硬さ試験によって環状切欠丸棒試験片のひずみ分布を求める方法について

概要

論文の詳細を見る
Plastic strain distributions on the net section of circumferentially notched cylindrical specimens are obtained using the Vickers microhardness test and numerical calculation. Notched specimens were loaded up to 0.7 P_<max> (P_<max> : maximum tensile load), 0.8P_<max>, 0.9P_<max>, 0.95P_<max>, P_<max>, 0.98P_<max> beyond P_<max> and 0.95P_<max> beyond P_<max>. Strains at a point were calculated by making an assumed curve of radial displacement touch at that point to the real curve of radial displacement distribution obtained from the hardness number distribution. The distributions of the equivalent and axial plastic strains are concave at all load levels tested. The equivalent plastic strain is a little greater than the axial plastic strain. The magnitude of the equivalent and axial plastic strains at the notch root at P_<max> is about twice as large as the axial plastic strain at P_<max> of unnotched specimen.
一般社団法人日本機械学会の論文
1991-02-25