Fundamental Study on Finite Strain Measurements using Image Analysis

(Progress of Local Deformation under Tensile Tests conducted by Using Specimens in Undeformed State by Shearing Deformation in Reverse Direction after Forward Direction)

Abstract

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.