Fließspannungsbestimmung in der Nanoindentation." Doctoral thesis, Universitätsbibliothek Chemnitz, 2013. http://nbn-resolving.de/urn:nbn:de:bsz:ch1-qucosa-124038.

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Die Nanoindentation ist ein inzwischen etabliertes Verfahren zur Bestimmung der Materialkennwerte Härte und Elastizitätsmodul in kleinen Größendimensionen. Eine zusätzliche Bestimmung der Fließspannung aus solchen Nanoindentationsexperimenten würde deren Einsatzmöglichkeiten deutlich erweitern und zum Beispiel für die Bauteilauslegung kleiner Strukturen, Schichtcharakterisierung und die Beschaffung von Simulationseingangsdaten einen großen Fortschritt bedeuten. Diese Gründe machen das Thema zu einem aktuellen Forschungsgegenstand. In der vorliegenden Arbeit steht deswegen die Bewertung von Fli
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29

Chalasani, Praveen K. "Nanoindentation of Layered Materials with a Nonhomogeneous Interface." Scholar Commons, 2006. http://scholarcommons.usf.edu/etd/3902.

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Abstract (sommario):
Indentation is used as a technique for mechanical characterization of materials for a long time. In the last few decades, new techniques of mechanical characterization at micro and nano level using indentation have been developed. Mechanical character-ization of thin films has become an important area of research because of their crucial role in modern technological applications. Theoretical and computational models of indentation are less time consuming,cost effective, and flexible. Many researchers have investigated mechanical properties of thin films using theoretical and computational mode
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30

Kavalur, Aditya Vijay. "Nanoindentation of Crystalline Materials Using a Multiscale Methodology." University of Cincinnati / OhioLINK, 2020. http://rave.ohiolink.edu/etdc/view?acc_num=ucin1592133016715324.

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31

Moharrami, Noushin. "Extracting reliable mechanical properties using the nanoindentation technique." Thesis, University of Newcastle upon Tyne, 2014. http://hdl.handle.net/10443/2738.

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Abstract (sommario):
Extracting the mechanical properties of thin films and small volumes of bulk materials through the use of nanoindentation is a well established technique but getting good data from all types of test sample is not always easy. Factors such as surface roughness and oxidation, density/porosity of the material, adhesion/detachment of a thin film, pile-up/sink-in, the presence of the substrate, as well as grain size and its distribution have a significant effect on the observed mechanical properties (e.g. Young’s modulus and hardness). Considerable differences between predicted and observed perform
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32

Barnoush, Afrooz. "Hydrogen embrittlement, revisited by in situ electrochemical nanoindentation." Aachen Shaker, 2007. http://d-nb.info/992479851/04.

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33

Gheewala, Ismail. "Multiscale modelling of nanoindentation of multi-layered systems." Thesis, Loughborough University, 2010. https://dspace.lboro.ac.uk/2134/34987.

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This thesis presents molecular dynamics simulations of nanoindentation and nanoscratching simulations on a number of oxide. materials. In particular, the oxides studied are used as thin films in optical coatings. These films provide a variety of different functionalities, including reducing infra-red transmission through the glass to lower the heating and cooling costs for buildings. Simulations are performed initially on magnesium oxide, which is studied as a test material due to the simple structure. Simulations are then performed on the rutile and anatase polymorphs of titanium dioxide, whi
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34

De, Bono Damaso M. "Inverse analysis and microstructure effects in nanoindentation testing." Thesis, University of Surrey, 2017. http://epubs.surrey.ac.uk/841572/.

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Inverse analysis of nanoindentation data has attracted increasing interest in industry due to its ability to estimate the bulk tensile properties of materials and potentially offers an alternative technique to conventional characterisation methods. Inverse analysis of nanoindentation data is particularly valuable in applications where conventional techniques are not suitable due to either the scale of characterisation (very small regions) or because the testing is expensive and time consuming. Despite using best practices to minimise sources of error in the experimental data, given the scale o
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35

Cuadrado, Lafoz Núria. "Micromechanical characterization of small volumes by means of nanoindentation." Doctoral thesis, Universitat Politècnica de Catalunya, 2013. http://hdl.handle.net/10803/130025.

