三次元ハイブリッドサンプリングモアレ法による構造物の応力集中評価

概要

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In this study, a 3D hybrid sampling moiré method, which combines sampling moiré method and finite element (FE) analysis in 3D model, is developed for evaluating the stress concentration of structures. Three-dimensional displacement distribution measured by the sampling moiré method is compared with the analyzed result based on elastic FE analysis at assumptive boundary conditions. The optimum boundary conditions are determined by finding the minimum evaluation error between the displacement distributions obtained by experiment and FE analysis. Once the appropriate boundary conditions are determined, three-dimensional distribution of strain and stress, including the inner or occlusion parts, can be obtained by FE analysis for evaluation the stress concentration. The hybrid technique is useful to evaluate reliability of various actual structures in real phenomenon.