Publicação

A spatial dynamic model to investigate hip squeaking and contact point path in hip implants

Ver documento

Detalhes bibliográficos
Resumo:The present paper hypothesises firstly that stick-slip, negative-damping effects and alteration in contact force induces a three-dimensional vibration of the head within the cup; and secondly that this friction-induced vibration alters the head/cup contact point sliding track in both micro and macro domains. A spatial multibody dynamic approach was developed taking into account three-dimensional physiological forces and motion of the human body. Tangential and normal contact forces were incorporated into nonlinear motion equations as external forces. Governing dynamic equations were solved using numerical methods and FFT analysis used to extract hip squeaking frequencies. The approach was found to be robust and fast with respect to computation time and accuracy and the results validated by comparing with outcomes available in the literature. Moreover, hip squeaking frequencies obtained from the present procedure are consistent with in-vivo results.
Autores principais:Askari, Ehsan
Outros Autores:Flores, Paulo; Dabirrahmani, Danè; Appleyard, Richard
Assunto:Hip Implant Hip Squeaking Multibody Dynamic Model Contact Point Path
Ano:2014
País:Portugal
Tipo de documento:comunicação em conferência
Tipo de acesso:acesso restrito
Instituição associada:Universidade do Minho
Idioma:inglês
Origem:RepositóriUM - Universidade do Minho

Registos relacionados

Registos relacionados