Understanding the effect of anisotropy in composite materials on the performance of cruciform specimens

A. Moncy*, O. Castro, C. Berggreen, H. Stang

*Corresponding author for this work

    Research output: Contribution to journalJournal articleResearchpeer-review

    Abstract

    The anisotropic nature of fibre-reinforced composite materials is often not accounted for during the design process of composite cruciform specimens. Here, the response of cruciform specimens depends on both - the layup configuration and the variations in the biaxial loading conditions. This work studies the effect of anisotropy in composite materials on the uniformity of the developed multi-axial stress state in cruciform specimens. For that, a combination of 3D finite element and analytical models are used to analyze the behaviour of 12 different cruciform specimen geometries consisting of different layups and subjected to different biaxial loading conditions. In this study, it is shown how the shape of the gauge zone, the shape of the corners formed by the adjacent arms and the presence of slots in the arms can be used to design cruciform specimens with uniform stress states in the gauge zone, while accounting for the varying anisotropy.
    Original languageEnglish
    Article number114225
    JournalComposite Structures
    Volume273
    Number of pages12
    ISSN0263-8223
    DOIs
    Publication statusPublished - 2021

    Keywords

    • Cruciform specimens
    • Composite materials
    • Finite element analysis
    • Anisopy
    • Multiaxiality

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