Effects of face sheet damage on residual strength of GRP sandwich panels in naval ships

Brian Hayman (Invited author), Andreas T. Echtermeyer (Invited author), Christian Berggreen (Invited author)

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


Extensive studies have been previously carried out on the effects of various types of local damage on the performance of sandwich panels used in the hull structures of naval ships. Recently the approach has been adapted for application on board a specific ship series. Strength reduction data have been obtained for a set of sandwich materials that are representative for the vessels in question. The face sheet materials are glass-reinforced plastics (GRP) with non-crimp fabrics and two different types of vinylester resin. The core materials are PVC foams. Impact damage by sharp and blunt objects is represented by machined cracks and circular holes in the face laminates. Tests have been performed on laminate specimens with and without circular holes under tensile loading and on sandwich face sheets with holes, cracks and real impact damage under compressive loading. The results are compared with available damage models and curves are proposed for representing the reduction in residual strength in the presence of impact damage of varying sizes.
Original languageEnglish
Title of host publicationICSS 9
EditorsG. Ravichandran
Publication date2010
Publication statusPublished - 2010
Event9th International Conference on Sandwich Structures - Pasadena, CA, United States
Duration: 14 Jun 201016 Jun 2010
Conference number: 9


Conference9th International Conference on Sandwich Structures
Country/TerritoryUnited States
CityPasadena, CA


  • Sandwich panels
  • Impact damage
  • Face sheet damage
  • Compression after impact


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