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介绍了激光驱动飞片加载金属箔板成形的方法。采用激光驱动飞片的Gurney模型,计算得出功率密度0.64 GW/cm~2时,10μm厚的铝飞片速度可达到250 m/s,碰撞压力为1.9 GPa,是约束模型下激光诱导压力的3倍左右。表明激光驱动飞片加载的成形能力显著高于激光直接冲击;采用LS-DYNA软件数值模拟了激光驱动飞片加载铝箔微成形过程,发现冲击载荷下飞片应力、速度变化的模拟结果与理论计算吻合度较好,验证了激光驱动飞片加载机制的正确性。
The method of forming laser-driven flyer loaded metal foil is introduced. The Gurney model of the laser-driven flyer was used to calculate the laser-induced pressure of the constrained model when the power density was 0.64 GW / cm ~ 2 and the speed of the 10 μm-thick aluminum flyer was 250 m / s and the collision pressure was 1.9 GPa About 3 times. The results show that the forming capability of the laser-driven flyer is significantly higher than that of the laser direct impacting. The LS-DYNA software is used to simulate the micro-forming process of the laser-driven flyer loaded aluminum foil. The simulation results and theoretical calculations Good agreement, verify the correctness of the laser driven flyer loading mechanism.