Investigation of Fatigue Behavior of Steel and GFRP Double-Strap Joints under Varied Cyclic Loading at Given Temperatures

Published on Apr 1, 2020in Journal of Materials in Civil Engineering2.169
· DOI :10.1061/(ASCE)MT.1943-5533.0003098
Jie Liu2
Estimated H-index: 2
(SEU: Southeast University),
Tong Guo19
Estimated H-index: 19
(SEU: Southeast University)
+ 1 AuthorsJunfeng Jia1
Estimated H-index: 1
(Beijing University of Technology)
AbstractThis paper examines the fatigue behavior of steel/glass fiber reinforced polymer (GFRP) double-strap joints under a variation of cyclic shear loading at different given temperatures. Initia...
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Abstract It is shown that thermal effects, whether due to mismatch of the adherends or to adhesive contraction by temperature or cure, lead to significant changes in the stress state of lap joints. At the same time, the stress/strain properties of polymeric adhesives also vary considerably with temperature. The combined effect of these factors is illustrated by the variation of strength of single lap shear joints.
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Abstract Fatigue tests were conducted on scarf adhesive joints (SAJs) with composite substrates at room temperature (RT) and 50°C. The adhesive layer was modified with Al2O3-nanoparticles. Dynamic parameters such as damping factor, storage modulus, dissipated energy and potential energy (Up) were measured from the stress–strain hysteresis loops of the SAJs with the aim of knowing which ones are best for early prediction of joint collapse. Incorporation of Al2O3-nanoparticles into the adhesive la...
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Abstract The fatigue behavior of an adhesively bonded glass fiber-reinforced polymer (GFRP)/steel double-lap joint (DLJ) under cyclic tensile loading with load ratio R = 0.1 was experimentally studied. Results in terms of failure mode, F-N curve, stiffness degradation law, crack initiation and propagation laws were obtained. Linear and nonlinear models of stiffness degradation and a mathematical model of the crack growth rate were developed for the adhesive GFRP/steel DLJ under fatigue loading. ...
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