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Great points. Is Poisson's ratio in the non-linear regime essential for FEA modeling of non-linear viscoelasticity? You mentioned that cyclic loading can make things tricky. I am using Large Amplitude Oscillatory Strains (LAOS) from a rheometer.
I would not focus on the Poisson's ratio in that case. The Poisson's ratio is mainly used because it is easier to measure/guess than the bulk modulus.
Great points. Is Poisson's ratio in the non-linear regime essential for FEA modeling of non-linear viscoelasticity? You mentioned that cyclic loading can make things tricky. I am using Large Amplitude Oscillatory Strains (LAOS) from a rheometer.
I would not focus on the Poisson's ratio in that case. The Poisson's ratio is mainly used because it is easier to measure/guess than the bulk modulus.