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Dissertations / Theses on the topic 'Elastic force'

Author: Grafiati
Published: 28 May 2022
Last updated: 31 July 2025

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1

Bischofs, Ilka Bettina. "Elastic interactions of cellular force patterns." Phd thesis, [S.l. : s.n.], 2004. http://deposit.ddb.de/cgi-bin/dokserv?idn=973638915.

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2

Chtangeev, Maxim B. "Neutron-deuteron elastic scattering and three-nucleon force." Thesis, Massachusetts Institute of Technology, 2005. http://hdl.handle.net/1721.1/32311.

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Thesis (S.M.)--Massachusetts Institute of Technology, Dept. of Physics, 2005.<br>Includes bibliographical references (p. 155-156).<br>The differential cross section for neutron-deuteron elastic scattering was measured at six angles over the center-of-mass angular range 65⁰ - 1300⁰ and incident neutron energies 140 - 240 MeV at the LANSCE/WNR facility of the Los Alamos National Laboratory. Witala et al. (H. Witala et al. ), Phys. Rev. Lett. 81, 1183 (1998) have suggested that the differential cross section for nucleon-deuteron scattering at large angles may be sensitive to the presence of a thr
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3

Campoli, Andrea. "MECHANCIAL PROPERTIES OF ELASTIC THREAD FORCE SYSTEMS IN CANINE EXPOSURES AND APPLICATION OF FORCE." Master's thesis, Temple University Libraries, 2019. http://cdm16002.contentdm.oclc.org/cdm/ref/collection/p245801coll10/id/591232.

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Oral Biology<br>M.S.<br>Objectives: To investigate differences in the modulus of elasticity, tensile strength, and load at breakage for elastic thread alone and elastic thread with gold chain in combination used in force application of palatally impacted and exposed maxillary canines. Methods: Two groups with n=6 in each were tested. A circular portion of elastic thread was cut, tied and measured to the nearest hundredth of a millimeter and recorded. Five links of a gold chain were cut and an elastic thread was tied to the fifth link opposite the bondable eyelet. The length of the elastic thre
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4

Ziebarth, Noel Marysa. "Atomic Force Microscopy Measurement of the Elastic Properties of the Lens." Scholarly Repository, 2008. http://scholarlyrepository.miami.edu/oa_dissertations/181.

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The goal of this project was to develop techniques and instrumentation to measure the elastic properties of the lens and lens capsule in situ and their changes with age using Atomic Force Microscopy (AFM). The studies include the construction, characterization, and calibration of laboratory-based Atomic Force Microscope (AFM) to measure mechanical properties of ophthalmic tissues. Atomic Force Microscopy is a nanoscale imaging technique that has been applied to mechanical property measurement through nanoindentation. Young's modulus of elasticity is determined by monitoring the cantilever d
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5

Vincent, Abhilash. "Probing the Nanoscale Interaction Forces and Elastic Properties of Organic and Inorganic Materials Using Force-Distance (F-D) Spectroscopy." Doctoral diss., University of Central Florida, 2010. http://digital.library.ucf.edu/cdm/ref/collection/ETD/id/4251.

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Due to their therapeutic applications such as radical scavenging, MRI contrast imaging, Photoluminescence imaging, drug delivery, etc., nanoparticles (NPs) have a significant importance in bio-nanotechnology. The reason that prevents the utilizing NPs for drug delivery in medical field is mostly due to their biocompatibility issues (incompatibility can lead to toxicity and cell death). Changes in the surface conditions of NPs often lead to NP cytotoxicity. Investigating the role of NP surface properties (surface charges and surface chemistry) on their interactions with biomolecules (Cells, pro
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6

Heo, Cheol Ho. "Directly Measuring the Adhesive and Elastic Properties of Bacteria using a Surface Force Apparatus." Diss., The University of Arizona, 2006. http://hdl.handle.net/10150/196035.

