نتایج جستجو برای: thermo viscoelasticity
تعداد نتایج: 16853 فیلتر نتایج به سال:
This paper addressed the case of an electrically heated asphalt pavement; it explored unconventional application such a system – not for combating snow and ice but mitigating low-temperature cracking. The investigation was done in silico, considering stratified medium to represent pavement system, thin heat-generating layer heating measured weather conditions from Greenland emulate cold region ...
Abstract The promising phase-field method has been intensively studied for crack approximation in brittle materials. realistic representation of material degradation at a fully evolved is still one the main challenges. Several energy split formulations have postulated to describe evolution physically. A recent approach based on concept representative elements (RCE) Storm et al. (The fracture: a...
In our previous study, the viscoelasticity of the radial artery wall was estimated to diagnose endothelial dysfunction using a high-frequency (22MHz) ultrasound device. In the present study, we employed a commercial ultrasound device (7.5MHz) and estimated the viscoelasticity using arterial pressure and diameter, both of which were measured at the same position. In a phantom experiment, the pro...
Enabling Design with Rheological Complexity: Intuition and Optimization of Viscoelastic Materials By
In this thesis, we seek to outline a methodology to enable engineering design based on rheologically complex materials. Traditionally, engineers choose hard materials or simple uids for design. Complex materials (soft solids and non-Newtonian uids) greatly increase the design space. Additionally, these materials add functionality (viscoelasticity, nonlinearity) that can achieve diverse performa...
A device especially designed for uniaxial creep test was used in this study. Cheddar cheeses of different fat content were used. To study the linear viscoelastic response of the cheese, temperature of 40 degrees C and stress of 1119.5 Pa were chosen. Tests were carried out at cheese ages of 1, 3, 6, and 12 wk after production date. A six-element Kelvin model was used to model the creep data. In...
Viscoelasticity and poroelasticity commonly coexist as time-dependent behaviors in polymer gels. Engineering applications often require knowledge of both behaviors separated; however, few methods exist to decouple viscoelastic and poroelastic properties of gels. We propose a method capable of separating viscoelasticity and poroelasticity of gels in various mechanical tests. The viscoelastic cha...
To characterize tissues in atherosclerotic plaques, we have developed a method, the phased tracking method, for measuring the strain (change in wall thickness) and elasticity of the arterial wall. However, some types of tissue, such as lipids and blood clots, cannot be discriminated from each other based only on elasticity due to the small difference in their elasticity. For more precise tissue...
Viscoelasticity and roughness are among the possible causes of adhesive hysteresis displayed by soft contacts. an increased effective work adhesion due to stiffening contact, while is responsible for elastic instabilities. Herein, we explore interplay between viscoelasticity simulating in two dimensions retraction a rigid cylinder, with wavy surface profile, from viscoelastic half-space. The wa...
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