Development of Non-Contact Evaluation Method for Impact Load Using C.G.S. Method

Abstract

From a design point of view, external force value applied to structures knowing closely is one of very important problems. Measurement of Impact Load frequently uses the strain gauge, but there are cases that correct evaluation is difficult because of diffusing stress wave in strikers or targeting at transient phenomena. In these cases the mean evaluating its value based on mechanical information in specimens is valid. In this paper, we focused attention on Coherent Gradient Sensing (C.G.S.) fringe patterns near loading point when using C.G.S. method, developed the measuring method of load value by C.G.S. method and considered its adequacy.