摘要
根据混凝土材料动态响应的特点,将常规弹速范围内混凝土球形空腔的动态响应区域划分为弹性区、开裂区和孔隙压实区,孔隙压实区的混凝土材料采用两段式线性状态方程和考虑拉伸破坏的Mohr-Coulomb屈服准则描述。运用相似变换方法推导了球形空腔动态膨胀响应的理论表达式,采用Runge-Kutta-Felhberg数值方法给出了球形空腔动态响应的数值解。结果表明,运用该理论建立的侵彻模型与试验结果具有良好的一致性。
Based on the dynamic response characteristic of concrete,the dynamic response of spherical cavity expansion for conventional projectile velocity is divided into three regions,i.e.elastic,cracked and voids compacted regions.The constitutive description of voids compacted region idealized pressure-volumetric strain as bilinear compressible and idealized shear strength pressure as Mohr-Coulomb criterion with a tension cutoff.The dynamic response expression of spherical cavity expansion is derived by similarity methods;and the dynamic response numerical solution is given by Runge-Kutta-Felbberg numerical method.The results show that the predictions from the penetration model based on the theory are consistent with experiment data.
出处
《岩土力学》
EI
CAS
CSCD
北大核心
2010年第5期1481-1485,共5页
Rock and Soil Mechanics
关键词
球形空腔膨胀理论
混凝土
孔隙压实效应
侵彻
spherical cavity expansion theory
concrete
voids compacted effects
penetration
