Mechanical characterization of steel/CFRP double strap joints at elevated temperatures
Source abstract
Abstract
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.
Source: openaire · Quality: candidate unverified · Source record ↗
Research context
OpenAlex topics: Fire effects on concrete materials · Mechanical Behavior of Composites · Structural Behavior of Reinforced Concrete
SciVX discovery tags are terminology-based. OpenAlex topics are source-provided classifications.
References (32)
Show source-provided references
1. State of the art review on FRP strengthened steel structures10.1016/j.engstruct.2006.10.006 ↗
2. Progress in the technique of upgrading metallic structures with advanced polymer composites10.1002/pse.112 ↗
3. Bond-slip models for double strap joints strengthened by CFRP10.1016/j.compstruct.2009.09.042 ↗
4. Strengthening of circular hollow steel tubular sections using high modulus CFRP sheets10.1016/j.conbuildmat.2006.06.014 ↗
5. Experimental and finite element analysis of a double strap joint between steel plates and normal modulus CFRP10.1016/j.compstruct.2006.04.038 ↗
6. Effect of fatigue loading on bond strength between CFRP sheets and steel plates10.1142/S0219455410003348 ↗
7. Liu HB, Zhao XL, Al-Mahaidi R, Rizkalla S. Analytical bond models between steel and normal modulus CFRP. In: The fourth international conference on advances in steel structures (ICASS), Shanghai; June 2005. p. 1545–53.10.1016/B978-008044637-0/50230-4 ↗
8. Bond characteristics between CFRP and steel plates in double strap joints
9. Xia SH, Teng JG. Behaviour of FRP-to steel bonded joints. In: Proceedings of the international symposium on bond behavior of FRP in structures, Hong Kong; 2005. p. 419–26.
10. Strengthening of a Steel Bridge Girder Using CFRP Plates10.1061/(ASCE)1084-0702(2001)6:6(514) ↗
11. Bai T, Zhao XL, Al-Mahaidi R. Post yielding behaviour of CFRP Steel adhesive joints under static and cyclic loading. In: 5th international conference on thin-walled structures, Brisbane; June 2008.
12. Wu C, Zhao XL, Al-Mahaidi R, Duan WH. Experimental study on bond behaviour between UHM CFRP laminate and steel. In: The 5th international conference on FRP composites in civil engineering, Beijing; 27–29 September 2010. p. 890–3.10.1007/978-3-642-17487-2_196 ↗
13. Effect of elevated temperature on bond behaviour of high modulus CFRP/steel double-strap joints10.1080/13287982.2009.11465033 ↗
14. The tensile behavior of carbon fibers at high temperatures up to 2400 C10.1016/j.carbon.2003.11.020 ↗
15. Modeling of mechanical response of FRP composites in fire10.1016/j.compositesa.2009.03.003 ↗
16. Modeling of stiffness of FRP composites under elevated and high temperatures10.1016/j.compscitech.2008.07.005 ↗
17. Pultruded GFRP tubes with liquid-cooling system under combined temperature and compressive loading10.1016/j.compstruct.2009.02.009 ↗
18. Lam CCA, Cheng JJR, Yam CHM. Study of the tensile strength of CFRP/steel double lap joints. In: Advanced composite materials in bridges and structures. Calgary, Alberta; 2004.
19. Analytical models of adhesively bonded joints – part I: literature survey10.1016/j.ijadhadh.2008.06.005 ↗
20. Hart-Smith LJ. Adhesive-bonded double-lap joints. In: Techinical report NASA CR-112235. Douglas Aircraft Company: Long Beach, California, USA; 1973.
21. Fawzia S. Bond characteristics between steel and carbon fibre reinforced polymer (CFRP) composites. Monash Univeristy, PhD thesis; 2007.
22. Laminate theory analysis of composites under load in fire10.1177/0021998305055543 ↗
23. Model for predicting the mechanical properties of composites at elevated temperatures10.1177/073168448400300105 ↗
24. Effects of thermal loading history on structural adhesive modulus across glass transition10.1016/j.conbuildmat.2010.11.012 ↗
25. Al-Shawaf A. Characterization of bonding behavior between wet-lay up carbon fibre reinforced polymer and steel plates in double-strap joints under extreme environmental temperatures. Monash Univeristy, PhD thesis; 2010.
26. BASF The Chemical Company. BASF The Chemical Company; 2010. .
27. Huntsman. Structural adhesives aerospace adhesives araldite 420A/B; 2010. .
28. Australian standard AS1391. Metallic materials – tensile testing at ambient temperature. Standards Australia; 2007.
29. Joint design
30. Faleh H. CFRP-steel joints using different nanoparticle-enhanced epoxies. In Department of Civil Engineering. Monash University, PhD thesis; 2010.
31. Kinetic parameters from thermogravimetric data10.1038/201068a0 ↗
32. Australian standard AS4100, steel structures. Standards Australia; 1998.