静止平面应力裂纹尖端的理想塑性应力场
来源期刊:中南大学学报(自然科学版)1985年第4期
论文作者:林拜松
文章页码:61 - 65
关键词:塑性应力场; 裂纹尖端; 平面应力; 解析表达式; 屈服条件; 理想塑性; 应力裂纹; 应力分量; 平衡方程; 复合型裂纹
摘 要:在裂纹尖端的各理想塑性应力分量都只是θ的函数的条件下,利用平衡方程和Tresca屈服条件,导出了平面应力裂纹尖端的理想塑性应力场的一般解析表达式。将这些一般解析表达式用于具体裂纹,就得到Ⅰ型裂纹、Ⅱ型裂纹及Ⅰ-Ⅱ复合型裂纹尖端的理想塑性应力场的解析表达式。
Abstract: Under the condition that all the perfectly plastic stress components ata crack tip are the functions of θ only, making use of the Tresca yieldcondition and equilibrium equations, we derive the generally analyticalexpressions of the perfectly plastic stress field at a plane-stress crack tip.Applying these generally analytical expressions to the concrete cracks, theanalytical expressions of perfectly plastic stress fields at the tips of modeⅠ,mode Ⅱ and mixed mode Ⅰ-Ⅱ cracks are obtained.