نتایج جستجو برای: viscoelastic solids
تعداد نتایج: 35582 فیلتر نتایج به سال:
A crack in a viscoelastic solid exhibits velocity jump, i.e., the propagation changes abruptly narrow range of applied load. However, mechanism had been unsolved until recently. This review introduces past findings on jumps solids, focusing our studies. We have developed an exactly solvable model that jump. From mathematical solution, we elucidated jump is caused by dynamic glass transition vic...
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...
In human airways diseases, including cystic fibrosis (CF) and chronic obstructive pulmonary disease (COPD), host defense is compromised and airways inflammation and infection often result. Mucus clearance and trapping of inhaled pathogens constitute key elements of host defense. Clearance rates are governed by mucus viscous and elastic moduli at physiological driving frequencies, whereas transp...
Viscoelastic materials have a relationship between stress and strain which depends on time or frequency. Anelastic solids represent a subset of viscoelastic materials: they have a unique equilibrium configuration and ultimately recover fully after removal of a transient load. Internal friction refers to the dissipative response of a material when subjected to a sinusoidal deformation. All mater...
Abstract When quickly detaching an elastomer from a counterface, viscoelasticity dramatically increases the perceived adhesion relative to its adiabatic or equilibrium value. Here, we report simulations on sticking contact between rigid cylinder and viscoelastic half space revealing maximum in work of separation at intermediate pull-off velocities. Maximum tensile forces yet increase monotonica...
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