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When and where the stress objective rates are used in ABAQUS software?

Submitted by Shunlai.Zang on Thu, 2008-11-27 08:52.

Hi everyone,

    I have a question about the objectivity tensor in ABAQUS software. Below is my question.   


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What are the differences between increment strain defined by dstran and dfgrd0,dfgrd1 in abaqus?

Submitted by Shunlai.Zang on Wed, 2008-11-19 08:00.

Hi everyone,

   I am used to use 'dstran, stran, drot...' to develop my user subroutine UMAT and VUMAT codes in Abaqus. But recently I read some publications in which they use dfgrd0, dfgrd1 and dtime to develop their codes. I want to know what are the differences between these two ways?

   Thank you very much!

 Shunlai


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What are the differences between "strain hardening" and "work hardening"?

Submitted by Shunlai.Zang on Mon, 2008-09-22 06:18.

I think the concepts from the constitutive theory, but in many papers the researchers seem that they dont differentiate them.  So could you give me an exact explanation about it?  Thank you.


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