Reply To: tensile test of hyperelastic material (instability after 200 percent strain)

[Pedram Samadian]

Hi Wasif,

Why is stress nonzero for zero strain in the experimental data? You can find some tips below to improve your model predictions:

• Use a finer and higher-quality mesh in regions of high deformation to avoid numerical instability.
• Consider using fully integrated elements (type #16 shell with a hourglass type #8) to reduce numerical instability at large strains. 
• Reduce mass scaling if applicable to maintain stability without affecting results.

I hope this information helps.

Thanks,

Pedram