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Material model for high cycle fatigue
Wed, 2008-12-10 19:26 - Chali Alindunesiy
In fatigue analysis, it is common to use S-N curve from database for spesific material, and some time for spesific way of loading. Is there any way to predict fatigue from direct simulation? For example, giving cyclic loading (10^5 times) and the material will suffer damage and eventually failed. In some FEM codes (MARC, LSDYNA, etc) there is Lemaitre-Chaboche model used to analyze material behavior under low cycle cyclic loading.
Thanks in advance
Chali
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Re: Material model for high cycle fatigue
Dear Chali,
Look at the discussion on http://imechanica.org/node/3694. It is a bit lengthy, but the answer is yes, you can do it, but usually you need to use some specific fatigue solver, which serve as a post-processor of FEA. There are some nuclei of fatigue solvers in common FEA packages as it is e.g. in Ansys, or in the free FEA solver Code Aster, but I do not know very much about them. You can test my own PragTic fatigue solver, which is also freeware or to buy some commercial fatigue solver (look on www.pragtic.com/links.php).
Good luck in your search
Regards,
Jan
It's a matter of how you link your material fatigue baseline
Xiao-Yan Gong, PhD