Learning Forum

[tarek.azzouni0]

Dear community, 

Is it possible to simulate a pre-strained material directly without any pre-simulation? We have conducted uniaxial prestraining on a material and would now like to run another simulation.

I have the major and minor strains from our previous operation. 

Best regards 

 

[peteroznewman]

I noticed that you posted in the LS-Dyna channel. I don’t know how to do this in LS-Dyna, but I can tell you how to do it in the Ansys Mechanical Solver.

The APDL command INISTATE allows you to assign an initial state of strain (or stress) on elements in the model that will be present when the solver starts.

https://ansyshelp.ansys.com/public/account/secured?returnurl=/Views/Secured/corp/v261/en/ans_cmd/Hlp_C_INISTATE.html

https://www.scribd.com/document/358667908/InitialState-Exemplo

Mapping Stresses When Using Ansys Mechanical APDL

https://www.youtube.com/watch?v=14kXIZrfM3E

[tarek.azzouni0]

Unfortunately, we use LS-Dyna in our project, but thanks a lot for your help. 

[Armin]

Hello Tarek,

Please check the *INITIAL_STRESS and *INITIAL_STRAIN cards, along with their respective options, in the LS-DYNA Keywords Manual: LS-DYNA Keyword Manual