含裂纹结构剩余疲劳寿命循环J积分工程评估方法  

Cyclic J-integral Engineering Assessment Method for Remaining Fatigue Livetime of Crack Structure

作　　者：黄大强[1] 

机构地区：[1]江苏大学理学院,江苏镇江212013

出　　处：《长沙交通学院学报》2006年第4期28-32,共5页Journal of Changsha Communications University

摘　　要：以弹塑性断裂理论为基础,利用EPR I工程方法计算ΔJ,拟合出16Mn钢的疲劳裂纹扩展率公式,并推导出含裂纹结构剩余疲劳寿命评估的循环J积分工程计算公式,为含裂纹结构在塑性应变条件下剩余疲劳寿命评估提供一种计算方法。Based on elasticity-plasticity fracture theory, the formula of fatigue crack growth rate for 16Mn steel was established using EPRI engineering method for calculating △J. Engineering calculating formula on cyclic J-integral ductile crack growth for remaining fatigue lifetime of crack structure was deduced, and so it provides a method calculating the remaining fatigue lifetime for crack structure.

关 键 词：16Mn 疲劳裂纹扩展率 循环J积分 疲劳寿命 

分 类 号：O346.1[理学—固体力学]