基于EFG方法的PBX炸药圆弧巴西实验的数值模拟  

Numerical Simulation of PBX under Circular Anvil Brazilian Test Based on EFG Method

作　　者：崔云霄[1,2] 陈鹏万[1] 戴开达[1] 王雷元[2] 刘龑龙 

机构地区：[1]北京理工大学爆炸科学与技术国家重点实验室,北京100081 [2]西北核技术研究所,陕西西安710024

出　　处：《火炸药学报》2016年第1期34-38,共5页Chinese Journal of Explosives & Propellants

基　　金：国家自然科学基金资助(No.11202027;No.11221202;No.U1330202)

摘　　要：为了对准静态圆弧巴西实验过程中PBX试样的裂纹形成和扩展过程进行模拟,基于EFG方法和内聚力模型,利用LS-DYNA软件的隐式分析模拟计算了实验过程。结果表明,计算结果和文献报道的实验结果吻合较好,证明了该方法的可行性;采用线性内聚力模型可较好地描述PBX炸药的断裂过程,PBX试样的起裂发生在压缩载荷达到峰值后,随着压头的进一步压缩,试样中心的裂纹沿直径向压头方向扩展。To simulate the crack formation and extension process of PBX sample in the quasi-static circular anvil Brazilian test,based on EFG method and cohesive model,the experimental process was calculated by implicit analysis and simulation of LS-DYNA software.The results show that the calculated results are in good agreement with reported experimental ones in literature,proving the feasibility of the method.The fracture process of PBX can be well described by linear cohesive model.The crack initiation of PBX sample occurs after the compression load reaches the peak value,and with the further compression of compression anvil,the crack of the specimen center extends along the diameter direction to the anvil.

关 键 词：固体力学 圆弧巴西实验 EFG方法 内聚力模型 PBX LS-DYNA软件 

分 类 号：TJ55[兵器科学与技术—军事化学与烟火技术] O346[理学—固体力学]