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zhaiys
@zhaiys
Trusted Member
Joined: Aug 29, 2007
Last seen: Oct 1, 2019
Topics: 1 / Replies: 82
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A bit late, but please note that there was an error in the UMAT documentation up to release 6.8 (or thereabout). Spin terms were added to the definiti...

11 years ago
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I havent used this... but, theres a Prony series viscoelastic model in ABAQUS, if I am not mistaken. You should be able to specify the shear relaxatio...

12 years ago
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Print DSTRAN and DSTRES and make sure your routine does the right thing.

12 years ago
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Youd have to use multi-point constraints. But the easiest way to do what you need to do is to write a piece of Matlab code in which you construct a re...

12 years ago
Topic
12 years ago
Replies: 2
Views: 552
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Ziguo, The strain increment is used by ABAQUS to estimate a globally stable time step. Without going into detail (mostly because I really dont know t...

12 years ago
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I *think* that F is also, in fact, in the local coordinates of the element. You should not use the 33 component of F, I think (not sure what it contai...

12 years ago
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If you want to, you could send me the UMAT. I wouldnt spread it. Write me a PM with your email address if you want. Mats

12 years ago
Topic
12 years ago
Replies: 4
Views: 1201
Topic
12 years ago
Replies: 1
Views: 728
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1) Not an expert on beams, but in general, stresses are given by the elastic strains and the elastic moduli. Take a look at Hookes law for the 3-D cas...

12 years ago
Topic
12 years ago
Replies: 8
Views: 1883
Topic
12 years ago
Replies: 4
Views: 513
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I agree! Consider the case of imposing a deformation such that I2=0. Does it seem alright to produce a negative strain energy..? Mats

12 years ago
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Be more specific. Give us a piece of your code so that we can take a look at it... M

12 years ago
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