Accepted for publication in Journal of Sandwich Structures and Materials, 2016 Corresponding Author: Ole T. Thomsen, Faculty of Engineering and the Environment, University of Southampton, Highfield, Southampton, UK Email: [email protected] , web page: http://www.soton.ac.uk/engineering/ Experimental Investigation of Interfacial Crack Arrest in Sandwich Beams Subjected to Fatigue Loading using a Novel Crack Arresting Device G. Martakos 1 , J.H. Andreasen 1 , C. Berggreen 2 , O.T. Thomsen 3,1