弹体冲击混凝土局部破坏特征数值模拟  

Numerical Simulation of Concrete Partial Destruction Characteristics Under Projectile Perforation

作　　者：徐懿[1] 余晓琦[1,2] 王起帆[1] 李灿良 

机构地区：[1]后勤工程学院军事土木工程系,重庆401311 [2]西北核技术研究所,西安710024 [3]海南省军区187医院,海口570100

出　　处：《后勤工程学院学报》2013年第2期15-20,共6页Journal of Logistical Engineering University

基　　金：总后勤部基建营房部项目(BY211C015)

摘　　要：为研究弹体冲击混凝土构件形成的局部破坏特征,基于ANSYS/LS DYNA软件模拟了弹体以4种速度冲击混凝土的情况,采用Holmquist Johnson Cook(HJC)模型和以抗拉破坏为准则的单元失效较好地反映了混凝土在不同弹体速度时的正面成坑、背面震塌及裂纹发展等现象,并对各个冲击过程进行了分析。数值模拟结果与理论分析结果吻合,符合人们对弹体冲击混凝土局部破坏特征的一般认识。In order to study the partial destruction characteristics of the concrete which is impacted from the projectile perforation, software ANSYS/LS-DYNA is used to simulate the concrete perforated by the projectile with 4 velocities, and the Holmquist- Johnson-Cook model and the unit failure following tensile failure guideline are applied to discover the crater formation in the front surface, the spallation of the back surface and the crack development phenomenon, etc, well in different speeds. This paper also ana- lyzes the destruction characteristics of concrete in every impact process. The simulation result is in accordance with theoretical analysis result, which meets the general awareness of the partial destruction characteristics of concrete under projectile perforation.

关 键 词：弹体冲击 局部破坏 HJC模型 混凝土 

分 类 号：O389[理学—流体力学] TJ414.3[理学—力学]