Improving Performance of Polymer Fiber Reinforced Sandwich X-Joints in Naval Vessels: Part I: Design Aspects

Christian Berggreen, Christian Lundsgaard-Larsen, Kasper Karlsen, Claus Jenstrup, Brian Hayman

Research output: Chapter in Book/Report/Conference proceedingArticle in proceedingsResearchpeer-review


In many naval ships of fiber composite sandwich construction an X-joint exists where the end bulkhead of the superstructure is attached to the deck, with a bulkhead placed in the same vertical plane below the deck. As the hull girder flexes this joint is subjected to alternating tensile and compressive loading in the vertical direction. The paper aims to provide an improved basis for the design of such X-joints, focusing on the prevention of crushing of the core under compressive load. Strain distributions are investigated by both laboratory tests and numerical modeling, and design criteria for core inserts are presented. The tensile loading case is addressed in a companion paper.
Original languageEnglish
Title of host publicationSixteenth International Conference on Composite Materials : A Giant Step towards Environmental Awareness: From Green Composites to Aerospace
EditorsKazuro Kageyama, Takashi Ishikawa, Nobuo Takeda, Masaki Hojo, Sunao Sugimoto, Toshio Ogasawara
Number of pages1432
Place of PublicationTokyo, Japan
PublisherJapan Society for Composite Materials
Publication date2007
ISBN (Print)978-4-931136-06-9
Publication statusPublished - 2007
Event16th International Conference on Composite Materials: A Giant Step towards Environmental Awareness: From Green Composites to Aerospace - Kyoto, Japan
Duration: 8 Jul 200713 Jul 2007
Conference number: 16


Conference16th International Conference on Composite Materials
Internet address

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