Material property error using XFEM
Material property error using XFEM
(OP)
Hi,
I'm using Abaqus (6-11/6-12), trying to simulate crack initiation and growth on
a high temperature application with XFEM. For that reason, I want to combine a
UMAT and a UDMGINI subroutine. The UMAT alone runs fine, but as soon as my input
file contains:
*damageinitiation, criterion=USER, failuremechanisms=1
**data line**
*damageevolution, type=ENERGY
**data line**
-> the following .dat error message occurs:
***ERROR: A MATERIAL PROPERTY HAS BEEN DEFINED MORE THAN ONCE FOR THIS MATERIAL
***NOTE: DUE TO AN INPUT ERROR THE ANALYSIS PRE-PROCESSOR HAS BEEN UNABLE TO
INTERPRET SOME DATA. SUBSEQUENT ERRORS MAY BE CAUSED BY THIS OMISSION
This error occurs, no matter if I use an UMAT (*USER MATERIAL) or just a
standard steel with:
*material, Name=xxx
*elastic
**data line**
*plastic
**data line**
The only way to prevent the error, is to us a standard damage initiation
criterion like:
*damageinitiation, criterion=MAXPS
To me, it doesn't seem like there are much more things to vary in my input-file,
as the .dat file shows this error even with the least possible material
informations.
Many thanks in advance for your help and kind regards,
regler
I'm using Abaqus (6-11/6-12), trying to simulate crack initiation and growth on
a high temperature application with XFEM. For that reason, I want to combine a
UMAT and a UDMGINI subroutine. The UMAT alone runs fine, but as soon as my input
file contains:
*damageinitiation, criterion=USER, failuremechanisms=1
**data line**
*damageevolution, type=ENERGY
**data line**
-> the following .dat error message occurs:
***ERROR: A MATERIAL PROPERTY HAS BEEN DEFINED MORE THAN ONCE FOR THIS MATERIAL
***NOTE: DUE TO AN INPUT ERROR THE ANALYSIS PRE-PROCESSOR HAS BEEN UNABLE TO
INTERPRET SOME DATA. SUBSEQUENT ERRORS MAY BE CAUSED BY THIS OMISSION
This error occurs, no matter if I use an UMAT (*USER MATERIAL) or just a
standard steel with:
*material, Name=xxx
*elastic
**data line**
*plastic
**data line**
The only way to prevent the error, is to us a standard damage initiation
criterion like:
*damageinitiation, criterion=MAXPS
To me, it doesn't seem like there are much more things to vary in my input-file,
as the .dat file shows this error even with the least possible material
informations.
Many thanks in advance for your help and kind regards,
regler





RE: Material property error using XFEM
That is leading to another error in the .dat-file:
*elementoutput, elset=ASSEMBLY_ALL_EL, directions=YES
*elementoutput, elset=ASSEMBLY_ALL_EL, directions=YES
*elementoutput, elset=ASSEMBLY_ALL_EL, directions=YES
***ERROR: THE PENALTY STIFFNESS HAS TO BE PROVIDED BY USING *SURFACE
BEHAVIOR,PRESSURE-OVERCLOSURE=LINEAR OR *SURFACE BEHAVIOR,AUGMENTED
LAGRANGE WHEN USER MATERIAL IS USED FOR A CRACK PROPAGATION ANALYSIS
WITH XFEM
although my inputfile contains:
*Surface Interaction, name=INTERACTION
1.,
*SURFACE BEHAVIOR, PRESSURE-OVERCLOSURE=LINEAR
1.,
I'd greatly appreciate any advice
Thank you