Modeling Mixed Mode Fracture of Concrete by Using the Combined Discrete and Finite Elements Method
Modeling Mixed Mode Fracture of Concrete by Using the Combined Discrete and Finite Elements Method
复制标题
DOI：
10.1142/s0219876216500079
复制
发表时间：
2016-02
影响因子：
1.7
通讯作者：
W. Xu;M. Zang;J. Sakamoto
中科院分区：
文献类型：
--
作者：
W. Xu;M. Zang;J. Sakamoto
用四点离散和有限元相结合的方法研究了混凝土的混合型断裂问题。潜在破裂区用离散单元(DES)模拟，另一区用有限元(FES)模拟。粘结断裂模型仅用于模拟DE子区的脆性断裂。通过一个简单的算例，对粘结断裂模型在DE作用下的网格尺寸无关性进行了详细的研究。随后，对两个简单混凝土试件的混合型断裂行为进行了模拟，模拟结果与其他模拟结果和试验结果吻合较好。
The mixed mode (I/II) fracture of concrete is investigated by using a four-point combined discrete and finite elements method. The potential fracture zone is simulated by the discrete elements (DEs) and the other zone by the finite elements (FEs). A cohesive fracture model is employed to simulate the brittle fracture only in the DE subregion. Mesh-size independency of the cohesive fracture model subjected to the DE is carefully investigated with a simple case. Subsequently, the mixed mode fracture behaviors of two simple concrete specimens are simulated and the simulation results achieve good agreements with the other simulations and experimental results.