Predicting the electromechanical properties of small caliber projectile impact igniter using PZT dynamic damage constitutive model considering crack propagation  

作　　者：Rui-zhi Wang Zhi-qiang Wang En-ling Tang Lei Li Guo-lai Yang Chun Cheng Li-ping He Ya-fei Han 

机构地区：[1]Key Laboratory of Transient Physical Mechanics and Energy Conversion Materials of Liaoning Province,Shenyang Ligong University,Shenyang,110159,Liaoning,China [2]School of Mechanical Engineering,Nanjing University of Science and Technology,Nanjing,210094,Jiangsu,China [3]Key Laboratory of Impact and Safety Engineering,Ministry of Education,Ningbo University,Ningbo,315211,Zhejiang,China

出　　处：《Defence Technology（防务技术）》2023年第10期121-135,共15页Defence Technology

基　　金：supported by the National Natural Science Foundation of China(Grant No.12172232);the project of Key Laboratory of Impact and Safety Engineering(Ningbo University,China);Ministry of Education(CJ202206);supported by the scientific research support plan of introducing high-level talents from Shenyang Ligong University。

摘　　要：Block piezoelectric ceramics(PZTs)are often used in impact igniters to provide activation energy for electric initiators.Under the action of strong impact stress,PZTs release electric energy accompanied by crack initiation,propagation and crushing.At present,the electrical output performance of PZTs in projectile is usually calculated by quasi-static piezoelectric equation without considering the dynamic effect caused by strong impact and the influence of crack propagation on material properties.So the ignition parameters are always not accurately predicted.To tackle this,a PZT dynamic damage constitutive model considering crack propagation is established based on the dynamic impact test and the crack propagation theory of brittle materials.The model is then embedded into the ABAQUS subroutine and used to simulate the electromechanical response of the impact igniter during the impact of a small caliber projectile on the target.Meanwhile,the experiments of projectile with impact igniter impact on the target are carried out.The comparison between experimental and numerical simulation results show that the established dynamic damage model can effectively predict the dynamic electromechanical response of PZTs in the missile service environment.

关 键 词：Piezoelectric ceramics IMPACT IGNITER Dynamic damage constitutive model Electromechanical response 

分 类 号：TJ413[兵器科学与技术—火炮、自动武器与弹药工程]