WU QiaoGuo, CHEN XueDong, FAN ZhiChao, et al. IMPROVED FORMULA FOR FATIGUE CRACK GROWTH RATEUNDER DIFFERENT STRESS RATIO[J]. 2017,39(1):160-165. DOI: 10.16579/j.issn.1001.9669.2017.01.027.
An improved formula for fatigue crack growth rate in mode I,mode III and mixed mode I-III under different stress ratio R was proposed,which was based on J-integral range ΔJ. In the formula,the test data under different R could be normalized by correction factor M,which changed the test ΔJ under different R to ΔJeq0under R = 0,and the relationship of M and R was obtained empirically. The proposed formula was validated with available experimental fatigue crack growth data in mode I,mode III and mixed mode I-III under different stress ratio from literatures. It transpires that these test data can be well described with the present formula.
关键词
疲劳裂纹扩展速率J积分Ⅰ、Ⅲ、Ⅰ-Ⅲ型应力比改进公式
Keywords
Fatigue crack growth rateJ-integralMode ⅠⅢ and Ⅰ-ⅢStress ratioImproved formula