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Bacterial adhesion is the first step of biofilm formation that plays various roles in the environment and the human body. Examples of undesirable roles of biofilm formation include metal rust, sewage sludge and bacteria-related diseases. Desirable roles are biofiltration and bioremediation.For a decade, Atomic Force Microscopy (AFM) has been the primary tool used to study the adhesion and elastic properties of individual bacteria. In this work we show it is possible to use a Surface Forces Apparatus (SFA) to measure elastic and adhesive properties of small collections of surface bound bacte
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7

Bisha, James Victor. "Correlation of the Elastic Properties of Stretch Film on Unit Load Containment." Diss., Virginia Tech, 2012. http://hdl.handle.net/10919/27992.

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The purpose of this research was to correlate the applied material properties of stretch film with its elastic properties measured in a laboratory setting. There are currently no tools available for a packaging engineer to make a scientific decision on how one stretch film performs against another without applying the film. The system for stretch wrap comparison is mostly based on trial and error which can lead to a significant loss of product when testing a new film or shipping a new product for the first time. If the properties of applied stretch film could be predicted using a tensile test
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8

Lawrence, Michael A. "Effects of elastic resistance on concentric force, concentric power, and eccentric velocity during the bench press." CardinalScholar 1.0, 2010. http://liblink.bsu.edu/uhtbin/catkey/1567419.

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Elastic bands are becoming more popular in strength and power training. Although increases in strength and power have been anecdotally reported with high loads of elastic resistance, there is no research on large band tensions and their effects on force and power variables. The purpose of this study was to quantify peak concentric force, peak concentric power and peak eccentric velocity produced by the subject when using differing levels of elastic resistance (0%, 20%, 50% and 75% of the total load being elastic resistance) in the bench press. Seven experienced male powerlifters and body build
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9

Laubie, Hadrien Hyacinthe. "Elastic properties and failure behavior of disordered porous solids : a potential-of-mean-force-based lattice element approach." Thesis, Massachusetts Institute of Technology, 2017. http://hdl.handle.net/1721.1/111443.

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Thesis: Ph. D. in Mechanics of Materials, Massachusetts Institute of Technology, Department of Civil and Environmental Engineering, 2017.<br>Cataloged from PDF version of thesis.<br>Includes bibliographical references (pages 165-175).<br>The effective mechanical properties of multiphase materials not only depend on the volume fraction and chemical composition of their constituents but also on details of their local texture. Yet, most homogenization methods do not take this texture effect into account. Understanding how local texture affects the overall elastic and failure properties of heterog
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10

Verma, Himanshu Kumar. "Nanomechanical and Nanotribological Characterization of Sub-Micron Polymeric Spheres." Scholar Commons, 2015. http://scholarcommons.usf.edu/etd/5791.

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Friction between nanoscale objects has been a subject of great interest and intense research effort for the last two decades. However, the vast majority of the work done in this area has focused upon the sliding friction between two rigid, atomically smooth surfaces. Thus the parameter most explored has been the corrugation in the atomic potentials and how this affects the force required to slide one object across another. In truth, many nanoscale objects whose translation force is of practical interest are more spherical in nature. We hypothesize that the factors that determine the translatio
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11

Morris, Julia Kathleen. "Mechanical properties of phospholipid coated microbubbles." Thesis, University of Edinburgh, 2014. http://hdl.handle.net/1842/9979.

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Phospholipid coated, inert gas filled microbubbles (MBs) are currently in widespread use in medical applications for the enhancement of diagnostic ultrasound images, and they are promising candidates for use in the area of targeted drug/gene delivery and uptake. As phospholipid coated MBs were developed for use with diagnostic ultrasound, their behaviour under acoustic loading is well investigated, however much less is known about their response to direct mechanical loading, which will potentially prove important as the range of uses of MBs expands. This is particularly true of the existing co
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12

Webster, Stephen. "Prospects for Bose-Einstein condensation in caesium : cold collisions and dipole-force trapping." Thesis, University of Oxford, 2000. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.325563.

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13

Cai, Shaobiao. "3D numerical modeling of dry/wet contact mechanics for rough, multilayered elastic-plastic solid surfaces and effects of hydrophilicity/hydrophobicity during separation with applications." Columbus, Ohio : Ohio State University, 2008. http://rave.ohiolink.edu/etdc/view?acc%5Fnum=osu1205118488.

