ストークスパラメータ測定による光弾性非破壊自動測定法の研究I. 回転する2次主応力の差と方向の数値シミュレーション

抄録

A clue to a photoelastic computer-aided tomography similar to the x-ray CT is investigated. The study deals with an automatic and nondestructive method of measuring the differences of rotating secondary principal stresses and their directions in a three dimensional model subjected to an arbitrary stress distribution. The method takes two steps as follows. One is to measure the Stokes parameters of the light beam emergent from the model. The other is to slice the model optically by using the scattered light caused by an incident beam. The former gives great facility for an automatic measurement, and the latter is very useful for a nondestructive measurement. The paper I proposes an automatic and nondestructive method of evaluating the differences of rotaing secondary principal stresses and their directions in three dimensional photoelasticity. The algorism of the method is numerically examined by using a known. theoretical stress distrbution having the rotation effect. The stress distribution along a diameter of a cylindrical bar submitted to tension and torsion is used as an example. The algorism is successful in the examination.