Mechanical characterization of steel/CFRP double strap joints at elevated temperatures

Tien Cuong Nguyen; Yu Bai; Xiao Ling Zhao; Riadh Al-Mahaidi

doi:10.1016/j.compstruct.2011.01.010

Mechanical characterization of steel/CFRP double strap joints at elevated temperatures

Tien Cuong Nguyen, Yu Bai, Xiao Ling Zhao, Riadh Al-Mahaidi

Research output: Journal article publication › Journal article › Academic research › peer-review

192 Citations (Scopus)

Abstract

This paper examines the mechanical performance of steel/CFRP adhesively-bonded double strap joints at elevated temperatures around the glass transition temperature (T_g, 42 °C) of the adhesive. A series of joints with different bond lengths were tested to failure at temperatures between 20 °C and 60 °C. It was found that the joint failure mode changed from adherend failure to debonding failure as the temperature approached T_g. In addition, the ultimate load and joint stiffness decreased significantly at temperatures near to and greater than T_g, while the effective bond length increased with temperature. Based on the ultimate load prediction model developed by Hart-Smith for double lap joints and kinetic modelling of the mechanical degradation of the adhesive, a mechanism-based model is proposed to describe the change of effective bond length, stiffness and strength degradation for steel/CFRP double strap joints at elevated temperatures. The modelling results were validated by the corresponding experimental measurements.

Original language	English
Pages (from-to)	1604-1612
Number of pages	9
Journal	Composite Structures
Volume	93
Issue number	6
DOIs	https://doi.org/10.1016/j.compstruct.2011.01.010
Publication status	Published - May 2011
Externally published	Yes

Keywords

CFRP
Double strap joint
Effective bond length
Mechanical properties
Steel
Temperature effect

ASJC Scopus subject areas

Ceramics and Composites
Civil and Structural Engineering

More information

10.1016/j.compstruct.2011.01.010

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title = "Mechanical characterization of steel/CFRP double strap joints at elevated temperatures",

abstract = "This paper examines the mechanical performance of steel/CFRP adhesively-bonded double strap joints at elevated temperatures around the glass transition temperature (Tg, 42 °C) of the adhesive. A series of joints with different bond lengths were tested to failure at temperatures between 20 °C and 60 °C. It was found that the joint failure mode changed from adherend failure to debonding failure as the temperature approached Tg. In addition, the ultimate load and joint stiffness decreased significantly at temperatures near to and greater than Tg, while the effective bond length increased with temperature. Based on the ultimate load prediction model developed by Hart-Smith for double lap joints and kinetic modelling of the mechanical degradation of the adhesive, a mechanism-based model is proposed to describe the change of effective bond length, stiffness and strength degradation for steel/CFRP double strap joints at elevated temperatures. The modelling results were validated by the corresponding experimental measurements.",

keywords = "CFRP, Double strap joint, Effective bond length, Mechanical properties, Steel, Temperature effect",

author = "Nguyen, {Tien Cuong} and Yu Bai and Zhao, {Xiao Ling} and Riadh Al-Mahaidi",

note = "Funding Information: The authors wish to acknowledge the financial support provided by the Australian Research Council through the ARC Discovery Scheme, the Monash University Engineering New Staff Member Fund and a Monash Graduate Scholarship. Thanks are given to Dr. Mike Bambach for his comments on the experimental plan. The tests were conducted in the Civil Engineering Laboratory at Monash University. Thanks are also given to Mr. Long Goh and Mr. Kevin Nievaart for their assistance.",

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doi = "10.1016/j.compstruct.2011.01.010",

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AU - Nguyen, Tien Cuong

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AU - Zhao, Xiao Ling

AU - Al-Mahaidi, Riadh

N1 - Funding Information: The authors wish to acknowledge the financial support provided by the Australian Research Council through the ARC Discovery Scheme, the Monash University Engineering New Staff Member Fund and a Monash Graduate Scholarship. Thanks are given to Dr. Mike Bambach for his comments on the experimental plan. The tests were conducted in the Civil Engineering Laboratory at Monash University. Thanks are also given to Mr. Long Goh and Mr. Kevin Nievaart for their assistance.

PY - 2011/5

Y1 - 2011/5

N2 - This paper examines the mechanical performance of steel/CFRP adhesively-bonded double strap joints at elevated temperatures around the glass transition temperature (Tg, 42 °C) of the adhesive. A series of joints with different bond lengths were tested to failure at temperatures between 20 °C and 60 °C. It was found that the joint failure mode changed from adherend failure to debonding failure as the temperature approached Tg. In addition, the ultimate load and joint stiffness decreased significantly at temperatures near to and greater than Tg, while the effective bond length increased with temperature. Based on the ultimate load prediction model developed by Hart-Smith for double lap joints and kinetic modelling of the mechanical degradation of the adhesive, a mechanism-based model is proposed to describe the change of effective bond length, stiffness and strength degradation for steel/CFRP double strap joints at elevated temperatures. The modelling results were validated by the corresponding experimental measurements.

AB - This paper examines the mechanical performance of steel/CFRP adhesively-bonded double strap joints at elevated temperatures around the glass transition temperature (Tg, 42 °C) of the adhesive. A series of joints with different bond lengths were tested to failure at temperatures between 20 °C and 60 °C. It was found that the joint failure mode changed from adherend failure to debonding failure as the temperature approached Tg. In addition, the ultimate load and joint stiffness decreased significantly at temperatures near to and greater than Tg, while the effective bond length increased with temperature. Based on the ultimate load prediction model developed by Hart-Smith for double lap joints and kinetic modelling of the mechanical degradation of the adhesive, a mechanism-based model is proposed to describe the change of effective bond length, stiffness and strength degradation for steel/CFRP double strap joints at elevated temperatures. The modelling results were validated by the corresponding experimental measurements.

KW - CFRP

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KW - Effective bond length

KW - Mechanical properties

KW - Steel

KW - Temperature effect

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Mechanical characterization of steel/CFRP double strap joints at elevated temperatures

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Keywords

ASJC Scopus subject areas

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