Modelling the effects of superimposed ultrasonic vibrations on tension and compression tests of aluminium

Yusof Daud, Margaret Lucas, Zhihong Huang

    Research output: Contribution to journalArticle

    129 Citations (Scopus)

    Abstract

    This paper presents a study of the effects of superimposing ultrasonic vibrations on the lower platen in tension and compression tests of aluminium. By measuring the oscillating force response as well as the static force, it is shown that the experimentally derived stress–strain data from these tests does not satisfy the description of a simple oscillatory stress superposition model. Finite element models of tension and compression tests are created and a description of the contact friction condition is included for the compression test model. By incorporating ultrasonic vibration of the lower platen for an interval during plastic deformation, the finite element model predicts that the stress–strain relationship satisfies a simple oscillatory stress superposition model. The finite element models are then developed further to investigate the predicted stress–strain relationship if a softer material model is incorporated only during the interval of ultrasonic excitation. For the tension test model, this allows the predicted stress–strain data to match the experimentally derived data.
    Original languageEnglish
    Pages (from-to)179-190
    Number of pages12
    JournalJournal of Materials Processing Technology
    Volume186
    Issue number1-3
    DOIs
    Publication statusPublished - May 2007

    Keywords

    • Ultrasonics
    • Tension tests
    • Compression tests
    • Aluminium
    • Finite element modelling
    • Friction

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