Three-dimensional modeling and experimental validation of thermomechanical response of FRP composites exposed to one-sided heat flux

Shi, Shengbo; Fu, Pingqing; Liang, Jun; Yi, Fajun; Lin, Guiping

doi:10.1016/j.matdes.2016.03.098

Cited by 10 publications

(9 citation statements)

References 39 publications

(45 reference statements)

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“…This may be due to the increasing thermal conductivity caused by the temperature increase, resulting in the heat transfer being faster. Thus, the char region and pyrolysis region can be distinguished definitely, which is an appropriate metric for predicting the likelihood of cracking or delamination caused by decomposition, for helping to evaluate the thermal behavior of composites [30]. Figure 8 shows the decomposition degree contours of the glass fiber phenolic resin composite, which equals one minus F, which is defined in Equation (4).…”

Section: Field Of Temperaturementioning

confidence: 99%

“…Namely, the further the depth position from the heating surface is, the lower the Figure 9 shows the decomposition degree-temperature curves calculated at z = 1, 5, 10, 29 mm, which is similar to the typical TGA curves of polymer material at different rates of temperature increase. There is a phenomenon neglected easily by researchers [8,30] in calculations that the temperatures when the char density is reached at different depths are different. The materials at z = 1, 5, 10 mm reached the char density at 714 • C, 682 • C, and 659 • C, respectively.…”

Section: Field Of Temperaturementioning

confidence: 99%

“…With the rapid development of modern design and analysis tools, commercial finite element software is used more and more widely to simulate the thermal behavior of compound materials in fire. Shi et al [30] predicted the thermo-mechanical characteristics of a silica/phenolic compound material, and investigated spatially dependent temperature and orifice pressure, displacement, and stress contours using COMSOL-Multiphysics commercial finite element software for the coupled temperature-proliferation-deformation problem. Zhang [31] developed a 3D model including the influence of orthotropic viscoelasticity and pyrolysis using commercial finite element software ABAQUS, in order to forecast the thermomechanical characteristics and compressive failure of polymer matrix composites (PMCs) subjected to high temperature and compressive loading.…”

Section: Introductionmentioning

confidence: 99%

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Simulation of Thermal Behavior of Glass Fiber/Phenolic Composites Exposed to Heat Flux on One Side

Wang

Han

et al. 2020

Materials

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A 3D thermal response model is developed to evaluate the thermal behavior of glass fiber/phenolic composite exposed to heat flux on one side. The model is built upon heat transfer and energy conservation equations in which the heat transfer is in the form of anisotropic heat conduction, absorption by matrix decomposition, and diffusion of gas. Arrhenius equation is used to characterize the pyrolysis reaction of the materials. The diffusion equation for the decomposition gas is included for mass conservation. The temperature, density, decomposition degree, and rate are extracted to analyze the process of material decomposition, which is implemented by using the UMATHT (User subroutine to define a material’s thermal behavior) and USDFLD (User subroutine to redefine field variables) subroutines via ABAQUS code. By comparing the analysis results with experimental data, it is found that the model is valid to simulate the evolution of a glass fiber/phenolic composite exposed to heat flux from one side. The comparison also shows that longer time is taken to complete the pyrolysis reaction with increasing depth for materials from the numerical simulation, and the char region and the pyrolysis reaction region enlarge further with increasing time. Furthermore, the decomposition degree and temperature are correlated with depths, as well as the peak value of decomposition rate and the time to reach the peak value.

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Section: Field Of Temperaturementioning

confidence: 99%

Section: Field Of Temperaturementioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

See 1 more Smart Citation

Simulation of Thermal Behavior of Glass Fiber/Phenolic Composites Exposed to Heat Flux on One Side

Wang

Han

et al. 2020

Materials

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“…With the rapid development of modern design and analysis tools, commercial finite element software is used more and more widely to simulate the thermal response of composite materials in fire. Shi et al 18,19 predicted the thermomechanical behavior of a silica/phenolic composite, and investigated spatially dependent temperature and pore pressure, displacement, and stress contours using COMSOL-Multiphysics commercial finite element software for the coupled temperature-diffusion-deformation problem, and proposed a model including the surface ablation module and volumetric ablation module to predict the ablation behavior of SiFRP composites. Zhang 20 exploited a three-dimensional model using the ABAQUS commercial software, which included the influence of orthotropic viscoelasticity and pyrolysis to predict the thermomechanical behavior and compression failure of polymer-based composites subjected to compression and thermal loading.…”

Section: Introductionmentioning

confidence: 99%

Thermal response study of carbon epoxy laminates exposed to fire

Fan

Wang

et al. 2020

Polymer Composites

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In this article, a three-dimensional thermal response model is developed to investigate the thermal behavior of carbon epoxy composite impacted directly by propane flame. The model is established in consideration of heat transfer and energy conservation in which the heat transfer is in the form of anisotropic heat conduction, absorption by matrix decomposition, and diffusion of gas. Arrhenius equation is utilized to present the decomposition process of the materials. The diffusion equation for the decomposition gas is included for mass conservation. The thermal response model is implemented with the UMATHT and USDFLD subroutines via ABAQUS code, from which the temperature, density, decomposition degree, and decomposition rate can be extracted to analysis the process of material decomposition by finite element simulation. The model shows its capability to analysis the evolution of a carbon epoxy composite in fire by the comparison between the numerical and experimental results. Furthermore, the numerical results show that thermal conductivities in different directions of fiber have a significant influence on the heat transfer. In addition, the relationship between the decomposition degree and temperature is correlated with depths, as well as the peak value of decomposition rate and the time to reach that.

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“…In 2011, Miano [21] developed a three-dimensional (3D) finite element (FE) thermal model with ATD to estimate the temperature profiles of carbon fiber-reinforced polymer (CFRP) wing box laminates. More recently, a 3D FE model was developed by Shi et al [33] to investigate the coupled temperature-diffusiondeformation problem of silica/phenolic composite materials. The accuracy of this model was validated by comparing the measured temperatures and displacements with numerical results.…”

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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Three-dimensional modeling and experimental validation of thermomechanical response of FRP composites exposed to one-sided heat flux

Cited by 10 publications

References 39 publications

Simulation of Thermal Behavior of Glass Fiber/Phenolic Composites Exposed to Heat Flux on One Side

Simulation of Thermal Behavior of Glass Fiber/Phenolic Composites Exposed to Heat Flux on One Side

Thermal response study of carbon epoxy laminates exposed to fire

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

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