Simulation of rate dependent fracture in concrete using an irregular lattice model

Kunhwi Kim, Yun Mook Lim

Research output: Contribution to journalArticle

20 Citations (Scopus)

Abstract

An irregular lattice model is used to simulate concrete fracture behavior under dynamic loadings. The numerical approach is based on rigid-body-spring networks, in which a visco-plastic damage model is applied to describe the rate dependency. A direct tensile test is simulated at various strain rates, and the dynamic strength increase is obtained in terms of dynamic increase factor (DIF). The DIFs are compared with a previous experimental and empirical study to calibrate the visco-plastic parameters. Next, a three-point-bending test is conducted numerically under impact and slow loadings, where the mixed-mode fracture is set up with a notch offset from the midspan. The rate-sensitive failure features are shown at the two different loading rates, and the rate effect on the failure mechanism is related with the peak load in the loading history. This study provides qualitative and quantitative understandings of the rate dependent failure behaviors in concrete.

Original languageEnglish
Pages (from-to)949-955
Number of pages7
JournalCement and Concrete Composites
Volume33
Issue number9
DOIs
Publication statusPublished - 2011 Oct 1

Fingerprint

Concretes
Plastics
Bending tests
Strain rate

All Science Journal Classification (ASJC) codes

  • Building and Construction
  • Materials Science(all)

Cite this

@article{9709e92ac2774be7b6d3771db3d2f05a,
title = "Simulation of rate dependent fracture in concrete using an irregular lattice model",
abstract = "An irregular lattice model is used to simulate concrete fracture behavior under dynamic loadings. The numerical approach is based on rigid-body-spring networks, in which a visco-plastic damage model is applied to describe the rate dependency. A direct tensile test is simulated at various strain rates, and the dynamic strength increase is obtained in terms of dynamic increase factor (DIF). The DIFs are compared with a previous experimental and empirical study to calibrate the visco-plastic parameters. Next, a three-point-bending test is conducted numerically under impact and slow loadings, where the mixed-mode fracture is set up with a notch offset from the midspan. The rate-sensitive failure features are shown at the two different loading rates, and the rate effect on the failure mechanism is related with the peak load in the loading history. This study provides qualitative and quantitative understandings of the rate dependent failure behaviors in concrete.",
author = "Kunhwi Kim and Lim, {Yun Mook}",
year = "2011",
month = "10",
day = "1",
doi = "10.1016/j.cemconcomp.2011.01.002",
language = "English",
volume = "33",
pages = "949--955",
journal = "Cement and Concrete Composites",
issn = "0958-9465",
publisher = "Elsevier Limited",
number = "9",

}

Simulation of rate dependent fracture in concrete using an irregular lattice model. / Kim, Kunhwi; Lim, Yun Mook.

In: Cement and Concrete Composites, Vol. 33, No. 9, 01.10.2011, p. 949-955.

Research output: Contribution to journalArticle

TY - JOUR

T1 - Simulation of rate dependent fracture in concrete using an irregular lattice model

AU - Kim, Kunhwi

AU - Lim, Yun Mook

PY - 2011/10/1

Y1 - 2011/10/1

N2 - An irregular lattice model is used to simulate concrete fracture behavior under dynamic loadings. The numerical approach is based on rigid-body-spring networks, in which a visco-plastic damage model is applied to describe the rate dependency. A direct tensile test is simulated at various strain rates, and the dynamic strength increase is obtained in terms of dynamic increase factor (DIF). The DIFs are compared with a previous experimental and empirical study to calibrate the visco-plastic parameters. Next, a three-point-bending test is conducted numerically under impact and slow loadings, where the mixed-mode fracture is set up with a notch offset from the midspan. The rate-sensitive failure features are shown at the two different loading rates, and the rate effect on the failure mechanism is related with the peak load in the loading history. This study provides qualitative and quantitative understandings of the rate dependent failure behaviors in concrete.

AB - An irregular lattice model is used to simulate concrete fracture behavior under dynamic loadings. The numerical approach is based on rigid-body-spring networks, in which a visco-plastic damage model is applied to describe the rate dependency. A direct tensile test is simulated at various strain rates, and the dynamic strength increase is obtained in terms of dynamic increase factor (DIF). The DIFs are compared with a previous experimental and empirical study to calibrate the visco-plastic parameters. Next, a three-point-bending test is conducted numerically under impact and slow loadings, where the mixed-mode fracture is set up with a notch offset from the midspan. The rate-sensitive failure features are shown at the two different loading rates, and the rate effect on the failure mechanism is related with the peak load in the loading history. This study provides qualitative and quantitative understandings of the rate dependent failure behaviors in concrete.

UR - http://www.scopus.com/inward/record.url?scp=80052966547&partnerID=8YFLogxK

UR - http://www.scopus.com/inward/citedby.url?scp=80052966547&partnerID=8YFLogxK

U2 - 10.1016/j.cemconcomp.2011.01.002

DO - 10.1016/j.cemconcomp.2011.01.002

M3 - Article

VL - 33

SP - 949

EP - 955

JO - Cement and Concrete Composites

JF - Cement and Concrete Composites

SN - 0958-9465

IS - 9

ER -