Modeling of stiffness of FRP composites under elevated and high temperatures

Bai, Yu; Keller, Thomas; Vallée, Till

doi:10.1016/j.compscitech.2008.07.005

Cited by 188 publications

(104 citation statements)

References 15 publications

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“…Simplified prediction equations that can accurately model the variation of the mechanical properties at different temperature exposure are necessary in the of design structures with FRP components [7]. Figure 9 plots the flexural and shear moduli as a function of temperature.…”

Section: Prediction Equation Of Strength and Stiffnessmentioning

confidence: 99%

“…The degradation of the tensile strength of pultruded GFRP composites at elevated temperatures is much lower than that of the shear and compressive strengths because the former property is mainly governed by the fibres while the latter properties is dominated by the resin [5]. As a result, various empirical and mechanisms-based models that predict the temperature-dependent properties of composites have been developed, which are generally functions of either mass (or density) and/or temperature [7,[10][11][12][13][14]. Nevertheless, Correia et al [5] stated that additional experimental data are needed to validate previous results and that further research works are needed regarding the other important properties of pultruded composites profiles, particularly the shear modulus, the elastic modulus in the transverse direction and the interlaminar shear strength (ILSS), which is the limiting design characteristic for pultruded FRP [15].…”

Section: Introductionmentioning

confidence: 99%

“…Based on these studies, the strength, stiffness and interfacial bonding between the fibres and resin of a pultruded GFRP section decrease as the temperature increases [6][7][8]. In particular, the aforementioned mechanical properties drop rapidly when the temperature approaches and/or exceeds the glass transition temperature (Tg) of the polymer matrix, typically ranging from 60 o C to 140 o C [9].…”

Section: Introductionmentioning

confidence: 99%

See 2 more Smart Citations

Temperature-sensitive mechanical properties of GFRP composites in longitudinal and transverse directions: A comparative study

Ferdous

Maranan

Sharma

et al. 2017

Composite Structures

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A comparative study was conducted to evaluate the temperature-sensitive mechanical properties of glass fibre reinforced polymer (GFRP) composites in the longitudinal and transverse directions. GFRP coupons with different shear span-to-depth ratios were tested under three-point static bending test at temperatures ranging from room temperature up to 200 o C. Timoshenko Beam Theory-based procedure was then adopted to calculate the flexural and shear moduli of the GFRP laminates under moderate and elevated in-service temperatures.The results showed that the mechanical properties of the transversely cut specimens is affected more by the increase in temperature than the longitudinally cut specimens. Similarly, the interlaminar shear and flexural strengths of GFRP composites were found influenced more by elevated temperature compared to the stiffness properties. Moreover, the shear modulus undergone more severe degradation compared to the flexural modulus. Simplified empirical models were proposed to estimate the mechanical properties of the GFRP pultruded laminates in both the longitudinal and transverse directions at varying temperatures.

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Section: Prediction Equation Of Strength and Stiffnessmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

See 1 more Smart Citation

Temperature-sensitive mechanical properties of GFRP composites in longitudinal and transverse directions: A comparative study

Ferdous

Maranan

Sharma

et al. 2017

Composite Structures

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“…The predicted temperature responses agreed well with the experimental results. In 2008, the mechanism-based models [30][31][32] were developed to investigate the mechanical behavior of FRP composites in fire. This model was further validated on the predicting of the time-dependent temperature responses, elastic modulus degradation, and time to failure of watercooled full-scale GFRP cellular columns [6].…”

Section: Introductionmentioning

confidence: 99%

Two-Dimensional Modeling of Thermomechanical Responses of Rectangular GFRP Profiles Exposed to Fire

Zhang

Liu

Sun

et al. 2017

Advances in Materials Science and Engineering

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In the past three decades, one-dimensional (1D) thermal model was usually used to estimate the thermal responses of glass fiber-reinforced polymer (GFRP) materials and structures. However, the temperature gradient and mechanical degradation of whole cross sections cannot be accurately evaluated. To address this issue, a two-dimensional (2D) thermomechanical model was developed to predict the thermal and mechanical responses of rectangular GFRP tubes subjected to one-side ISO-834 fire exposure in this paper. The 2D governing heat transfer equations with thermal boundary conditions, discretized by alternating direction implicit (ADI) method, were solved by Gauss-Seidel iterative approach. Then the temperature-dependent mechanical responses were obtained by considering the elastic modulus degradation from glass transition and decomposition of resin. The temperatures and midspan deflections of available experimental results can be reasonably predicted. The overestimation of deflections could be attributed to the underestimation of bending stiffness. This model can also be extended to simulate the thermomechanical responses of beams and columns subjected to multiside fire loading, which may occur in real fire scenarios.

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“…It is well known (Wong and Wang, 2007;Wang et al, 2011;Bai et al, 2008; 43 Correia et al 2013) that the mechanical properties of PFRP materials degrade when the 44 temperature reaches and exceeds the glass transition temperature (T g ). What is not well 45 understood is the effect of elevated temperature on the mechanical response of bolted joints 46 loaded to ultimate failure.…”

mentioning

confidence: 99%

Effect of Elevated Temperatures on the Mechanical Performance of Pultruded FRP Joints with a Single Ordinary or Blind Bolt

Bai

Mottram

2016

J. Compos. Constr.

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9Presented in this paper is a combined experimental and analytical modelling study of the 10 strength of pultruded FRP single bolted double-lap joints subjected to tensile loading and 11 elevated temperatures. Dynamic mechanical analysis (DMA) and thermogravimetric analysis 12 (TGA) are conducted on the polymeric composite material to determine the glass transition 13 temperature and decomposition temperature, respectively. Based on the DMA and TGA 14 results, and to cover glass transition without any material decomposition, the six temperatures

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Modeling of stiffness of FRP composites under elevated and high temperatures

Cited by 188 publications

References 15 publications

Temperature-sensitive mechanical properties of GFRP composites in longitudinal and transverse directions: A comparative study

Temperature-sensitive mechanical properties of GFRP composites in longitudinal and transverse directions: A comparative study

Two-Dimensional Modeling of Thermomechanical Responses of Rectangular GFRP Profiles Exposed to Fire

Effect of Elevated Temperatures on the Mechanical Performance of Pultruded FRP Joints with a Single Ordinary or Blind Bolt

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