Nondestructive Detection of Damage in Woven Fabric Composite Laminate Using Energy Index Method

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著者

    • Hu Huiwen HU Huiwen
    • Composite Materials and Lightweight Structures Laboratory, National Pingtung University of Science and Technology
    • Wang Jieming WANG Jieming
    • Composite Materials and Lightweight Structures Laboratory, National Pingtung University of Science and Technology

抄録

This paper presents the detection of surface crack in a woven fabric composite laminate using energy index method. A carbon fabric F3T-282⁄epoxy (DICY) is used to fabricate a plain woven laminate. In the first place, the unknown material properties can be obtained by employing inverse method through the finite element analysis. Three equivalent FE models, i.e. cross-ply [0⁄90]<SUB>ns</SUB> , orthotropic and representative cell models are established to simulate the woven laminate. Experimental modal analysis is performed to obtain the modal displacements of the laminate before and after damage. The modal displacements are used to compute the modal strain energies. A damage index is defined by using the fractional modal strain energy and used to identify the surface crack location. Limited by grid points of measurement, a differential quadrature method is applied to compute the partial differential terms in strain energy formula. Only few measured mode shapes are required in this approach. This method provides a flexible, cost effective, nondestructive, and feasible of real-time detection of potential damage in woven fabric composite laminates.

収録刊行物

  • 実験力学 : journal of JSEM  

    実験力学 : journal of JSEM 8, 120-126, 2008-06-25 

    The Japanese Society for Experimental Mechanics

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各種コード

  • NII論文ID(NAID)
    10021156167
  • NII書誌ID(NCID)
    AA11822914
  • 本文言語コード
    ENG
  • 資料種別
    ART
  • ISSN
    13464930
  • NDL 記事登録ID
    9568245
  • NDL 雑誌分類
    ZM17(科学技術--科学技術一般--力学・応用力学)
  • NDL 請求記号
    Z74-C355
  • データ提供元
    CJP書誌  NDL  J-STAGE 
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