Assessment of hyperelastic material models for the application of adhesive point-fixings between glass and metal

J. Dispersyn, S. Hertelé, W. De Waele, J. Belis

    Research output: Contribution to journalArticleAcademicpeer-review

    21 Citations (Scopus)

    Abstract

    For the investigation of adhesive point-fixings a computationally demanding finite element model is required. The accuracy of the numerical results depends highly on the validity of the used material models, which describe the deformation behaviour of the adhesive. The material models are derived from curve-fitting the mathematical expressions to experimental data mostly derived from uniaxial and equibiaxial experiments. In literature the suitability of the used material models is determined by comparing the numerical results from the same uniaxial and equibiaxial experiments to the experimental results. In contrast, in this contribution, the material models are validated by two additional validation experiments, i.e. an adhesive point-fixing loaded in uniaxial tension and an adhesive point-fixing loaded in a combination of tension and shear. After comparison of the numerical and experimental displacements, it appears that the material models that are calibrated by shear tests or by a combination of shear tests yield the best results. In addition, most numerical load-displacement curves have an almost linear gradient at small strains. Such behaviour is also demonstrated in the experimental measurements of the deformation.

    Original languageEnglish
    Pages (from-to)102-117
    Number of pages16
    JournalInternational Journal of Adhesion and Adhesives
    Volume77
    DOIs
    Publication statusPublished - 1 Sep 2017

    Keywords

    • Adhesive point-fixings
    • C. Finite element stress analysis
    • D. Mechanical properties of adhesives
    • Hyperelastic material models

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