Study On Deformation Law And Fragment Performance Of Warhead Shell Under Three Kinds Of Explosive Loading

For warhead shells under the third generation high explosive charge, this paper detailly researched the process of fragments formation of classic material shells from three aspects, such as the relationship of the characteristics of warhead materials and the process of shell expansion and fracture, the effect law of shell thickness to fragments’ characteristics, and the effect law of various warhead materials to fragments’ characteristics.Firstly, this paper theoretically analyzed the process of shell radial expansion of various warhead materials. It built the theoretical model of the process, and acquired the motion equation of shell expansion under explosive internal detonation. The paper also applied AUTODYN-3D finite element analysis software to numerically simulate the process of shell expansion of various warhead materials. It acquired the effect law of warhead material characteristics to the process of shell expansion under the third generation high explosive charge. It compared the results obtained by theoretical analysis and numerical simulation.Then the paper applied a special software of fragment warhead design and AUTODYN-3D finite element analysis software to research the situation of fragment formation under the third generation high explosive charge. It acquired the effect law of shell thickness and various warhead materials to fragment mass distribution and initial velocity. It also built the function of fragment mass distribution and the function of fragment maximum initial velocity which is applicable to the the situation of fragment formation under the third generation high explosive charge.Lastly, the paper designed three experiments, such as high speed photography of the process of shell expansion and fracture, fragments collection of shell static explsion, and fragments’ maximum velocity test, to verify the results of theoretical analysis and numerical simulation.