基于非线性表面波检测奥氏体不锈钢应力腐蚀早期损伤的仿真研究

doi:10.3901/JME.2020.10.050

机械工程学报 ›› 2020, Vol. 56 ›› Issue (10): 50-56.doi: 10.3901/JME.2020.10.050

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基于非线性表面波检测奥氏体不锈钢应力腐蚀早期损伤的仿真研究

石媛媛, 李萍, 赵杰, 程从前

大连理工大学材料科学与工程学院大连 116024

收稿日期:2019-07-29 修回日期:2019-10-19 出版日期:2020-05-20 发布日期:2020-06-11
通讯作者: 李萍(通信作者),女,1969年出生,博士,副教授。主要研究方向为材料无损表征与评价。E-mail:liping69@dlut.edu.cn
作者简介:石媛媛,女,1995年出生。主要研究方向为材料无损表征与评价。E-mail:trixieyuanyuan@163.com
基金资助:
2016NSFC-山西煤基低碳联合基金重点（U1610256）和国家自然科学基金（51571051）资助项目。

Simulation Study on Early Stress Corrosion Damage Detection of Austenitic Stainless Steel Based on Nonlinear Surface Wave

SHI Yuanyuan, LI Ping, ZHAO Jie, CHENG Congqian

School of Material Science and Engineering, Dalian University of Technology, Dalian 116024

Received:2019-07-29 Revised:2019-10-19 Online:2020-05-20 Published:2020-06-11

摘要/Abstract

摘要： 为了探索利用非线性表面波检测奥氏体不锈钢应力腐蚀早期损伤的方法，应用ANSYS和ABAQUS有限元数值模拟软件，基于弹塑性变形本构关系，采用重构的方法，实现应力场与超声场的耦合，进一步探讨恒应力状态下微裂纹的宽度与深度、受力方向（拉/压）与大小对非线性超声表面波传播特性的影响。结果表明，恒载荷作用下，微裂纹宽度与非线性系数呈负相关，深度与非线性系数呈正相关；拉应力作用下，微裂纹变宽，透射表面波能量降低，界面周期性振动引发的拍击和滑移效应减弱，抑制高次谐波的产生，而且微裂纹极限宽度随着拉应力的增大而减小；压应力的作用效果与之相反。所以非线性表面波与恒应力状态下微裂纹之间交互作用的研究对应力腐蚀早期损伤的检测有重要的工程应用价值。

关键词: 非线性表面波, 奥氏体不锈钢, 应力腐蚀, 微裂纹, 恒应力, 仿真

Abstract: In order to explore the method of detecting the early stress corrosion damage of austenitic stainless steel by nonlinear surface wave, the reconstruction method is used to realize the coupling between stress field and ultrasonic field based on the elastic-plastic deformation constitutive relation by means of ANSYS and ABAQUS finite element numerical simulation software. Furthermore, the influence of micro-crack width and depth, stress direction (tension/compressive) and magnitude on the propagation characteristics of nonlinear ultrasonic surface wave are discussed. The results show that under constant loading, the width of micro-crack is negatively correlated with the nonlinear coefficient, while the depth is positively correlated with the nonlinear coefficient. The micro-crack is widen under the tensile stress, which not only reduces the transmitted surface wave energy, but also weakens the flapping and sliding effects caused by periodic vibration of the interface, so as to inhibit the generation of higher harmonics. Moreover, the critical width of micro-crack decreases with the increase of tensile stress. Compressive stress does the opposite. Therefore, the study on the interaction between the nonlinear surface wave and the micro-crack under constant stress has important engineering application value for the detection of early stress corrosion damage.

Key words: nonlinear surface wave, austenitic stainless steel, stress corrosion, micro crack, constant stress, simulation

中图分类号:

TB551

石媛媛, 李萍, 赵杰, 程从前. 基于非线性表面波检测奥氏体不锈钢应力腐蚀早期损伤的仿真研究[J]. 机械工程学报, 2020, 56(10): 50-56.

SHI Yuanyuan, LI Ping, ZHAO Jie, CHENG Congqian. Simulation Study on Early Stress Corrosion Damage Detection of Austenitic Stainless Steel Based on Nonlinear Surface Wave[J]. Journal of Mechanical Engineering, 2020, 56(10): 50-56.

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基于非线性表面波检测奥氏体不锈钢应力腐蚀早期损伤的仿真研究

Simulation Study on Early Stress Corrosion Damage Detection of Austenitic Stainless Steel Based on Nonlinear Surface Wave

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