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Weird behavior of VUMAT subroutine

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Posts: 6
Topic starter
(@bhulele)
Active Member
Joined: 7 years ago

Dear All,

I wrote a VUMAT for GTN. it worked fine but when U changed an equation the results are unacceptable and in many trials zero.

I have a line

ftot = 1-exp(fn*dfgrow**three)

when I change that to

ftot = 1-exp(fn*dfgrow)

i get the results

ftot = fn*dfgrow

i get the result but for the first line I dont.

This has occurred to me previously but somehow that worked.

Has anyone had this kind of problem before.

Please help.

Tresca

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