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Exponential model W (strain energy density function)- Zero stress zero strain condition

Submitted by maverick_269 on Mon, 04/08/2013 - 21:17

Hi,

I am new here and have a very basic question on the Strain Energy Density (SED) function of exponential model.

This is the exponential model SED form : W=a(e^(b(I₁-3))-1)

Now we have certain postulates such as that

1.W=0 when there is no deformation and

2. stress=0 when strain =0.

When there is no deformation I1=3 and hence W=0, which is correct.