炸药切削过程中切削力的数值模拟方法研究  

The Research of Cutting Force Simulation in the Course of Explosive Cutting

作　　者：何铁宁[1] 成伟[2] 康宗礼[2] 

机构地区：[1]北京理工大学机电工程学院,北京100081 [2]中国工程物理研究院计算机应用研究所,四川绵阳621900

出　　处：《火工品》2005年第3期22-25,29,共5页Initiators & Pyrotechnics

基　　金：中国工程物理研究院重大基金资助(2001Z0301)。

摘　　要：PBX炸药在武器中有广泛的应用,由于其钝感性,可以通过机械加工的手段将其加工成所需形状;但是,从保证炸药车削加工安全的角度出发,研究炸药切削加工过程中力的大小与分布十分重要,本文根据PBX炸药材料的力学性能实验和切削实验的结果,采用有限元显式侵彻算法,研究适合炸药材料特点的弹塑性本构关系和等效应力的失效准则,模拟炸药切削过程;利用干切实验的结果,对数值模拟模型进行了修正和完善,切削合力的计算曲线与实验结果比较接近,随不同切削参数的变化趋势与实验基本一致,从而证明了此模拟方法是可行的。The PBX explosive is applied in weapon engineering widely. Because of its lower sensitivity, it can be formed by machining. However, considering the safety of explosive cutting, it is important to know the cutting force of work piece and cutting tool. This paper describes how to simulate the cutting force problem in the course of explosive cutting using FEA explicit eroding method. The researches include the numerical algorithm, the finite element model, and constitutive model and failure mode of material etc. According to the results of axial parts cutting experiment, which is compared with the cutting force numerical simulation, this method is proved to be feasible.

关 键 词：PBX炸药 切削数值模拟 有限元显式侵彻算法 

分 类 号：TQ564[化学工程—炸药化工]