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Interfacial crack arrest in sandwich beams subjected to fatigue loading using a novel crack arresting device – numerical modelling

Interfacial crack arrest in sandwich beams subjected to fatigue loading using a novel crack arresting device – numerical modelling
Interfacial crack arrest in sandwich beams subjected to fatigue loading using a novel crack arresting device – numerical modelling
A novel crack arresting device is implemented in foam cored composite sandwich beams and tested using the Sandwich Tear Test (STT) configuration. A Finite Element Model of the setup is developed, and the predictions are correlated with observations and results from a recently conducted experimental fatigue test study. Based on a linear elastic fracture mechanics approach, the developed FE model is utilized to simulate crack propagation and arrest in foam cored sandwich beam specimens subjected to fatigue loading conditions. The effect of the crack arresters on the fatigue life is analysed, and the predictive results are subsequently compared with the observations from the previously conducted fatigue tests. The FE model predicts the energy release rate and the mode mixity based on the derived crack surface displacements, utilizing algorithms for the prediction of accelerated fatigue crack growth as well as the strain field evolution in the vicinity of the crack tip on the surface of the sandwich specimens. It is further shown that the developed finite element analysis methodology can be used to gain a deeper insight onto the physics and behavioral characteristics of the novel peel stopper concept, as well as a design tool that can be used for the implementation of crack arresting devises in engineering applications of sandwich components and structures.
1530-7972
422-438
Andreasen, J.H.
23c7ab0d-3ce8-4b60-aae5-16b669a53e74
Berggreen, C.
f1a34d7a-9f2c-494a-85a3-0f5ad6968cb2
Martakos, G.
f86cb0d3-d151-4bc0-a0cb-91013165545f
Thomsen, O.
f3e60b22-a09f-4d58-90da-d58e37d68047
Andreasen, J.H.
23c7ab0d-3ce8-4b60-aae5-16b669a53e74
Berggreen, C.
f1a34d7a-9f2c-494a-85a3-0f5ad6968cb2
Martakos, G.
f86cb0d3-d151-4bc0-a0cb-91013165545f
Thomsen, O.
f3e60b22-a09f-4d58-90da-d58e37d68047

Andreasen, J.H., Berggreen, C., Martakos, G. and Thomsen, O. (2019) Interfacial crack arrest in sandwich beams subjected to fatigue loading using a novel crack arresting device – numerical modelling. Journal of Sandwich Structures and Materials, 21 (2), 422-438. (doi:10.1177/1099636217695058).

Record type: Article

Abstract

A novel crack arresting device is implemented in foam cored composite sandwich beams and tested using the Sandwich Tear Test (STT) configuration. A Finite Element Model of the setup is developed, and the predictions are correlated with observations and results from a recently conducted experimental fatigue test study. Based on a linear elastic fracture mechanics approach, the developed FE model is utilized to simulate crack propagation and arrest in foam cored sandwich beam specimens subjected to fatigue loading conditions. The effect of the crack arresters on the fatigue life is analysed, and the predictive results are subsequently compared with the observations from the previously conducted fatigue tests. The FE model predicts the energy release rate and the mode mixity based on the derived crack surface displacements, utilizing algorithms for the prediction of accelerated fatigue crack growth as well as the strain field evolution in the vicinity of the crack tip on the surface of the sandwich specimens. It is further shown that the developed finite element analysis methodology can be used to gain a deeper insight onto the physics and behavioral characteristics of the novel peel stopper concept, as well as a design tool that can be used for the implementation of crack arresting devises in engineering applications of sandwich components and structures.

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Accepted/In Press date: 12 September 2016
e-pub ahead of print date: 1 March 2017
Published date: February 2019
Organisations: Infrastructure Group

Identifiers

Local EPrints ID: 402431
URI: https://eprints.soton.ac.uk/id/eprint/402431
ISSN: 1530-7972
PURE UUID: eb2fd7b4-e8ef-4105-99df-6a46aae912c2

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Date deposited: 09 Nov 2016 11:47
Last modified: 17 May 2019 04:01

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Contributors

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

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