Micromechanical modelling for wood–fibre reinforced plastics in which the fibres are neither stiff nor rod-like

Newman, Roger H.; Hébert, Philippe; Dickson, Alan R.; Even, Damien; Fernyhough, Alan; Sandquist, David

doi:10.1016/j.compositesa.2014.05.012

Cited by 13 publications

(12 citation statements)

References 27 publications

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“…The Halpin-Tsai model 38,39 is a composite model that represents the elastic modulus of a short fiber reinforced composite material, and many applications of this model have been seen recently. 40,41 9, the results for the parallel model (3) and the series rule (4) do not agree with the measured values. Therefore, we explored the Halpin-Tsai model.…”

Section: Reinforcement Mechanismmentioning

confidence: 79%

“…As typical models, the series rule is shown in Equation ), and the Halpin–Tsai model is given by Equation ). The Halpin–Tsai model 38,39 is a composite model that represents the elastic modulus of a short fiber reinforced composite material, and many applications of this model have been seen recently 40,41

\frac{1}{normalE' normalc} = \frac{V normalm}{normalE' normalm} + \frac{V normalf}{normalE' normalf}

normalE' normalc = \frac{normalE' normalm ((), 1 + normalξ ∙ normalη ∙ V normalf)}{(1 - η ∙ V f)}

where η = (E′ f /E′ m – 1)/(E′ f /E′ m + ξ ), ξ = 2(L/D)…”

Section: Resultsmentioning

confidence: 99%

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Preparation of high‐performance carbon nanotube/polyamide composite materials by elastic high‐shear kneading and improvement of properties by induction heating treatment

Noguchi

Niihara

Kawamoto

et al. 2021

J of Applied Polymer Sci

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Polyamide 66 (PA66) nanocomposites were prepared by compounding carbon nanotubes (CNTs) using an elastic high‐shear kneading method, and the mechanism to understand their excellent properties was verified. In addition, we developed a microwave heat treatment that increases toughness quickly and at low cost. By combining 6.6 vol% or more of CNTs, PA66 with improved mechanical properties, such as higher elastic modulus and yield strength, was achieved, making it possible to obtain a composite having excellent high‐temperature characteristics that does not melt even at a temperature above the melting point. These effects appeared to be due to defibration of CNT aggregates and isolation and dispersion in PA66. A lamellar crystal of PA66 grows around the CNT, forming an interphase. The higher performance appeared to be attributable to a continuous three‐dimensional structure in which CNTs are bound via the interphase, and the improvement of the elastic modulus of the composite material was tentatively ascribed to a Halpin‐Tsai model in which the size of the unit cell of the three‐dimensional structure is introduced. The resulting CNT/PA66 composite materials are superior not only in performance but also in price.

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Section: Reinforcement Mechanismmentioning

confidence: 79%

\frac{1}{normalE' normalc} = \frac{V normalm}{normalE' normalm} + \frac{V normalf}{normalE' normalf}

normalE' normalc = \frac{normalE' normalm ((), 1 + normalξ ∙ normalη ∙ V normalf)}{(1 - η ∙ V f)}

where η = (E′ f /E′ m – 1)/(E′ f /E′ m + ξ ), ξ = 2(L/D)…”

Section: Resultsmentioning

confidence: 99%

Preparation of high‐performance carbon nanotube/polyamide composite materials by elastic high‐shear kneading and improvement of properties by induction heating treatment

Noguchi

Niihara

Kawamoto

et al. 2021

J of Applied Polymer Sci

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“…Despite their attractive in‐plane mechanical properties, most traditional UHMWPE fiberRP laminates suffer from a relatively poor out‐of‐plane performance . A great body of research has been devoted to improving the through‐thickness properties of FRPs …”

Section: Introductionmentioning

confidence: 99%

Enhanced surface free energy of UHMWPE fibers and its interfacial adhesion behavior to PI resins

Chang

Huang

et al. 2018

Surface & Interface Analysis

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Mechanical properties of composites made up of ultra-high-molecular-weight polyethylene (UHMWPE) fiber, polyimide (PI), and TiO 2 particles were investigated. The hybrid composite of 20 vol% of UHMWPE fiber with TiO 2 showed tensile strength greater than UHMWPE fiber/PI composite. A positive hybrid effect in tensile strength is obtained. It is observed that addition of small amount of TiO 2 to UHMWPE fiber/PI increased the tensile strength of the composite by 28%. With increase in TiO 2 loading to 1 to 3 vol%, the impact strength of the hybrid composite is increased from 55 KJ/m 2 to 69 KJ/m 2 . This maximum value is more than one and a half times greater than the impact strength of neat UHMWPE fiber/PI composite. KEYWORDS hybrid effect, impact, polyimide, TiO 2 , UHMWPE fiber 1 | INTRODUCTION Polymer-matrix composites have established themselves as attractive alternatives to the once metal-dominated domain of structural components. Their use has been successfully integrated into key applications in wind energy, transportation, and aerospace industries. High specific stiffness and strength-to-weight ratios, corrosion resistance,

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“…This kind of composite has been mainly modeled and considered via analytical approaches. 14,26,29–31 Therefore, this paper aims to predict, by a hyperelastic approach in combination with an FE model, the uniaxial tensile mechanical response of three WPCs which were formulated with sawdust of three wood species (pine, walnut, and the cherry tree). The proposed method seeks to simplify the use of numerical models to evaluate the stress and strain of WPCs using only tensile testing experimental data.…”

Section: Introductionmentioning

confidence: 99%

Numerical analysis of wood-high-density polyethylene composites: A hyperelastic approach

Rodríguez-Sánchez

Vega‐Rios

Flores-Gallardo

et al. 2018

Journal of Composite Materials

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The application of a hyperelastic approach to simulate the tensile mechanical behavior of wood fiber/polymer composites is proposed. This research was conducted with the purpose of selecting the theoretical model that best fits the experimental data for use in the finite element model. The analyses by the four strain energy density functions (Polynomial, Ogden, Yeoh, and Marlow models) and the Cauchy-Green tensor invariants were used as the theoretical models. The experimental mechanical behavior of three wood fiber/polymer composites formulated with high-density polyethylene as the polymer matrix, and pine, cherry, and walnut sawdust as the fillers, at a concentration of 40 wt%, was evaluated. Experimental data showed that with filler addition, the tensile modulus of the high-density polyethylene matrix increased almost 131% regarding the neat high-density polyethylene; however, no significant differences were found respecting the kind of sawdust. Nevertheless, it was found that the elongation (%) at break was higher when walnut sawdust was employed. As for the strain energy density function analyses, the best approximation to the experimental data was achieved by the Marlow model, because this model only demands the sum of the principal extension ratios for a polymer-based material, I1. The numerical results showed that the proposed finite element model predicts the response with less than 1% error, regarding the experimental data, and consequently the use of the finite element models was simplified for the prediction of the tensile mechanical behavior of this kind of composites.

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Micromechanical modelling for wood–fibre reinforced plastics in which the fibres are neither stiff nor rod-like

Cited by 13 publications

References 27 publications

Preparation of high‐performance carbon nanotube/polyamide composite materials by elastic high‐shear kneading and improvement of properties by induction heating treatment

Preparation of high‐performance carbon nanotube/polyamide composite materials by elastic high‐shear kneading and improvement of properties by induction heating treatment

Enhanced surface free energy of UHMWPE fibers and its interfacial adhesion behavior to PI resins

Numerical analysis of wood-high-density polyethylene composites: A hyperelastic approach

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