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Compressive response of notched, woven fabric, face sheet honeycomb sandwich panels

Compressive response of notched, woven fabric, face sheet honeycomb sandwich panels
Compressive response of notched, woven fabric, face sheet honeycomb sandwich panels
Centre notched honeycomb sandwich panels with woven carbon-epoxy face sheets and Nomex™ cores, tested uniaxially in compression, have been analysed to estimate their strength and damage tolerance. A plain weave T-300 carbon fibre fabric was used for the face sheets in two stacking sequences:[45/0/90] and [0/90]. Observations of macroscopic damage behaviour were different in the two layups. Linear damage zones (LDZs), consisting of fibre microbuckles and extensive delamination, were typically observed in the [0/90] material. The [45/0/90] material exhibited a delamination/bulge zone (DBZ), which consisted of an out of plane curved deformation of the outer 45° ply accompanied by a delamination from the interior 0° plies. Modelling of these failure modes and comparison with experimental data showed that the only mode representative of damage tolerant behaviour is LDZ formation and propagation for both material systems, and that the delamination/bulge behaviour is a secondary phenomenon. A linear softening cohesive zone model predicts the notched compressive strength reasonably well.
1465-8011
392-397
Soutis, C.
28cfba8e-7ff1-427d-939d-bb42dd76a7c5
Spearing, S.M.
9e56a7b3-e0e8-47b1-a6b4-db676ed3c17a
Soutis, C.
28cfba8e-7ff1-427d-939d-bb42dd76a7c5
Spearing, S.M.
9e56a7b3-e0e8-47b1-a6b4-db676ed3c17a

Soutis, C. and Spearing, S.M. (2003) Compressive response of notched, woven fabric, face sheet honeycomb sandwich panels. Plastics, Rubber and Composites, 31 (9), 392-397. (doi:10.1179/14658010225006369).

Record type: Article

Abstract

Centre notched honeycomb sandwich panels with woven carbon-epoxy face sheets and Nomex™ cores, tested uniaxially in compression, have been analysed to estimate their strength and damage tolerance. A plain weave T-300 carbon fibre fabric was used for the face sheets in two stacking sequences:[45/0/90] and [0/90]. Observations of macroscopic damage behaviour were different in the two layups. Linear damage zones (LDZs), consisting of fibre microbuckles and extensive delamination, were typically observed in the [0/90] material. The [45/0/90] material exhibited a delamination/bulge zone (DBZ), which consisted of an out of plane curved deformation of the outer 45° ply accompanied by a delamination from the interior 0° plies. Modelling of these failure modes and comparison with experimental data showed that the only mode representative of damage tolerant behaviour is LDZ formation and propagation for both material systems, and that the delamination/bulge behaviour is a secondary phenomenon. A linear softening cohesive zone model predicts the notched compressive strength reasonably well.

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Published date: 2003

Identifiers

Local EPrints ID: 22860
URI: http://eprints.soton.ac.uk/id/eprint/22860
ISSN: 1465-8011
PURE UUID: 1dadee35-73e0-415f-8624-3a960c6a962b
ORCID for S.M. Spearing: ORCID iD orcid.org/0000-0002-3059-2014

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Date deposited: 10 Mar 2006
Last modified: 16 Mar 2024 03:37

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Contributors

Author: C. Soutis
Author: S.M. Spearing ORCID iD

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