Superimposed ultrasonic oscillations in compression tests of aluminium

Yusof Daud, Margaret Lucas, Zhihong Huang

    Research output: Contribution to journalArticlepeer-review

    65 Citations (Scopus)

    Abstract

    The application of ultrasonics in metal forming applications has been shown to reduce the forming load significantly in many research studies. The load reduction has been related to the stress superposition effect, rise in temperature and change in the friction condition between the specimen and die interfaces. This paper reports an investigation into the effects of superimposed ultrasonic oscillation of the die in compression tests on aluminium specimens. In particular, a finite element model is developed to simulate uniaxial compression and to model the effects of a change in the friction boundary condition when ultrasonic excitation is applied to the lower platen. The model predictions of the stress-strain relationship can be compared with test data to provide some insights into the effects of the interfacial condition. The paper shows how the analysis of the test data, combined with finite element models of ultrasonic compression test simulations, allows some initial conclusions to be drawn regarding the influence of the interfacial friction during ultrasonic compression.
    Original languageEnglish
    Pages (from-to)e511-e515
    Number of pages5
    JournalUltrasonics
    Volume44
    Issue numberSupplement
    DOIs
    Publication statusPublished - 22 Dec 2006
    EventUltrasonics International ’05 and World Congress on Ultrasonics 2005 - Beijing, China
    Duration: 29 Aug 20051 Sep 2005

    Keywords

    • High power ultrasonics
    • Uniaxial compression
    • Aluminium

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