Loading-rate dependence of mode I crack growth in concrete

Minhua Ma, Zhimin Wu, Xiaozhi Hu, Rena C. Yu, Xiaodong Fei

Research output: Contribution to journalArticle

Abstract

Mode I crack propagation process of concrete under relatively low loading rates which cover four orders of magnitude (0.2 μm/s to 2.0 mm/s) is investigated with three-point bending (TPB) beams. All measured material properties exhibit rate sensitivity and follow a log-linear relationship with the loading rate. A rate-sensitive softening curve is established. The complete load-crack mouth opening displacement (P-CMOD) curve, crack propagation length, and fracture process zone (FPZ) length are simulated based on crack growth criterion with the fitted material parameters under those loading rates. Results show that the simulated P-CMOD curves agree well with those of experimental measurements. It is clear that the peak load increases with the loading rate and so is the critical crack mouth opening displacement. Moreover, under the same load level, the length of the FPZ and the cohesive stress at the initial crack tip also increase with the increasing loading rate.

Original languageEnglish
JournalFatigue and Fracture of Engineering Materials and Structures
DOIs
Publication statusE-pub ahead of print - 2 Dec 2019

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Crack propagation
Concretes
Cracks
Crack tips
Materials properties

Cite this

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title = "Loading-rate dependence of mode I crack growth in concrete",
abstract = "Mode I crack propagation process of concrete under relatively low loading rates which cover four orders of magnitude (0.2 μm/s to 2.0 mm/s) is investigated with three-point bending (TPB) beams. All measured material properties exhibit rate sensitivity and follow a log-linear relationship with the loading rate. A rate-sensitive softening curve is established. The complete load-crack mouth opening displacement (P-CMOD) curve, crack propagation length, and fracture process zone (FPZ) length are simulated based on crack growth criterion with the fitted material parameters under those loading rates. Results show that the simulated P-CMOD curves agree well with those of experimental measurements. It is clear that the peak load increases with the loading rate and so is the critical crack mouth opening displacement. Moreover, under the same load level, the length of the FPZ and the cohesive stress at the initial crack tip also increase with the increasing loading rate.",
keywords = "crack growth process, crack propagation criterion of concrete, loading-rate dependence, rate-dependent cohesive law",
author = "Minhua Ma and Zhimin Wu and Xiaozhi Hu and Yu, {Rena C.} and Xiaodong Fei",
year = "2019",
month = "12",
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doi = "10.1111/ffe.13174",
language = "English",
journal = "Fatigue & Fracture of Engineering Materials and Structures",
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Loading-rate dependence of mode I crack growth in concrete. / Ma, Minhua; Wu, Zhimin; Hu, Xiaozhi; Yu, Rena C.; Fei, Xiaodong.

In: Fatigue and Fracture of Engineering Materials and Structures, 02.12.2019.

Research output: Contribution to journalArticle

TY - JOUR

T1 - Loading-rate dependence of mode I crack growth in concrete

AU - Ma, Minhua

AU - Wu, Zhimin

AU - Hu, Xiaozhi

AU - Yu, Rena C.

AU - Fei, Xiaodong

PY - 2019/12/2

Y1 - 2019/12/2

N2 - Mode I crack propagation process of concrete under relatively low loading rates which cover four orders of magnitude (0.2 μm/s to 2.0 mm/s) is investigated with three-point bending (TPB) beams. All measured material properties exhibit rate sensitivity and follow a log-linear relationship with the loading rate. A rate-sensitive softening curve is established. The complete load-crack mouth opening displacement (P-CMOD) curve, crack propagation length, and fracture process zone (FPZ) length are simulated based on crack growth criterion with the fitted material parameters under those loading rates. Results show that the simulated P-CMOD curves agree well with those of experimental measurements. It is clear that the peak load increases with the loading rate and so is the critical crack mouth opening displacement. Moreover, under the same load level, the length of the FPZ and the cohesive stress at the initial crack tip also increase with the increasing loading rate.

AB - Mode I crack propagation process of concrete under relatively low loading rates which cover four orders of magnitude (0.2 μm/s to 2.0 mm/s) is investigated with three-point bending (TPB) beams. All measured material properties exhibit rate sensitivity and follow a log-linear relationship with the loading rate. A rate-sensitive softening curve is established. The complete load-crack mouth opening displacement (P-CMOD) curve, crack propagation length, and fracture process zone (FPZ) length are simulated based on crack growth criterion with the fitted material parameters under those loading rates. Results show that the simulated P-CMOD curves agree well with those of experimental measurements. It is clear that the peak load increases with the loading rate and so is the critical crack mouth opening displacement. Moreover, under the same load level, the length of the FPZ and the cohesive stress at the initial crack tip also increase with the increasing loading rate.

KW - crack growth process

KW - crack propagation criterion of concrete

KW - loading-rate dependence

KW - rate-dependent cohesive law

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DO - 10.1111/ffe.13174

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JO - Fatigue & Fracture of Engineering Materials and Structures

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