Finite Element Simulation of Complex Thermomechanical Fatigue Evolution

Abstract:

Fatigue failures occur due to the application of fluctuating stresses that are much lower than the stress required to cause failure during a single application of stress. The process is dangerous because a single application of the load would not produce any ill effects, and a conventional stress analysis might lead to assumption of safety that does not exist. The fatigue process is thought to begin at an internal or surface flaw here the stresses are concentrated, and consists initially of shear flow along slip planes. The mechanisms of fatigue-crack propagation are examined with particular emphasis on the similarities and differences between cyclic crack growth in ductile materials, such as metals, and corresponding behavior in brittle materials, such as intermetallic and ceramics. Fatigue, as understood by materials technologists, is a process in which damage accumulates due to the repetitive application of leads that may be well below the yield point.

• Periodical: Materials Science Forum (Volume 883)
• Pages: 32-36
• DOI: https://doi.org/10.4028/www.scientific.net/MSF.883.32
• Online since: January 2017
• Authors: Abdelouahid El Amri*, M. El Yakhloufi Haddou, Abdelaltif Khamlichi
• Keywords: Damage, Fatigue Thermomechanical, Finite Element Analysis, Fracture, Manufacturing

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