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Maxwell viscoelastic model in ABAQUS
Sun, 2009-05-10 17:57 - ahmadalhajahmad
Hi Guys,
I have the shear relaxation modulus given as: G(t)=Go*EXP(-t/tau). In ABAQUS, the normalized shear modulus for one term in Prony series is given as: g(t)=Go(1-g1(1-EXP(-t/tau)). The parameters that must be entered in ABAQUS are g1 and tau. For Maxwell (in our case) G(t=infinity)=0.
Consequently, g1=1-G(t=infinity)/Go=1. ABAQUS requires that g1 must be less than 1. Has anyone encountered this problem?
thanks
Ah
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The true replacement
Hi Ahmad:
the true replacement is: When t=inf => g(t)=Go(1-g1(1-EXP(-t/tau))
=> g(inf)=Go(1-g1(1-0))
=> g1=1-(g(inf)/Go)
so g1 is less than 1
thanks
Yaser