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14

Chen, Xiaolei. "Experimental and theoretical studies of incompatibility and dislocation pile-up stresses at grain boundaries accounting for elastic and plastic anisotropies." Electronic Thesis or Diss., Université de Lorraine, 2020. http://www.theses.fr/2020LORR0089.

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Les propriétés mécaniques des matériaux métalliques dépendent fortement du comportement des dislocations, telles que la densité, la distribution, la nucléation et la mobilité des dislocations ainsi que les interactions entre les dislocations et les joints de grain (JDGs). L'objectif principal de cette thèse est d'étudier les effets des anisotropies élastiques et plastiques sur l'interaction de dislocations-JDG en considérant les propriétés complexes des JDGs, les effets de désorientation et les effets de surfaces libres. Pour atteindre cet objectif, une approche analytique basée sur le formali
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15

Mermod, Philippe. "Neutron-Deuteron Scattering and Three-Body Interactions." Doctoral thesis, Uppsala : Acta Universitatis Upsaliensis, 2006. http://urn.kb.se/resolve?urn=urn:nbn:se:uu:diva-6739.

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16

Zhang, Boshu. "Bistable and multi-stable thin-walled structures." Thesis, University of Oxford, 2017. https://ora.ox.ac.uk/objects/uuid:05e0e48f-2da6-4d53-914a-cc1b46b9e87d.

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This study aims to comprehend the bistable and multi-stable behaviour of flexible straws with the intention of utilising it for future engineering applications. This behaviour is achieved by the multiple inversions of conical frustum shells within the corrugation of a flexible straw. This study examined the effects of various material models, geometry variables and loading methods on the inversion of close-top and open-top conical frustum shells via experiments and FEM simulations. This thesis consists of three main parts, and the second and the third parts are complementary to each other: Fir
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17

Алексеєнко, Дмитро Михайлович, Дмитрий Михайлович Алексеенко, Dmytro Mykhailovych Alekseienko та А. А. Синтер. "Упругое шлифование с продольной подачей под действием составляющей силы резания". Thesis, Сумский государственный университет, 2014. http://essuir.sumdu.edu.ua/handle/123456789/39980.

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Широкое распространение в металлообработке имеет шлифование, при котором движение продольной подачи осуществляется под действием одной из составляющих сил резания, например, бесцентровое, когда осевое перемещение детали обеспечивает осевая составляющая Px.
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18

Bílek, Vojtěch. "Konstrukční návrh závěsu zadního víka osobního automobilu." Master's thesis, Vysoké učení technické v Brně. Fakulta strojního inženýrství, 2018. http://www.nusl.cz/ntk/nusl-378140.

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The thesis deals with the issue of suspension of the 5th passenger car door. The introductory part deals with the possibilities of mounting the 5th passenger car door. In the next part, a HDS hinge was selected, which is further solved using a numerical and experimental method. Aluminium alloy was used on this HDS hinge to reduce weight. In the first step, a technical experiment was performed on the existing state (steel) and a strain-strain analysis was performed. Based on the stress-strain analysis of the material change variant without structural change, unsatisfactory results were obtained
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19

Клюєв, С. Ю., та І. М. Беда. "Експериментальні дослідження пружної сили шпаринного ущільнення довільної довжини". Thesis, Сумський державний університет, 2014. http://essuir.sumdu.edu.ua/handle/123456789/40417.

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Як показують теоретичні дослідження гідродинамічних сил шпаринних ущільнень, останні суттєво впливають на динамічні характеристики ротора: виникаючі в ущільненні гідродинамічні сили в залежності від конструкції та умов роботи ущільнення можуть або знижувати віброактивність ротора, або навпаки, обумовлювати його динамічну нестійкість. Але число експериментальних досліджень цієї проблеми невелике. В більшості робіт розглядаються моделі так званих коротких ущільнень, в яких окружною складовою швидкості руху рідини, обумовленої полем тиску, нехтують. Досліджень, де окружна складова потоку в щілин
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20

Pazesh, Samaneh. "Process-induced disorder of pharmaceutical materials : Mechanisms and quantification of disorder." Doctoral thesis, Uppsala universitet, Institutionen för farmaci, 2017. http://urn.kb.se/resolve?urn=urn:nbn:se:uu:diva-317801.

