Numerical Simulation of Fracture Process of Three-Point Bending Beam of Concrete Based on Modified Mazars Model

Abstract:

Taking into account the initial damage and the accumulation of damage of concrete, Mazars damage model was modified. Based on the modified Mazars damage model, combined with finite element software ANSYS, the fracture failure process of the three-point bending notched beam of concrete was simulated. The initiation load P_ini and maximum load P_max of the three-point bending beam were determined with the damage criterion, and the full relation curve of the load P versus the loading point displacement Δ of the fracture failure process of the three-point bending beam was obtained. The results show that the method of numerical simulation of concrete fracture failure process is feasible, and based on the initiation load of the crack determined by numerical simulation, the initiation toughness of the beam can be easily calculated, and the problem of calculation of the initiation toughness caused by the initiation load can not be accurately determined in the actual experiment is resolved.

• Periodical: Advanced Materials Research (Volumes 295-297)
• Pages: 2097-2101
• DOI: https://doi.org/10.4028/www.scientific.net/AMR.295-297.2097
• Online since: July 2011
• Authors: Ai Min Deng, Lian Meng Gou, Dao Yuan Xu
• Keywords: Concrete, Damage Model, Fracture Failure, Numerical Simulation, Three-Point Bending Beam

References

[1] Faning Dang, Wei Tian, Wentao Han, Houqun Chen. Journal of Hydraulic Engineering, Vol. 37(2006),pp.674-680

[2] Wancheng Zhu, Tiange Lin. Rock and Soil Mechanics,Vol.23(2002),pp.147-151

[3] Yunjun Li. The Numerical Simulation of the Concrete Damage based on the Non-local Damage Model[D],Hefei: Hefei University of Technology,2006,pp.24-26

[4] Xiangdong Wang, Daoyuan Xu, Weixuan Zhu. Journal of Northern Jiaotong University, Vol.27(2003),pp.32-35

[5] Xiaozhou Xia. The Meso Numerical Simulation and the Macro-meso Mechanics Research for Concrete Material[D], Nanjing:HoHai University,2007,pp.54-56

[6] Lanhao Zhao, Tongchun Li, Tianyou Yan. Engineering Mechanics, Vol. 27(2010),pp.60-67