【摘要】 利用形状改变比能分析了Ⅰ-Ⅱ混合型裂纹的开始角,形状改变比能断裂准则表明裂纹启裂方向与最小形状改变比能方向一致.该准则预测的Ⅰ-Ⅱ混合型裂纹开裂角和临界载荷与实验结果取得了较好的吻合.更多还原

【Abstract】 An analysis of mixed mode Ⅰ-Ⅱ crack initiation angles under different loading conditions is presented by using dilatational strain energy density criteria.The uf-criterion states that direction of crack initiation coincides with the direction of minimum dilatational energy density along the contour of constant distortional strain energy around the crack tip.The Ⅰ-Ⅱ mixed-mode crack initiation angle is predicted successfully and agrees well with experimental data.更多还原