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Nils Von Nostrand
08-29-2003, 06:28 AM
Greetings,

My name is Ashok, and I am a PostDoc at Washington
University in St. Louis. We are studying embryonic
heart development. We use ABAQUS as our finite element
program.

I would like to know if anyone has written an user
subroutine UMAT for nonlinear viscoelastic behavior
(e.g. using a Prony series). If, yes, I would like to
know how you wrote it. The manual is fuzzy at best.

We cannot use the built in viscoelastic option
becuase:

1. It is limited to Isotropic materials.
2. We need to write an UMAT in order to incorporate
growth.

Thank you for your time.

Ashok

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