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

Creep and Relaxation of Nonlinear Viscoelastic Materials


Creep.and.Relaxation.of.Nonlinear.Viscoelastic.Materials.pdf
ISBN: 9780486660165 | 400 pages | 10 Mb


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Creep and Relaxation of Nonlinear Viscoelastic Materials William N. Findley, Kasif Onaran, Frances A. Davis
Publisher: Dover Publications



And Munz, D., Stress Intensity factors and Weight Functions , 1997. I am working on EVA (Ethylene-vinyl acetate) to identify its viscoelastic properties I have done relaxation, creep and tensile test on it. 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. 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. Aleksey Drozdov and AlDorfmann [2] derive constitutive equations for the nonlinear viscoelastic behaviour after performing tensile relaxation tests. Morrison (2001), Understanding Rheology, Oxford University Press, ISBN 0-19-514166-0 and 978-0195141665. 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. Failures arising from hasty material selection are not uncommon in plastics. 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. 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. The plate is made of nonlinear viscoelastic orthotropic material expressed by the Schapery single integral model. Et al., Creep and Relaxation of Nonlinear Viscoelastic Materials , 1990. G., Nonlinear Mechanics , 1998.





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