i m trying to do thermal analysis of rapid manufacturing process called LENS in abaqus(64-bit). Based on thermal results(thermal odb), i m doing a stress analysis. In order to complete a 90 step analysis along with DFLUX subroutine using quadritic (DC3D20) elements (approx 30000 elements), it takes nearly 30 hours(intel core i-7 processor and 6Gb of RAM) and more than 7 days to complete stress analysis. 13-14% of the CPU usage is observed duing stress analysis. is there any way to enhance the performance?? because its using only 13% of CPU though i have 7 processors.
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Specifying my own failure criteria
Hello all,
I am working on modelling a simple concrete structure(like cube or cylinder) in ABAQUS and I want to feed in my own failure criterion( say maximum shear or normal stress failure limit rather than the compressive strength). Thus, I was told that I need to write a Umat file for that. Could anybody elaborate on this and possible contribute into how this could be done in ABAQUS?
YOu help is very much appreciated
Hussam Nasreddin