Linear creep of bonded FRP-strengthened metallic structures at warm service temperatures

Wang, S.; Stratford, Tim

doi:10.1016/j.conbuildmat.2021.122699

Cited by 17 publications

(38 citation statements)

References 25 publications

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“…Most previous studies of the effects of creep on FRP-strengthened metallic beams have only considered the performance of the strengthened beam under constant elevated temperature and constant load conditions [11][12][13][14][15], leaving it unclear whether the long-term effectiveness of the FRP strengthening is a serious concern when subject to daily variations in ambient temperature and applied load.…”

Section: Take Down Policymentioning

confidence: 99%

“…The analysis in this paper uses a linear viscoelastic constitutive material model for the structural adhesive that was previously developed by the authors [14] for a typical two-part, ambient-cured epoxy resin used in FRP-strengthening (Sikadur 330) [24]. A nonlinear viscoelastic model is not used in this work, as nonlinear viscoelasticity was shown to have limited influence on the behaviour of the FRP-strengthened I-beam [15].…”

Section: Outline Of the Researchmentioning

confidence: 99%

“…The constitutive material model used in this work is described in detail in [14]. It was determined using dynamic mechanical analysis (DMA) multi-frequency scans on the adhesive samples.…”

Section: Outline Of the Researchmentioning

confidence: 99%

“…The ambient-cured epoxy resins used for FRP strengthening of metallic structures exhibit temperature-dependent viscoelastic creep [16][17][18]. Prior to the current paper the authors [14] experimentally characterised the linear viscoelasticity of a typical structural adhesive. They also examined the effect of linear viscoelastic creep on the behaviour of carbon fibre reinforced polymer (CFRP) strengthened I-beams under constant warm temperatures (< 60°C) and constant applied loads.…”

Section: Introductionmentioning

confidence: 99%

“…These studies have been constrained to lap-shear tests, however, and have not analysed the impact of temperature and load cycles on the response of FRP-strengthened beams, with its far longer adhesive joint. They did not properly consider the viscoelasticity of the adhesive, which could bring significant time-temperature related creep deformation to the bonded joint [11,[14][15][16].…”

Section: Introductionmentioning

confidence: 99%

See 4 more Smart Citations

Creep of an FRP-strengthened metallic beam under cyclic temperature and cyclic load

Wang

Stratford²,

Reynolds³

2022

Journal of Constructional Steel Research

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Section: Take Down Policymentioning

confidence: 99%

Section: Outline Of the Researchmentioning

confidence: 99%

“…The constitutive material model used in this work is described in detail in [14]. It was determined using dynamic mechanical analysis (DMA) multi-frequency scans on the adhesive samples.…”

Section: Outline Of the Researchmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

See 3 more Smart Citations

Creep of an FRP-strengthened metallic beam under cyclic temperature and cyclic load

Wang

Stratford²,

Reynolds³

2022

Journal of Constructional Steel Research

Self Cite

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Accelerated‐curing epoxy structural film adhesive for bonding lightweight honeycomb sandwich structures

Zhao

Qiao

et al. 2022

J of Applied Polymer Sci

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Accelerating the curing of epoxy/aromatic amine adhesives and improving their toughness are challenges in heat-resistant epoxy structural adhesives. Herein, we report an epoxy/aromatic amine adhesive accelerated curing system with an oxo-centered trinuclear (chromium III) complex, which is toughened using a thermoplastic block copolymer (TPBC). The reaction characteristics, heat resistance, microstructure, and bonding properties of the accelerated epoxy adhesives were analyzed. The reaction peak temperature of the epoxy with 3% catalyst was 113.1 C, which was 113.6 C lower than that of epoxy without catalyst, and the modified epoxy resin demonstrated a potential for rapid curing at medium temperature. The glass transition temperature of the TPBC-toughened epoxy adhesive was 125 C after curing, indicating excellent thermal stability after medium temperature curing. The introduction of the TPBC increased the single-lap shear strength of the epoxy adhesive without reducing its heat resistance. The shear strength at room temperature and 120 C of the modified epoxy adhesive with 50 phr of TPBC was 25.2 and 10.9 MPa, respectively. Moreover, the epoxy film adhesive exhibited outstanding bonding properties when used in the bonding of lightweight honeycomb sandwich structures.

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Application of the Time–Temperature Superposition Principle to Predict Long-Term Behaviour of an Adhesive for Use in Shipbuilding

Souto-Silvar,

Álvarez-García,

Díaz-Díaz

et al. 2023

Arab J Sci Eng

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The use of adhesives in the marine sector is rather limited at the time being, but their use in specific areas of the ship would be an advantage due, among other things, to their low weight and low stress concentration along the bonding joint. The aim of this work is to predict the long-term behaviour of the material, as this is a critical factor when using adhesive as a bonding method in ships, since its durability must be guaranteed throughout a previously defined life cycle. This can be predicted by applying the time–temperature superposition principle (TTS), which involves carrying out a test at different temperatures for each specimen, considerably reducing the test time. Two types of experiments have been carried out according with operation modes in dynamic mechanical analysis (DMA): a dynamic frequency sweep and a stationary creep test under constant stress, to check the behaviour of the adhesive under both dynamic and sustained loading. The master curve for the frequency study will be constructed in such a way as to cover the whole range of relevant vibrations that can occur on the vessel, while that for the creep test the curve obtained covers a range of 25 years, which is usually used as the minimum service life in shipbuilding. For both, a temperature range from room temperature to the maximum operating temperature of the material established by the manufacturer shall be studied.

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Linear creep of bonded FRP-strengthened metallic structures at warm service temperatures

Cited by 17 publications

References 25 publications

Creep of an FRP-strengthened metallic beam under cyclic temperature and cyclic load

Creep of an FRP-strengthened metallic beam under cyclic temperature and cyclic load

Accelerated‐curing epoxy structural film adhesive for bonding lightweight honeycomb sandwich structures

Application of the Time–Temperature Superposition Principle to Predict Long-Term Behaviour of an Adhesive for Use in Shipbuilding

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