Dynamic debonding phenomena in Z-pin reinforced composite laminates

D. Bruno, M.F. Funari, F. Greco, P. Lonetti

    Research output: Chapter in Book/Report/Conference proceedingConference contribution

    Abstract

    A computational formulation based on moving mesh technique and multilayer formulation is developed with the purpose to predict crack onset and evolution of layered structures, strengthened with z-pins. In order to identify the positions of the onset interfacial defects and their dynamic debonding mechanisms, a moving mesh strategy, based on Arbitrary Lagrangian-Eulerian (ALE) approach, is combined with the cohesive interface methodology, in which weak based moving connections are implemented by using the finite element formulation. Despite exiting numerical methodologies based on pure CZM, the present approach reduces nonlinearities involved in the constitutive equations to a small region containing the process zone, leading to a quite stable and efficient procedure to identify the actual solution in terms of both crack initiation and evolution. The analysis is proposed also in dynamic framework, in which the influence of time dependence and the inertial forces are taken into account. In order to verify the accuracy and to validate the proposed methodology, comparisons with existing numerical results are proposed.
    Original languageEnglish
    Title of host publicationAIMETA 2017
    Subtitle of host publicationProceedings of the 23rd Conference of the Italian Association of Theoretical and Applied Mechanics
    PublisherCentro Servizi d'Ateneo
    Pages1776-1784
    Number of pages9
    ISBN (Print)9788894248470
    Publication statusPublished - 2017

    Keywords

    • Dynamic debonding
    • Layered structures
    • Moving mesh method
    • Z-Pins
    • Constitutive equations
    • Cracks
    • Debonding
    • Finite element method
    • Laminated composites
    • Mesh generation
    • Arbitrary Lagrangian Eulerian
    • Computational formulations
    • Finite element formulations
    • Layered Structures
    • Moving mesh techniques
    • Numerical methodologies
    • Dynamics

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