Viscoelastic modelling of stress relaxation, creep and set recovery of the elastomers

چکیده مقاله

Modelling viscoelastic behavior of elastomers will aid to have better manufacturing and tooling design. In this article it is tried to model Cross-linked unfilled natural rubbers behavior under stresses up to moderate. Also their time dependent behavior of the elastomers under strain was investigated. Four models were used to predict the behavior of elastomers under different tests of stress-relaxation, creep and set recovery. Modified Generalized Maxwell model was used to predict stress relaxation test, Modified Generalized Kelvin, Modified 4-element and an improved model were used to predict creep response and set recovery. The improved model defined here had better accuracy in comparison with modified 4-element model to describe set recovery.  Models were verified with about 400 experimental data and good reasonable agreement achieved.

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