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激光诱导2024铝合金表面动态应变检测
引用本文:冯爱新,施芬,韩振春,薛伟,李彬,杨润,卢轶.激光诱导2024铝合金表面动态应变检测[J].强激光与粒子束,2013,25(4):872-874.
作者姓名:冯爱新  施芬  韩振春  薛伟  李彬  杨润  卢轶
作者单位:1.江苏大学 机械工程学院, 江苏 镇江 21 201 3;
基金项目:国家自然科学基金项目(51175237);中国博士后基金项目(20100481096);江苏省博士后基金项目(1002029C);江苏大学高级人才启动基金项目(09JDG090);江苏省“六大人才高峰”A类项目;江苏省企业博士集聚计划项目;江苏大学“拔尖人才培养工程”优秀青年学术骨干培养对象课题
摘    要:采用PVDF贴片传感器对脉冲激光作用下2024铝合金表面的动态应变进行了测量,分析了动态应变曲线的特性。结果表明,PVDF贴片传感器在动态应变测量中动态响应快,灵敏度高,可有效应用于脉冲激光诱导材料表面动态应变的实时测量。脉冲激光作用过程中,2024铝合金冲击光斑周围材料先受挤压,后压应变减小。脉冲激光作用结束后,2024铝合金冲击光斑周围材料表面粒子在卸载稀疏波和表面稀疏波的作用下不断往复运动,冲击光斑周围材料甚至受到了拉应变的作用。最后随着时间的推移,材料表面粒子的动态响应经反复震荡后逐渐衰弱形成最终的稳定状态。

关 键 词:脉冲激光    PVDF    2024铝合金    动态应变
收稿时间:2012-08-21;

Measurement of laser-induced dynamic strain on 2024 aluminum alloy surface
Feng Aixin,Shi Fen,Han Zhenchun,Xue Wei,Li Bin,Yang Run,Lu Yi.Measurement of laser-induced dynamic strain on 2024 aluminum alloy surface[J].High Power Laser and Particle Beams,2013,25(4):872-874.
Authors:Feng Aixin  Shi Fen  Han Zhenchun  Xue Wei  Li Bin  Yang Run  Lu Yi
Affiliation:1.School of Mechanical Engineering,Jiangsu University,Zhenjiang 212013,China;2.College of Mechanical and Electrical Engineering,Wenzhou University,Wenzhou 325035,China
Abstract:Polyvinylidene fluoride (PVDF) patch sensors were pasted beside the laser shock spot to measure the dynamic strain on the 2024 aluminum alloy surface induced by pulse lasers, and then the characteristics of the dynamic strain curves were analyzed. The results indicate that PVDF patch sensors have the characteristics of quick dynamic response and high sensitivity, and can be applied effectively to real-time measurement of laser-induced dynamic strain. During laser shock processing, the material around the shock spot of 2024 aluminum alloy is compressed first, then the compressive strain decreases. After laser shock processing, the surface particles around the shock spot of 2024 aluminum alloy are doing reciprocating motion constantly under the action of unloading rarefaction wave and surface rarefaction wave. The material around the shock spot is even in the tension. Finally, the dynamic response of the surface particles tends to stability.
Keywords:polyvinylidene fluoride  2024 aluminum alloy  dynamic strain
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