Journal of Jilin University(Engineering and Technology Edition) ›› 2025, Vol. 55 ›› Issue (7): 2286-2297.doi: 10.13229/j.cnki.jdxbgxb.20231100

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Mixed⁃mode mesoscale fracture behavior of concrete based on a phase field regularized cohesive zone model

Kang YAO1,2(),Qiao DONG1,2(),Xue-qin CHEN3,Bin SHI1,2,Shi-ao YAN1,2,Xiang WANG1,2   

  1. 1.School of Transportation，Southeast University，Nanjing 211189，China
    2.National Demonstration Center for Experimental Road and Traffic Engineering Education，Southeast University，Nanjing 211189，China
    3.School of Science，Nanjing University of Science and Technology，Nanjing 211189，China
  • Received:2023-10-14 Online:2025-07-01 Published:2025-09-12
  • Contact: Qiao DONG E-mail:yaokang0714@163.com;qiaodong@seu.edu.cn

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Abstract:

To study the mechanism of mix-mode fracture and damage evolution in concrete， and analyze the influence of the mesoscale structural properties， a phase field regularized cohesive zone model （PF-CZM） was used to perform numerical simulations. The results indicated that the PF-CZM can accurately model the mesoscale fracture behavior of concrete， which is independent from the phase field scale parameter and meshing size. In the process of mix-mode fracture， damage and cracking occur at the notch tip， leading to concrete softening， cracks to expand at an angle， and eventual failure. Reducing the aggregate volume content can improve the cracking resistance. Optimizing the interfacial properties also contributes to these improvements， but the effect is weaker compared to a decrease in aggregate volume fraction.

CLC Number: 

  • U416.214
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