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Mechanical characterization of micro-volume systems, as thin films or micro-sized phases embedded in multiphase materials, has attracted special interest in the last decades since different micromechanical techniques have been developed to characterize microdevices and materials at the micro and nano scale and it has become apparent that mechanical properties may depend on the analysis scale. An example is the way a crack grows in a bulk material that is likely to be different from crack propagation in a micro-volume where crack and microstructural dimensions are comparable. Consequently, th
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36

Keung, Lok Hang. "Experimental investigation of size effect in nanoindentation on epoxy /." View abstract or full-text, 2006. http://library.ust.hk/cgi/db/thesis.pl?MECH%202006%20KEUNG.

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37

Ziegenhain, Gerolf [Verfasser]. "Atomistische Simulation von Nanoindentation / Dr. Gerolf Ziegenhain. TU Kaiserslautern." Kaiserslautern : Dr. Gerolf Ziegenhain c/o TU Kaiserslautern, 2009. http://gerolf.ziegenhain.com.

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38

Davies, Michael I. "High temperature nanoindentation characterisation of P91 and P92 steel." Thesis, University of Nottingham, 2013. http://eprints.nottingham.ac.uk/13233/.

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Modern demands in power generation call for higher efficiencies from every area of the power plant. One aspect of this is a drive to increase plant operating temperatures placing higher demand on structural materials. P91 and P92 are two steels commonly used in steam pipes. In order to accurately predict the service lifetime of components, mechanical properties at operating temperatures are critical. In particular properties of material around weld fusion joints are of interest as it is in these regions where failures occur. Conventional techniques such as Vicker’s hardness testing and uniaxia
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39

Rajagopalan, Sudhir. "INSTRUMENTED NANOINDENTATION STUDIES OF DEFORMATION IN SHAPE MEMORY ALLOYS." Doctoral diss., University of Central Florida, 2005. http://digital.library.ucf.edu/cdm/ref/collection/ETD/id/3283.

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Near equi-atomic nickel titanium (NiTi) shape memory alloys (SMAs) are a class of materials characterized by their unique deformation behavior. In these alloys, deformation mechanisms such as mechanical twinning and stress induced phase transformation between a high symmetry phase (austenite) and a low symmetry phase (martensite) additionally occur and influence mechanical behavior and thus their functionality. Consequently, applications of SMAs usually call for precise phase transformation temperatures, which depend on the thermomechanical history and the composition of the alloy. Instrumente
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40

Vachhani, Shraddha J. "Stored energy maps in deformed metals using spherical nanoindentation." Diss., Georgia Institute of Technology, 2014. http://hdl.handle.net/1853/51813.

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Microstructure changes that occur during the deformation and heat treatments involved in wrought processing of metals are of central importance in achieving the desired properties or performance characteristics in the finished products. However, thorough understanding of the evolution of microstructure during thermo-mechanical processing of metallic materials is largely hampered by lack of methods for characterizing reliably their local (anisotropic) properties at the sub-micron length scales. Recently, remarkable advances in nanoindentation data analysis techniques have been made which now ma
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41

Gutiérrez, Berasategui R. Eva. "Determining the properties of thin-coated systems by nanoindentation." Thesis, University of Newcastle Upon Tyne, 2003. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.399329.

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42

Rastegar, Tohid Reza. "Nanoindentation of metallic materials : time-dependent and crystallographic effects." Thesis, University of Newcastle Upon Tyne, 2007. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.445580.

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43

Lim, Yong Yee. "Nanoindentation hardness studies of metallic surfaces and thin films." Thesis, University of Cambridge, 2000. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.268686.

