CAJ | 학술논문

基于二维平面轴对称模型，采用有限元软件 ANSYS，对 HMX 基 PBX 在温度冲击载荷作用下的温度场和应力场进行数值计算，为了验证有限元模拟分析的可靠性，对 HMX 基 PBX 药柱进行了温度冲击试验，用热电偶和声发射技术测量药柱表面的温度及热损伤。数值计算结果表明，在降温阶段，药柱侧面中部受到较大轴向拉应力作用而产生热损伤。实验结果与计算结果吻合较好，说明 HMX 基 PBX 热损伤破坏方式为拉应力破坏，抗拉强度可以较好地反映材料的耐热损伤能力。
기우이유평면축대칭모형，채용유한원연건 ANSYS，대 HMX 기 PBX 재온도충격재하작용하적온도장화응력장진행수치계산，위료험증유한원모의분석적가고성，대 HMX 기 PBX 약주진행료온도충격시험，용열전우화성발사기술측량약주표면적온도급열손상。수치계산결과표명，재강온계단，약주측면중부수도교대축향랍응력작용이산생열손상。실험결과여계산결과문합교호，설명 HMX 기 PBX 열손상파배방식위랍응력파배，항랍강도가이교호지반영재료적내열손상능력。
The temperature field and the thermal stress field of HMX based polymer bonded explosive (PBX)during ther-mal impact process was simulated by the finite element software ANSYS based on a two-dimentional axis symmetric model. The experiment of thermal shock was carried out by using thermocouples and acoustic emission technique to measure tem-perature and thermal damage respectively.The calculated results show that thermal stress leads to the thermal damage in cooling stage,and the largest tensile stress takes place in the lateral centre of the cylindrical sample.The experiment results agree well with calculated results,indicating that thermal damage of HMX based PBX is caused by tensile stress,and the tensile strength can reflect the ability of heat shock resistance for HMX based PBX preferably.