Stochastic Simulation of Initiation and Early Growth of Small Cracks in Creep-Fatigue
The creep-fatigue failure of polycrystalline steels and alloys is caused by multiple intergranular cracks which begin to initiate from the early stage of life. The initiation and the growth of small cracks show random behavior due to the local inhomogeneity of materials. In order to investigate the mechanics hidden behind the stochastic nature, a method of inverse analysis based on a numerical simulation is proposed. As a result, the characteristics of the failure process is successfully drawn out in terms of the cracking behavior by the analyses.
Keywordscreep-fatigue small cracks crack initiation crack growth numerical simulation
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