555 等二軸荷重下における光弾性実験ハイブリット法による応力拡大係数の算定(OS24.一般セッション(9) 複合材料からハイブリッド法まで,オーガナイズドセッション)

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In this study, the photoelastic experiment hybrid method was introduced and applied to the fracture problems of the isotropic polycarbonate plate, used as structural components, with a central crack under the uniaxial or various biaxial tensile loads. And then, the influences of biaxial tensile load ratio on the stress fields and stress intensity factors near the mode-I crack-tip were investigated. As the results, the vertical tensile loads added to mode-I load (changing the biaxial tensile load ratio) had no influence on the magnitude and distribution shape of σ_y/σ_0 and τ_<xy>/σ_0, but changed the shape and slope of isochromatic fringes and the region of compressive area of σ_x/σ_0. As the biaxial load ratio (P_x/P_y) increases, the value of stress intensity factor, K_1 decreases. P_x/P_y and K_1 are negatively related. However, the changes in K_1 are smaller than the changes in P_x/P_y.
2008-11-01