光弾性等色線縞画像の構造依存型全域解析法

抄録

This paper describes a generalization method and the ability to determine the isochromatic fringe order more accurately over the entire region of a 2-dimensional photoelastic model. The isocromatic fringes measured under various conditions were automatically extracted as the extreme points of "smoothing spline functions" using a microcomputer. By utilizing the well-known formula for the light intensity of a beam, the accurate fringe order, which varies continuously between the adjacent fringes, was automatically determined. Then by applying the concept of multidimensional unfolding, the specific fringe order distribution obtained was successfully adjusted and generalized, taking the variation of test conditions into consideration. The values of the principal stress difference computed numerically by this method were compared with theoretical values and a close similarity was observed.