摘要
运用单元内嵌不连续面的方法,研究类混凝土等脆性材料的第一类开裂问题,推导了该理论在三维模型中应用时的计算公式,包括开裂面的应力、位移以及合开裂面影响的节点的位移和应力。通过虚功原理建立了含开裂面影响的有限元计算模式,并通过算例证明了计算程序的正确性和理论的合理性。
To research the first kind of fracture modes in concrete solid, a new method with inner softening bands in element is adapted. The formulas needed in the three-dimensional model are deduced, including the stress and displacement on the fracture surface. The nodes with the effect of fracture are also discussed. Based on the virtual work principle, the equilibrium equations of FEM considering the effect of fracture are established. Numerical results are listed to demonstrate the accuracy of the program and the rationality of the proposed method.
出处
《岩石力学与工程学报》
EI
CAS
CSCD
北大核心
2003年第4期537-542,共6页
Chinese Journal of Rock Mechanics and Engineering
关键词
数值分析
虚裂纹
开裂面
内嵌软化面
有限元
Finite element method
Fracture
Numerical analysis
Stresses
Three dimensional
