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user subroutines

FINITE ELEMENT WEAR SIMULATION

hi all,

        i am very new to abaqus and i want to simualte sliding wear between a pin and a disc. i found from the literature that by using user subroutines we can calculate the wear. i am not getting how to use a user subroutine , can any one expain how to use user subroutines in the CAE. is there any simple example problems in understanding this user subroutine functions. thanks in advance. 

Question for post-processing after each increment and return it back to calculation (non-local damage)

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Dear everyone:

  I am trying to use a nonlocal damage criteria to simulate the crack growth, which can reduce the mesh dependency.

User subroutine in fortran 90 for abaqus

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Hi Abaqus experts

I am hoping that you can help me getting a element user subroutine writen in fortran f90 to work in Abaqus. I have made the simplest 8 noded brick element element that i can think of. I has a zero thickness and only has some simple definitions of the parameters ESTIFF,RHS,SVARS and PNEWDT. I have made a model with one single element of this user element where the upper part is displaced from the lower part which are fixed.

When I try to run the model I get the following message in the log file:

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