分层介质冲击响应的 SHPB 实验研究

摘要

借助 SHPB 实验装置建立了用于分层介质动态性能研究和数据分析的实验方法，通过调整子弹速度进行反复试验，测得由 C30混凝土和泡沫混凝土组成的硬－软分层介质在冲击荷载下的应力、应变随时间的变化关系。实验结果显示，硬－软分层介质表现出的塑性性质明显强于硬材料的塑性，在应力、应变增加时，弹性模量逐渐减小，软材料的吸能作用很好的保护了硬材料，说明硬－软分层介质具有很好的抗高速冲击和削波作用。%Using SHPB test device,a test method used in layered medium dynamic performance study and data analysis was established.By adjusting bullet speeds and testing repeatedly,the varyings of stress and strain of hard -soft layered medium composed of C30 concrete and foam concrete versus time under impact loading were measured.The test results showed that the plastic property of the hard-soft layered medium is much stronger than that of hard material;the elastic modulus of the hard-soft layered medium decreases gradually with increase in stress and strain,the energy absorption action of soft material can effectively protect hard material,so the hard-soft layered medium has a good ability of anti-high speed shock and anti-shock wave propagation.