Preprint Article Version 1 This version is not peer-reviewed

Bond Behavior of CFRP/Steel Double Strap Joint at Elevated Temperatures

Version 1 : Received: 3 August 2018 / Approved: 3 August 2018 / Online: 3 August 2018 (14:31:16 CEST)

How to cite: Li, N.; Li, S.; Liu , C..; Zhu , T.. Bond Behavior of CFRP/Steel Double Strap Joint at Elevated Temperatures. Preprints 2018, 2018080070 (doi: 10.20944/preprints201808.0070.v1). Li, N.; Li, S.; Liu , C..; Zhu , T.. Bond Behavior of CFRP/Steel Double Strap Joint at Elevated Temperatures. Preprints 2018, 2018080070 (doi: 10.20944/preprints201808.0070.v1).

Abstract

Carbon fiber reinforced polymer (CFRP) has been used widely in strengthening of steel structures. Steel/CFRP systems subjected to elevated temperatures is realistic in a summer climate event in many countries where the temperature in steel may approach 50 °C or even higher, which will lead to the degradation of the bond performance between CFRP and steel. Therefore, predicting the bond behavior of the CFRP/steel system under elevated temperature is critical. This paper investigated the mechanical performance of CFRP/steel adhesively-bonded double strap joints at elevated temperatures. Thirty CFRP-steel double strap joints were tested to failure under temperatures between 10 °C and 90 °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. Based on the experimental results, a model is proposed to predict the bond stress of the CFRP/steel at different temperatures.

Subject Areas

CFRP/steel; bond behavior; elevated temperatures; bond stress

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