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

W. Ren; Zhenjun Yang; R. Sharma; C. Zhang; P. J. Withers

doi:10.1016/j.engfracmech.2014.10.016

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

W. Ren, Zhenjun Yang, R. Sharma, C. Zhang, P. J. Withers

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Abstract

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.

Original language	English
Pages (from-to)	24-39
Journal	Engineering Fracture Mechanics
Volume	133
Early online date	16 Oct 2014
DOIs	https://doi.org/10.1016/j.engfracmech.2014.10.016
Publication status	Published - Jan 2015
Externally published	Yes

Bibliographical note

Open Access funded by Engineering and Physical Sciences Research Council
Under a Creative Commons license

Keywords

Concrete
X-ray Computed Tomography
Image based modelling
Meso-scale finite element model
Cohesive crack model

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10.1016/j.engfracmech.2014.10.016Licence: CC BY

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title = "Two-dimensional X-ray CT image based meso-scale fracture modelling of concrete",

abstract = "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. ",

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author = "W. Ren and Zhenjun Yang and R. Sharma and C. Zhang and Withers, {P. J.}",

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doi = "10.1016/j.engfracmech.2014.10.016",

language = "English",

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journal = "Engineering Fracture Mechanics",

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T1 - Two-dimensional X-ray CT image based meso-scale fracture modelling of concrete

AU - Ren, W.

AU - Yang, Zhenjun

AU - Sharma, R.

AU - Zhang, C.

AU - Withers, P. J.

N1 - Open Access funded by Engineering and Physical Sciences Research Council Under a Creative Commons license

PY - 2015/1

Y1 - 2015/1

N2 - 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.

AB - 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.

KW - Concrete

KW - X-ray Computed Tomography

KW - Image based modelling

KW - Meso-scale finite element model

KW - Cohesive crack model

U2 - 10.1016/j.engfracmech.2014.10.016

DO - 10.1016/j.engfracmech.2014.10.016

M3 - Article

SN - 0013-7944

VL - 133

SP - 24

EP - 39

JO - Engineering Fracture Mechanics

JF - Engineering Fracture Mechanics

ER -

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

Abstract

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Keywords

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