Re: UMAT does not work under tensile displacement for Microscale RVE analysis

"'Doc. Dr. Emin Sunbuloglu' [email protected] [Abaqus]" <[email protected]>
Newsgroups gmane.comp.mathematics.abaqus.user
Message-ID <[email protected]>
Looks like an ınstabılıty problem?

Have you checked the values of DSigma/DEps (individually for fibers, matrix and compound forms)?

Should help.

What is the error/failure?

Do you use implicit (standard) solver?

****************************
Dr. Emin SUNBULOGLU
Assoc. Prof.
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From: [email protected]

Sent: October 2, 2018 16:05

To: [email protected]

Reply-to: [email protected]

Subject: [Abaqus] UMAT does not work under tensile displacement for Microscale RVE analysis

Dear all,

I have a problem in my microscale model which is 2d-hexagonal with

fiber/polymer components.In UMAT, I have used Eindhoven glassy polymer(EGP)

behavior for polymer and Abaqus calculates fiber elastically itself. My code

works under compression displacement while it does not work in tensile

displacement( since it is 2d, both displacements are transverse). In

compression, it also does not work even for compression after intrinsic

softening behavior of polymer starts.I could not figure out the reasons,

indeed the problem in the code.

If anybody faced with that kind of problem and if you shared with me, I

would be glad a lot.

Senem

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Sent from: http://abaqus-users.1086179.n5.nabble.com/

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Posted by: "Doc. Dr. Emin Sunbuloglu" <[email protected]>
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