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One of the most important prerequisites in the drug development is to attain a reproducible and robust product in terms of its nature, and its chemical and physical properties. This can be challenging, since the crystalline form of drugs and excipients can be directly transformed into the amorphous one during normal pharmaceutical processing, referred to as process-induced amorphisation or process-induced disorder. The intention of this thesis was to address the mechanisms causing disorder during powder flow and milling and, in association with this, to evaluate, the ability of Raman spectrosc
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21

Mege, Fabrice. "AFM à contact résonant : développement et modélisation." Phd thesis, Université de Grenoble, 2011. http://tel.archives-ouvertes.fr/tel-00618676.

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Avec l'intégration de circuits intégrés de plus en plus denses, le besoin d'outils de caractérisation adaptés à ces échelles se fait ressentir. Identifier et analyser les problèmes de fiabilité survenant dans ces structures à des dimensions inférieures à 100 nm demande la mise au point d'instruments innovants. Ce travail de thèse a consisté dans un premier temps à développer un appareil à champs proches sensible aux propriétés mécaniques de surface, et dans un second temps à analyser les résultats expérimentaux en s'appuyant sur des approches analytiques et/ou numériques. Désigné sous le nom d
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22

Wang, Zhixin. "Polydimethylsiloxane Mechanical Properties Measured by Macroscopic Compression and Nanoindentation Techniques." Scholar Commons, 2011. http://scholarcommons.usf.edu/etd/3402.

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In this thesis, the relationship between the elastic modulus of PDMS and the base/agent ratio (the amount of crosslinking) is studied. Reliable macroscopic compression test instrument was developed. Preload method was applied for the nanoindentation flat punch test to develop full contact. In chapter 2, an easy instrument setup for macroscopic compression test is described. A series of PDMS samples with different base/agent ratios were tested using the macroscopic compression method. The relationship between PDMS elastic modulus and its base/agent ratio was established. In chapter 3, PDMS nano
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23

Benatti, Leandra Navarro. "Estudo da força gerada pelo grupo muscular isoquiotibial em exercícios resistidos." Universidade de São Paulo, 2005. http://www.teses.usp.br/teses/disponiveis/82/82131/tde-29032006-083914/.

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O desenvolvimento de protocolos de fortalecimento muscular, tanto na reabilitação quanto no treinamento, é realizado por exercícios resistidos, os quais envolvem a aplicação de sobrecargas externas ao músculo exercitado. Estas sobrecargas podem ser do tipo constante ou variável. Dentre os recursos existentes para a aplicação da resistência variável, os tubos elásticos são amplamente utilizados por sua versatilidade e viabilidade econômica. No entanto, é um material que ainda não possui parâmetros de aplicação claramente delineados. Alguns estudos realizaram a caracterização biomecânica dos mat
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24

Moore, Sean O'Neill. "QUANTIFYING THE BIOMECHANICAL FORCES BETWEEN PROTEINS INVOLVED IN ELASTIN SYNTHESIS USING ATOMIC FORCE MICROSCOPY." Cleveland State University / OhioLINK, 2018. http://rave.ohiolink.edu/etdc/view?acc_num=csu1546450170942598.

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25

Schwarz, Ulrich Sebastian. "Forces and elasticity in cell adhesion." Thesis, Universität Potsdam, 2004. http://opus.kobv.de/ubp/volltexte/2005/110/.

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Das Verhalten adhärenter Zellen hängt stark von den chemischen, topographischen und mechanischen Eigenschaften ihrer Umgebung ab. Experimentelle Untersuchungen der letzten Jahre haben gezeigt, dass adhärente Zellen aktiv die elastischen Eigenschaften ihrer Umgebung erkunden, indem sie an dieser ziehen. Der resultierende Kraftaufbau hängt von den elastischen Eigenschaften der Umgebung ab und wird an den Adhäsionskontakten in entsprechende biochemische Signale umgewandelt, die zelluläre Programme wie Wachstum, Differenzierung, programmierten Zelltod und Zellbewegung mitbestimmen. Im Allgemeinen
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26

Medeiros, Maria Isabel Dantas de. "Efeito in vitro de vernizes fluoretados contendo NaF e TiF4 nas propriedades nanomecânicas e de superfície do esmalte dentário submetido à erosão." Universidade Federal da Paraí­ba, 2014. http://tede.biblioteca.ufpb.br:8080/handle/tede/6653.

