Abstract
The method of finite strain measurement based on the image analysis is suggested by using the Natural Strain theory. The effectiveness of this measurement method has been verified by comparing the strain measurement by the image analysis with the conventional measurement based on the displacement meter. However, the verification of strain measurement has been done under the uniform deformation field. Hence, the verification under the local deformation that arises after the uniform deformation has not been examined yet in those studies. Therefore, as the most fundamental case, the measurements under local deformation for uni-axial tension or simple shear were conducted in the previous report. As a result, it became clear that the measurements on upper position of the specimen differ from the measurements on middle position in case of uni-axial tension, but, in case of simple shear, these measurements were not so different from. In this paper, the progress of local deformation is examined by changing the loading history of these deformations. Especially, the local deformation that is generated under shear deformation after applying the tension is examined by changing the magnitude of the tension.
