Static behavior of three-dimensional integrated core sandwich composites subjected to three-point bending

KARAHAN M. , Gul H. , KARAHAN N. , Ivens J.

JOURNAL OF REINFORCED PLASTICS AND COMPOSITES, vol.32, no.9, pp.664-678, 2013 (Journal Indexed in SCI) identifier identifier

  • Publication Type: Article / Article
  • Volume: 32 Issue: 9
  • Publication Date: 2013
  • Doi Number: 10.1177/0731684412474857
  • Page Numbers: pp.664-678
  • Keywords: Three-dimensional integrated sandwich composites, three-point bending, damage tolerance, 3D ORTHOGONAL WEAVE, TENSILE PROPERTIES, FOAM CORE, MECHANICAL PERFORMANCE, PART 1, WOVEN, PANELS, BEAMS


In the current study, the effect of the thickness and the foam density in three-dimensional integrated woven sandwich composites on quasi-static mechanical properties under three-point bending was investigated. Bending modulus and core shear modulus were determined by subjecting the samples, which were cut with varying span lengths according to their core thicknesses, to three-point bending test. Obtained results were optimized by taking core thickness, foam density and panel weights into consideration. Damages that occurred on the tested samples were reported. When compared to conventional foam core sandwich composites, it was found that three-dimensional integrated sandwich composites have superior mechanical properties and due to the fact that the pile yarns in the core and the foam support each other, contrary to conventional sandwich composites no catastrophic core breakage occurs under load, thus the load bearing capacity of the structure is sustained.