Detection of Delamination Damage in a Composite Laminate Beam Utilising the Principle of Strain Compatibility

Stuart Wildy, Benjamin Cazzolato, Andrei Kotousov

    Research output: Contribution to journalArticle

    4 Citations (Scopus)

    Abstract

    This paper presents an experimental investigation of a new method for damage detection based on the most fundamental concept in continuum mechanics: strain compatibility. Compliance with this principle implies a deformed material is free from discontinuities, which are indicative of many types of structural damage. Therefore the principle of strain compatibility, in its ability toidentify discontinuities, is very promising as a new foundation for future research into nondestructive evaluation and structural health monitoring technologies. The proposed method has many advantages compared to existing damage detection techniques, such as its invariance to material properties, type and intensity of loading, and the geometry of the structure. In this paper, a proposed formulation of the strain compatibility equation for beam structures, which is invariant to loading intensity, is presented. An experimental investigation of the proposed algorithm was conducted on a delaminated cantilever beam, utilising a PSV-3D scanning laser vibrometer. The experiment demonstrated that the strain compatibility technique can accurately locate delamination damage in composite beam structures.

    Original languageEnglish
    Pages (from-to)269-272
    Number of pages4
    JournalKey Engineering Materials
    Volume417-418
    DOIs
    Publication statusPublished - 2010

    Keywords

    • Damage detection
    • Delamination
    • Non-destructive evaluation
    • Scanning laser vibrometer
    • Strain compatibility
    • Structural health monitoring

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