An integrated computational framework for simulating the failure response of carbon fiber reinforced polymer composites

Ahmadian, Hossein; Liang, Binyong; Soghrati, Soheil

doi:10.1007/s00466-017-1457-5

Cited by 12 publications

(2 citation statements)

References 102 publications

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“…In this study, a UD (0 • ) and continuous (endto-end) and long (105 ± 2 mm) fibre arrangement was constantly maintained for the rCF/EP and rGF/EP composite types. Similar structured vCFRP composites lamina are transversely isotropic [15,43,44], or, in some cases, even anisotropic [21]. The vGFRP and EP behave as elastic isotropic solids [36], even though vGFRP microscopically behaves as transversely isotropic [13].…”

Section: Recycled Composite Assumptionmentioning

confidence: 99%

A Finite Element Study to Investigate the Mechanical Behaviour of Unidirectional Recycled Carbon Fibre/Glass Fibre–Reinforced Epoxy Composites

Gopalraj

Kärki

2021

Polymers

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Recycled carbon fibre–reinforced epoxy (rCF/EP) composites and recycled glass fibre–reinforced epoxy (rGF/EP) composites were numerically investigated to examine their mechanical properties, such as uniaxial tensile and impact resistance, using finite element (FE) methods. The recycled composites possess unidirectional, long and continuous fibre arrangements. A commercially available Abaqus/CAE software was used to perform an explicit non-linear analysis with a macroscale modelling approach, assuming the recycled composites as both homogenous and isotropic hardening. Five composite types were subjected to a numerical study based on the recycled fibre’s volume fraction (40 and 60%) of rCF/EP and rGF/EP, along with (100%) fibreless cured epoxy samples. The materials were defined as elastoplastic with a continuum ductile damage (DUCTCRT) model. The experimental tensile test results were processed and calibrated as primary input data for the developed FE models. The numerical tensile results, maximum principal stress and logarithmic strain were validated with their respective experimental results. The stress–strain curves of both results possess a high accuracy, supporting the developed FE model. The numerical impact tests examined the von Mises stress distribution and found an exponential decrease in the stiffness of the composite types as their strength decreased, with the 60% rCF/EP sample being the stiffest. The model was sensitive to the mesh size, hammer velocity and simulation time step. Additionally, the total internal energy and plastic dissipation energy were measured, but were higher than the experimentally measured energies, as the FE models eliminated the defects from the recycled process, such as a poor fibre wettability to resin, fibre bundle formation in rCFs and char formation in rGFs. Overall, the developed FE models predicted the results for a defect-free rCF/EP and rGF/EP composite. Hence, the adopted modelling techniques can validate the experimental results of recycled composites with complex mechanical properties and damage behaviours in tensile and impact loading conditions.

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Section: Recycled Composite Assumptionmentioning

confidence: 99%

A Finite Element Study to Investigate the Mechanical Behaviour of Unidirectional Recycled Carbon Fibre/Glass Fibre–Reinforced Epoxy Composites

Gopalraj

Kärki

2021

Polymers

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“…Because no experimental values are available for the composites discussed in Section 4 and beyond, in this study we use the Halpin-Tsai relationships to estimate the transverse Young's modulus. Halpin-Tsai relationships have been widely used because of their accuracy in predicting the transverse and shear moduli in FRCs [17,[46][47][48].…”

Section: The Fully Homogenized Peridynamic Modelmentioning

confidence: 99%

A stochastically homogenized peridynamic model for intraply fracture in fiber-reinforced composites

Mehrmashhadi

Chen

Zhao

et al. 2019

Composites Science and Technology

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The quasi-static transverse fracture behavior in unidirectional fiber-reinforced composites (FRCs) is investigated using a new intermediately-homogenized peridynamic (IH-PD) model and a fully homogenized peridynamic (FH-PD) model. The novelty in the IH-PD model here is accounting for the topology of the fiber-phase in the transverse sample loading via a calibration to the Halpin-Tsai model.Both models can capture well the measured load-displacement behavior observed experimentally for intraply fracture, without the need for an explicit representation of microstructure geometry of the FRC.The IH-PD model, however, is more accurate and produces crack path tortuosity as well as a nonmonotonic load-crack-opening softening curve, similar to what is observed experimentally. These benefits come from the preservation of some micro-scale heterogeneity, stochastically generated in the IH-PD model to match the composite's fiber volume fraction, while its computational cost is equivalent to that of an FH-PD model. We also present a three-point bending transverse loading case in which the two models lead to dramatically different failure modes: the FH-PD model shows that failure always starts from the off-center pre-notch, while the IH-PD model, when the pre-notch is sufficiently off-center, finds that the composite fails from the center of the sample, not from the pre-notch. Experiments that can confirm these findings are sought.

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Effects of shape and misalignment of fibers on the failure response of carbon fiber reinforced polymers

et al. 2018

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An integrated computational framework for simulating the failure response of carbon fiber reinforced polymer composites

Cited by 12 publications

References 102 publications

A Finite Element Study to Investigate the Mechanical Behaviour of Unidirectional Recycled Carbon Fibre/Glass Fibre–Reinforced Epoxy Composites

A Finite Element Study to Investigate the Mechanical Behaviour of Unidirectional Recycled Carbon Fibre/Glass Fibre–Reinforced Epoxy Composites

A stochastically homogenized peridynamic model for intraply fracture in fiber-reinforced composites

Effects of shape and misalignment of fibers on the failure response of carbon fiber reinforced polymers

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