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Made available in DSpace on 2015-05-14T12:56:02Z (GMT). No. of bitstreams: 1 arquivototal.pdf: 1634368 bytes, checksum: 15995bdf9c8fa3e54e6dbaeeb501003d (MD5) Previous issue date: 2014-02-17<br>Coordenação de Aperfeiçoamento de Pessoal de Nível Superior<br>Objectives: To analyze the effect of NaF and TiF4 varnishes on nanohardness (N) and elastic modulus (E) of enamel surface after very short exposure time to simulation of drinking a can of soft drink; and evaluate the thickness and topography of protective layer formed, by atomic force microscopy (AFM). Methods: Thirty blocks of human ename
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27

Grondin, Jérémy. "Apport de la nanoindentation et de la microscopie à force atomique pour la compréhension des propriétés élastiques d’un polymère semi-cristallin aux différentes échelles microstructurales." Electronic Thesis or Diss., Chasseneuil-du-Poitou, Ecole nationale supérieure de mécanique et d'aérotechnique, 2024. http://www.theses.fr/2024ESMA0023.

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Cette thèse vise à approfondir la compréhension des relations entre le module d’élasticité d’un polypropylène isotactique (iPP) et sa microstructure à différentes échelles. Une approche expérimentale multi-échelle originale est développée, combinant essais d’indentation et microscopie à force atomique (AFM) pour la caractérisation du module d’élasticité et de la morphologie tridimensionnelle des sphérolites. Le travail s'articule autour de quatre axes : (i) la caractérisation de la morphologie sphérolitique par AFM, (ii) des essais d’indentation à diverses échelles en utilisant différentes tec
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28

Bosi, Federico. "Eshelby-like forces in elastic structures: theory, experiments and applications." Doctoral thesis, Università degli studi di Trento, 2014. https://hdl.handle.net/11572/367619.

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The Eshelbian force is the main concept of a celebrated theoretical framework associated with the motion of dislocations and, more in general, defects in solid. Similarly, it is proven that a force driving the configuration of an elastic structure is generated through the motion and release mechanism of flexural and torsional energy. This configurational force, analytically derived through different approaches and experimentally validated, provides counterintuitive but crucial effects in elasticity. In particular, it affects equilibrium paths in systems with variable length and instabilities,
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Bosi, Federico. "Eshelby-like forces in elastic structures: theory, experiments and applications." Doctoral thesis, University of Trento, 2014. http://eprints-phd.biblio.unitn.it/1369/1/PhD_thesis_Bosi_Federico.pdf.

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The Eshelbian force is the main concept of a celebrated theoretical framework associated with the motion of dislocations and, more in general, defects in solid. Similarly, it is proven that a force driving the configuration of an elastic structure is generated through the motion and release mechanism of flexural and torsional energy. This configurational force, analytically derived through different approaches and experimentally validated, provides counterintuitive but crucial effects in elasticity. In particular, it affects equilibrium paths in systems with variable length and instabilities,
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30

Misseroni, Diego. "Experimental models of Elastic Structures: Tensile Buckling and Eshelby-like Forces." Doctoral thesis, Università degli studi di Trento, 2013. https://hdl.handle.net/11572/367912.

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Mechanical models have been invented, designed and realized to experimentally confirm unexpected behaviours theoretically predicted in elasticity: - instabilities and bifurcations occurring in structures under ‘tensile dead load’ and the influence of the constraint’s curvature; - the presence of an ‘Eshelby-like’ or ‘configurational’ force in structures with movable constraints. Furthermore, ‘classical’ features in elasticity have been substantied by testing small-scale models and observing: - linearity in the mechanical response of a truss-structure, confirming the usual ass
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Misseroni, Diego. "Experimental models of Elastic Structures: Tensile Buckling and Eshelby-like Forces." Doctoral thesis, University of Trento, 2013. http://eprints-phd.biblio.unitn.it/1120/1/thesis_misseroni.pdf.

