电阻法检测金属构件损伤及预测疲劳寿命
Damage Measurement and Fatigue Life Prediction for Metallic Components by Electrical Resistance Method
摘 要
基于非线性连续疲劳损伤理论，考虑应力幅带来的非线性累积效应，以电阻值定义金属构件损伤参量，提出基于电阻变化的金属高周疲劳损伤累积模型及疲劳载荷应力幅对损伤参量的影响函数，给出通过测量电阻来检测金属构件疲劳损伤状态的方法及预测高周疲劳剩余寿命的理论公式，并通过45号钢高周疲劳试验进行验证。
疲劳损伤
电阻法
寿命预测
Metallic components
Fatigue damage
Electrical resistance method
Life prediction
Abstract
Presented is a life prediction model based on the variation of electrical resistance for metallic components experiencing high cycle fatigue load. Combining nonlinear continual fatigue damage accumulation theories with calculation formula for electrical resistance of metals, and taking into account the nonlinear effects of cycle stress on damage accumulation, a promising damage measuring method and a fatigue life prediction model concerned only with variation of electrical resistance are then proposed. The effect of cycle stress on nonlinear damage factor is analyzed as well. Experimental data from 45# steel agree well with the theoretical results adopting the proposed model in this paper.
中图分类号 TG115.28
所属栏目 科研成果与学术交流
基金项目 国家自然科学基金资助项目(50539090)；引进人才科研启动基金资助项目；河海大学自然科学基金资助项目(2007418311)
收稿日期 2007/1/22
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备注黄 丹(1979-)，男，博士，讲师，从事破坏力学研究。
引用该论文: HUANG Dan,ZHANG Qing,GUO Yi-Mu. Damage Measurement and Fatigue Life Prediction for Metallic Components by Electrical Resistance Method[J]. Nondestructive Testing, 2008, 30(4): 213～215
黄 丹,章 青,郭乙木. 电阻法检测金属构件损伤及预测疲劳寿命[J]. 无损检测, 2008, 30(4): 213～215
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参考文献
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【7】黄 丹,许平聪,郭乙木.金属疲劳剩余寿命预测模型的一种探索[J].实验力学,2003,18(1):113-117.
【8】孙斌祥,郭乙木.考虑电阻率变化的电阻法预测金属材料剩余寿命[J].工程设计,2001,8(2):81-84.
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【2】XiaoYC, Li S, Gao Z. A continuum damage mechanics model for high cycle fatigue[J]. International Journal of Fatigue,1998,20(7):503-508.
【3】Alves M, Yu JL, Jones N. On the elastic modulus degradation in continuum damage mechanics[J]. Computer and Structure,2000,76(6):703-712.
【4】马宝钿,杜百平,朱维斗,等.电阻法检测疲劳损伤及预测修复效果探讨[J].理化检验(物理分册),2002,38(11):493-495.
【5】Chen Q, Kawagoishi N, Nisitani H. Evaluation of fatigue crack growth rate and life prediction of Inconel 718 at room and elevated temperatures[J]. Materials Science and Engineering A,2000,277(2):250-257.
【6】周洪刚.金属材料高周疲劳损伤研究和寿命预测探索[D].杭州：浙江大学,2003.
【7】黄 丹,许平聪,郭乙木.金属疲劳剩余寿命预测模型的一种探索[J].实验力学,2003,18(1):113-117.
【8】孙斌祥,郭乙木.考虑电阻率变化的电阻法预测金属材料剩余寿命[J].工程设计,2001,8(2):81-84.
【9】Fatemi A, Yang L. Cumulative fatigue damage and life prediction theories：A survey of the state of the art for homogeneous materials[J]. International Journal of Fatigue,1998,20(1):9-34.
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