层状有机玻璃PMMA的冲击极化效应与应用

Shock Induced Polarization of Laminate PMMA and Its Application

研究了层状有机玻璃的冲击极化.通过实验发现了PMMA有机玻璃层状体的冲击极化电流会受到层间界面间断性的干扰,这种干扰信号具有指示冲击波在有机玻璃中运动轨迹的作用,并且进行了验证.又以经典的Allison理论为基础,对层状结构电介质的冲击极化电流做了理论推导,取得了与实验相一致的结果,据此原理提出了一种层状结构的多层冲击极化传感器,用于准连续测量具有冲击极化效应的电介质材料中的冲击波参数.最后,介绍了这种新型传感器在爆炸力学测试中的具体应用实例。

Shock induced polarization (SIP) in PMMA laminas has been studied experimentally and theoretically. It is discovered that when a shock wave passes through the interfaces between layers of a PMMA lamina, some disturbance signals will occur on the SIP current curve. This has proved that the disturbance signal is due to the existence of narrow air layes among the PMMA laminas, which again exhibits a time probe effect indicating the time shock passing through. A theoretical analysis is proposed to interpret the interfacial signals. A new SIP gauge of laminate configuration is developed and other applications of the gange suggested.