基于损伤演化律的腐蚀疲劳寿命预测方法及应用 -- 西北工业大学学报,2017,35(2):333-338
论文:2017,Vol:35,Issue(2):333-338
引用本文:
韩忠英, 黄小光, 王黎明. 基于损伤演化律的腐蚀疲劳寿命预测方法及应用[J]. 西北工业大学学报
Han Zhongying, Huang Xiaoguang, Wang Liming. The Application of Life Prediction Method for Corrosion Fatigue Based on Damage Evolution Law[J]. Northwestern polytechnical university

基于损伤演化律的腐蚀疲劳寿命预测方法及应用
韩忠英1, 黄小光2, 王黎明2
1. 中国石油大学 石油工程学院, 青岛 266580;
2. 中国石油大学 储运与建筑工程学院, 青岛 266580
摘要:
针对腐蚀疲劳寿命预测解析与试验方法的不足,提出一种基于损伤演化的腐蚀疲劳寿命工程预测方法。综合考虑最大应力控制的应力腐蚀损伤与应力幅值主导的疲劳损伤对腐蚀疲劳寿命的影响,引入非线性累积损伤指数,构建腐蚀疲劳损伤演化律模型。阐述了所提方法的基本思想和主要实现方法,并应用上述方法对超高强度抽油杆FG20(16Mn2SiCrMoVTiA)钢和LY12CZ铝合金的腐蚀疲劳问题进行了研究,分析了不同材料腐蚀疲劳模型损伤参数的变化。
关键词:    腐蚀疲劳    预测方法    非线性累积    损伤演化律   
The Application of Life Prediction Method for Corrosion Fatigue Based on Damage Evolution Law
Han Zhongying1, Huang Xiaoguang2, Wang Liming2
1. School of Petroleum Engineering, China University of Petroleum, Qingdao 266580, China;
2. College of Pipeline and Civil Engineering, China University of Petroleum, Qingdao 266580, China
Abstract:
In view of the shortage of analytical and test methods for corrosion fatigue life prediction, an engineering applicable life prediction method based on damage evolution theory is proposed. Comprehensively considering the influences of the stress corrosion damage controlled by mean stress and fatigue damage controlled by stress amplitude on corrosion fatigue life, a non-linear damage index is introduced to establish the nonlinear accumulation evolution law of corrosion fatigue damage. The basic ideas and the main implementation details of the proposed method are presented. The method is applied to analyze the corrosion fatigue behavior of super-strength sucker rod steel FG20 (16Mn2SiCrMoVTiA) and LY12CZ aluminum alloy in the corrosive liquid, and the variations of damage parameters with materials and fatigue loads are obtained.
Key words:    corrosion fatigue    prediction method    nonlinear accumulation    damage evolution law   
收稿日期: 2016-08-30     修回日期:
DOI:
基金项目: 国家自然科学基金(51404286)与山东省自然科学基金(ZR2014EEQ018)资助
通讯作者:     Email:
作者简介: 韩忠英(1979-),女,中国石油大学讲师,主要从事石油工程相关领域的教学和科研研究。
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