冲击加载下两种典型抗高过载炸药的损伤特性

Damage Characteristics of Two Typical Anti-high-loading Explosives under Shock Loading

为研究冲击加载条件下典型抗高过载炸药的损伤特性,基于隔板实验的方法开展了两种典型抗高过载炸药的冲击损伤实验。通过改变隔板厚度,在炸药中产生不同程度的损伤。利用CT系统和扫描电镜研究了不同冲击加载条件下样品的损伤特性。结果表明,损伤后样品的密度变化与成型工艺有关,浇注成型炸药损伤后密度变小;而压装成型炸药损伤后密度变大。浇注炸药的扫描电镜结果表明,随着冲击强度的逐渐增大,炸药晶体与黏结剂之间的脱粘现象越明显,微孔洞也逐渐增大增多。

To study the damage characteristics of typical anti-high-loading explosive under shock loading conditions,a series of shock damage experiments were conducted in casting explosive and pressed explosive based on card gap test. Different card thicknesses were used to achieve different damage degree. The damage characteristic of samples before and after shock loading were studied by use of CT system and scanning electron microscope（ SEM）.The results show that the density changing of damaged samples are related to moulding techniques. The densities of explosive by casting moulding decrease and explosive by pressed fitting increase after shock damage experiments.The SEM of casting explosive results show that with the increase of shock strength,the interface debonding between explosive crystal and binder become more obvious and the microvoid become more bigger.