Dynamic modeling and analysis of wear in artificial hip articulations

E. Askari, P. Flores, D. Dabirrahmani, R. Appleyard

Research output: Chapter in Book/Report/Conference proceedingConference proceeding contribution

1 Citation (Scopus)

Abstract

The main objective of the present study was to investigate the effect of friction-induced vibration on the predicted wear of artificial hip joints. The problem was formulated by developing a spatial multibody dynamic model of a hip prosthesis taking three-dimensional physiological loading and motion of the human body into account. The vibration of the femoral head inside the cup due to negative damping effect, stick-slip and alteration in contact force were incorporated in the system analysis. Previous investigation demonstrated that friction-induced vibration could increase the sliding distance of the contact point between the head and cup by altering its macro and micro trajectory. This work deals with the integration of the Archard wear model into the dynamic evaluation of the hip implant to predict wear. Additionally, to generate a more realistic wear simulation, geometries of the cup and head were updated throughout the simulation. It was hypothesized that friction-induced vibration can be the cause of the high wear rates observed clinically and finally illustrated that this undesirable oscillation caused excessive wear of hip implant component.

Original languageEnglish
Title of host publication2015 IFToMM World Congress Proceedings, IFToMM 2015
PublisherNational Taiwan University
Pages549-553
Number of pages5
ISBN (Electronic)9789860460988
DOIs
Publication statusPublished - 2015
Event14th International Federation for the Promotion of Mechanism and Machine Science World Congress, IFToMM 2015 - Taipei, Taiwan, Province of China
Duration: 25 Oct 201530 Oct 2015

Other

Other14th International Federation for the Promotion of Mechanism and Machine Science World Congress, IFToMM 2015
CountryTaiwan, Province of China
CityTaipei
Period25/10/1530/10/15

Keywords

  • hip articulation
  • wear
  • multibody dynamics

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