Image analysis of photoelastic fringes (1st report, A method for determination of fringe orders and directions of principal stress in the whole region of a 2-dimensional model by image processing)

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  • 光弾性画像解析　Ｉ　　二次元モデル全域のしま次数および主応力方向の画像処理的決定方法
  • コウ ダンセイ ガゾウ カイセキ 1 2ジゲン モデル ゼンイキ ノ

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Abstract

This paper describes a method for the determination of fringe orders and directions of principal stress in the whole region of a 2-dimensional photoelastic model by image processing. The fringes (isochromatics, isoclinics) are extracted as points where the first derivative of the density distribution is zero. The determination of fringe orders or directions of principal stress between extracted fringes uses the values and pattern of extracted fringes. The results determined can be put out as a shaded image to monitor TV, and be utilized effectively to stress analysis by the finite element method, etc.

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