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Mechanical models have been invented, designed and realized to experimentally confirm unexpected behaviours theoretically predicted in elasticity: - instabilities and bifurcations occurring in structures under ‘tensile dead load’ and the influence of the constraint’s curvature; - the presence of an ‘Eshelby-like’ or ‘configurational’ force in structures with movable constraints. Furthermore, ‘classical’ features in elasticity have been substantied by testing small-scale models and observing: - linearity in the mechanical response of a truss-structure, confirming the usual assumption of lin
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32

Leroy, Samuel. "Les forces de surface dynamiques pour l'investigation mécanique des surfaces molles." Phd thesis, Université Claude Bernard - Lyon I, 2010. http://tel.archives-ouvertes.fr/tel-00610528.

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Ce travail étudie comment la mesure des forces hydrodynamiques exercées par un liquide confiné entre une sphère et une surface d'intérêt permet de sonder à distance et sans contact les propriétés mécaniques de cette surface. Nous présentons tout d'abord le principe de cette technique originale de sonde fluide et la machine à forces de surface dynamique que nous utilisons pour mettre en oeuvre ces expériences de nano-rhéologie. Puis nous nous intéressons à deux applications que nous avons plus particulièrement étudiées. D'une part, l'étude des propriétés de friction des bicouches lipidiques. No
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Cedano, Serrano Francisco Javier. "From molecular architecture and electrostatic interactions to underwater adherence of hydrogels." Electronic Thesis or Diss., Sorbonne université, 2019. http://www.theses.fr/2019SORUS056.

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Ce travail essaie de décortiquer les multiples paramètres régissant l’adhésion en phase aqueuse de polymères chargés. Nous cherchons d’abord à établir un lien entre les interactions électrostatiques moléculaires et les différentes architectures moléculaires de matériaux gonflés élastiques (Parties I et II) ou viscoélastiques (Partie III), avant de nous intéresser à l’adhésion en milieu immergé. (Partie I) Le premier système modèle de matériaux synthétiques nous a permis de corréler l’architecture moléculaire des hydrogels élastiques, la densité de charge interfaciale, et la force ionique du mi
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34

Shao, Bing. "Applying optical forces and elastic light scattering for manipulation and analysis of biological objects." Connect to a 24 p. preview or request complete full text in PDF format. Access restricted to UC campuses, 2006. http://wwwlib.umi.com/cr/ucsd/fullcit?p3220416.

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Thesis (Ph. D.)--University of California, San Diego, 2006.<br>Title from first page of PDF file (viewed September 8, 2006). Available via ProQuest Digital Dissertations. Vita. Includes bibliographical references.
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35

Zakerin, Marjan [Verfasser]. "The effect of elastic modulus and equilibrium vapor adsorption on capillary forces / Marjan Zakerin." Mainz : Universitätsbibliothek Mainz, 2013. http://d-nb.info/1035261456/34.

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36

Souza, Samuel Teixeira de. "Microscopias de varredura por sondas aplicadas ao estudo de amostras biológicas, vítreas e cerâmicas." Universidade Federal de Alagoas, 2014. http://www.repositorio.ufal.br/handle/riufal/1701.

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In this work, scanning multiprobes microscopes were used to study the physical properties of biological, vitreous and ceramics samples. In particular, we have used three different scanning probe microscopy techniques to the study the samples. At first, an atomic force microscope was used to evaluate the mechanical properties of macrophages due to cell adhesion to an extracellular matrix and to study the changes in DNA molecules conformation treated with thymol and adsorbed onto a mica surface modified by poly-L-lysine. The results of these studies show that the cytoskeleton-mediated cell-matr
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37

Mikhaltsevitch, Vassili Timofeevitch. "Investigations of Elastic Properties of Isotropic and Anisotropic Rocks at Seismic Frequencies Using Forced-Oscillation Experiments." Thesis, Curtin University, 2017. http://hdl.handle.net/20.500.11937/59144.

