GS0109-382 画像解析を用いた有限歪の計測に関する基礎研究 : 引張の予変形後の大きな勢断変形で生じる局部変形の発達状況について

抄録

The purpose of this study is to investigate the development of local deformation by using the image analysis based on Natural strain theory. In our previous study, the local deformations generated under different types of deformations history, which are obtained by applying the simple shear to the reversed direction after the forward direction, have been examined. It is confirmed that the development of local deformation is almost the same if sum of the strain that is obtained by the different deformation path is the same. The developments of local deformation in each infinitesimal element on the surface of the specimens are investigated under the condition that the plastic strain on identical line elements is integrated along each deformation path. In this study, the developments of local deformation in the simple shear after applying the initial tension are examined. Then, the effect of pre-tensile deformation on the development of local deformation generated under large shear is revealed.