Numerical simulation of compact-tension specimens repaired by CFRP

Yuanpeng Zheng; Tao Chen; Cheng Huang; Weijian Wu

doi:10.1016/j.prostr.2023.05.019

Numerical simulation of compact-tension specimens repaired by CFRP

Yuanpeng Zheng, Tao Chen^*, Cheng Huang, Weijian Wu

^*Corresponding author for this work

Department of Civil and Mechanical Engineering

Research output: Chapter in Book/Report/Conference proceeding › Article in proceedings › Research › peer-review

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Abstract

Carbon fiber reinforced polymer (CFRP) reinforcement is emerging as an efficient means of elongating the service life of cracked metallic structures. An experimental program was conducted to investigate the fatigue behavior of compact-tension (CT) specimens repaired by different CFRP configurations. In parallel, numerical simulations of the fatigue crack growth in the CFRP-repaired specimens were also conducted. The eXtended finite element method (XFEM) was employed and shown to provide accurate and efficient calculations of the stress intensity factor (SIF), without remeshing the models during crack propagation. The mechanical properties of the adhesive were simulated using a cohesive traction-separation relationship. Good agreement was observed between the numerical and experimental results of the SIF and fatigue life, with the latter numerically predicted based on the experimentally derived Paris law constants. Insight into the debonding behavior between the CFRP and steel specimens has also been provided. Due allowance for the weakening effect of damage initiation and evolution between the FRP-steel interfaces is required in the reinforcement calculations.

Original language	English
Title of host publication	Procedia Structural Integrity
Editors	Andrei Kotousov, Ching Tai Ng, Wenyi Yan
Volume	45
Publisher	Elsevier
Publication date	2023
Pages	96-103
DOIs	https://doi.org/10.1016/j.prostr.2023.05.019
Publication status	Published - 2023
Event	17th Asia-Pacific Conference on Fracture and Strength and the 13th Conference on Structural Integrity and Failure - Adelaide, Australia Duration: 6 Dec 2023 → 6 Dec 2023

Conference

Conference	17th Asia-Pacific Conference on Fracture and Strength and the 13th Conference on Structural Integrity and Failure
Country/Territory	Australia
City	Adelaide
Period	06/12/2023 → 06/12/2023

Keywords

CFRP
compact-tension specimen
fatigue crack growth rate (FCGR)
stress intensity factor (SIF)
traction-separation relationship

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title = "Numerical simulation of compact-tension specimens repaired by CFRP",

abstract = "Carbon fiber reinforced polymer (CFRP) reinforcement is emerging as an efficient means of elongating the service life of cracked metallic structures. An experimental program was conducted to investigate the fatigue behavior of compact-tension (CT) specimens repaired by different CFRP configurations. In parallel, numerical simulations of the fatigue crack growth in the CFRP-repaired specimens were also conducted. The eXtended finite element method (XFEM) was employed and shown to provide accurate and efficient calculations of the stress intensity factor (SIF), without remeshing the models during crack propagation. The mechanical properties of the adhesive were simulated using a cohesive traction-separation relationship. Good agreement was observed between the numerical and experimental results of the SIF and fatigue life, with the latter numerically predicted based on the experimentally derived Paris law constants. Insight into the debonding behavior between the CFRP and steel specimens has also been provided. Due allowance for the weakening effect of damage initiation and evolution between the FRP-steel interfaces is required in the reinforcement calculations.",

keywords = "CFRP, compact-tension specimen, fatigue crack growth rate (FCGR), stress intensity factor (SIF), traction-separation relationship",

author = "Yuanpeng Zheng and Tao Chen and Cheng Huang and Weijian Wu",

note = "Publisher Copyright: {\textcopyright} 2023 The Authors. Published by Elsevier B.V.; 17th Asia-Pacific Conference on Fracture and Strength and the 13th Conference on Structural Integrity and Failure, APCFS-SIF ; Conference date: 06-12-2023 Through 06-12-2023",

year = "2023",

doi = "10.1016/j.prostr.2023.05.019",

language = "English",

volume = "45",

pages = "96--103",

editor = "Kotousov, {Andrei } and {Tai Ng}, Ching and Yan, {Wenyi }",

booktitle = "Procedia Structural Integrity",

publisher = "Elsevier",

address = "United Kingdom",

}

Zheng, Y, Chen, T, Huang, C & Wu, W 2023, Numerical simulation of compact-tension specimens repaired by CFRP. in A Kotousov, C Tai Ng & W Yan (eds), Procedia Structural Integrity. vol. 45, Elsevier, pp. 96-103, 17th Asia-Pacific Conference on Fracture and Strength and the 13th Conference on Structural Integrity and Failure, Adelaide, South Australia, Australia, 06/12/2023. https://doi.org/10.1016/j.prostr.2023.05.019

TY - GEN

T1 - Numerical simulation of compact-tension specimens repaired by CFRP

AU - Zheng, Yuanpeng

AU - Chen, Tao

AU - Huang, Cheng

AU - Wu, Weijian

PY - 2023

Y1 - 2023

N2 - Carbon fiber reinforced polymer (CFRP) reinforcement is emerging as an efficient means of elongating the service life of cracked metallic structures. An experimental program was conducted to investigate the fatigue behavior of compact-tension (CT) specimens repaired by different CFRP configurations. In parallel, numerical simulations of the fatigue crack growth in the CFRP-repaired specimens were also conducted. The eXtended finite element method (XFEM) was employed and shown to provide accurate and efficient calculations of the stress intensity factor (SIF), without remeshing the models during crack propagation. The mechanical properties of the adhesive were simulated using a cohesive traction-separation relationship. Good agreement was observed between the numerical and experimental results of the SIF and fatigue life, with the latter numerically predicted based on the experimentally derived Paris law constants. Insight into the debonding behavior between the CFRP and steel specimens has also been provided. Due allowance for the weakening effect of damage initiation and evolution between the FRP-steel interfaces is required in the reinforcement calculations.

AB - Carbon fiber reinforced polymer (CFRP) reinforcement is emerging as an efficient means of elongating the service life of cracked metallic structures. An experimental program was conducted to investigate the fatigue behavior of compact-tension (CT) specimens repaired by different CFRP configurations. In parallel, numerical simulations of the fatigue crack growth in the CFRP-repaired specimens were also conducted. The eXtended finite element method (XFEM) was employed and shown to provide accurate and efficient calculations of the stress intensity factor (SIF), without remeshing the models during crack propagation. The mechanical properties of the adhesive were simulated using a cohesive traction-separation relationship. Good agreement was observed between the numerical and experimental results of the SIF and fatigue life, with the latter numerically predicted based on the experimentally derived Paris law constants. Insight into the debonding behavior between the CFRP and steel specimens has also been provided. Due allowance for the weakening effect of damage initiation and evolution between the FRP-steel interfaces is required in the reinforcement calculations.

KW - CFRP

KW - compact-tension specimen

KW - fatigue crack growth rate (FCGR)

KW - stress intensity factor (SIF)

KW - traction-separation relationship

U2 - 10.1016/j.prostr.2023.05.019

DO - 10.1016/j.prostr.2023.05.019

M3 - Article in proceedings

AN - SCOPUS:85170710083

VL - 45

SP - 96

EP - 103

BT - Procedia Structural Integrity

A2 - Kotousov, Andrei

A2 - Tai Ng, Ching

A2 - Yan, Wenyi

PB - Elsevier

T2 - 17th Asia-Pacific Conference on Fracture and Strength and the 13th Conference on Structural Integrity and Failure

Y2 - 6 December 2023 through 6 December 2023

ER -

Numerical simulation of compact-tension specimens repaired by CFRP

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