Bond durability of CFRP laminates-to-steel joints subjected to freeze-thaw

Yang, Yongming; Biscaia, Hugo C.; Chastre, Carlos

doi:10.1016/j.compstruct.2019.01.016

Cited by 41 publications

(9 citation statements)

References 37 publications

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“…The CFRP laminates had coefficients of thermal expansion (CTE) of approximately 0 C. 56 CPS4R elements (with four-node bilinear plane stress quadrilateral, reduced integration, hourglass control) were used to mesh the CFRP adherend as illustrated in Figure 13. The steel had a CTE of 14 Â 10 À6 / C, 57 highly dissimilar to that of the CFRP. The steel adherend was also modeled with CPS4R elements.…”

Section: Cfrp-steel Sljsmentioning

confidence: 99%

Determination of fracture toughness of an adhesive in civil engineering and interfacial damage analysis of carbon fiber reinforced polymer–steel structure bonded joints

Yang

Zhao

Zhang

et al. 2021

Proceedings of the Institution of Mechanical Engineers, Part L:

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Carbon fiber reinforced polymer–steel structural bonded joints are often subject to mixed-mode loading i.e. coupling action of normal and shear stress occurs in the joints. In this paper, an experimental approach based on fracture mechanics was adopted to obtain the fracture toughness (GΙC and GΙΙC) of an adhesive currently employed in civil engineering applications, with the corresponding pure cohesive models verified by numerical results. Furthermore, feasibility of the mixed-mode cohesive model for the current adhesive was validated through comparison of numerical and experimental results of carbon fiber reinforced polymer–steel single-lap joints. Finally, based on the validated mixed-mode cohesive model, the interfacial damage of carbon fiber reinforced polymer–steel beam joints was analyzed using the finite element method, accounting for the long-term degradation that can occur in the joint materials i.e. carbon fiber reinforced polymer and adhesive. The work in this paper can provide some useful data such as the fracture properties of the adhesive and shed some light on the design optimization of carbon fiber reinforced polymer–steel structure joints as well as the estimation of its long-term interfacial behavior when in service in civil engineering applications.

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Section: Cfrp-steel Sljsmentioning

confidence: 99%

Determination of fracture toughness of an adhesive in civil engineering and interfacial damage analysis of carbon fiber reinforced polymer–steel structure bonded joints

Yang

Zhao

Zhang

et al. 2021

Proceedings of the Institution of Mechanical Engineers, Part L:

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show abstract

“…To simulate the traction between the steel surface and CFRP, the adhesive layer was applied using a coupled cohesive zone which obeys traction separation law where all three directional tractions and separations have been considered. Before damage in the adhesive initiated, the response of adhesive is assumed to be linear [31][32][33][34]. Thus, the interfacial behaviour of the adhesive before damage initiation is represented by, 00 00 00…”

Section: Adhesivementioning

confidence: 99%

Numerical investigation of CFRP strengthened RHS members under cyclic loading

et al. 2020

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Rectangular hollow section (RHS) steel members are commonly utilized in various mechanical and civil engineering applications, but they have shown to be quite vulnerable under cyclic loading. In both onshore and offshore infrastructure, steel members can be subjected to cyclic loading produced by earthquakes, currents, wind and waves. Considering multiple factors, such as design errors, the influence of environmental conditions, an increase in applied loads and material deterioration, steel members may require strengthening to withstand cyclic loadings.This study presents numerical simulations using Finite Element (FE) modelling techniques to analyse carbon fibre reinforced polymer (CFRP) strengthened RHS steel members subjected to cyclic loading to predict their behaviour and modes of failure. The predicted results are compared with available results from experimental tests to validate the numerical models and ensure their accuracy. Results imply that CFRP strengthened RHS steel members demonstrate enhanced cyclic performance in which the moment-rotation hysteresis behaviour, secant

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“…In another study, no shear strength reduction was obtained after 833 temperature cycles between –20°C and 20°C at 50% relative humidity (RH) but the steel/CF composite joint failure mode was nevertheless changed to an adhesive failure mode. 6 Steel/CF composite joints were exposed to deionised water at a temperature of 75°C for 162 weeks and eventually stored at –20°C for a period of 24 h. 7 Water absorption led to plasticisation of the adhesive and water freezing to the creation of micro voids. Desorption and re-absorption experiments showed that the specimens exposed to a temperature of –20°C for 24 h absorbed more water than those that were not.…”

Section: Introductionmentioning

confidence: 99%

“…Desorption and reabsorption experiments showed that the specimens exposed to a temperature of -20 C for 24 h absorbed more water than those that were not. Thus, for thermoset composites and their bonded joints, it seems that freeze/thaw cycles alone do not have a significant detrimental effect on the bond strength, 6,8 while the combination with moisture absorption causes a degradation of the adhesive 7 and a reduction of the joint strength. 5,9 Thermoplastic composites are said to be less affected by environmental conditions compared to thermoset composites.…”

Section: Introductionmentioning

confidence: 99%

Influence of freeze/thaw cycling on the mechanical performance of resistance-welded carbon fibre/polyphenylene sulphide composite joints

Rohart

Lebel

Dubé

2020

Journal of Reinforced Plastics and Composites

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This study evaluates the effects of freeze/thaw cycles on the mechanical performance and failure mode of resistance-welded carbon fibre/polyphenylene sulphide composite joints. Dry and moisture-saturated joints are subjected to 1000 temperature cycles varying between –40°C and 82°C. A silane coating is applied on the stainless steel mesh heating element to improve its adhesion with the polyphenylene sulphide polymer. Results show the limited impact that freeze/thaw cycles have on the lap shear strength of joints welded without any coating on the heating element. The silane coating improves the lap shear strength by 32% when no freeze/thaw cycles are applied to the joints. This improvement of 32% reduces when joints are subjected to freeze/thaw cycles but the mechanical performance remains superior to that of joints welded using uncoated heating element. Fracture surfaces show that fibre/matrix and stainless steel/matrix interfaces are both affected by the environmental conditions although it does not translate into lower lap shear strength.

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Bond durability of CFRP laminates-to-steel joints subjected to freeze-thaw

Cited by 41 publications

References 37 publications

Determination of fracture toughness of an adhesive in civil engineering and interfacial damage analysis of carbon fiber reinforced polymer–steel structure bonded joints

Determination of fracture toughness of an adhesive in civil engineering and interfacial damage analysis of carbon fiber reinforced polymer–steel structure bonded joints

Numerical investigation of CFRP strengthened RHS members under cyclic loading

Influence of freeze/thaw cycling on the mechanical performance of resistance-welded carbon fibre/polyphenylene sulphide composite joints

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