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44

ALMEIDA, CLARA MUNIZ DA SILVA DE. "CHARACTERIZATION OF MECHANICAL DEFECTS PRODUCED BY NANOINDENTATION IN INP." PONTIFÍCIA UNIVERSIDADE CATÓLICA DO RIO DE JANEIRO, 2009. http://www.maxwell.vrac.puc-rio.br/Busca_etds.php?strSecao=resultado&nrSeq=13442@1.

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CONSELHO NACIONAL DE DESENVOLVIMENTO CIENTÍFICO E TECNOLÓGICO<br>Nesta tese foi estudado o mecanismo de deformação mecânica de semicondutores III-V, em especial do InP, através da criação de defeitos utilizando um microscópio de força atômica e o indentador Triboscope. A liberdade de torção da ponta do AFM dificulta o controle e a reprodutibilidade dos experimentos de nanoindentação, por outro lado, através desta liberdade da técnica foi possível medir a pressão necessária para a criação das primeiras discordâncias no cristal. Foi realizado um estudo da deformação mecânica do óxido nativo pres
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45

Delafargue, A. (Antoine) 1981. "Material invariant properties of shales : nanoindentation and microporoelastic analysis." Thesis, Massachusetts Institute of Technology, 2004. http://hdl.handle.net/1721.1/28625.

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Thesis (S.M.)--Massachusetts Institute of Technology, Dept. of Civil and Environmental Engineering, February 2005.<br>Includes bibliographical references (p. 228-236).<br>Shales compose the major part of sedimentary rocks and cover most of hydrocarbon bearing reservoirs. Shale materials are probably one of the most complex natural composites, and their mechanical properties are still an enigma that has deceived many decoding attempts from experimental and theoretical sides. Advanced experimental techniques, such as nanoindentation, and theoretical microporomechanics make it possible today to b
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46

Venkovic, Nicolas. "Nanoindentation relaxation study and micromechanics of Cement-Based Materials." Master's thesis, Université Laval, 2016. http://hdl.handle.net/20.500.11794/27066.

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Ce travail évalue le comportement mécanique des matériaux cimentaires à différentes échelles de distance. Premièrement, les propriétés mécaniques du béton produit avec un bioplastifiant à base de microorganismes efficaces (EM) sont etudiées par nanoindentation statistique, et comparées aux propriétés mécaniques du béton produit avec un superplastifiant ordinaire (SP). Il est trouvé que l’ajout de bioplastifiant à base de produit EM améliore la résistance des C–S–H en augmentant la cohésion et la friction des nanograins solides. L’analyse statistique des résultats d’indentation suggère que le b
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47

Guduguntla, Varun. "Effects of Thermostats in Molecular Dynamics Simulations of Nanoindentation." University of Cincinnati / OhioLINK, 2019. http://rave.ohiolink.edu/etdc/view?acc_num=ucin1573573614853041.

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48

Hemmasizadeh, Ali. "Characterization of Heterogeneous Material Properties of Aorta Using Nanoindentation." Diss., Temple University Libraries, 2013. http://cdm16002.contentdm.oclc.org/cdm/ref/collection/p245801coll10/id/240046.

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Mechanical Engineering<br>Ph.D.<br>Arterial mechanical properties have received increasing attention in the past few decades due to their vast effect on predicting cardiovascular diseases and injuries. The heterogeneity of thoracic aortic tissue was characterized in terms of viscoelastic material properties and correlations were obtained between these properties and tissue morphology. Additionally, the effect of material preservation on the material properties was determined. Changes in the mechanical properties of porcine thoracic aorta wall in the radial direction were characterized using a
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49

Du, Ke. "Noval nanoindentation-based techniques of MEMS and microfluidics applications." [Tampa, Fla] : University of South Florida, 2008. http://purl.fcla.edu/usf/dc/et/SFE0002778.

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50

Cakiroglu, Dilek. "An exploratory investigation of viscoelastic nanoindentation on polyvinyl acetate." Click HERE to connect, 2009. http://digital.library.okstate.edu/etd/Cakiroglu_okstate_0664M_10174.pdf.

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