Abstract

Mixed-mode fatigue crack growth in biaxially stretched sheets is investigated. The modified fracture criterion proposed by Wang and Du is extended to the case of cyclic loading to predict the mixed-mode fatigue crack growth. The analysis of the mixed-mode fatigue crack growth process is very complex. Software developed recently by the authors can be used to more precisely predict the mixed-mode fatigue crack growth process. The software in which the fatigue crack growth criterion presented here is combined with the displacement discontinuity method, a boundary element method, is described in detail from a number of aspects. The analysis of the fatigue growth process of an inclined crack in biaxially stretched sheets is performed.

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