疲劳裂纹扩展速率测试及表征的一点讨论  

SOME DISCUSSIONS ON THE MEASUREMENT AND EXPRESSION OF FATIGUE CRACK GROWTH RATE

作　　者：王日清[1] 刘庭辉[2] 成沛祥[2] 

机构地区：[1]沈阳重型机器有限责任公司,沈阳110025 [2]湘潭钢铁集团有限公司,湘潭411101

出　　处：《机械强度》2003年第6期687-689,共3页Journal of Mechanical Strength

摘　　要：在没有分析真实应力—应变状态并得到证实的情况下 ,文献 [1,2 ]认为在所拟合得到的折线裂纹扩展速率中 ,第 1阶段的直线属于平面应变区 ,第 2阶段的直线属于平面应力区 ,这一观点值得商榷。Some discussions are made on the statements and conclusions of references [1, 2] about fatigue crack growth rate. Based on the observation that the experimental data of crack growth rate can be fitted by a bi-linear function in the logarithmic plots of da/dN against ΔK, the authors of references [1,2] stated that the first liner part of the curve represents the crack growth rate in a plane strain state and the second linear part a plane stress state. There is no argument for this conclusion.

关 键 词：疲劳裂纹扩展速率 测试 表征 Paris方程 平面应变 平面应力 

分 类 号：O346.2[理学—固体力学]