Compression strength of sandwich panels with sub-interface damage in the foam core

V. Koysin, Andrey Shipsha, Vitaly Skvortsov

Research output: Contribution to journalArticleAcademic

19 Citations (Scopus)


This paper addresses the effect of a local quasi-static indentation or a low-velocity impact on the residual strength of foam core sandwich panels subjected to edgewise compression. The damage is characterized by a local zone of crushed core accompanied by a residual dent in the face sheet. Experimental studies show that such damage can significantly alter the compressive strength. Theoretical analysis of the face sheet local bending is performed for two typical damage modes (with or without a face–core debonding). The solutions allow estimation of the onset of (a) an unstable dent growth (local buckling) or (b) a compressive failure in the face sheet. The theoretical results are in agreement with the test data for two considered sandwich configurations.
Original languageUndefined
Pages (from-to)2231-2240
JournalComposites science and technology
Issue number13
Publication statusPublished - 2009


  • IR-75530
  • Damage tolerance
  • Residual dent
  • Sandwich
  • Local damage
  • Local buckling
  • Crushed foam

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