准静态压缩下发射药床的运动形态与应力研究  

Study on motion morphology and stress of propellant bed under quasi-static compression

作　　者：张艳明[1] 罗兴柏[1] 刘国庆[1] 甄建伟[1] 陈言坤[1] 

机构地区：[1]军械工程学院,河北石家庄050003

出　　处：《传感器与微系统》2015年第5期44-47,共4页Transducer and Microsystem Technologies

摘　　要：为了研究粒状发射药床在准静态压缩条件下的运动形态和压缩过程中药床的应力变化,利用电子万能试验机对一定装填条件下的41 mm口径和51 mm口径药筒的药床进行了准静态压缩试验,并用录像机记录了41 mm口径发射药床的压缩过程。从记录的压缩过程来看,药床压缩过程主要经历了疏松到压实再到致密的过程;根据试验数据求得两药床的平均压缩模量分别为103.59,144.13 MPa;试验发现51 mm口径装填下的药床比41 mm口径装填下的药床在空隙变化率相同时应力更大;最后拟合得到了两药床的挤压应力随空隙率变化的曲线。In order to study motion morphology and stress change of propellant bed under quasi-static compression, electronic universal testing machine is used to implement a quasi-static compression test for propellant beds of cartridge 41 mm and 51 mm of caliber, compression process of 41 mm caliber cartridge is imaged by video recorder. The compression record shows that the compression process can be divided into three steps, they are porosity,compaction and densification;aecording to test datas,the compression modulus of two propellant bed is solved as 103.59 MPa and 144.13 MPa; stress of 51 mm propellant beds is larger than the 41 mm caliber propellant beds with same gap rate ; at last the curve of stress change with gap rate of two propellant beds is fitted.

关 键 词：发射药床 准静态压缩 运动形态 颗粒间应力 

分 类 号：TJ410.6[兵器科学与技术—火炮、自动武器与弹药工程]