On the interaction of delamination buckling and damage growth in cross-ply laminates

Anton Koellner* (Corresponding Author), Maria Kashtalyan, Igor Guz, Christina Völlmecke

*Corresponding author for this work

Research output: Contribution to journalArticle

Abstract

The compressive behaviour of cross-ply laminates with delaminations and matrix cracked layers is investigated by means of an analytical modelling approach. Insight into the post-buckling and damage growth behaviour is obtained owing to comprehensive parametric studies varying delamination length and depth as well as matrix crack density for cross-ply laminates with different layups. The efficient modelling approach comprises the well-known total potential energy principle and the Equivalent Constrained Model for determining reduced stiffness properties depending on the matrix crack density. Thus, unlike previous studies on delamination buckling, the effect of matrix cracked layers is taken into consideration. The analysis of the energy release rates for delamination and matrix crack growth enables the identification of configurations (e.g. delamination depth and length, total thickness of the laminates) which are prone to delamination growth and matrix crack growth, respectively. Beyond that, relationships between post-buckling and damage growth behaviour are identified and discussed.
Original languageEnglish
Pages (from-to)912-928
Number of pages17
JournalInternational Journal of Solids and Structures
Volume202
Early online date20 Jun 2020
DOIs
Publication statusPublished - 1 Oct 2020

Keywords

  • delamination buckling
  • matrix cracks
  • energy release rate
  • post-buckling
  • cross-ply laminates
  • BVID
  • Energy release rate
  • Delamination buckling
  • Post-buckling
  • Cross-ply laminates
  • Matrix cracks
  • MATRIX CRACKING
  • TRANSVERSE CRACKING
  • COMPOSITES
  • PLATES
  • COMPRESSIVE STRENGTH
  • FAILURE
  • IMPACT
  • STIFFNESS
  • POSTBUCKLING BEHAVIOR

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