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The thesis developed and validated an experimental forced-oscillation approach for low-frequency laboratory investigations of the elastic and anelastic properties of the main sedimentary rocks such as sandstones, carbonates and shales. The presented results demonstrate that the forced-oscillation approach is able to adequately quantify elastic and anelastic parameters of sedimentary rocks and can improve the efficiency of the seismic data interpretation and reservoir characterisation.
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38

Vijaywargiya, Raghvendra. "A finite element investigation of the deformations, forces, stress formations, and energy lossses in elasto-plastic sliding contacts." Thesis, Available online, Georgia Institute of Technology, 2006, 2006. http://etd.gatech.edu/theses/available/etd-05132006-131833/.

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Millsaps, Knox Taylor. "Analysis of aero-elastic forces in labyrinth seals and the design of an experimental facility to measure them." Thesis, Massachusetts Institute of Technology, 2017. http://hdl.handle.net/1721.1/109622.

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Majdič, Petr. "Napěťová, deformační a bezpečnostní analýza statoru generátoru zatíženého nehomogenní teplotou." Master's thesis, Vysoké učení technické v Brně. Fakulta strojního inženýrství, 2015. http://www.nusl.cz/ntk/nusl-231962.

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This thesis deals with stress, strain and reliability analysis of synchronous generator stator including an inhomogeneous temperature field. Using the finite element method, stress and strain are calculated, and from these values safety against yield strength is determined, which is followed by the life calculation of the most stressed weld joint and the determination of its possible damage during the period required by the customer.
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41

Schifani, Guido. "Forme et dynamique de boîtes quantiques sous contraintes élastiques." Thesis, Université Côte d'Azur (ComUE), 2018. http://www.theses.fr/2018AZUR4069/document.

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Le but de cette thèse est l'étude théorique de la dynamique du murissement des boites quantiques auto-organisées. Pour cela, nous déduisons en utilisant les outils de la mécanique des milieux continus, une équation pour l'évolution spatio-temporelle d'un film cristallin en hétéroépitaxie en prenant en compte les effets de diffusion de surface, les effets élastiques, les effets capillaires et les effets d'anisotropie d'énergie de surface. Nous étudions tout d'abord la morphologie 2D et la dynamique de boites quantiques isotrope et anisotrope. Dans chaque cas, nous trouvons de manière quasi anal
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Ahonguio, Fiacre. "Ecoulements de fluides à seuil autour d'obstacles." Thesis, Université Grenoble Alpes (ComUE), 2015. http://www.theses.fr/2015GREAI086/document.

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De nombreuses applications industrielles mettent en jeu des fluides complexes qui possèdent souvent un seuil d'écoulement leur permettant de résister à des efforts finis sans s'écouler. Par ailleurs, ces fluides peuvent glisser aux parois lorsque les conditions interfaciales sont favorables. Toutes ces propriétés influencent leurs écoulements autour d'obstacles. Cette thèse se propose de comprendre ces écoulements dans le domaine où les vitesses d'écoulement sont telles que les effets inertiels peuvent être négligés devant les effets visqueux eux-mêmes faibles par rapport aux effets plastiques
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43

Fergusson, Austin David. "Non-equilibrium Dynamics of Nanoscale Soft Matter Deformation." Thesis, Virginia Tech, 2014. http://hdl.handle.net/10919/50500.

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Life is soft. From the fluid-like structure of lipid bilayers to the flexible folding of proteins, the realm of nanoscale soft matter is a complex and vibrant area of research. The lure of personalized medicine, advanced sensing technology, and understanding life at a fundamental level pushes research forward. This work considers to areas: (1) lipid bilayer dynamics in the presence of substrate defects and (2) the inverse temperature transition of elastic proteins. Molecular dynamics simulations as well as umbrella sampling were employed. The behavior of the bilayers discussed in the work prov
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Chattopadhyay, Arka Prabha. "Free and Forced Vibration of Linearly Elastic and St. Venant-Kirchhoff Plates using the Third Order Shear and Normal Deformable Theory." Diss., Virginia Tech, 2019. http://hdl.handle.net/10919/102661.

