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at80
@at80
Active Member
Joined: Jan 3, 2008
Last seen: Oct 1, 2019
Topics: 4 / Replies: 14
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Hi, Jorgen Thanks a lot for your quick check. Radial return leads to a quicker convergence that the general method, although the latter is better t...

15 years ago
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15 years ago
Replies: 4
Views: 411
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Yes, they are accurate so that FE algorithm converges

Yes, they are accurate so that FE algorithm converges For the radial-return method, the steps and interations needed are exactly same with that built...

16 years ago
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Thanks, Jorgen.

Thanks, Jorgen. Yes, the zero matrix is not correct. But now I have a question in calculating the consistent Jacobina Matrix. I compared the consis...

16 years ago
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How to deal with the Jacobian Matrix at apex?

How to deal with the Jacobian Matrix at apex? Hi, Jorgen and all I am afraid that my convergence problem is due to Jacobian Matrix at a few integrat...

16 years ago
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Thanks, Jorgen. Ill double check my subroutine.

16 years ago
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I conform my problem is due to poor DDSDDE

I conform my problem is due to poor DDSDDE Hi, Dr. Jorgen I havent yet solved my problem sucessfully. However, I tried vumat in impleting D-P model...

16 years ago
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1) I believe the stress is in the local coordindate system ------------------------------------------------------------- Yes, I agree you. Moreover, t...

16 years ago
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thanks a lot, Jorgen

thanks a lot, Jorgen concentrating on VUMAT, I still have several questions: (1) In VUMAT, which stress, rotated (or corotated) Cauchy stress Sigma(...

16 years ago
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Hi, Jorgen

Hi, Jorgen Thanks for your kind reply. For (2), I did a simulation using built-in constitutive model, the maximum shear strains can be more than 50%...

16 years ago
Topic
16 years ago
Replies: 16
Views: 1770
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Hi, Jorgen

Hi, Jorgen I doubt something not correct in the updating of Jacobian matrix. I found a big surprise. For the simple loading condition such as trixial...

16 years ago
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Thanks for the kind suggestion

Thanks for the kind suggestion Hi, Jorgen, thanks for your kind suggestion. Frankly, I am doing what you suggested. I used MATLAB to help check the...

16 years ago
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