Host: The Japan Society of Mechanical Engineers
Name : [in Japanese]
Date : October 08, 2016 - October 10, 2016
Non-uniform strain distribution was measured and the effect of a crack on the distribution was investigated on fatigue specimens with a repair weld portion. The strain distribution in the initial loading showed that an elastic deformation mainly occurred in the welded portion while a large plastic deformation occurred in the base material. This behavior was reproduced qualitatively by the finite element analysis where the materials properties on the basis of the strain measurement were applied. The length of the region where a crack affected the strain distribution was defined on the basis of the strain between two facets across a crack. It was confirmed that the length corresponded to the crack length on the painted surface that was read from the images taken.
