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Abaqus VUMAT for hypoplastic law

Please, I’m investing about the hypoplastic model for granular materials to study the behavior of sand under a dynamic excitation. I try to use the UMAT – VUMAT interface, Interface between UMAT (Abaqus/Standard) and VUMAT (Abaqus/Explicit) from http://www.soilmodels.info/ node17.html website. Like UMAT I use the actual version on your uibk.ac.at website (umat_vec.f with consistent tangent operator and error control) for application I try the example of a triaxial test. Please any one have already use the hypoplastic model for any explicit analysis? Please any experience around the UMAT – VUMAT interface for hypoplastic model?  Best regards

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Frank Richter's picture

Subscribe to and seek assistance from the
ABAQUS mailing list
https://groups.yahoo.com/group/ABAQUS

Search the archive before posting.

For an intro to subroutines get the file
http://imechanica.org/files/Writing User Subroutines with ABAQUS.pdf

Good luck

Frank

Dear Frank,

For Abaqus mailing list; I have already asked the problem for 2 years ago (no archive)

Sorry, the problem is not 'how to write a user subroutine' but is how to use the UMAT – VUMAT interface, Interface between UMAT (Abaqus/Standard) and VUMAT (Abaqus/Explicit) from http://www.soilmodels.info/ node17.html website. (UMAT from the uibk.ac.at website ).

Thanks

Frank Richter's picture

This interface is probably quite recent. I do not recall having read anything on it in the list. Post in the mailing list. "Search the archive before posting" is part of my standard text when replying to queries like yours.

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