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soft polypropylene

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Posts: 2
Topic starter
(@Mercuzio)
New Member
Joined: 17 years ago

Dear Dr. Bergstrom,

Would you please let me know which material model (UMAT) is suitable for simulation of soft polypropylene include fracture and unloading effect in LS-DYNA?

Best Regards

Hamid

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Posts: 3998
(@jorgen)
Member
Joined: 5 years ago

Are you interested in using one of the builtin material models in LS-DYNA or one of the UMAT subroutines that I have developed? Of my subroutines, the [URL= http://usermaterial.polymerfem.com/ ]PNM[/URL] is an excellent candidate.

- Jorgen

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Posts: 2
Topic starter
(@Mercuzio)
New Member
Joined: 17 years ago

Thank you very much for your replication.

Where I can find more information about PNM and which test should be carry out to make input file?

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Posts: 3998
(@jorgen)
Member
Joined: 5 years ago

A brief summary is presented on the page that I [URL= http://usermaterial.polymerfem.com/ ]linked to[/URL].

I recommend that you perform uniaxial tension experiments at different strain rates and temperatures. I would perform both loading and unloading at a few different strain values as well.

- Jorgen

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