CAJ | 학술논문

用分子动力学模拟方法研究了 RDX和 HMX晶体的力学性能。用撞击加载实验、激光粒度仪和扫描电子显微镜分析了两种晶体的破碎特性。结果表明：HMX晶体的弹性系数和模量计算值大于 RDX晶体，RDX晶体的延展性好于 HMX 晶体。在相同撞击加载条件下，RDX和 HMX晶体均发生塑性形变和脆性断裂，但前者以塑性形变为主，而后者以脆性断裂为主，且破碎程度更加显著。评价不同炸药晶体力学性能间差异性的分子动力学模拟方法具有较高的准确度和有效性。
용분자동역학모의방법연구료 RDX화 HMX정체적역학성능。용당격가재실험、격광립도의화소묘전자현미경분석료량충정체적파쇄특성。결과표명：HMX정체적탄성계수화모량계산치대우 RDX정체，RDX정체적연전성호우 HMX 정체。재상동당격가재조건하，RDX화 HMX정체균발생소성형변화취성단렬，단전자이소성형변위주，이후자이취성단렬위주，차파쇄정도경가현저。평개불동작약정체역학성능간차이성적분자동역학모의방법구유교고적준학도화유효성。
The mechanical properties of RDX and HMX crystals were investigated by using molecular dynamics simulation method. The fracture properties of the crystals were analyzed with impact test,laser diffraction size analyzer and scanning electron micro-scope. The results show that the calculated elastic constants and modulus of HMX crystals are higher than those of RDX crystals. The ductibility of RDX crystals is better than that of HMX crystals. Under the same impact condition,both the plastic deformation and fragmentation appear in crystals. The plastic deformation is preponderant in RDX crystals,and the fragmentation is preponder-ant in HMX crystals and their fracture is much more severe. The molecular dynamics simulation on the mechanical property for dif-ferent explosive crystals is accuracy and reliability.