【摘要】 采用Ｄｕｇｄａｌｅ－Ｂａｒｅｎｂｌａｔｔ模型分析了压缩载荷对疲劳裂纹闭合的影响。在裂纹张开载荷和闭合载荷的确定过程中运用了解析函数形式的奇异积分方程理论。分析和相应的数值计算表明：（１）压缩应力对疲劳裂纹闭合的影响程度取决于压缩应力幅值与材料屈服应力之比；（２）在疲劳裂纹扩展分析中考虑压缩应力的影响是必要的。更多还原

【Abstract】 A Dugdale-Barenblatt model is used to examine the influence of compressive stresses on fatigue crack closure. Complex function formulation is employed to calculate opening and contact loads.It is shown that the influence of compressive stresses on fatigue crack closure is significant when externally applied compressive stresses are comparable with the yield stress of the material.更多还原