銅環状切欠材の繰返し応力-ひずみ応答の数値解析

概要

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Circumferentially notched cylindrical components of annealed copper were cyclically strained under diametral-displacement-controlled conditions. The localized cyclic stress-strain responses at several locations in the minimum cross section including notch roots were calculated by introducing the constitutive equation for analyzing cyclic hardening behavior, which was derived on the basis of dislocation dynamics in our earlier paper, into the finite-element method. The calculations showed that the mean stress and strain were generated on the minimum cross section under diametral-displacement-controlled conditions with displacement ratio R^D_e=-l.0, and a convex axial stress distribution produced in the first tensile stroke changed to a distribution exhibiting greater stress at the outer locatins in the minimum cross section as the cyclic hardening process progresses. Meanwhile, the axial strain and the equivalent stress and strain increased at locations farther from the center in the minimum cross section throughout the entire cyclic straining process.
一般社団法人日本機械学会の論文
1996-04-25