钢筋混凝土靶侵彻过程中空腔膨胀响应分区研究  

Study on the cavity expansion response of the concrete target under penetration

作　　者：邓勇军 陈小伟[3] 姚勇 DENG YongJun;CHEN XiaoWei;YAO Yong(Shock and Vibration of Engineering Materials ami Structures Key Laboratory of Sichuan Province,Mianyang 621000,China;School of Civil Engineering and Architecture,Southwest University of Science and Technology,Mianyang 621000,China;Advanced Research Institute for Multidisciplinary Science,Beijing Institute of Technology,Beijing 100081,China)

机构地区：[1]工程材料与结构冲击振动四川省重点实验室,绵阳621000 [2]西南科技大学土木工程与建筑学院,绵阳621000 [3]北京理工大学前沿交叉科学研究院,北京100081

出　　处：《中国科学：物理学、力学、天文学》2020年第2期30-47,共18页Scientia Sinica Physica,Mechanica & Astronomica

基　　金：国家自然科学基金重大项目(编号:11390361,11390362)资助

摘　　要：本文以钢筋混凝土动态空腔膨胀理论模型为基础,分析了体积配筋率及混凝土强度对各分区界面速度的影响;提出了侵彻过程中不同速度下,混凝土破裂区、粉碎区区域大小的计算方法,并讨论了配筋率、混凝土强度对各区域大小的影响,得到了侵彻过程中混凝损伤区域的变化规律.利用LS-DYNA有限元软件对钢筋混凝土靶侵彻过程进行了数值模拟,提出以混凝土极限压应变和极限拉应变两阈值为依据,对混凝土靶空腔膨胀响应区域进行识别划分,得到了侵彻过程中混凝土各响应区的区域大小;分析了配筋率、网眼间距等参数对混凝土各响应区域大小的影响.Based on the theoretical model of dynamic cavity-expansion of reinforced concrete,the effect of volume reinforcement ratio and concrete strength on interfacial velocity of each region was analyzed.The method for calculating the size of cracked region and crushed region under different velocities was proposed,and the influences of the reinforcement ratio and the concrete strength on the size of each region were discussed.Further the variation law of damage region was obtained.In addition,with the LS-DYNA,the threshold values of concrete,ultimate compressive strain and ultimate tensile strain,were used to identify and divide the expansion response region of concrete target cavity.And the sizes of concrete response region are obtained.Moreover,the influence of reinforcement ratio,mesh spacing and other parameters on the size of each response region was analyzed.

关 键 词：钢筋混凝土 动态空腔膨胀理论 分区方法 约束效应 配筋率 

分 类 号：TJ06[兵器科学与技术—兵器发射理论与技术]