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Inclusions often become the cause of stress concentration and failures. As there are many cases in which high stress arises around an inclusion and causes cracks and exfoliations from the matrix leading to a fracture, it is important to analyze the deformation behaviors around the inclusion. Although there have been many researches through theoretical analysis, research examples of inclusions through experimental analysis are very few. The analyses on the elliptic inclusions at a tensile load were conducted in this study. Polycaibonate was used as a test specimen model, and three different kinds of materials, epoxy resin, PMMA and polyethylene, were used as elliptic inclusions; 39 specimens were prepared in total. The experiment was conducted by the photoelastic method, method of caustics and finite element method. As a result of this experiment, the experimental equations relating to the principal stress difference, equivalent stress and stress intensity factor in the matrixes around the elliptic inclusions were obtained.
日本実験力学会の論文