激光冲击2024 铝合金诱导动态应力应变实验研究

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振动与冲击 ›› 2013, Vol. 32 ›› Issue (14) : 200-203.

论文

激光冲击2024 铝合金诱导动态应力应变实验研究

冯爱新1,2,韩振春1,聂贵锋1,3,薛伟2,李彬1,施芬1,卢轶1

作者信息 +

Experimental research on the induced stress-strain of aluminum alloy 2024 after lasershocking

Feng Aixin1,2 Han Zhenchun1 Nie Guifeng1,3 Xue Wei2 Li Bin1 Shi Fen1 Lu Yi1

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摘要

为了研究激光冲击波动态加载过程中金属材料的动态应力应变特性,采用高功率激光器单次冲击2024 铝合金薄板，利
用STSS-1 应力检测模块采集激光冲击波动态加载靶材背面的动态应变信号，通过Johnson-Cook 动态本构模型计算相应的动
态应力,并用XRD 技术检测了靶材表面的残余应力。实验结果表明：激光冲击波诱导的塑性应力波强度远大于弹性应力波强度，
材料主要处于塑性变形阶段；随着靶材厚度减小，靶材背面应力波强度增加，此应力波在靶材背面金属/空气界面的反射波强
度增强；实验使用的2024 铝合金屈服强度在392MPa 左右。

Abstract

In order to study the properties of the metal material’s dynamic stress-strain induced by laser shock wave
loading process. 2024 aluminum alloy sheets was shocked by high power laser, STSS-1 stress testing module was
applied to collect the dynamic strain signal on the back of the target sheets during laser shock processing, the
relative dynamic stress was calculated by using Johnson-Cook constitutive model and the residual stress was
measured by XRD. The results indicate that: plasticity of stress wave induced by laser shock wave far outweighs
the induced elastic stress wave and materials is mainly in a plastic deformation stage; The stress wave strength in
target’s backside becomes stronger as the target’s thickness decreases. The intensity of reflected wave, generated by
the stress wave is enhanced in the metal/air interface; The yield strength of 2024 aluminum alloy is about 392MPa
in the experiment.

导出引用

冯爱新;韩振春;聂贵锋;薛伟;李彬;施芬;卢轶. 激光冲击2024 铝合金诱导动态应力应变实验研究[J]. 振动与冲击, 2013, 32(14): 200-203

Feng Aixin;Han Zhenchun Nie Guifeng;Xue Wei Li Bin Shi Fen Lu Yi. Experimental research on the induced stress-strain of aluminum alloy 2024 after lasershocking[J]. Journal of Vibration and Shock, 2013, 32(14): 200-203