Abstract
The engineered cementitious composite (ECC) cracking process involves discontinuities. To solve this difficulty, a semi-discrete model for ECC based on peridynamics (PD) is established. In this paper, the pairwise force function is modified by using an improved damage coefficient. This model is established by modeling the matrix and the interactions between the fiber and matrix. The interactions between the fiber and matrix are applied to the material point in the form of forces. A reasonable horizon size and grid spacing ratio are obtained by analyzing the convergence of the ECC plate’s crack propagation. The validity of the PD model in this paper is demonstrated by comparing the uniaxial tensile simulation results of ECC plates with the relevant experimental results. Finally, the effects of pre-crack position and fiber volume fraction on dynamic fracture under an impact load are studied. This work helps to predict the crack propagation path of ECC structures which is important to guide engineering practice.
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