Abstract:
:An adaptive finite element simulation was developed to predict fretting wear in a head-neck taper junction of hip joint implant through a two dimensional (2D) model and based on the Archard wear equation. This model represents the most critical section of the head-neck junction which was identified from a 3D model of the junction subjected to one cycle of level gait loading. The 2D model was then used to investigate the effect of angular mismatch between the head and neck components on the material loss and fretting wear process over 4 million gait cycles of walking. Generally, junctions with distal angular mismatches showed a better resistance to fretting wear. The largest area loss in the neck after 4 million cycles of loading was 1.86E-02mm2 which was found in the junction with a proximal mismatch angle of 0.124°. While, the minimum lost area (4.30E-03mm2) was found in the junction with a distal angular mismatch of 0.024°. Contact stress, amplitude of sliding and contact length were found as the key parameters that can influence the amount of material loss and the process of fretting wear damage. These parameters vary over the fretting wear cycles and are highly dependent on the type and magnitude of the taper angle mismatch. This study also showed that lost area does not have a linear relationship with the mismatch angle of taper junctions.
journal_name
J Mech Behav Biomed Materauthors
Fallahnezhad K,Oskouei RH,Badnava H,Taylor Mdoi
10.1016/j.jmbbm.2017.07.003subject
Has Abstractpub_date
2017-11-01 00:00:00pages
58-67eissn
1751-6161issn
1878-0180pii
S1751-6161(17)30291-6journal_volume
75pub_type
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