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This site is an independent forum for discussing constitutive models for polymers and their implementation in general purpose finite element programs. What you will find here are general information about material behavior, useful constitutive models, and numerical implementations. The goal of this site is to become a useful reference for constitutive models for polymers. Researchers and users are encouraged to submit results and to request information.
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Polymer FE Modeling Training Class - Fall 2008 |
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2008-08-05 - by Jorgen
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Do you perform FEA of polymer components but don't know the tradeoffs, pitfalls, and benefits of different constitutive models, modeling options, and material test methods?
Do you want to get a competitive advantage by using more advanced and accurate FEA techniques?
Then attend the two-day training seminar that I will be giving in San Francisco, November... [Read More]
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0 Replies | 350 Views
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how can use Vumat to simulate the ductile fracture criterion of Oyane |
2008-06-08 - by ductoan_bkct@yahoo.com
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Dear Dr. Jorgen Bergstrom and everybody
I have just studied Abaqus and would like to use Vumat to simulate the ductile fracture criterion of Oyane which have the equation: I=(1/b)*integral(0-fracture strain) of (mean stress/Smises stress + a)*d(strain), where a, b is testing parameters. The fracture will be appear when I reach 1 unit.
Could you please show me how to write algorithm to calculate (I) and out put (I) in Vumat.
thanks you so much
... [Read More]
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5 Replies | 801 Views
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Howto Install ABAQUS on Ubuntu 8.04 (including support for UMAT subroutines) |
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2008-04-24 - by Jorgen
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If you are running the finite element program Abaqus you might be interested in learning that it is not too difficult to install it on the latest version of Ubuntu Linux 8.04. There are probably different ways to install Abaqus so that you can run any computer simulation, including user-material models (UMAT and VUMAT) subroutines.
Here are the steps that I took to install the Abaqus v6.7-EF on a i386 computer running Ubuntu 8.04:
1. Copy all files from the... [Read More]
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11 Replies | 1,921 Views
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 Dynamic Loading Elastomers - Constitutive Modeling Review |
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2008-04-24 - by Jorgen
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I will be giving a presentation about how to perform accurate finite element simulations of the dynamic loading response of elastomers and rubbers at the upcoming 2008 Abaqus Users' Conference. My presentation will review how different constitutive models such as hyperelasticity (neo-Hookean), linear viscoelasticity, and the Bergstrom-Boyce model, can predict the storage modulus E' and the loss modulus E" as a... [Read More]
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0 Replies | 685 Views
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Polymer Modeling Training Class - April 2008 |
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2008-02-08 - by Jorgen
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Do you perform FEA of polymer components but don't know the tradeoffs, pitfalls, and benefits of different constitutive models, modeling options, and material test methods?
Do you want to get a competitive advantage by using more advanced and accurate FEA techniques?
Then attend the two-day training seminar that I will be giving in Boston April 7 and 8, 2007. See the following ... [Read More]
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1 Reply | 909 Views
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PolymerFEM.com - Constitutive Models and Polymer User Materials
