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材料在超高应变率下发生的动态拉伸破碎是冲击波物理领域的一个重要内容,受诊断技术限制,粒子尺寸直接测量的数据非常有限。基于脉冲激光同轴全息技术,建立了一套材料超高应变率破坏状态和破碎粒子诊断的高精度联合测量系统,利用该系统,成功开展了107~108/s超高应变率范围内铝的动态破碎粒子在位测量,获得了粒子尺寸分布数据。
Dynamic tensile fracturing of materials at very high strain rates is an important area in the field of shockwave physics. Limited by diagnostic techniques, the direct measurement of particle size has very limited data. Based on the pulsed laser coaxial holographic technique, a set of high-precision joint measurement system of ultrahigh strain rate failure state and broken particle diagnosis was established. By using this system, the ultra-high strain rate range of 107 ~ 108 / s aluminum Dynamic crushing particles in-situ measurements, obtained particle size distribution data.