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Hi Mechanicians,

 I have written a UMAT for single crystal plasticity analysis but it is not running properly. I want to debug it. Is there anyway to do that with Abaqus? In order to debug it in a Microsoft VC++ environment I decided to write a main program for the UMAT subroutine. Does this approach seem valid? Also what type of variables should be passed into the UMAT subroutine from the Main program?  

Any help would be appreciated.

Thank you

Nitin

Position filled

Hi!!

I'm still new in the concept of fluids. Please help!! I need a good book which explains navier-stokes equations.

Hello,

I am a Mechanical Engineer with a Masters from Indian Institute of Science Bangalore. I have been working in various fields of Mechanical Engineering: Product development of forging components and in software development of hyper-elastic finite element software development.

Hi everybody

I'm babak, and work with Abaqus.

that's so good too be up to date with Abaqus.

Regards.

I am carrying out spring back analysis using LS-dyna and hyperform. The procedure as follows: forming is carried  using LS-dyna and then the spring back  is included in to the result file using hyperform and .k files are created using hyperform itself. While running the analysis, after certain number of iterations, the analysis aborts with message equilibrium can’t be achieved.  I have included the both the input files (with and without spring back).

Please point out what could be the mistakes inthe input file and advice me for any additional inputs.

can any one tell me regarding how to neglect stresses at constraint loacations?

Thanks...