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用DDVⅢEA型动态粘弹谱仪和UJ40型Izod冲击实验机对硝胺和硝基胍两种火炮发射药的动态粘弹性和冲击断裂性能进行了研究,从理论和实验两方面探讨了火炮发射药动态粘弹性和冲击断裂性能的关系,指出:冲击断裂韧性Gc随动态贮能模量的增加而减小,随β次级转变时tanδ峰值的增加而增加;根据时温等效原理,可以预测火炮发射药身管武器膛内超高速动态条件下应用时的动态力学特性,对进一步改进这两类材料的力学性能具有重要意义。
The dynamic viscoelasticity and impact fracture properties of two ammunition propellants, nitramine and nitroguanidine, were investigated by DDVⅢEA dynamic viscoelastic spectrometer and UJ40 Izod impact tester. Theoretical and experimental studies on the effects of artillery propellant Dynamic viscoelasticity and impact fracture properties. It is pointed out that the impact fracture toughness, Gc, decreases with the increase of dynamic storage modulus and increases with the increase of tan δ peak at β secondary transformation. According to the time-temperature equivalence principle, it can be predicted The dynamic mechanical characteristics of the launchers when used under ultra-high-speed dynamic conditions in the barrel of a weapon are of great significance to further improve the mechanical properties of these two types of materials.