摘要
采用LS-DYNA有限元软件对钢筋混凝土靶动态空腔膨胀物理过程进行了数值模拟。获得了不同配筋率下,混凝土空腔边界的膨胀压力与膨胀速度的关系,以及不同空腔膨胀压力下混凝土中某时刻的径向应力场分布,探讨了钢筋对混凝土动态空腔膨胀过程的影响。结果表明:钢筋的存在有效约束了周围混凝土,减小了混凝土各区域大小,同时降低了混凝土空腔边界的膨胀速度。
In this paper,LS-DYNA finite element software is used to simulate the dynamic cavity expansion process of reinforced concrete targets.For different reinforcement ratios,the relationship between the expansion pressure and the expansion velocity at the concrete cavity boundary,and the distribution of radial stress at a certain moment are obtained.Then the influences of reinforcement ratios on the dynamic cavity expansion process are investigated.It is found that the reinforcing bars effectively restrain the surrounding concrete,reduce the size of each region of the concrete,and decline the expansion speed of the concrete cavity boundary.
作者
邓勇军
刘洋村
姚勇
DENG Yongjun;LIU Yangcun;YAO Yong(Shock and Vibration of Engineering Materials and Structures Key Laboratory of Sichuan Province,Sichuan Mianyang 621000,China;School of Civil Engineering and Architecture,Southwest University of Science and Technology,Sichuan Mianyang 621000,China)
出处
《弹箭与制导学报》
北大核心
2021年第2期72-77,共6页
Journal of Projectiles,Rockets,Missiles and Guidance
基金
国家自然科学基金(11872118)
西南科技大学博士基金(19zx7154)资助。
关键词
钢筋混凝土
空腔膨胀
约束效应
数值模拟
reinforced concrete
cavity expansion
confinement effect
numerical simulation
