A visco-elastoplastic constitutive model of aircraft polymethylmethacrylate related to strain rate and temperature

Zhang, Bo; LIU, Yanke; YU, Haoyu; ZENG, Yuansong; Lang, Lihui; Li, Yong

doi:10.1016/j.cja.2022.09.005

Cited by 5 publications

(2 citation statements)

References 45 publications

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“…In these cases, the stress–strain curve preceding failure exhibits a distinct linear characteristic, and failure promptly upon the initiation of damage. As the temperature increases, especially when the experimental temperature exceeds

T_{g}

, significant viscoelastic behavior is observed in the tensile and shear test curves due to the softening in the matrix induced by the glass transition 62,63 …”

Section: Resultsmentioning

confidence: 99%

“…As the temperature increases, especially when the experimental temperature exceeds T g , significant viscoelastic behavior is observed in the tensile and shear test curves due to the softening in the matrix induced by the glass transition. 62,63 The transverse bending stress-strain curves of UD CCF/PEEK composites are shown in Figure 2D, indicating a gradual decrease in modulus and strength with increasing temperature, while the failure strain increases with temperature. When the temperature is below the T g , the composites exhibit significant linear characteristics.…”

Section: Uniaxial Tensile Shear and Bending Tests Of Ccf/peek Compositesmentioning

confidence: 99%

See 1 more Smart Citation

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.

show abstract

T_{g}

, significant viscoelastic behavior is observed in the tensile and shear test curves due to the softening in the matrix induced by the glass transition 62,63 …”

Section: Resultsmentioning

confidence: 99%

Section: Uniaxial Tensile Shear and Bending Tests Of Ccf/peek Compositesmentioning

confidence: 99%

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

Ma,

Wen,

Xiao

et al. 2023

Polymer Composites

View full text Add to dashboard Cite

show abstract

Dynamic compressive behavior and constitutive model of polyamide-6 at different temperatures and strain rates

Zhang,

Wu,

et al. 2024

Acta Mech

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Microbiology-inspired nonlinear variable-order fractional model for amorphous glassy polymer

Cai,

Wang,

Zhang

et al. 2024

Acta Mech

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A visco-elastoplastic constitutive model of aircraft polymethylmethacrylate related to strain rate and temperature

Cited by 5 publications

References 45 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

Dynamic compressive behavior and constitutive model of polyamide-6 at different temperatures and strain rates

Microbiology-inspired nonlinear variable-order fractional model for amorphous glassy polymer

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