Reply To: How to apply a stress as an initial load state ?

[marie-charlotte.picard]

If I'm sure that the inistate, write command writes the stress of the 1st simulation in the last step, then yes, it's a convergence problem because the inistate, read command applies stress that are too strong on the first substep of the 2nd simulation.

I tried your method: in the 2nd simulation, I applied a pre-stress as loaded with inistate, read and then locked all nodes in displacement in the first step. In the 2nd step, I used the command DDELE,all,all,,,FORCE to unlock the nodes, then esel,s,,,locked_nodes d,all,all,0 allsel to relock the fixed nodes from the 1st simulation. The result converged, but the displacement result was not the same between the 1st and 2nd simulations in the last iterations. 

For the 1st simulation, I have a maximum stress of 0.001464Pa, whereas for the second I'm at 0.25e-3Pa, which is much smaller.

Any help would be appreciated to get the same results between the 2 simulations. Thanks.