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Modelling the variability of skin stiffener debonding in post-cured top-hat stiffened panels

Modelling the variability of skin stiffener debonding in post-cured top-hat stiffened panels
Modelling the variability of skin stiffener debonding in post-cured top-hat stiffened panels
Glass structures are often used in industries utilising large structural topologies. These structures are typically manufactured by post-curing subcomponents together, using a chopped strand mat layer at the interface. To predict failure of these joints requires an accurate assessment of the material and fracture properties. In this paper two industrially manufactured top-hat stiffened panels are tested to determine the fracture behaviour at the component level. This highlights that the variability seen in fracture properties at coupon level is less evident in structural component response. Then a previously developed set of material properties is used to accurately model the structural response, crack initiation and debonding of the panels under four point bend using Finite Element Analysis which gives final failure at 6.2kN and a 4.4% error compared to the experimental results which exhibits final failure at 5.94kN. The specific fracture properties tested and R curve are shown to be critical in assessing crack initiation and propagation with considerable error, 14.5%, provided by data assumed from the literature.
0263-8223
187-195
Yetman, Joanne E.
44eb8f3c-e3f8-47b3-9c9d-410e2c0673b4
Sobey, Adam
e850606f-aa79-4c99-8682-2cfffda3cd28
Blake, James
6afa420d-0936-4acc-861b-36885406c891
Shenoi, Ramanand
a37b4e0a-06f1-425f-966d-71e6fa299960
Yetman, Joanne E.
44eb8f3c-e3f8-47b3-9c9d-410e2c0673b4
Sobey, Adam
e850606f-aa79-4c99-8682-2cfffda3cd28
Blake, James
6afa420d-0936-4acc-861b-36885406c891
Shenoi, Ramanand
a37b4e0a-06f1-425f-966d-71e6fa299960

Yetman, Joanne E., Sobey, Adam, Blake, James and Shenoi, Ramanand (2019) Modelling the variability of skin stiffener debonding in post-cured top-hat stiffened panels. Composite Structures, 211, 187-195. (doi:10.1016/j.compstruct.2018.11.078).

Record type: Article

Abstract

Glass structures are often used in industries utilising large structural topologies. These structures are typically manufactured by post-curing subcomponents together, using a chopped strand mat layer at the interface. To predict failure of these joints requires an accurate assessment of the material and fracture properties. In this paper two industrially manufactured top-hat stiffened panels are tested to determine the fracture behaviour at the component level. This highlights that the variability seen in fracture properties at coupon level is less evident in structural component response. Then a previously developed set of material properties is used to accurately model the structural response, crack initiation and debonding of the panels under four point bend using Finite Element Analysis which gives final failure at 6.2kN and a 4.4% error compared to the experimental results which exhibits final failure at 5.94kN. The specific fracture properties tested and R curve are shown to be critical in assessing crack initiation and propagation with considerable error, 14.5%, provided by data assumed from the literature.

Text
Yetman FEA CS_corrections - Accepted Manuscript
Restricted to Repository staff only until 5 December 2019.
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More information

Accepted/In Press date: 29 November 2018
e-pub ahead of print date: 5 December 2018
Published date: 1 March 2019

Identifiers

Local EPrints ID: 426862
URI: https://eprints.soton.ac.uk/id/eprint/426862
ISSN: 0263-8223
PURE UUID: 83fc08a5-23ef-4348-a2de-b6cd80476ad8
ORCID for Adam Sobey: ORCID iD orcid.org/0000-0001-6880-8338

Catalogue record

Date deposited: 14 Dec 2018 17:30
Last modified: 20 Jul 2019 00:52

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