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Employing the Finite Element Method (FEM), we numerically study three problems involving free and forced vibrations of linearly and nonlinearly elastic plates with a third order shear and normal deformable theory (TSNDT) and the three dimensional (3D) elasticity theory. We used the commercial software ABAQUS for analyzing 3D deformations, and an in-house developed and verified software for solving the plate theory equations. In the first problem, we consider trapezoidal load-time pulses with linearly increasing and affinely decreasing loads of total durations equal to integer multiples of the
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Du, Peloux De Saint Romain Lionel. "Modeling of bending-torsion couplings in active-bending structures : application to the design of elastic gridshells." Thesis, Paris Est, 2017. http://www.theses.fr/2017PESC1209/document.

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Les structures de type gridshell élastique permettent de réaliser des enveloppes courbes par la déformation réversible d’une grille structurelle régulière initialement plane. Cette capacité à “former la forme” de façon efficiente prend tout son sens dans le contexte actuel où, d’une part la forme s’impose comme une composante prédominante de l’architecture moderne, et d’autre partl’enveloppe s’affirme comme le lieu névralgique de la performance des bâtiments. Fruit des recherches de l’architecte et ingénieur allemand Frei Otto dans les années 1960, elles ont été rendues popula
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Williamson, Matthew M. "Series Elastic Actuators." 1995. http://hdl.handle.net/1721.1/6776.

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This thesis presents the design, construction, control and evaluation of a novel force controlled actuator. Traditional force controlled actuators are designed from the premise that "Stiffer is better''. This approach gives a high bandwidth system, prone to problems of contact instability, noise, and low power density. The actuator presented in this thesis is designed from the premise that "Stiffness isn't everything". The actuator, which incorporates a series elastic element, trades off achievable bandwidth for gains in stable, low noise force control, and protection against shoc
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Shiue, Cheng-Shiun, and 薛成巽. "Photonics Force Microscopy Based Measurement of the Elastic Force of Double-Strand DNA." Thesis, 2006. http://ndltd.ncl.edu.tw/handle/66728346649772488987.

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碩士<br>國立陽明大學<br>生醫光電工程研究所<br>94<br>A �趁174 double-strand DNA fragment was generated using polymerase chain reaction (PCR) and then cloned into a pYES3/CT/LacZ vector, resulting in ��/Z. Plasmid ��/Z was used as the basis to generate single DNA molecular with digoxigenin on one end and biotin on the other end. The digoxigenin-labeled end is adhered to a small polystyrene particle coated anti-digoxigenin (2�慆 in diameter) in an optical trap, while the biotinylation end is adhered to a big polystyrene particle coated streptavidin (20�慆 in diameter). We made the big particle seating on a cover gla
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Mai, Chien-Cheng, and 買健誠. "Design of a Large-scale Sliding Hinge with Low Pushing Force and High Elastic Force." Thesis, 2011. http://ndltd.ncl.edu.tw/handle/c5tj9h.

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碩士<br>國立臺灣科技大學<br>機械工程系<br>99<br>For conventional semi-automatic sliding hinge mechanisms, the elastic force exerted by the mechanism can be much lower than the manual pushing force due to the effect of friction. When applying this conventional mechanism to large-scale products with sliding hinges, the manual pushing force required to allow the sliding cover to achieve enough elastic force would be too high; this is not advantageous for users during operation. This thesis proposes a novel semi-automatic sliding hinge mechanism for use in large-scale products with sliding hinge. This design has
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Bischofs-Pfeifer, Ilka [Verfasser]. "Elastic interactions of cellular force patterns / von Ilka Bettina Bischofs." 2004. http://d-nb.info/973638915/34.

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Liou, Chun-Bin, and 劉俊彬. "Elastic stability of cracked columns subjected to a partially follower force." Thesis, 1999. http://ndltd.ncl.edu.tw/handle/69700003785078085398.

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碩士<br>國立海洋大學<br>河海工程學系<br>87<br>This essay, based on the dynamic or kinetic approach and contour method, is dedicated to the study of the influence of the tangency coefficient, the depth of the crack, the location of the crack, the boundary conditions and the elastic restraints on the critical instability mechanism and critical buckling load of the Bernoulli-Euler column of the nonpropagating open cracks, whose material is subject to Hooke's law, which undertake the partially follower force. Firstly, by means of characteristic curves diagrams with changes in parameters, we notice that as the
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