A three-dimensional meso-scale modelling of concrete fracture, based on cohesive elements and X-ray μCT images

被引：119

作者：

Trawinski, W. ^{[1
]}

Tejchman, J. ^{[1
]}

Bobinski, J. ^{[1
]}

机构：

[1] Gdansk Univ Technol, Fac Civil & Environm Engn, PL-80233 Gdansk, Poland

来源：

ENGINEERING FRACTURE MECHANICS | 2018年 / 189卷

关键词：

Cohesive elements; Concrete beam; Fracture; Interfacial transitional zones; 3D meso-scale approach; FEM; X-ray mu CT; QUASI-BRITTLE MATERIALS; AGGREGATE LEVEL; CEMENT PASTE; DAMAGE; SIMULATIONS; MICROMECHANICS; PROPAGATION; ELASTICITY; PLASTICITY; STRENGTH;

D O I：

10.1016/j.engfracmech.2017.10.003

中图分类号：

O3 [力学];

学科分类号：

08 ; 0801 ;

摘要：

The paper shows three-dimensional numerical results regarding concrete fracture at aggregate level in a notched concrete beam under bending using cohesive interface elements. Concrete heterogeneity was taken into account by considering a 3-phase material description: aggregate, cement matrix and interfacial transitional zones (ITZs). The real shape and location of aggregate particles in concrete were assumed in numerical analyses based on Xray mu CT scans. The 3D meso-scale finite element method (FEM) with cohesive elements embedded in the cement matrix and ITZs was used in simulations. The effect of different properties of ITZs and cement matrix was investigated in parametric studies. A satisfactory agreement in terms of the vertical force versus crack mouth opening displacement evolution and crack geometry was achieved between analyses and laboratory tests. (C) 2017 Elsevier Ltd. All rights reserved.

引用

页码：27 / 50

页数：24

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