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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。
In order to study the dynamic strain characteristics of 2024 aluminum alloy induced by pulsed laser shock wave, the surface of 2024 aluminum alloy was pulsed with pulsed laser and the surface of 2024 aluminum alloy was measured by PVDF piezoelectric sensor The dynamic strain model of 2024 aluminum alloy surface with pulsed laser shock wave was established. The model was verified by experimental data. The results show that the laser shock wave and surface wave can be controlled by adjusting the action parameters of the pulsed laser. The dynamic stress-strain curve of 2024 aluminum alloy under laser shock wave induced high strain rate is the same as that under static tension The static stress-strain curves are similar. The model of the dynamic strain on the surface of 2024 aluminum alloy impacted by pulsed laser shock wave is consistent with the experimental results.