含铝纤维复合炸药的能量输出和力学强度

Energy output and mechanical strength of aluminum-fibre-reinforced composite explosives

通过空中爆炸实验,研究了铝纤维对爆炸能量输出的影响,结果表明:wAl=0.20的TNT/Al,冲击波压力峰值为TNT的1.19倍,TNT当量为TNT的1.29倍;wAl=0.20的RDX/Al,冲击波压力峰值为RDX的1.20倍,爆热为TNT的1.64倍,是RDX的1.31倍。通过抗压实验,研究了铝纤维对炸药力学强度的影响,结果表明,铝纤维能增强TNT炸药的力学强度,破坏应力为6.8 MPa,应变为0.043。铝纤维对炸药能量和力学强度的双重增强特性,可以为现代高性能炸药设计提供参考。

Aluminum fibre was added into TNT and RDX explosives, respectively, to synthesize composite explosives with the aluminum-fibre mass fraction of 0. 2. Air blast experiments were conducted in a steel explosion-containment vessel to investigate the effects of aluminum fibre on the explosive energy output. Results display that the overpressure and explosion heat of the aluminum-fibre-reinforced composite TNT explosive arrive at 1.19 and 1.29 times as high as those of the pure TNT explosive, respectively. The overpressure and explosion heat of the aluminum-fibre-reinforced composite RDX explosive arrive at 1.20 and 1.31 times as high as those of the pure RDX explosive, respectively. And the explosion heat of the aluminum-fibre-reinforced composite RDX explosive is 1.64 times as much as that of the pure TNT explosive. Mechanical strength tests were performed by a WDW4100 almighty test system to analyze the effects of aluminum fibre on the mechanical strength of TNT explosives. Test results show that the damage stress of the composite TNT explosive is up to 6.87 MPa and the corresponding strain is 0. 043. And aluminum fibre can improve the mechanical strength of explosives. This research can provide reference for the design of high explosives.