U形三重環状切欠き丸棒試験片のひずみ分布

概要

論文の詳細を見る
Plastic strain distributions in large deformation were obtained at the net section of the central notch of cylindrical specimens with three identical circumferential U-notches spaced longitudinally with an equal spacing. These strain distributions were numerically calculated from the distributions of the hardness number at the net section. Each specimen was loaded up to P_<max> (maximum tensile load) and beyond P_<max>. In the central notch of the notched specimens subjected to strong effect of notch interference, the axial strain at the center of the net section was greater than that at the notch root and was maximum in the net section. The shape of plastic region in the longitudinal section was an X -shape, which is formed by connecting diagonally two notch roots situated on both sides of the central notch. This shape of plastic deformation remained as the principal plastic deformation up to P_<max>, although it became weak with increasing deformation. Beyond P_<max>, plastic deformation occurred mainly in the vicinity of the net section of the central notch, causing unstable deformation.
社団法人日本材料学会の論文
1992-09-15