损伤容限型TC4-DT合金疲劳裂纹扩展速率的数学描述

Mathematical Description on Fatigue Crack Growth Rate of the Damage-Tolerance TC4-DT Alloy

摘要:

测试了损伤容限型TC4-DT合金的裂纹扩展速率。通过数据分析和线性或非线性拟合得到了3种疲劳裂纹扩展速率的数学描述公式。通过对描述结果的误差分析，得到了描述板材疲劳裂纹扩展速率的理想描述公式。

Abstract:

Fatigue crack growth rate(FCGR) of the damage-tolerance TC4-DT alloy with the thickness of 30 mm was tested by MTS-810 low cycle fatigue machine.Three mathematical description formulas of FCGR were obtained by data analysis and linear fit or nonlinear.Finally,the optimal description formula was found by error analysis of mathematical description result.