接合界面における弾塑性応力特異性

概要

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In the present study, the plastic singularity for problems of a crack meeting and normal to an interface and of a corner of bonded two 90°-wedges. A practical method is introduced to solve homogeneous differential equations obtained in the analysis. Except of the hardening exponent n, the relative resistance of two materials to plastic deformation can be represented by a parameter Δ defind as Δ=(α_1/α_2) (E_2/E_1) (σ_<02>/σ_<01>)^<n-1>. For cases of two bonded materials having the same n, it is found that the singularity values s for the problem of a crack meeting and normal to an interface are restricted in a range of 2>s>s^*, where s^* are values for a single 90°-wedge with free-clamped edges, and the values s for the problem of a corner of bonded two 90°-wedges are restricted in a range of s^*>s>2-1/n. For cases of two bonded materials having the different n. it is found that the order of singularity depends only on the hardening exponent n of the material with smaller n.
一般社団法人日本機械学会の論文
1999-05-25