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

Wenyuan Ren; Zhenjun Yang; Rajneesh Sharma; Ch Zhang; Philip J Withers

doi:doi:10.1016/j.engfracmech.2014.10.016

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

Wenyuan Ren, Zhenjun Yang, Rajneesh Sharma, Ch Zhang, Philip J Withers

Research output: Contribution to journal › Article › peer-review

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. (C) 2014 The Authors. Published by Elsevier Ltd.

Original language	English
Pages (from-to)	24-39
Number of pages	16
Journal	Engineering Fracture Mechanics
Volume	133
DOIs	https://doi.org/doi:10.1016/j.engfracmech.2014.10.016
Publication status	Published - 2015

Keywords

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

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doi:10.1016/j.engfracmech.2014.10.016

2 Finished

QUBE : Quasi-Brittle fracture: a 3-D experimentally-validated approach
Mummery, P., Jivkov, A. & Yang, Z.
1/10/12 → 30/09/15
Project: Research
XRADIA : High Resolution of 4D Imaging of Degradation and Self-repair Processes
Withers, P., Bailey, C. & Lee, P.
1/04/12 → 31/03/22
Project: Research

Cite this

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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. (C) 2014 The Authors. Published by Elsevier Ltd.",

keywords = "Concrete; X-ray Computed Tomography; Image based modelling; Meso-scale finite element model; Cohesive crack model",

author = "Wenyuan Ren and Zhenjun Yang and Rajneesh Sharma and Ch Zhang and Withers, {Philip J}",

note = "Times Cited: 0",

year = "2015",

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

language = "English",

volume = "133",

pages = "24--39",

journal = "Engineering Fracture Mechanics",

issn = "0013-7944",

publisher = "Elsevier BV",

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

AU - Ren, Wenyuan

AU - Yang, Zhenjun

AU - Sharma, Rajneesh

AU - Zhang, Ch

AU - Withers, Philip J

N1 - Times Cited: 0

PY - 2015

Y1 - 2015

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. (C) 2014 The Authors. Published by Elsevier Ltd.

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. (C) 2014 The Authors. Published by Elsevier Ltd.

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

U2 - doi:10.1016/j.engfracmech.2014.10.016

DO - doi:10.1016/j.engfracmech.2014.10.016

M3 - Article

VL - 133

SP - 24

EP - 39

JO - Engineering Fracture Mechanics

JF - Engineering Fracture Mechanics

SN - 0013-7944

ER -

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

Abstract

Keywords

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Projects

QUBE : Quasi-Brittle fracture: a 3-D experimentally-validated approach

XRADIA : High Resolution of 4D Imaging of Degradation and Self-repair Processes

Cite this