应变率相关的混凝土连续损伤本构模型  

A Rate-dependent Continuum Damage Constitutive Model for Concrete

作　　者：齐振伟[1] 蔡清裕[2] 杨涛[1] 

机构地区：[1]国防科学技术大学航天与材料工程学院,长沙410073 [2]国防科学技术大学理学院,长沙410073

出　　处：《弹道学报》2007年第4期55-58,62,共5页Journal of Ballistics

摘　　要：针对混凝土在爆炸和高速撞击、侵彻等典型动态加载下的响应问题,在开发动态本构模型方面做了相应研究,自行开发了适合描述混凝土大变形、高应变率、高压加载响应的计算本构模型———混凝土率相关连续损伤模型(RDCDMC),并将其引入三维动力有限元程序LS-DYNA.模型在考虑混凝土的损伤(包括拉、压损伤)、应变率效应及破坏模式的完备性方面有所进步.模型的可行性和有效性在相关的数值模拟工作中得到了检验.Aiming at the dynamic response characteristics of concrete under such prevailing dynamic loading as explosion, high velocity impacting and penetration, some progress in developing a new dynamic constitutive model was presented. A new concrete constitutive model, Rate-De- pendent Continuum Damage Model for Concrete （RDCDMC）, was independently developed which is suitable for describing concrete under large deformation, high strain rate, high pressure loading. The model was coded into LS-DYNA, a 3D dynamic FE code. RDCDMC has advantage for categoricalness in considering the damage including tension and compression, strain-rate-de- pendence, and failure mode. The feasibility and validity of RDCDMC were evaluated by some numerical simulation research.

关 键 词：混凝土 应变率相关 连续损伤 本构模型 

分 类 号：O383[理学—流体力学] O313.4[理学—力学]