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中文摘要：
为研究脉冲激光冲击波诱导2024铝合金表面的动态应变特性,采用脉冲激光对2024铝合金试样表面进行冲击,并利用聚偏氟乙烯（PVDF）压电传感器测量了脉冲激光作用下2024铝合金表面的动态应变,建立了脉冲激光冲击波加载2024铝合金表面的动态应变模型,并通过试验数据对该模型进行了分析验证。研究结果表明,通过调整脉冲激光的作用参数可以控制激光冲击波与表面波不产生耦合;2024铝合金在激光冲击波诱导高应变率作用下的动态应力-应变关系曲线与在静力拉伸条件下的静态应力-应变关系曲线类似;脉冲激光冲击波加载2024铝合金表面动态应变的模型与试验结果一致。
英文摘要：
In order to study the dynamic strain on 2024 aluminum alloy surface induced by apulsed laser shock wave,the pulsed laser is used to impact on a 2024 aluminum alloy sample,and the dynamic strain on the 2024 aluminum alloy surface which is under the effect of the pulsed laser shock is measured by apolyoing lidene fluoride（PVDF）piezoelectric sensor.A dynamic strain model of 2024 aluminum alloy surface loaded by the pulsed laser shock wave is established and verified by experimental data.The results show that the laser shock wave and surface wave can′t couple by adjusting the parameters of laser pulse.The relationship curve of the dynamic stress-strain of 2024 aluminum alloy under high strain rate of pulsed laser shock wave is similar to the static stress-strain relationship curve of 2024 aluminum alloy under static tensile condition.The experimental results are consistent with the dynamic strain model of 2024 aluminum alloy surface loaded by the pulsed laser shock wave.
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