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纳秒脉冲、千兆瓦级激光辐照金属材料产生高压等离子体冲击波,作用于金属材料表面并向内传播,产生残余压应力场。但在单次冲击加载时,残余压应力场中心出现的残余压应力值小于加载边缘,应用理论分析和实验测试的方法解释了这一过程,并结合激光诱导冲击波Fabbro方程和TC4钛合金动态响应模型,建立了不同形式冲击波加载TC4钛合金的数值仿真模型,分析了冲击波压力、作用时间和加载形式对中心压应力缺失的影响。
Nanosecond pulses, gigawatt laser irradiation of metallic materials to produce high-pressure plasma shock wave, acting on the surface of metal materials and inward propagation, resulting in residual compressive stress field. However, the residual compressive stress in the center of the residual compressive stress field is smaller than that of the loading edge at the time of single impact loading. Theoretical and experimental methods are used to explain this process. Combining the Fabry equation of laser-induced shock wave and the dynamic response of TC4 titanium alloy Model, a numerical simulation model of different types of shock wave loaded TC4 titanium alloy was established, and the influence of shock wave pressure, action time and loading form on the loss of central compressive stress was analyzed.