Fatigue life predictions of porous composite paper coatings

Natalie Fern, Parvez Alam, Farid Touaiti, Martti Toivakka

    Tutkimustuotos: LehtiartikkeliArtikkeliTieteellinenvertaisarvioitu

    6 Sitaatiot (Scopus)

    Abstrakti

    Low-cycle strain-controlled fatigue tests were carried out to determine the influence of porosity, binder volume and binder type used within a calcium carbonate based composite. Fatigue lifetime, degree of plastic strain, maximum cyclic stress and hysteresis loops were analysed.

    Porosity influenced by binder volume was identified as the main factor to effect a change in fatigue lifetime. Increasing polymer content by ten times led to a similar lifetime at 30 times the amplitude. Lower Tg polymer binder improved lifetime for high percentage volume binder by 2–5 times, but its effects were not noticeable in lower amounts. There was little degradation in compressive strength as a function of number of cycles but tensile load bearing resistance depreciated noticeably throughout testing due to areas of low binder leading to widespread areas of crack propagation. Hysteresis loops show that for lower polymer concentrations little plastic damage occurs within the compressive portion of the fatigue cycles. This was due to the hard pigment particles dominating compressive behaviour.

    AlkuperäiskieliEi tiedossa
    Sivut181–187
    Sivumäärä7
    JulkaisuInternational Journal of Fatigue
    Vuosikerta38
    DOI - pysyväislinkit
    TilaJulkaistu - 2012
    OKM-julkaisutyyppiA1 Julkaistu artikkeli, soviteltu

    Keywords

    • Coatings
    • Composites
    • Fatigue
    • Particles
    • Porosity

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