Global ETD Search
Search theses and dissertations gathered from participating repositories worldwide. Every result links back to the library that holds it. No account is needed.
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Showing 1 to 20 of 27 for “"Elastomeric Materials"”.
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Condition Monitoring Sensor for Reinforced Elastomeric Materials
<p>In-situ monitoring of materials is a great problem in the field of structural health monitoring. The ability to receive real time data relaying the condition of a body is an elusive but invaluable goal. Even more difficult is monitoring the continuous body rather than a small subset of discrete …
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Mechanics of abrasive wear of elastomeric materials
Elastomeric materials are widely used as tire and sealing materials due to their ability to undergo large deformations and conform to the mating surface. However, their applications often result in repeated contact with abrasive particles, which act to abrasively wear the elastomers. Elastomeric …
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Large strain time-dependent behavior of elastomeric materials
The mechanical behavior of elastomeric materials is known to be rate-dependent and to exhibit hysteresis upon cyclic loading. Although these features of the rubbery constitutive response are well-recognized and important to its function, few models attempt to quantify these aspects of response. …
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Experimental characterization of a coupled deformation-diffusion theory for elastomeric materials
Certain cross-liked polymer networks can absorb solvents and swell far beyond their initial volume, a useful property which may be exploited in a variety of applications. In this thesis, polydimethylsiloxane (PDMS) samples were swollen in pentane in order to experimentally characterize the …
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Experimental and Theoretical Studies of Friction and Adhesion of Elastomeric Materials
… investigations of friction and adhesion of elastomeric materials, are presented. First, an experimental and theoretical study of the interaction between elastic beams and granular media under compressive loading is performed. Buckling loads of beams with different dimensions and boundary …
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Design and implementation of a high strain Town rate biaxial tension test for elastomeric materials and biological soft tissue
… tests are conducted on the various simulant materials in order to characterise their low strain rate behaviour. The composite skin simulant is characterised using a modified version of the anisotropic skin model developed by Weiss et al (1996) [4], and the pure silicone membranes are …
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Elastomeric grating sensor for multifunctional optofluidic biosensing
… for this purpose. Sensors based on deformable elastomeric materials have several benefits such as greater sensitivity, high spatial resolution, reliability and low cost. The Multifunctional Elastomeric Grating Sensor (EGS) presented in this thesis is fabricated using elastomeric materials. The …
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Dynamic Modeling of Soft Robotic Dielectric Elastomer Actuator
… actuators (DEAs) are among the preferred materials for developing lightweight, high compliance and energy efficient driven mechanisms for soft robots. Simple DEAs consist mostly of a homogeneous elastomeric materials that transduce electrical energy into mechanical deformation by means of …
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A methodology for developing high damping materials with application to noise reduction of railway track
For application in damping treatments, elastomeric materials should have a high<br/>damping loss factor, but this is inevitably linked to a strong temperature-dependence<br/>of the dynamic properties. A methodology is developed that allows a material to be formulated<br/>for a particular damping …
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Electrospinning applications in mechanochemistry and multi-functional hydrogel materials
… or mechanophores, are incorporated into materials. One mechanophore that has been heavily investigated is spiropyran, a molecule that exhibits a color change when activated, although large strains are required to achieve this activation in elastomeric materials. In addition to color …
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A study of the mechanical behavior of particle filled elastomers
The ability of elastomeric materials to undergo relatively large deformations in an elastic manner makes them the material of choice for a wide range of applications. Filler particles, such as carbon black, can be added to the elastomer to alter the mechanical behavior of the material when …
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Fabrication and Characterization of Multifunctional Soft Composites for Hybrid Electronic Systems
… an ever-increasing need for soft, functional materials within areas of research such as soft robotics, flexible electronics, and wearable devices. These materials must be stretchable and/or flexible, thermally and electrically conductive, and robustly adhesive to a wide variety of substrates …
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Water driven deformation in soft solids
… tension of water, which can deform soft materials. The effects that water droplets deforming in soft solids have need to be characterized in order to utilize these composites. When water is embedded in elastomeric materials, it can undergo transitions known as breathing, buckling, and …
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Preferential nanoreinforcement of thermoplastic polyurethane elastomers with dispersed nano-clay
It is difficult for scientists to engineer elastomeric materials that are both strong and tough like spider dragline silk. Inspired by the morphology of spider dragline silk and motivated to develop strong, tough, elastomeric polyurethanes to be used in soldier applications I have prepared …
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Between rigid and soft robotics : discrete assembly of heterogeneous cellular structures
… of robotics which utilizes highly compliant materials to create bio-inspired movement. The field is of high interest at the moment, as it presents new opportunities for adapting and navigating in environments difficult for conventional robotics. Despite these benefits, soft robotics still has …
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Characterization of the Viscoelastic Fracture of Solvated Semi-Interpenetrating Polymer Network Silicone Hydrogels
… as well as the highly deformable nature of these elastomeric materials, presents a myriad of challenges when attempting to understand their constitutive and fracture properties in order to improve hydrogel manufacturing and performance in applications. In this thesis, a series of experimental …
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Dynamic Studies of Instability-Triggered Intersonic Surface Detachment Waves in Soft Material Sliding
… regulated by energy redistribution. Among them, elastomeric materials sliding on smooth surfaces generate separation pulses due to tangential stress gradients. When the material slides at a speed much lower than those of elastic surface waves, the process is dominated by surface adhesion and …
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Elastomer Degradation in Chemically Reactive Environment under Elevated Temperature and Pressurized Condition
… to model the small molecule ingression in bulk elastomeric materials. Under high temperature and high pressure, chemical reaction accelerates and some of the processes that are negligible under standard temperature and pressure can have significant impacts on elastomer properties. For example, …
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Improving hydrophilicity of silicone elastomer by IPN formation with hyaluronan
… create an interpenetrating polymer network (IPN) materials of poly(dimethyl siloxane) (PDMS) and hyaluronan (HA) with such properties. The results in this work indicate the successful synthesis of these HA-PDMS IPN materials. These elastomeric materials had improved hydrophilicity compared to …
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Modelizado y optimización de problemas mecánicos no lineales mediante el Método de Elementos Finitos, RSM y ML
Elastomer materials have a non-linear mechanical behaviour, and can also admit large deformations. In order to correctly model these materials, it is not enough to obtain an elastic modulus and their elastic limit and rupture stresses. These materials require a more complex characterization, which …
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