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Experimental investigation of interfacial crack arrest in sandwich beams subjected to fatigue loading using a novel crack arresting device

Experimental investigation of interfacial crack arrest in sandwich beams subjected to fatigue loading using a novel crack arresting device
Experimental investigation of interfacial crack arrest in sandwich beams subjected to fatigue loading using a novel crack arresting device
A recently proposed face-sheet/core interface crack arresting device is implemented in sandwich beams and tested using the Sandwich Tear Test (STT) configuration. Fatigue loading conditions are applied to propagate the crack and determine the effect of the crack stopper on the fatigue growth rate and arrest of the crack. Digital image correlation is used through the duration of the fatigue experiment to track the strain evolution as the crack tip advances. The measured strains are related to crack tip propagation, arrest, and re-initiation of the crack. A finite element model is used to calculate the energy release rate, mode mixity and to simulate crack propagation and arrest of the crack. Finally the effectiveness of the crack arresting device is demonstrated on composite sandwich beams subjected to fatigue loading conditions.
1530-7972
1-21
Martakos, G.
f86cb0d3-d151-4bc0-a0cb-91013165545f
Andreasen, J.H.
23c7ab0d-3ce8-4b60-aae5-16b669a53e74
Berggreen, C.
f1a34d7a-9f2c-494a-85a3-0f5ad6968cb2
Thomsen, O.
f3e60b22-a09f-4d58-90da-d58e37d68047
Martakos, G.
f86cb0d3-d151-4bc0-a0cb-91013165545f
Andreasen, J.H.
23c7ab0d-3ce8-4b60-aae5-16b669a53e74
Berggreen, C.
f1a34d7a-9f2c-494a-85a3-0f5ad6968cb2
Thomsen, O.
f3e60b22-a09f-4d58-90da-d58e37d68047

Martakos, G., Andreasen, J.H., Berggreen, C. and Thomsen, O. (2017) Experimental investigation of interfacial crack arrest in sandwich beams subjected to fatigue loading using a novel crack arresting device. Journal of Sandwich Structures and Materials, 1-21. (doi:10.1177/1099636217695057).

Record type: Article

Abstract

A recently proposed face-sheet/core interface crack arresting device is implemented in sandwich beams and tested using the Sandwich Tear Test (STT) configuration. Fatigue loading conditions are applied to propagate the crack and determine the effect of the crack stopper on the fatigue growth rate and arrest of the crack. Digital image correlation is used through the duration of the fatigue experiment to track the strain evolution as the crack tip advances. The measured strains are related to crack tip propagation, arrest, and re-initiation of the crack. A finite element model is used to calculate the energy release rate, mode mixity and to simulate crack propagation and arrest of the crack. Finally the effectiveness of the crack arresting device is demonstrated on composite sandwich beams subjected to fatigue loading conditions.

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Accepted/In Press date: 12 September 2016
e-pub ahead of print date: 1 March 2017
Organisations: Infrastructure Group

Identifiers

Local EPrints ID: 402432
URI: http://eprints.soton.ac.uk/id/eprint/402432
ISSN: 1530-7972
PURE UUID: dc8ebf32-b7a4-473e-9ec2-fb2112b68d9d

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Date deposited: 09 Nov 2016 11:51
Last modified: 15 Mar 2024 06:03

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Contributors

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

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