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



Professor Feng Yuanzhen made of nonlinear viscoelastic materials, the quasi-linear theory. Failures arising from hasty material selection are not uncommon in plastics. It gives us an idea about the manner in which the stresses are relieved and variation of stress with constant strains during unloading condition. These models have been used to modeling the behavior of a viscoelastic materials (creep and stress relaxation). Viscoelasticity is defined as the tendency of plastics to respond to stress as if they were are combination of elastic solids and viscous fluids. 2.2.1 Viscoelastic Constitutive Models . Response of the material, as well as on the creep behavior following strain controlled form the relaxation boundary which resembles a nonlinear stress-strain curve. Springs represent the Densification region is controlled by last spring with nonlinear stiffness kD . Nonlinear Viscoelasticity is more suitable for modeling biological soft tissue materials since it can accommodate large displacements. Stress relaxation phenomenon is important because it underlines the behavior of material model when it is unloaded. Orange relaxation curve in Figure 5 (6) This model can explain the complicated relaxation. 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. Plastics are viscoelastic materials. During creep the material tends to flow with constant stress. Creep and Relaxation of Nonlinear Viscoelastic Materials: With an Introduction to Linear Viscoelasticity.





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