加载应变率为104‒105/s的Al-Cu梯度飞片材料的设计与动态实验

Design and Dynamic Experiment of Al-Cu Graded Materials Impactor with Strain Rate of 104–105/s

摘要:

基于梯度材料一维波系作用的简化算法设计了Al-Cu梯度飞片材料的加载压力曲线。通过热压法制备相应的Al-Cu梯度材料，其表征后的阻抗性能与设计路径相匹配。采用三维表面轮廓仪检测Al-Cu梯度材料的平行度，并利用一级气炮以400 m/s的速度发射Al-Cu梯度材料冲击Al-LiF靶材。该实验应变率的结果证明了Al-Cu梯度材料能够实现高速冲击实验中应变速率在10⁴–10⁵/s范围的精确控制。

Abstract:

Based on simplified calculations of one-dimensional wave systems, loading pressure platform curves of Al-Cu gradient materials (GMs) impactor were designed. The Al-Cu GMs were prepared using tape-pressing sintering, and their acoustic properties were characterized to match the design path. The parallelism of the Al-Cu GM was confirmed using a three-dimensional surface profilometry machine. A one-stage light-gas gun was used to launch the Al-Cu GM, impacting an Al-LiF target at a velocity of 400 m/s. The results of the experimental strain rate demonstrate that the Al-Cu GMs can realize the precise control of the strain rate within the range of 10⁴?10⁵/s in the high-speed impact experiments.