粘合剂对钨系延期药抗过载性能的影响

Effect of Different Binding Agent on the Property of Tungsten Delay Composition under High Overload

为研究不同粘合剂对钨系延期药抗过载性能的影响,分别采用氟橡胶、硝化棉、酚醛树脂作为粘合剂,对成型的延期药柱力学性能进行了测试,使用分离式霍普金森压杆(SHPB)装置对延期管进行高过载试验,并通过工业CT观察过载后药柱结构损伤情况,对过载前后延期药的延期时间做了比较。结果表明:氟橡胶造粒药剂的弹性模量最小,硝化棉造粒延期药的弹性模量最大,且抗压强度也最大;氟橡胶、硝化棉、酚醛树脂造粒延期药的临界抗过载值分别为15 000g、12 000g、10 000g,药剂过载环境下损伤形式各有不同;随着g值的增大延期时间逐渐缩短,且当过载值高于结构破坏的临界值时,延期管均出现蹿火、瞬发等现象。

Aimed at the effect of different binding agent on anti-overload property of tungsten delay composition, fluororubber, NC, phenolic resin were selected as binding agent, the mechanic property of the delay composition was tested, and the SHPB was used for the high overload test. The structure damage of delay collar suffered high overload was observed by the industrial X-CT, the delay time of delay composition before and after overload test was also compared. The result showed that, the elastic modulus of delay composition pelleted with fluororubber was minimum, and the one pelleted with NC was maximum, so was the compression strength of it. The critical acceleration value of delay composition with fluororubber, NCand phenolic resin were 15 000g, 12 000g and 10 000g respectively, and the damage forms trader high overload were different. Meanwhile, the delay time decreased with the increase of acceleration, when the acceleration value was higher than the critical one, the delay collar fired immediately.