基于非线性连续疲劳损伤的再制造毛坯剩余寿命评估  

Remaining Life Evaluation for Remanufacturing Blanks Based on Non-linear Continuum Fatigue Damage Model

作　　者：华亮[1,2] 田威[3] 廖文和[1] 曾超[3] 

机构地区：[1]南京航空航天大学理学院,南京211106 [2]南京铁道职业技术学院动力工程学院,南京210031 [3]南京航空航天大学机电学院,南京210016

出　　处：《机械工程学报》2015年第21期132-136,共5页Journal of Mechanical Engineering

基　　金：国家自然科学基金(51105205);江苏省高级访问工程师(2014FG060)资助项目

摘　　要：在考虑裂纹闭合效应对疲劳损伤影响的情况下,对Chaboche提出的非线性连续疲劳累积损伤模型进行了修正,得到了疲劳累积损伤及再制造毛坯剩余寿命评估模型,并由对称循环拉压疲劳试验数据得出了修正模型的相关参数。通过二级加载(高低加载和低高加载)拉压疲劳试验对再制造毛坯剩余寿命评估模型进行了验证,结果表明模型计算值和试验值吻合良好,证明修正后的模型能够准确预测再制造毛坯的剩余寿命。Chaboche＇s model of nonlinear continuum fatigue damage is modified based on the impact of crack closure effect on fatigue damage. A cumulative fatigue damage model is developed accordingly to predict the remaining life for condemned products to be remanufactured. The related parameters are concluded from fully reversed fatigue experiment. To verify the proposed model, tension-compression fatigue tests under two levels of load spectrum（high-low loading and low-high loading） are carried out. The results showed that the calculated value and experimental value are in good agreement. It has been proved to be an efficient method to predict the remaining life involved in remanufacturing technology.

关 键 词：裂纹闭合 疲劳累积损伤:再制造 剩余寿命评估 

分 类 号：TN249[电子电信—物理电子学]