We are trying to simulate a flexible membrane(hyperelastic meterial) response under water pressure. In the simulation, The membrane need to be pre-stretched, then accept load. I did following tests
- Applying initial stress using *initial condition card. It worked well with linear elastic model. For hyperelastic material, it doesn’t work.
2.I tried 2step simulation. First stretch the membrane in ccx in step 1.
Then I use *restart card for my second step, coupling with openfoam to receive loads. The mesh used by openfoam is obtained by recording the final deformation in step 1. There’s no errors during mapping mesh nodes. However, the fluid field doesn’t converge at second time step.
Does anyone tried such problems and share your experience? Any comments will be appreciated.
Thanks in advance!