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Interfacial crack arrest in sandwich panels with embedded crack stoppers subjected to fatigue loading

Interfacial crack arrest in sandwich panels with embedded crack stoppers subjected to fatigue loading
Interfacial crack arrest in sandwich panels with embedded crack stoppers subjected to fatigue loading
A novel crack arresting device has been implemented in sandwich panels and tested using a special rig to apply out-of-plane loading on the sandwich panel face-sheets. Fatigue crack propagation was induced in the face-core interface of the sandwich panels which met the crack arrester. The effect of the embedded crack arresters was evaluated in terms of the achieved enhancement of the damage tolerance of the tested
sandwich panels. A finite element (FE) model of the experimental setup was used for predicting propagation rates and direction of the crack growth. The FE simulation was based on the adoption of linear fracture mechanics and a fatigue propagation law (i.e. Paris law) to predict the residual fatigue life-time and behaviour of the test specimens. Finally, a comparison between the experimental results and the numerical simulations was made to validate the numerical predictions as well as the overall performance of the crack arresters.
0929-189X
1-22
Martakos, G.
f86cb0d3-d151-4bc0-a0cb-91013165545f
Andreasen, C.
20a44b18-b801-437b-9d17-7bd8438b7539
Berggreen, C.
f1a34d7a-9f2c-494a-85a3-0f5ad6968cb2
Thomsen, O.
f3e60b22-a09f-4d58-90da-d58e37d68047
Martakos, G.
f86cb0d3-d151-4bc0-a0cb-91013165545f
Andreasen, C.
20a44b18-b801-437b-9d17-7bd8438b7539
Berggreen, C.
f1a34d7a-9f2c-494a-85a3-0f5ad6968cb2
Thomsen, O.
f3e60b22-a09f-4d58-90da-d58e37d68047

Martakos, G., Andreasen, C., Berggreen, C. and Thomsen, O. (2016) Interfacial crack arrest in sandwich panels with embedded crack stoppers subjected to fatigue loading. Applied Composite Materials, 1-22. (doi:10.1007/s10443-016-9514-3).

Record type: Article

Abstract

A novel crack arresting device has been implemented in sandwich panels and tested using a special rig to apply out-of-plane loading on the sandwich panel face-sheets. Fatigue crack propagation was induced in the face-core interface of the sandwich panels which met the crack arrester. The effect of the embedded crack arresters was evaluated in terms of the achieved enhancement of the damage tolerance of the tested
sandwich panels. A finite element (FE) model of the experimental setup was used for predicting propagation rates and direction of the crack growth. The FE simulation was based on the adoption of linear fracture mechanics and a fatigue propagation law (i.e. Paris law) to predict the residual fatigue life-time and behaviour of the test specimens. Finally, a comparison between the experimental results and the numerical simulations was made to validate the numerical predictions as well as the overall performance of the crack arresters.

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More information

Accepted/In Press date: 29 June 2016
e-pub ahead of print date: 18 August 2016
Additional Information: Funded by Danish Council for Independent Research: Enhanced Performance of Sandwich Structures by Improved Damage Tolerance (10082020)
Organisations: Infrastructure Group

Identifiers

Local EPrints ID: 398343
URI: http://eprints.soton.ac.uk/id/eprint/398343
ISSN: 0929-189X
PURE UUID: b742a92a-a724-4048-ad22-e6d265c68b29

Catalogue record

Date deposited: 22 Jul 2016 12:03
Last modified: 15 Mar 2024 05:45

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Contributors

Author: G. Martakos
Author: C. Andreasen
Author: C. Berggreen
Author: O. Thomsen

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