Dynamic debonding in layered structures: A coupled ALE-cohesive approach

Marco Francesco Funari, Fabrizio Greco, Paolo Lonetti

    Research output: Contribution to journalArticlepeer-review

    11 Citations (Scopus)

    Abstract

    A computational formulation able to simulate crack initiation and growth in layered structural systems is proposed. In order to identify the position of the onset interfacial defects and their dynamic debonding mechanisms, a moving mesh strategy, based on Arbitrary Lagrangian-Eulerian (ALE) approach, is combined with a cohesive interface methodology, in which weak based moving connections are implemented by using a finite element formulation. The numerical formulation has been implemented by means of separate steps, concerned, at first, to identify the correct position of the crack onset and, subsequently, the growth by changing the computational geometry of the interfaces. In order to verify the accuracy and to validate the proposed methodology, comparisons with experimental and numerical results are developed. In particular, results, in terms of location and speed of the debonding front, obtained by the proposed model, are compared with the ones arising from the literature. Moreover, a parametric study in terms of geometrical characteristics of the layered structure are developed. The investigation reveals the impact of the stiffening of the reinforced strip and of adhesive thickness on the dynamic debonding mechanisms.
    Original languageEnglish
    Pages (from-to)524-535
    Number of pages12
    JournalFrattura ed Integrita Strutturale
    Volume11
    Issue number41
    Early online date28 Jun 2017
    DOIs
    Publication statusPublished - Jul 2017

    Keywords

    • ALE
    • Crack onset
    • Debonding
    • Dynamic delamination
    • FEM
    • Computational geometry
    • Cracks
    • Failure (mechanical)
    • Finite element method
    • Adhesive thickness
    • Arbitrary Lagrangian Eulerian
    • Computational formulations
    • Crack onsets
    • Finite element formulations
    • Geometrical characteristics
    • Interfacial defect
    • Numerical formulation
    • Dynamics

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