Dynamic Fracture Simulation of Functionally Graded Engineered Cementitious Composite Structures Based on Peridynamics

被引：5

作者：

Cheng, Zhanqi ^{[1
]}

Wu, You ^{[1
]}

Chu, Liusheng ^{[1
]}

Tang, Jiyu ^{[1
]}

Yuan, Chengfang ^{[1
]}

Feng, Hu ^{[1
]}

机构：

[1] Zhengzhou Univ, Sch Civil Engn, Zhengzhou 450001, Peoples R China

来源：

ACTA MECHANICA SOLIDA SINICA | 2022年 / 35卷 / 01期

关键词：

Peridynamics; Functionally graded ECC structures; Semi-discrete models; Dynamic fracture; BEHAVIOR; MODEL; PROPAGATION; CONCRETE;

D O I：

10.1007/s10338-021-00251-x

中图分类号：

T [工业技术];

学科分类号：

08 ;

摘要：

In this paper, a semi-discrete model based on peridynamics (PD) for engineered cementitious composites (ECCs) is applied to simulate the fracture behavior of functionally graded ECC (FGECC) beams. This is a new application of PD in ECC. Prior to simulating the crack behavior, the convergence of the PD model for ECC is discussed and the appropriate horizon size delta and nonlocal ratio m are obtained, i.e., delta = 1.6 nun and m = 4. In addition, when the bond strain exceeds the elastic limit, delta damage variable is introduced into the model, and the model is validated using a simple numerical algorithm. Finally, the dynamic fracture behavior of a two-dimensional FGECC beam under four-point bending is investigated, and the effect of the initial crack location on the fracture behavior is analyzed. Simulation results show that the initial crack location can affect the crack propagation pattern, thereby enabling one to understand the dynamic fracture behavior of ECC structures and guide the engineering practice.

引用

页码：79 / 89

页数：11

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