Study on fragmentation of PELE against thin targets  

作　　者：蒋建伟 张谋 门建兵 王树有 

机构地区：[1]State Key Laboratory of Explosion Science and Technology Beijing Institute of Technology

出　　处：《Journal of Beijing Institute of Technology》2011年第2期168-172,共5页北京理工大学学报（英文版）

基　　金：Supported by the Doctoral Program Foundation of Higher Education (20070007026)

摘　　要：The fragments mass and size from penetrator with enhanced lateral effect （PELE） perforating thin rolled homogenous armor （RHA） target was characterized through theoretical and numerical methods. An analytical model based on energy-limited spall （ELS） was proposed to predict fragments mass distribution of PELE with different cores and impact velocities. For different cores the expansion can be represented by a scaling factor l in the analytical calculation. The explicit finite-element （FE）-analysis of PELE fragmentation was implemented with stochastic failure criterion in AUTODYN-3D code. By statistical distribution of ＂weak points＂ in numerical model of PELE, the dynamic fragmentation was delineated to simulate Flaw-limited spall as in real material. To verify the accuracy of theoretical calculation and validate numerical results, experiments of PELE perforating thin RHA target was setup, fragments were collected by using recovery cabin filled with foam and soft sands. Both energy limited spall theory and Flaw limited approach showed accurate results compared with experimental data.The fragments mass and size from penetrator with enhanced lateral effect （PELE） perforating thin rolled homogenous armor （RHA） target was characterized through theoretical and numerical methods. An analytical model based on energy-limited spall （ELS） was proposed to predict fragments mass distribution of PELE with different cores and impact velocities. For different cores the expansion can be represented by a scaling factor l in the analytical calculation. The explicit finite-element （FE）-analysis of PELE fragmentation was implemented with stochastic failure criterion in AUTODYN-3D code. By statistical distribution of ＂weak points＂ in numerical model of PELE, the dynamic fragmentation was delineated to simulate Flaw-limited spall as in real material. To verify the accuracy of theoretical calculation and validate numerical results, experiments of PELE perforating thin RHA target was setup, fragments were collected by using recovery cabin filled with foam and soft sands. Both energy limited spall theory and Flaw limited approach showed accurate results compared with experimental data.

关 键 词：PELE lateral effect CORES natural fragments numerical simulation 

分 类 号：TJ410.6[兵器科学与技术—火炮、自动武器与弹药工程]