Vertically-aligned short E-glass fibre core sandwich composite: Production and evaluation

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Vertically-aligned short E-glass fibre core sandwich composite: Production and evaluation. / White, Robbie; Machavaram, Venkata R; Fernando, Benjamin A; Paget, Mark A; Prasad, Ashwini; Fernando, Gerard F.

In: Journal of Sandwich Structures and Materials, 27.02.2021, p. 109963622199388.

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@article{5dba8560dd234f009dcff786646eb5ad,
title = "Vertically-aligned short E-glass fibre core sandwich composite: Production and evaluation",
abstract = "This paper reports on the production and evaluation of a new class of “Z-axis” composite sandwich panel where the core consists of a dense array of vertically-aligned, 3 mm long E-glass fibre composite “beams”. The E-glass fibre bundles were aligned using electrostatic charging. A procedure was developed to retain the orientation of the short-fibre bundles whilst they were impregnated and cured with an epoxy/amine resin system. The skins were manufactured from 4-ply carbon/epoxy prepregs with a layup sequence of (0,90)s. The out-of-plane compressive strength of these Z-axis composites was found to be 25.2 and 15.2 times greater than equivalent sandwich panels made with Nomex{\textregistered} and aluminium honeycomb cores respectively. Their compressive strength was found to increase in proportion to the density of the core. Buckling and fracture of the vertically-aligned Z-axis composite were the predominant failure modes observed. The shear and flexural properties of the Z-axis composites were comparable to equivalent honeycomb sandwich panels manufactured from Nomex{\textregistered} and aluminium honeycomb cores.",
keywords = "Sandwich composite, honeycomb, vertically-aligned, impregnation, flatwise compression",
author = "Robbie White and Machavaram, {Venkata R} and Fernando, {Benjamin A} and Paget, {Mark A} and Ashwini Prasad and Fernando, {Gerard F}",
year = "2021",
month = feb,
day = "27",
doi = "10.1177/1099636221993883",
language = "English",
pages = "109963622199388",
journal = "Journal of Sandwich Structures and Materials",
issn = "1099-6362",
publisher = "SAGE Publications",

}

RIS

TY - JOUR

T1 - Vertically-aligned short E-glass fibre core sandwich composite: Production and evaluation

AU - White, Robbie

AU - Machavaram, Venkata R

AU - Fernando, Benjamin A

AU - Paget, Mark A

AU - Prasad, Ashwini

AU - Fernando, Gerard F

PY - 2021/2/27

Y1 - 2021/2/27

N2 - This paper reports on the production and evaluation of a new class of “Z-axis” composite sandwich panel where the core consists of a dense array of vertically-aligned, 3 mm long E-glass fibre composite “beams”. The E-glass fibre bundles were aligned using electrostatic charging. A procedure was developed to retain the orientation of the short-fibre bundles whilst they were impregnated and cured with an epoxy/amine resin system. The skins were manufactured from 4-ply carbon/epoxy prepregs with a layup sequence of (0,90)s. The out-of-plane compressive strength of these Z-axis composites was found to be 25.2 and 15.2 times greater than equivalent sandwich panels made with Nomex® and aluminium honeycomb cores respectively. Their compressive strength was found to increase in proportion to the density of the core. Buckling and fracture of the vertically-aligned Z-axis composite were the predominant failure modes observed. The shear and flexural properties of the Z-axis composites were comparable to equivalent honeycomb sandwich panels manufactured from Nomex® and aluminium honeycomb cores.

AB - This paper reports on the production and evaluation of a new class of “Z-axis” composite sandwich panel where the core consists of a dense array of vertically-aligned, 3 mm long E-glass fibre composite “beams”. The E-glass fibre bundles were aligned using electrostatic charging. A procedure was developed to retain the orientation of the short-fibre bundles whilst they were impregnated and cured with an epoxy/amine resin system. The skins were manufactured from 4-ply carbon/epoxy prepregs with a layup sequence of (0,90)s. The out-of-plane compressive strength of these Z-axis composites was found to be 25.2 and 15.2 times greater than equivalent sandwich panels made with Nomex® and aluminium honeycomb cores respectively. Their compressive strength was found to increase in proportion to the density of the core. Buckling and fracture of the vertically-aligned Z-axis composite were the predominant failure modes observed. The shear and flexural properties of the Z-axis composites were comparable to equivalent honeycomb sandwich panels manufactured from Nomex® and aluminium honeycomb cores.

KW - Sandwich composite

KW - honeycomb

KW - vertically-aligned

KW - impregnation

KW - flatwise compression

U2 - 10.1177/1099636221993883

DO - 10.1177/1099636221993883

M3 - Article

SP - 109963622199388

JO - Journal of Sandwich Structures and Materials

JF - Journal of Sandwich Structures and Materials

SN - 1099-6362

ER -