画像処理による光弾性縞の増倍と抽出

概要

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Methods are proposed for multiplying the original fringes obtained from a photoelastic experiment and extracting the fringes using the original-or multiplied-fringe image. The multiplication method is based on the trigonometric identity of the double and triple relations of the sine and cosine functions. The extraction method utilizes two image obtained in dark-and light-field circular polariscope. In order to investigate the accuracy of the measurement, a computer simulation is used for the theoretical fringes in a circular disk subjected to a concentrated. Continuous photoelastic fringes near the crack tip are accurately extracted. This method is applied to an epoxy resin plate with a crack at one side 3-point bending and the stress intensity factor is calculated. The stress intensity factor is obtained accurately using multiplied fringes.
一般社団法人日本機械学会の論文
1998-06-25