Fatigue

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

For fatigue life estimation (HCF & LCF), I am not sure which stress shall I consider i.e. max. principal stress or von Mises stress & what should be the criteria for selection of the same? Shall we be driven by material model (i.e. ductile or brittle) or mode of failure or some thing else?

The 7th International Conference on Fatigue Damage of Structural Materials will be held in Hyannis, Mass., USA, 14-19 September. Hyannis is situated 80 mi/130 km from Boston's Logan International Airport and is easily reached either by car or by public transport.

The full oral and poster programs, as well as registration details can be found on the conference website at www.fatiguedamage.elsevier.com

http://dx.doi.org/10.1016/j.ijfatigue.2008.03.004