光弾性画像データを対象とした新しい輪郭構成法

概要

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When performing computer-aided stress analysis using photoelastic image data, difficulty in accuate extraction of the boundary contour of the specimen and the image data near the boundary is often experienced since there exist many kinds of unavoidable noise due to the fluctuation of the source light intensity, the resolution of optical equipments and the characteristics of interference phenomena. It is, however, essential to determine the boundary contour of the specimen and the image data on and near the boundaries, because of the requirement for solving boundary value problems regarding the equilibrium equations of stresses. Accordingly, it is desirable to develop an efficient method for construction of approximate contour and boundary values preserving the feature of the specimen boundary. In thi paper, the authors discuss a new plane-spline function method for automatic construction of the specimen boundary, where an algebraic plane curve is fitted to each set of measured points which corresponds to respective ramification, after considering the boundary as a simple arc and dividing it into finite ramifications.
社団法人日本機械学会の論文
1993-03-25