激光冲击波传播特性对E690钢表面微凹坑动态塑性变形的影响

doi:10.13251/j.issn.0254-6051.2022.06.045

金属热处理 ›› 2022, Vol. 47 ›› Issue (6): 253-258.DOI: 10.13251/j.issn.0254-6051.2022.06.045

激光冲击波传播特性对E690钢表面微凹坑动态塑性变形的影响

王志敏¹, 黄春玲², 曹宇鹏¹

1.南通大学机械工程学院, 江苏南通 226019;
2.江苏五星波纹管有限公司, 江苏泰州 225500

收稿日期:2021-12-28 修回日期:2022-04-30 出版日期:2022-06-25 发布日期:2022-07-05
通讯作者: 曹宇鹏,副教授,博士,E-mail:cyp19812004@ntu.edu.cn
作者简介:王志敏(1996—),男,硕士研究生,主要研究方向为激光加工,E-mail:1149172479@qq.com。
基金资助:
中国博士后科学基金面上项目(2019M651931);江苏省博士后科研计划(2021K606C);国家高技术船舶科研项目(MC-202031-z07);国家重点研发计划(2019YFB2005300)

Influence of laser shock wave propagation characteristics on dynamic plastic deformation of micro-dimple on E690 steel surface

Wang Zhimin¹, Huang Chunling², Cao Yupeng¹

1. School of Mechanical Engineering, Nantong University, Nantong Jiangsu 226019, China;
2. Jiangsu Five Star Corrugated Pipe Co., Ltd., Taizhou Jiangsu 225500, China

Received:2021-12-28 Revised:2022-04-30 Online:2022-06-25 Published:2022-07-05

摘要/Abstract

摘要： 为研究激光冲击次数以及多次冲击过程中冲击波的传播特性对微凹坑动态塑性变形的影响,利用ABAQUS有限元软件分析了应力波在E690高强钢中的传播规律及微凹坑动态塑性应变规律,并设计试验验证了仿真的准确性。结果表明,由冲击压力引起的应力波在材料深度方向的衰减呈现先快后慢的特性,第3次和第4次冲击过程中应力波的衰减速度基本接近。受冲击波动态传播过程中表面波与纵波协同作用的影响,微凹坑表面塑性变形深度整体呈现沿光斑中心径向向四周递减,对比冲击1~4次后微凹坑深度方向塑性变形的测试结果与模拟结果,最大误差为4.80%,仿真模型准确可靠。同时,多次冲击后表面硬度增加趋势变缓,4次冲击后微凹坑表面出现硬化饱和现象。

关键词: E690高强钢, 激光冲击微凹坑, 冲击波传播, 动态塑性应变, 数值模拟

Abstract: Influence of laser shock times and shock wave propagation characteristics on dynamic plastic deformation of micro-dimple during multiple shocks was studied by using the software ABAQUS to analyze the propagation law of stress waves in E690 high-strength steel and the dynamic plastic strain of the micro-dimple on the steel surface. Then the accuracy of the simulation was verified by designed experiments. The results show that the attenuation of the stress wave caused by the shock pressure in the depth direction of the material shows the characteristics of first fast and then slow. The attenuation speed of the stress wave during the third shock and fourth shock is basically close. Affected by the synergistic effect of surface waves and longitudinal waves during the dynamic propagation of shock waves, the overall plastic deformation depth of the micro-dimple surface decreases along the center of the spot radially to the surroundings. Comparing the test results and simulation results of plastic deformation in the depth direction of micro-dimple after shocking for 1-4 times, the maximum error is 4.80%, indicating that the simulation model is accurate and reliable. Simultaneously, as the times of shock increase, the increasing trend of hardness slows down, and the micro-dimple surface appears hardening saturation after four shocks.

Key words: E690 high-strength steel, laser shock micro-dimple, shock wave propagation, dynamic plastic strain, numerical simulation

中图分类号:

王志敏, 黄春玲, 曹宇鹏. 激光冲击波传播特性对E690钢表面微凹坑动态塑性变形的影响[J]. 金属热处理, 2022, 47(6): 253-258.

Wang Zhimin, Huang Chunling, Cao Yupeng. Influence of laser shock wave propagation characteristics on dynamic plastic deformation of micro-dimple on E690 steel surface[J]. Heat Treatment of Metals, 2022, 47(6): 253-258.

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激光冲击波传播特性对E690钢表面微凹坑动态塑性变形的影响

Influence of laser shock wave propagation characteristics on dynamic plastic deformation of micro-dimple on E690 steel surface

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