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为了研究压装A-IX-II炸药装药对环境温度的适应性,通过-54~71、-15~71、-54~60、-54~55℃四个温度范围的高低温循环试验研究了1.65、1.70、1.75g/cm3三种装药密度和Φ60mm×60mm、Φ40mm×40mm两种尺寸的A-IX-II炸药药柱裂纹产生的规律,讨论了高低温循环试验中A-IX-II炸药药柱裂纹形成的机理。通过裂纹出现的位置、钝感剂性质和加载温度范围分析了导致A-IX-II炸药药柱产生裂纹的原因。结果表明,在温度循环载荷下高密度和大尺寸药柱更容易产生裂纹。导致A-IX-II炸药药柱产生裂纹的可能原因有两种:一是在老化过程中钝感剂石蜡/硬脂酸体系液化和局部流失使药柱的结构强度下降;二是热胀冷缩形变产生的应力使药柱结构完整性最终被破坏;同时,基于这两种因素解释了药柱密度和尺寸对裂纹产生的影响。
In order to study the adaptability of A-IX-II explosive charge to ambient temperature, the high and low temperature cycling test in four temperature ranges of -54 ~ 71, -15 ~ 71, -54 ~ 60 and -54 ~ 55 ℃ The effects of three charge densities of 1.65,1.70,1.75g / cm3 and cracks of A-IX-II explosives on Φ60mm × 60mm and Φ40mm × 40mm were discussed. The effects of A-IX- II explosive grain crack formation mechanism. The causes of crack formation in A-IX-II explosive columns were analyzed by the location of the crack, the properties of the detergents and the loading temperature range. The results show that under high temperature and cyclic loading, the high density and large size of the grain are more likely to crack. Lead to A-IX-II explosive cartridge cracks may occur for two reasons: First, the degradation of the paraffinic agent in the aging process of paraffin / stearic acid system liquefaction and local loss of structural strength of the drug column decreased; the second is the thermal expansion and cooling At the same time, the influence of grain density and size on the crack is explained based on these two factors.