Hi there,
I have the following test data .
1) Uniaxial tensile tests at strain rates edot1 and edot2 .
2) Stress relaxation tests at strain levels e1,e2,e3 and e4 where I apply the load at edot2 strain rate and hold the specimen at particular strain level for some time to observe the fall in stress.
Can someone suggest how I can get the parameters of PRF model for getting nonlinear viscoelasticity behavior? Also, the Hyperelasticity data fed in for evaluating viscoelasticity behavior should be the one corresponding to strain rate at which stress relaxation test is performed right?
P. K. Karmakar
Have you looked into
R. Lakes, Viscoelastic Materials, Cambridge Univ. Press, N.Y., 2009?
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