有限要素法による異種接合材の弾塑性解析

概要

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In order to examine the effects of plastic deformation on the stress fields near the bonding edge, an elastic-plastic finite-element analysis was performed on a bimaterial plate. The materials above and below the interface were assumed to be different from each other in Young's modulus and/or yield stress. The plate was subjected to a prescribed uniform axial displacement along the upper boundary. Computation has been performed for various combinations of the material constants, and the following results were obtained. ( 1 )Development of the plastic region is affected not only by the yield stress but also by the elastic modulus. ( 2 )Stress concentration of tensile stress at the edge disappears as yield region extends. ( 3 ) Stress concentration of shear stress at the edge is expressed by |γ|=Kr^<-λ> under general yielding, and the value of λ takes a constant (λ_p) for a wide range of the deformation stage. ( 4 )The value of λ_p is affected by the ratio of Young's moduli when the ratio of the yield stresses is small.
一般社団法人日本機械学会の論文
1992-06-25