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Image-enhanced modelling of residual compressive after impact strength in laminated composites

Image-enhanced modelling of residual compressive after impact strength in laminated composites
Image-enhanced modelling of residual compressive after impact strength in laminated composites
This study implements key mechanisms and parameters observed from the previous compression after impact (CAI) experimental studies into finite element models, to study their effects parametrically on residual compression strength. The mechanisms and parameters include: impact damage area, the role of intact interfaces within the overall damaged region (identified here as the “undamaged cone”), interlaminar toughness, and the extent of permanent out-of-plane deformation. The findings highlight that within the limits observed experimentally, in addition to the size of the damaged area, interlaminar toughness and the extent of permanent out-of-plane deformation strongly affect CAI strength (by up to ~100% for a given damage area), with toughness playing a more significant influence than permanent out-of-plane deformation. For the first time, and contrary to much of the literature, the significant role of the undamaged cone is evidenced and quantified.
Buckling; Finite element analysis (FEA), Computed tomography (CT) analysis, virtual crack closure technique
0263-8223
20-27
Bull, Daniel
3569ba02-89de-4398-a14d-02c3f9b4eab2
Spearing, Simon
9e56a7b3-e0e8-47b1-a6b4-db676ed3c17a
Sinclair, Ian
6005f6c1-f478-434e-a52d-d310c18ade0d
Bull, Daniel
3569ba02-89de-4398-a14d-02c3f9b4eab2
Spearing, Simon
9e56a7b3-e0e8-47b1-a6b4-db676ed3c17a
Sinclair, Ian
6005f6c1-f478-434e-a52d-d310c18ade0d

Bull, Daniel, Spearing, Simon and Sinclair, Ian (2018) Image-enhanced modelling of residual compressive after impact strength in laminated composites. Composite Structures, 192, 20-27. (doi:10.1016/j.compstruct.2018.02.047).

Record type: Article

Abstract

This study implements key mechanisms and parameters observed from the previous compression after impact (CAI) experimental studies into finite element models, to study their effects parametrically on residual compression strength. The mechanisms and parameters include: impact damage area, the role of intact interfaces within the overall damaged region (identified here as the “undamaged cone”), interlaminar toughness, and the extent of permanent out-of-plane deformation. The findings highlight that within the limits observed experimentally, in addition to the size of the damaged area, interlaminar toughness and the extent of permanent out-of-plane deformation strongly affect CAI strength (by up to ~100% for a given damage area), with toughness playing a more significant influence than permanent out-of-plane deformation. For the first time, and contrary to much of the literature, the significant role of the undamaged cone is evidenced and quantified.

Text CAI_model_paper_rev14_M_IS_DJB_v2 - Accepted Manuscript
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More information

Accepted/In Press date: 19 February 2018
e-pub ahead of print date: 21 February 2018
Keywords: Buckling; Finite element analysis (FEA), Computed tomography (CT) analysis, virtual crack closure technique

Identifiers

Local EPrints ID: 418340
URI: https://eprints.soton.ac.uk/id/eprint/418340
ISSN: 0263-8223
PURE UUID: 1d8e9cfd-16ca-431b-b592-3acd6b078cd5
ORCID for Daniel Bull: ORCID iD orcid.org/0000-0001-6711-6153

Catalogue record

Date deposited: 01 Mar 2018 17:30
Last modified: 06 Jun 2018 12:34

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