Two-dimensional X-ray CT image based meso-scale fracture modelling of concrete

被引：292

作者：

Ren, Wenyuan ^{[1
]}

Yang, Zhenjun ^{[1
,2
]}

Sharma, Rajneesh ^{[1
]}

Zhang, Ch ^{[3
]}

Withers, Philip J. ^{[4
]}

机构：

[1] Univ Manchester, Sch Mech Aerosp & Civil Engn, Manchester M13 9PL, Lancs, England

[2] Zhejiang Univ, Coll Civil Engn & Architecture, Hangzhou 310058, Zhejiang, Peoples R China

[3] Univ Siegen, Dept Civil Engn, D-57076 Siegen, Germany

[4] Univ Manchester, Sch Mat, Manchester Xray Imaging Facil, Manchester M13 9PL, Lancs, England

来源：

ENGINEERING FRACTURE MECHANICS | 2015年 / 133卷

基金：

英国工程与自然科学研究理事会;

关键词：

Concrete; X-ray Computed Tomography; Image based modelling; Meso-scale finite element model; Cohesive crack model; AUSTENITIC STAINLESS-STEEL; STRESS-CORROSION CRACKING; ASPHALT MIXTURE; ELEMENT; SIMULATION; HOMOGENIZATION; QUANTIFICATION; TOMOGRAPHY; COMPOSITES; MICROTOMOGRAPHY;

D O I：

10.1016/j.engfracmech.2014.10.016

中图分类号：

O3 [力学];

学科分类号：

08 ; 0801 ;

摘要：

Two-dimensional meso-scale finite element models with realistic aggregates, cement paste and voids of concrete are developed using microscale X-ray Computed Tomography images. Cohesive elements with traction-separation laws are pre-embedded within cement paste and aggregate-cement interfaces to simulate complex nonlinear fracture. Tension tests using a large number of images were simulated with statistical analysis. The very different load-carrying capacities and crack patterns demonstrate the effects of random distribution of phases. It is found that the tensile strength decreases as the void fraction increases, and the relative strength of cement paste and interfaces dominates the microcracking behaviour, which in turn affects macrocracking and load-carrying capacity. (C) 2014 The Authors. Published by Elsevier Ltd.

引用

页码：24 / 39

页数：16

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