粘结剂含量对热压TATB基PBX残余应力的影响

为了掌握粘结剂含量对高聚物粘结炸药(PBX)残余应力和宏观力学性能的影响规律,采用基于VKα靶的X射线衍射方法测试了F2314粘结剂含量为0~11%热压成型的TATB基PBX残余应力,采用巴西试验方法测试其宏观力学性能,并采用了TATB晶体-粘结剂包裹结构简化模型进行温度单一因素条件的残余应力数值模拟验证。实验结果表明:不含粘结剂的PBX,其残余应力为拉应力;随着PBX中粘结剂含量增加,残余应力逐渐减小,当粘结剂含量超过5%,其拉伸残余应力递减趋势增强;当粘结剂含量由7%增加到9%时,残余应力由拉应力转变为压应力;PBX力学强度随粘结剂含量增加而增强。残余应力模拟结果与实验结果具有相同变化趋势。

Effect of Binder Content on Residual Stress of Thermally Compacted TATB Based PBX

In order to understanding the influence of binder content on residual stress and mechanical performance of polymer bonded explosive(PBX),the residual stress of warm compacted 1,3,5-triamino-2,4,6-trinitrobenzene (TATB) based PBX,with binder content ranging from 0 to 11％,were measured by VKα based X-ray diffraction method and mechanical properties were measured by Brazilian test.A simplified model of TATB crystal packed with binder structure was introduced for verifying the experiment results only in one condition of temperature.Results show that:the residual stress in PBX without any binder exhibits tensile mode is tension stress,with the binder content increasing,the residual stress reduces gradually.While the content of the binder is added more than 5％,the tensile residual stress reduces seriously.While the content is added from 7％ to 9％,the residual stress turns to performing as compressive mode,the mechanical strength increases gradually with the more binder.The calculated residual stress of PBX agrees well with the experimental results.The experiment results can provide a reference for the formula design of reducing residual stress in TATB based PBX.