The dynamic response of a high-density polyethylene slow-release structure under launching overload  

作　　者：Ke-Bin Zhang Wen-Bin Li Yu Zheng Wen-Jin Yao Chang-Fang Zhao 

机构地区：[1]School of Mechanical Engineering,Nanjing University of Science and Technology,Nanjing,210094,China

出　　处：《Defence Technology（防务技术）》2023年第8期143-156,共14页Defence Technology

摘　　要：Based on the 60 mm artillery grenade,a slow-release structure was designed to reduce the severity of ammunitions response to accidental thermal stimulation and improve the thermal stability of ammunitions.The slow-release structure was made of high-density polyethylene(HDPE) and connected the fuse and the projectile body through internal and external threads.To study the safety of the slowrelease structure under artillery launching overload,mechanical analysis of the slow-release structure was simulated via finite element analysis(FEA).The impacts of various factors(e.g.,fuse mass,number of threads,and nominal diameter of internal threads of the slow-release structure) on the connection strength of the slow-release structure were studied.A strength-prediction model based on the fuse mass and internal thread parameters was established by fitting the maximum effective stress of the slowrelease structure.This led to good prediction results.In conclusion,this study provides references and theoretical support for the design of thermal protection structures insensitive to ammunition.

关 键 词：Artillery ammunition HDPE Finite element analysis Slow-release structure Threaded connection 

分 类 号：TJ410[兵器科学与技术—火炮、自动武器与弹药工程]