Cohesive zone modelling and the fracture process of structural tape

Ulf Stigh, Anders Biel, Daniel Svensson

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    Abstract

    Structural tapes provide comparable toughness as structural adhesives at orders of magnitude lower stresses. This is potentially useful to minimize the effects of differences in thermal expansion in the joining of mixed materials. The strength properties are modelled using the cohesive zone model. Thus, a cohesive zone represents the tape, i.e. stresses in the tape are transmitted to the substrates through tractions determined by the separations of the surfaces of substrates. This simplification allows for structural analysis of large complex structures. The relation between the traction and the separation is measured experimentally using methods based on the path independence of the J-integral. Repeated experiments are performed at quasi-static loading. A mixed mode cohesive law is adapted to the experimental data. The law is implemented as a UMAT in Abaqus. Simulations show minor thermal distortions due to thermal loading and substantial structural strength in mechanical loading of a mixed material structure.
    Original languageEnglish
    Title of host publicationProcedia Structural Integrity
    Number of pages10
    Volume2
    PublisherElsevier
    Publication date2016
    Pages235-244
    DOIs
    Publication statusPublished - 2016
    EventEuropean Conference on Fracture 2016 - Catania, Italy
    Duration: 20 Jun 201624 Jun 2016
    Conference number: 21
    https://www.ecf23.eu/ecf-history/

    Conference

    ConferenceEuropean Conference on Fracture 2016
    Number21
    Country/TerritoryItaly
    CityCatania
    Period20/06/201624/06/2016
    Internet address
    SeriesProcedia Structural Integrity
    ISSN2452-3216

    Keywords

    • Mixed Material Joint
    • Structural Strength
    • FEA
    • J-Integral Method

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