確率論的損傷累積モデルに基づくMode I疲労き裂の伝ぱ機構

概要

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The mechanism of mode I fatigue crack propagation that the crack propagation consists of the initiation of the cleavage mode crack and the opening of it is proposed by the use of renewal stochastic damage accumulation model for crack propagation, in which the parameters are explained based on the dislocation density and the elastic energy of dislocation. The calculated results of ΔK_<eff> for da/dn agree with the experimental ones. ΔK_<effth> is calculated under the condition that the energy of cleavage crack initiation is equal to the one given from the outside. The plastic zone size is calculated in consideration with the number of dislocation on the each slip line contained in it.
一般社団法人日本機械学会の論文
2003-11-25