Characterization of delamination in laminated composites based on damage indices

Heung Soo Kim, Jaehwan Kim, Seung Bok Choi

Research output: Contribution to journalArticlepeer-review

Abstract

A modal strain based damage index is proposed to investigate the damage effects of discrete delaminations in a laminated composite structure. The Fermi-Dirac distribution function is incorporated with an improved layerwise laminate theory to model smooth transition of the displacement and the strain fields at the delaminated interfaces. Modal analysis is conducted to investigate dynamic effects of delamination in a laminated structure and to obtain modal strains. The damage index is calculated based on fundamental modal strains of laminated structures. The damage effects of laminated structures are investigated using arbitrary size, number, location and boundary conditions of discrete delaminations.

Original languageEnglish
Pages (from-to)925-929
Number of pages5
JournalKey Engineering Materials
Volume321-323 II
DOIs
StatePublished - 2006

Keywords

  • Composite Laminates
  • Damage Index
  • Delamination
  • Fermi-Dirac Distribution Function
  • Modal Strain

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