CAJ | 학술논문

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.
위연구탄체충격혼응토구건형성적국부파배특정,기우ANSYS/LS?DYNA연건모의료탄체이4충속도충격혼응토적정황,채용Holmquist?Johnson?Cook(HJC)모형화이항랍파배위준칙적단원실효교호지반영료혼응토재불동탄체속도시적정면성갱、배면진탑급렬문발전등현상,병대각개충격과정진행료분석.수치모의결과여이론분석결과문합,부합인문대탄체충격혼응토국부파배특정적일반인식.
In order to study the partial destruction characteristics of the concrete which is impacted from the projectile perfora?tion,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 anal?ysis result,which meets the general awareness of the partial destruction characteristics of concrete under projectile perforation.