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为了解添加剂对B炸药力学性能的影响,分别添加2%的热塑性弹性体(VP-401和VP-501)、1%或3%的季戊四醇和丙稀醛缩合的热固树脂/硫酸二乙酯(123树脂/DES)、5%固化系数0.6和0.8的端羟基聚丁二烯/二苯甲烷-4,4’-二异氰酸酯(HTPB/MDI),制备了相应6个改性B炸药配方(B-1、B-2、B-3、B-4、B-5和B-6)。进行了静态压缩试验、巴西试验和分离式霍普金森压杆试验,获得了改性B炸药在静力压缩、间接拉伸和低速冲击作用下的应力-应变曲线。对比分析了改性B炸药的强度和韧性变化。结果表明,与B炸药相比,B-1和B-2的压缩弹性模量分别增加了1.49 GPa和2.28 GPa,压缩强度分别增加了6.7 MPa和6.3 MPa,其压缩弹性和韧性均好于B炸药。应变率500 s-1时,与B炸药相比,B-3和B-4的动态压缩强度分别增加了1.99 MPa和7.61 MPa,而B-5和B-6的动态压缩强度分别降低了8.33 MPa和19.47 MPa。这说明,B-3和B-4的抗低速冲击能力提高,B-5和B-6炸药的抗低速冲击能力降低。
In order to understand the effect of additives on the mechanical properties of explosive B, 2% thermoplastic elastomer (VP-401 and VP-501), 1% or 3% pentaerythritol and acrylamide condensation thermosetting resin / (HTPB / MDI) with 5% Curing Coefficient of 0.6 and 0.8, respectively, were prepared by using the modified B explosives (123 resin / DES) B-1, B-2, B-3, B-4, B-5 and B-6). The static compression test, Brazilian test and split Hopkinson pressure bar test were carried out to obtain the stress-strain curve of modified B explosive under static compression, indirect tension and low-velocity impact. Comparative analysis of the modified B explosive strength and toughness changes. The results showed that the compressive elastic modulus of B-1 and B-2 increased by 1.49 GPa and 2.28 GPa respectively compared with that of B explosive, the compressive strength increased by 6.7 MPa and 6.3 MPa respectively, and the compressive elasticity and toughness of B-1 and B-2 were better than B Explosives. The dynamic compressive strength of B-3 and B-4 increased by 1.99 MPa and 7.61 MPa, respectively, compared with B explosives at strain rate of 500 s-1, while the dynamic compressive strength of B-5 and B-6 decreased by 8.33 MPa and 19.47 MPa. This shows that B-3 and B-4 have higher resistance to low-speed impact and B-5 and B-6 explosives have lower resistance to low-speed impact.