Identification of the local stiffness reduction of a damaged composite plate using the virtual fields method

J.-H. Kim*, F. Pierron, M. R. Wisnom, K. Syed-Muhamad

*Corresponding author for this work

Research output: Contribution to journalArticle (Academic Journal)peer-review

Abstract

In the present study, a damage detection problem is formulated as the identification of the spatial stiffness distribution in a damaged composite plate. Full-field heterogeneous curvature fields obtained from an optical deflectometry technique are processed by using the virtual fields method adapted to retrieve the 2D stiffness distribution map of a damaged carbon-epoxy plate. The method not only picks up the location of the damage but also provides a fairly good estimate of the stiffness reduction in the damaged area. In this paper, the procedure is described, validated on simulated measurements and some initial experimental results are given. (c) 2007 Elsevier Ltd. All rights reserved.

Original languageEnglish
Pages (from-to)2065-2075
Number of pages11
JournalComposites Part A: Applied Science and Manufacturing
Volume38
Issue number9
DOIs
Publication statusPublished - 2007

Keywords

  • ANISOTROPIC PLATES
  • MATERIAL PARAMETERS
  • damage mechanics
  • IMPACT DAMAGE
  • delamination
  • non-destructive testing
  • VIBRATING PLATES
  • optical properties/techniques

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