Control of free-edge interlaminar stresses in composite laminates using piezoelectric actuators

Bin Huang, Heung Soo Kim

Research output: Contribution to journalArticlepeer-review

4 Scopus citations

Abstract

The control of free-edge interlaminar stresses in laminated composite structures using a stress function-based approach is proposed. The assumed stress fields satisfy pointwise traction and free boundary conditions at surfaces. Governing equations are derived using the principle of complementary virtual work. A general eigenvalue solution procedure was adopted to obtain accurate stress states of the laminated composite structure. The results obtained from the proposed method were compared with those obtained by three-dimensional finite element analyses. It was found that interlaminar stresses generated by mechanical loadings could be significantly reduced by applying proper electric fields to piezoelectric actuators, which were surface bonded or embedded in composite laminates. Locations of piezoelectric actuators also influenced the distributions of interlaminar stresses. The results provided that piezoelectric actuators have potential in the application to actively control interlaminar stresses in composite laminates.

Original languageEnglish
Article number074002
JournalSmart Materials and Structures
Volume23
Issue number7
DOIs
StatePublished - Jul 2014

Keywords

  • composite laminates
  • control
  • free edge
  • interlaminar stress
  • piezoelectric actuator

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