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

被引：175

作者：

Nguyen, Tien-Cuong ^{[1
]}

Bai, Yu ^{[1
]}

Zhao, Xiao-Ling ^{[1
]}

Al-Mahaidi, Riadh ^{[2
]}

机构：

[1] Monash Univ, Dept Civil Engn, Clayton, Vic 3800, Australia

[2] Swinburne Univ Technol, Fac Engn & Ind Sci, Hawthorn, Vic 3122, Australia

来源：

COMPOSITE STRUCTURES | 2011年 / 93卷 / 06期

基金：

澳大利亚研究理事会;

关键词：

CFRP; Steel; Double strap joint; Temperature effect; Mechanical properties; Effective bond length; MODULUS; COMPOSITES; BEHAVIOR;

D O I：

10.1016/j.compstruct.2011.01.010

中图分类号：

O3 [力学];

学科分类号：

08 ; 0801 ;

摘要：

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 degrees C) of the adhesive. A series of joints with different bond lengths were tested to failure at temperatures between 20 degrees C and 60 degrees 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. (C) 2011 Elsevier Ltd All rights reserved.

引用

页码：1604 / 1612

页数：9

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