Damage modeling of notched graphite/epoxy sandwich panels in compression
Damage modeling of notched graphite/epoxy sandwich panels in compression
Open-hole honeycomb sandwich panels with woven graphite/epoxy facesheets and Nomextrade cores were tested uniaxially in compression to characterize their damage tolerance. A plain weave T-300 graphite fiber fabric was used for the facesheets in two stacking sequences: [45/02] and [03]. Observations of macroscopic sub-critical damage behavior were different in the two material systems. Linear damage zones (LDZ), consisting of fiber micro-buckles and extensive delamination, were typically observed in the [03] material. The [45/02] 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. Modeling of these apparently distinct failure modes, and comparison to experimental data, revealed that the only mode representative of damage tolerant behavior is linear damage zone formation and propagation for both material systems, and that the delamination/bulge behavior is a secondary phenomenon.
linear damage zone, kink-band, micro-buckling, delamination-buckling, damage tolerance, graphite, honeycomb sandwich panel, compression
191-216
Mirazo, José M.
2d217e7b-8b8b-4f6a-a31b-6804948bbb1e
Spearing, S. Mark
9e56a7b3-e0e8-47b1-a6b4-db676ed3c17a
2001
Mirazo, José M.
2d217e7b-8b8b-4f6a-a31b-6804948bbb1e
Spearing, S. Mark
9e56a7b3-e0e8-47b1-a6b4-db676ed3c17a
Mirazo, José M. and Spearing, S. Mark
(2001)
Damage modeling of notched graphite/epoxy sandwich panels in compression.
Applied Composite Materials, 8 (3), .
(doi:10.1023/A:1011272028561).
Abstract
Open-hole honeycomb sandwich panels with woven graphite/epoxy facesheets and Nomextrade cores were tested uniaxially in compression to characterize their damage tolerance. A plain weave T-300 graphite fiber fabric was used for the facesheets in two stacking sequences: [45/02] and [03]. Observations of macroscopic sub-critical damage behavior were different in the two material systems. Linear damage zones (LDZ), consisting of fiber micro-buckles and extensive delamination, were typically observed in the [03] material. The [45/02] 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. Modeling of these apparently distinct failure modes, and comparison to experimental data, revealed that the only mode representative of damage tolerant behavior is linear damage zone formation and propagation for both material systems, and that the delamination/bulge behavior is a secondary phenomenon.
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Published date: 2001
Keywords:
linear damage zone, kink-band, micro-buckling, delamination-buckling, damage tolerance, graphite, honeycomb sandwich panel, compression
Identifiers
Local EPrints ID: 23082
URI: http://eprints.soton.ac.uk/id/eprint/23082
ISSN: 0929-189X
PURE UUID: ca1127fc-68ac-4534-ab54-764fbbaca112
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Date deposited: 10 Mar 2006
Last modified: 16 Mar 2024 03:37
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Author:
José M. Mirazo
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