A Computational Analysis of Squeaking Hip Prostheses

Ehsan Askari*, Paulo Flores, Danè Dabirrahmani, Richard Appleyard

*Corresponding author for this work

    Research output: Contribution to journalArticle

    18 Citations (Scopus)

    Abstract

    A ceramic-on-ceramic (CoC) hip prosthesis with clearance is modeled as a multibody dynamics system for the purpose of studying hip squeaking. A continuous contact force model provides the intrajoint forces developed at the hip joint. Friction effects due to the relative motion are also considered. A FFT analysis of the audible sounds from CoC hip acceleration is carried out to analyze hip squeaking. The effects of friction, hip implant size, and the head initial position on hip squeaking and the trajectory of femoral head are analyzed and discussed. It was shown that the causes of hip squeaking are stick/slip, friction-induced vibration, and the femoral head angular speed and force changes.

    Original languageEnglish
    Article number024502
    Pages (from-to)1-7
    Number of pages7
    JournalJournal of Computational and Nonlinear Dynamics
    Volume10
    Issue number2
    DOIs
    Publication statusPublished - 1 Mar 2015

    Keywords

    • hip squeaking
    • multibody dynamics

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