Displacement-function modeling of thermo-mechanical behavior of fiber-reinforced composite structures

Ahmed, Shamsuddin; Sarkar, Pranta Rahman

doi:10.1016/j.ijmecsci.2021.106739

Cited by 7 publications

(3 citation statements)

References 66 publications

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“…Due to the flexibility of the design and the uncertainty of the manufacture, the volume content, the microscopic distribution, and the arrangement direction of reinforcing fibers in CCF/PEEK composites would vary significantly. Therefore, evaluating the mechanical performance of composites cannot solely rely on tests, but requires theoretical models and numerical simulations to deepen the understanding of the mechanical properties at different scales from the fiber level to the structure level 19–23 . Up to now, various theoretical models have been developed to predict the elastic response of unidirectional (UD) composites based on the micro‐mechanical approaches, such as the generalized cells model, 24 simplified unit cell model, 25 Mori‐Tanaka model, 26 Chamis model, 27,28 free shear traction (FST) method, 29 bridging model, 30 and so forth, which have been widely applied to predict the elastic mechanical response of UD composites.…”

Section: Introductionmentioning

confidence: 99%

“…Therefore, evaluating the mechanical performance of composites cannot solely rely on tests, but requires theoretical models and numerical simulations to deepen the understanding of the mechanical properties at different scales from the fiber level to the structure level. [19][20][21][22][23] Up to now, various theoretical models have been developed to predict the elastic response of unidirectional (UD) composites based on the micro-mechanical approaches, such as the generalized cells model, 24 simplified unit cell model, 25 Mori-Tanaka model, 26 Chamis model, 27,28 free shear traction (FST) method, 29 bridging model, 30 and so forth, which have been widely applied to predict the elastic mechanical response of UD composites. To solve the timeÀ/temperature-dependent anisotropic problems, some of the models can be extended to incorporate the elastic-viscoelastic correspondence principle.…”

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confidence: 99%

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Bottom‐up analysis framework for the continuous multidirectional carbon fiber‐reinforced PEEK composite laminates

Ma,

Wen,

Xiao

et al. 2023

Polymer Composites

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The continuous carbon fiber‐reinforced polyether ether ketone (CCF/PEEK) composites have been widely utilized in aerospace structures due to their excellent properties. However, the main load‐bearing structure in the next‐generation aircraft needs to withstand high temperatures up to 200°C, and the mechanical properties of CCF/PEEK composites show significant time‐/temperature‐dependence due to the viscoelastic nature of the PEEK matrix. Therefore, accurate predictions of the mechanical performance of CCF/PEEK composites under high‐temperature service conditions are the key issue for structural safety and life assessments and have therefore become a recent research focus. To address these challenges, this study established a bottom‐up analysis framework for the CCF/PEEK composites and employed the theoretical model and the finite‐element representative volume element (FE‐RVE) method to investigate the anisotropic viscoelastic properties of CCF/PEEK composites. We first built an anisotropic viscoelastic model of the unidirectional CCF/PEEK composites by integrating the generalized Maxwell into the bridging model. Upon this foundation, we further developed a viscoelastic laminate model capable of accurately predicting the thermoviscoelastic properties of multidirectional laminates. To verify the developed model, different kinds of FE‐RVEs were built and analyzed. Overall, there is good agreement among the model predictions, the FE‐RVE simulations, and the experimental results within a temperature range of 25–250°C. The developed model can be used to design the high‐temperature performance of CCF/PEEK composites with different fiber volume fractions, laminated configurations, or loading directions.Highlights An anisotropic viscoelastic model of the unidirectional (UD) continuous carbon fiber‐reinforced polyether ether ketone (CCF/PEEK) composites is built. The viscoelastic laminate composite model is developed based on the UD CCF/PEEK composites model. The finite element representative volume element (FE‐RVE) simulation with fibers in a hexagonal or random array has better accuracy compared with the experimental results. The FE‐RVE simulation and the experimental results verified the developed model from 25°C to 250°C.

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Section: Introductionmentioning

confidence: 99%

mentioning

confidence: 99%

Bottom‐up analysis framework for the continuous multidirectional carbon fiber‐reinforced PEEK composite laminates

Ma,

Wen,

Xiao

et al. 2023

Polymer Composites

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“…In fact, these papers and the present one belong to the broad field of research on thermo-mechanics of heterogeneous/composite materials and structures. The thermo-mechanical couplings are constantly a subject of intensive scientific activity; see, for instance [34][35][36][37][38][39][40][41].…”

Section: Introductionmentioning

confidence: 99%

Simulation of PLC Effect Using Regularized Large-Strain Elasto-Plasticity

2022

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The purpose of this paper is to develop a constitutive description and to numerically simulate a propagating instability phenomenon called the Portevin–Le Chatelier (PLC) effect, which is observed for metallic materials. It manifests itself by moving plastic shear bands in the sample and serrations in the stress–strain diagram. In this paper, the PLC is modeled by geometrically non-linear thermo-visco-plasticity with the hardening function of the Estrin–McCormick type to reproduce a serrated response. To regularize softening, which in this model comes from thermal, geometrical and strain-rate effects, the viscosity and heat conductivity are incorporated. Plasticity description can additionally include degradation of the yield strength, and then the model is enhanced by higher-order gradients. Simulations are performed using AceGen/FEM. Two tensioned specimens are tested: a rod and a dog-bone sample. The first specimen is used for general verification. The results obtained for the second specimen are compared with the experimental results. Studies for different values of model parameters are performed. The results of the simulations are in good agreement with the experimental outcome and the sensitivity to model parameters is in line with the expectations for the pre-peak regime. In the presented tests, the gradient enhancement does not significantly influence the results.

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Minimization of thermal stress in perforated composite plate using metaheuristic algorithms WOA, SCA and GA

Jafari

Chaleshtari

Khoramishad

et al. 2023

Composite Structures

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Displacement-function modeling of thermo-mechanical behavior of fiber-reinforced composite structures

Cited by 7 publications

References 66 publications

Bottom‐up analysis framework for the continuous multidirectional carbon fiber‐reinforced PEEK composite laminates

Bottom‐up analysis framework for the continuous multidirectional carbon fiber‐reinforced PEEK composite laminates

Simulation of PLC Effect Using Regularized Large-Strain Elasto-Plasticity

Minimization of thermal stress in perforated composite plate using metaheuristic algorithms WOA, SCA and GA

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