二軸荷重下における光弾性ハイブリッド法による応力拡大係数の算定
2007 年 73 巻 726 号 p. 272-278
詳細
2007 年 73 巻 726 号 p. 272-278
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 σy/σ0 and τxy/σ0, but changed the shape and slope of isochromatic fringes and the region of compressive area of σx/σ0. As the biaxial load ratio (Px/Py) increases, the value of stress intensity factor, K1 decreases. Px/Py and K1 are negatively related. However, the changes in K1 are smaller than the changes in Px/Py.
