Characterisation of Fatigue Crack Growth in Silicone for Deap Technology

Thor Thorup

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    Abstract

    In this paper, the fatigue crack growth characteristics of Elastosil
    R RT 625 are determined by performing fatigue crack experiments based on ISO 27727. Elastosil R RT 625 is a silicone rubber used by Danfoss PolyPower A/S as the dielectric material in their DEAP elements.
    Cracks were characterised by a large amount of crack tip roughening, and a crack pattern that oscillated around the mean crack propagation direction. The amount of deviation from the expected crack path was proportional to the strain-level in the test. Despite the rough oscillating crack appearance, a linear
    relationship between the crack length and the amount of cycles was obtained. When plotting the crack growth per cycle against the applied load, the existence of a power law domain which can be described by Paris’ Law was observed. The silicone rubber had a significantly lower b exponent than a large range of other
    rubbers.
    Original languageEnglish
    Title of host publicationProceedings of International Mechanical Engineering Congress & Exposition
    Volume3
    PublisherAmerican Society of Mechanical Engineers
    Publication date2012
    Pages627-634
    ISBN (Print)9780791845196
    DOIs
    Publication statusPublished - 2012
    EventIMECE 2012 - Houston, TX, United States
    Duration: 9 Nov 201215 Nov 2012

    Conference

    ConferenceIMECE 2012
    Country/TerritoryUnited States
    CityHouston, TX
    Period09/11/201215/11/2012

    Bibliographical note

    Copyright © 2012 by ASME

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