• CN:11-2187/TH
  • ISSN:0577-6686

机械工程学报

• 数字化设计与制造 • 上一篇    下一篇

基于非线性连续疲劳损伤的再制造毛坯剩余寿命评估

华亮1, 2,  田威3,  廖文和1,  曾超3   

  1. 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
  • 收稿日期:2014-11-27 修回日期:2015-06-05 出版日期:2015-11-05 发布日期:2015-11-05
  • 通讯作者: 田威,男,1977年出生,博士,副教授。主要研究方向为绿色再制造。 E-mail:tw_nj@nuaa.edu.cn
  • 作者简介:华亮,男,1979年出生,博士研究生,讲师。主要研究方向为寿命评估及激光熔覆。 E-mail:hua672@163.com
  • 基金资助:
    国家自然科学基金(51105205)和江苏省高级访问工程师(2014FG060)资助项目

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

HUA Liang1, 2,  TIAN Wei3,  LIAO Wenhe1,  ZENG Chao3   

  • Received:2014-11-27 Revised:2015-06-05 Online:2015-11-05 Published:2015-11-05

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。

关键词:

color: black, font-size: 9pt, layout-grid-mode: char, margin: 0cm 0cm 0pt, mso-ascii-font-family: 'Times New Roman', mso-font-kerning: 0pt">裂纹闭合;疲劳累积损伤;再制造;剩余寿命评估, mso-hansi-font-family: 'Times New Roman', mso-layout-grid-align: none, punctuation-trim: leading" class="MsoNormal">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.

Key words:  fatigue cumulative damage,   remaining life evaluate,   remanufacturing, crack closure