2024铝合金薄板激光冲击波加载的实验研究

冯爱新; 聂贵锋; 曹宇鹏; 周鹏程; 李彬; 施芬

doi:10.3724/SP.J.1037.2011.00577

金属学报 >

2012 , Vol. 48 >Issue 2: 205 - 210

DOI: https://doi.org/10.3724/SP.J.1037.2011.00577

论文

2024铝合金薄板激光冲击波加载的实验研究

冯爱新 ,
聂贵锋 ,
曹宇鹏 ,
周鹏程 ,
李彬 ,
施芬

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1. 江苏大学机械工程学院, 镇江 212013
2. 温州大学机械工程学院, 温州 325035
3. 南通大学机械工程学院, 南通 226019

冯爱新, 男, 1970年生, 教授

收稿日期: 2011-09-15

修回日期: 2011-12-15

网络出版日期: 2012-02-11

基金资助

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和江苏大学“拔尖人才培养工程”优秀青年学术骨干培养对象课题项目资助

收起

EXPERIMENTAL RESEARCH ON LASER SHOCK WAVE LOADING MECHANISM OF 2024 ALUMINUM ALLOY SHEET

FENG Ai-Xin ,
ZHE Gui-Feng ,
CAO Yu-Peng ,
ZHOU Peng-Cheng ,
LI Ban ,
YI Fen

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1. School of Mechanical Engineering, Jiangsu University, Zhenjiang 212013
2. School of Mechanical Engineering, Wenzhou University, Wenzhou 325035
3. School of Mechanical Engineering, Nantong University, Nantong 226019

Received date: 2011-09-15

Revised date: 2011-12-15

Online published: 2012-02-11

Supported by

Supported by National Science Foundation of China (No.51175237), China Postdoctoral ScienceFoundation (No.20100481096), Postdoctoral Science Foundation of Jiangsu Province (No.1002029C) and Senior Start Funds of Jiangsu University (No.09JDG090)

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摘要

采用高功率激光束单次冲击3种厚度(1.3 mm, 1.7 mm, 2.1 mm)的2024铝合金薄板靶材, 利用STSS-1应力检测模块采集靶材背面应变片的动态与静态应变信号, 并用XRD技术检测了靶材表面残余应力. 建立了2024铝合金薄板靶材激光冲击波加载模型,并利用该模型描述了靶材内部应力波结构及传播规律, 解释了冲击区域残余拉应力产生的原因. 结果表明, 激光冲击2024铝合金薄板靶材时,激光诱导的冲击波和约束层对冲击波的反射波透射到靶材内部各部位的应力波具有不同的特性和强度变化规律. 激光功率密度远超出2024铝合金最佳激光功率密度范围和靶材厚度较薄这2个条件同时存在是冲击区域残余拉应力产生的根源所在.

关键词： 激光冲击波; 应力波; 动态应变; ; 2024铝合金

本文引用格式

冯爱新 , 聂贵锋 , 曹宇鹏 , 周鹏程 , 李彬 , 施芬 . 2024铝合金薄板激光冲击波加载的实验研究[J]. 金属学报, 2012 , 48(2) : 205 -210 . DOI: 10.3724/SP.J.1037.2011.00577

Abstract

2024 aluminum alloy sheets with three different thicknesses were shocked by means of a single laser shock processing. Static and dynamic strain signals from the strain gauges on the back of the target were measured by STSS–1 stress test module. Residual stresses of target surfaces were measured by XRD. The loading model by the laser shock waves in 2024 aluminium alloy sheets was established, the stress wave propagations and stress wave structures inside the targets were described, and the reasons of generating residual tensile stress in the impact areas were explained. The results indicate that laser shock waves reflected and transmitted have different properties and intensities at the different places of target surfaces. When the laser power density is far beyond the best power density range of 2024 aluminum alloy and the target material is thin enough, the tensile residual stresses are generated.

Key words： laser shock wave; stress wave; dynamic strain; 2024 aluminum alloy

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