画像解析を用いた有限歪の計測に関する基礎研究

（順方向後に逆方向の剪断の予変形を与えて無変形状態となった試験片を用いて行われた引張試験下の局部変形の発達状況について）

抄録

This paper describes the progress of the local deformation generated under large deformation, which is measured by using the image analysis based on the Natural strain theory. In our previous studies, the experiments of local deformations, i.e., the simple shear to the reversed direction after the forward direction, have been conducted. And as the results, it has been confirmed that the progress of the local deformation is almost the same if the sums of the strain is the same value even if the deformation path is different. In the present study, the developments of local deformation are examined under the uniaxial tension by using the specimen which is preliminarily applied the simple shear in the reversed direction after forward direction. Then, the effect of the pre-deformation of simple shear on the developments of local deformation generated under large uniaxial tension is revealed by changing the value of the pre-deformation of simple shear.