Numerical simulation of the natural fragmentation of explosively loaded thick walled cylinders

作     者：I.G.CULLIS P.DUNSMORE A.HARRISON I.LEWTAS R.TOWNSLEY 

作者机构：QinetiQFort Halstead.Sevenoaks Raytheon UK.The PinnaclesHarlow 

出 版 物：《Defence Technology（防务技术）》 (Defence Technology)

年 卷 期：2014年第10卷第2期

页      面：198-210页

学科分类：082604[工学-军事化学与烟火技术] 0806[工学-冶金工程] 0817[工学-化学工程与技术] 08[工学] 0826[工学-兵器科学与技术] 0805[工学-材料科学与工程（可授工学、理学学位）] 0802[工学-机械工程] 0703[理学-化学] 0701[理学-数学] 0801[工学-力学（可授工学、理学学位）] 0702[理学-物理学] 

基　　金：financial support of Dstl UK MOD under a Weapons Science and Technology Centre contract SA/004011 

主　　题：数值模拟方法 爆炸加载 自然 厚壁 材料模型 破碎 验证实验 实验室试验 

摘      要：The ability to predict the natural fragmentation of an explosively loaded metal casing would represent a significant *** material models permit the use of small scale laboratory tests to characterise and validate their *** model can then be directly employed to understand and design the system of interest and identify the experiments required for validation of the predictions across a wide area of the performance *** is fundamentally different to the use of phenomenologically based material algorithms which require a much wider range of characterisation and validation tests to be able to predict a reduced area of the performance *** numerical simulation methods are used to describe the fragmentation of thick walled EN24 steel cylinders filled with PBXN-109 *** methodology to characterise the constitutive response of the material using the physically based Armstrong-Zerilli constitutive model and the Goldthorpe path dependent fracture model is described,and the results are *** ability of an Eulerian hydrocode to describe the fragmentation process and reproduce the experimentally observed fragment mass and velocity distributions is presented and *** the suitability of the current experimental analysis methodology for simulation validation is addressed.