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Creep and Relaxation of Nonlinear Viscoelastic Materials by William N. Findley, Kasif Onaran, Frances A. Davis

Creep and Relaxation of Nonlinear Viscoelastic Materials William N. Findley, Kasif Onaran, Frances A. Davis ebook
Publisher: Dover Publications
ISBN: 9780486660165
Format: pdf
Page: 400

Elements for the Numerical Analysis of Wave Motion in Finally a method is presented for the comparison and evaluation of the consistency of creep and relaxation data obtained by a set of independent experiments. Aleksey Drozdov and AlDorfmann [2] derive constitutive equations for the nonlinear viscoelastic behaviour after performing tensile relaxation tests. An age-dependent Maxwell chain model with four Maxwell elements was used to model stress relaxation and creep [41]. In addition, many materials of engineering importance exhibit significant nonlinear viscoelastic behavior in physical environments and under mechanical loading of practical interest, especially under high-temperature conditions. Yes i understand that Abaqus uses the creep data and converts it to relaxation data, through convolution integrals i think. I have used same One reason that QLV has persisted so long is that many people obtain one stress strain curve that shows nonlinearity, and one creep or relaxation curve that shows viscoelasticity. Section 3 deals with the problems associated with the determination of the Constitutive Equation of nonlinear viscoelastic materials. Wave Motion, Poro-Elasticity Problems and Constitutive Equation of Materials. To understand difference, I have generated simple stress relaxation experiment using Abaqus where different strain rates are applied into same model (kept constant a while) which has material property of viscoelastic (Prony ) + hyperelastic ( Mooney-Rivlin). Most of analytical [6-7] have applied the incremental formulation in order to evaluate creep crack growth process in viscoelastic media. When you say the data is not covering a wide enough range to accurately Also, polypropylene is a non-linear viscoelastic material (as are most polymers), and modelling viscoelasticity in Abaqus in the way outlined above only encompasses a linear viscoelastic response. Abstract This paper is concerned with the development of a new incremental formulation in the time domain for linear, non-aging viscoelastic materials undergoing mechanical deformation.