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Modelling and quantifying Mode I interlaminar fracture in particle-toughened CFRPs

Modelling and quantifying Mode I interlaminar fracture in particle-toughened CFRPs
Modelling and quantifying Mode I interlaminar fracture in particle-toughened CFRPs
Four-dimensional time-resolved Synchrotron Radiation Computed Tomography (SRCT) has been used to capture Mode I delamination propagation in particle-toughened Carbon Fibre Reinforced Polymers (CFRPs). Digital Volume Correlation (DVC) was used in order to measure ply opening displacements at the crack tip, permitting the interlayer strain ahead of the crack tip to be quantified. Estimates at which toughening particles de-bonded and/or fractured were made, giving insight into the effects of particle type and particle size on the fracture mico-mechanisms. The experiments are complemented by a 2D plane-strain finite element (FE) model, which investigated the effects of particle strength and toughness on the ply opening displacement and crack path by modelling the particles as 1D cohesive segments. Previous work has shown that Mode I crack propagation in particle-toughened interlayers involves a process zone rather than a distinct crack tip. Therefore, Augmented Finite Element Method (A-FEM) elements were used in the simulation, since the elements can account for both bifurcating and merging cracks within a single element. The nodal displacements in the simulation were compared to the DVC results, illustrating a potential path through which more complex FE simulations may be validated against experimental results in the future.
Borstnar, Gregor
d391eccc-0f99-473c-b7ba-e58f8bb952b4
Mavrogordato, Mark
f3e0879b-118a-463a-a130-1c890e9ab547
Yang, Qingda
d3368393-3ed9-4606-bfe7-bd2d5a8cdc94
Sinclair, Ian
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Spearing, Simon
9e56a7b3-e0e8-47b1-a6b4-db676ed3c17a
Borstnar, Gregor
d391eccc-0f99-473c-b7ba-e58f8bb952b4
Mavrogordato, Mark
f3e0879b-118a-463a-a130-1c890e9ab547
Yang, Qingda
d3368393-3ed9-4606-bfe7-bd2d5a8cdc94
Sinclair, Ian
6005f6c1-f478-434e-a52d-d310c18ade0d
Spearing, Simon
9e56a7b3-e0e8-47b1-a6b4-db676ed3c17a

Borstnar, Gregor, Mavrogordato, Mark, Yang, Qingda, Sinclair, Ian and Spearing, Simon (2016) Modelling and quantifying Mode I interlaminar fracture in particle-toughened CFRPs. 17th European Conference on Composite Materials, Germany. 26 - 30 Jun 2016. 7 pp .

Record type: Conference or Workshop Item (Paper)

Abstract

Four-dimensional time-resolved Synchrotron Radiation Computed Tomography (SRCT) has been used to capture Mode I delamination propagation in particle-toughened Carbon Fibre Reinforced Polymers (CFRPs). Digital Volume Correlation (DVC) was used in order to measure ply opening displacements at the crack tip, permitting the interlayer strain ahead of the crack tip to be quantified. Estimates at which toughening particles de-bonded and/or fractured were made, giving insight into the effects of particle type and particle size on the fracture mico-mechanisms. The experiments are complemented by a 2D plane-strain finite element (FE) model, which investigated the effects of particle strength and toughness on the ply opening displacement and crack path by modelling the particles as 1D cohesive segments. Previous work has shown that Mode I crack propagation in particle-toughened interlayers involves a process zone rather than a distinct crack tip. Therefore, Augmented Finite Element Method (A-FEM) elements were used in the simulation, since the elements can account for both bifurcating and merging cracks within a single element. The nodal displacements in the simulation were compared to the DVC results, illustrating a potential path through which more complex FE simulations may be validated against experimental results in the future.

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More information

Accepted/In Press date: 15 March 2016
e-pub ahead of print date: 27 June 2016
Published date: 28 June 2016
Venue - Dates: 17th European Conference on Composite Materials, Germany, 2016-06-26 - 2016-06-30
Organisations: Engineering Mats & Surface Engineerg Gp

Identifiers

Local EPrints ID: 398585
URI: https://eprints.soton.ac.uk/id/eprint/398585
PURE UUID: 7b2e57e8-526c-41b9-a57b-61bb60e3e975
ORCID for Simon Spearing: ORCID iD orcid.org/0000-0002-3059-2014

Catalogue record

Date deposited: 27 Jul 2016 13:59
Last modified: 17 May 2019 00:35

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