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含粘结剂的非均质凝聚炸药细观数值模拟

发表时间:2014-08-15  浏览量:1554  下载量:621
全部作者: 浣石,陶为俊
作者单位: 广州大学土木工程防护研究中心
摘 要: 球壳塌缩热点形成机制被认为是非均质凝聚炸药在冲击波作用下的主要机制。研究采用LS-DYNA软件,对冲击作用下非均质凝聚炸药颗粒进行细观数值模拟。计算结果表明:冲击波在颗粒中2次反射后塑性应变迅速增大,靠近孔隙位置升高最快,外半径升高最慢;粘结剂有效地延长了初始阶段炸药的升温时间。
关 键 词: 爆炸力学;炸药颗粒;细观;数值模拟;孔隙
Title: Meso-level numerical simulation of heterogeneous condensed explosive with binder
Author: HUAN Shi, TAO Weijun
Organization: Civil Engineering Protection Research Center, Guangzhou University
Abstract: Pore-collapse hot-spot mechanism is considered the main mechanism of shock initiation. Based on LS-DYNA program, the meso-level numerical simulation was carried out on the heterogeneous condensed explosives under impact. The numerical simulation showed that the effective plastic strain at the pore radii raised rapidly after two reflections, but the outer radii raised slowly. And the binder effectively extended the hot-spot formation time of the initial stage.
Key words: explosion mechanics; explosive particle; meso-level; numerical simulation; pore
发表期数: 2014年8月第15期
引用格式: 浣石,陶为俊. 含粘结剂的非均质凝聚炸药细观数值模拟[J]. 中国科技论文在线精品论文,2014,7(15):1519-1524.
 
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