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Applied Composite Materials
Published in: Applied Composite Materials 1/2017

18-08-2016

Interfacial Crack Arrest in Sandwich Panels with Embedded Crack Stoppers Subjected to Fatigue Loading

Authors: G. Martakos, J. H. Andreasen, C. Berggreen, O. T. Thomsen

Published in: Applied Composite Materials | Issue 1/2017

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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.
previous article Effect of Piezoelectric Implant on the Structural Integrity of Composite Laminates Subjected to Tensile Loads
next article Mechanical Properties and Strength Criteria of Fabric Membrane for the Stratospheric Airship Envelope

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Metadata
Title
Interfacial Crack Arrest in Sandwich Panels with Embedded Crack Stoppers Subjected to Fatigue Loading
Authors
G. Martakos
J. H. Andreasen
C. Berggreen
O. T. Thomsen
Publication date
18-08-2016
Publisher
Springer Netherlands
Published in
Applied Composite Materials / Issue 1/2017
Print ISSN: 0929-189X
Electronic ISSN: 1573-4897
DOI
https://doi.org/10.1007/s10443-016-9514-3

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