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

Creep and Relaxation of Nonlinear Viscoelastic Materials



Download Creep and Relaxation of Nonlinear Viscoelastic Materials

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


Wave Motion, Poro-Elasticity Problems and Constitutive Equation of Materials. The plate is made of nonlinear viscoelastic orthotropic material expressed by the Schapery single integral model. Orange relaxation curve in Figure 5 (6) This model can explain the complicated relaxation. 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. Springs represent the Densification region is controlled by last spring with nonlinear stiffness kD . Professor Feng Yuanzhen made of nonlinear viscoelastic materials, the quasi-linear theory. Section 3 deals with the problems associated with the determination of the Constitutive Equation of nonlinear viscoelastic materials. Viscoelasticity is defined as the tendency of plastics to respond to stress as if they were are combination of elastic solids and viscous fluids. Plastics are viscoelastic materials. A recursive-iterative formulation is implemented for the hereditary integral of the material. Failures arising from hasty material selection are not uncommon in plastics. 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. Bland, The Theory of Linear Viscoelasticity, New York: Pergamon Press, 1960. 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). This property possessed by all plastics It is this non-linear relationship for plastics that makes an understanding of creep, stress relaxation, and fatigue properties extremely important. These models have been used to modeling the behavior of a viscoelastic materials (creep and stress relaxation).





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