摘要
本文用有限差分法于虚拟裂缝模型,分析了混凝土三点弯曲切口梁中裂缝的扩展至断裂的全过程。所得的结果与有限元法和实验结果吻合较好,表明该法是混凝土断裂力学研究的有效数值方法之一。文中分析了不同的几何尺寸、材料参数对混凝土断裂能G_f的影响,可供实验测定断裂能数据分析时参考。
An application of the finite difference method to the propagating crack and fracture problems in the three point bending specimen of concrete is presented on the basis of the fictitious crack model. The results are in good agreement with the finite element method and the experimental results. It is shown that the finite difference analysis is one of the useful methods for the research of fracture mechanics. The influence of specimen geometric size and material parameters on concrete fracture is investigated and it is able to provide a useful reference standard for experimental analysis.
基金
水利水电科学基金
关键词
混凝土
断裂力学
有限差分法
finite difference method
fictitious crack
fracture mechanics
concrete
