A finite element methodology for wear–fatigue analysis for modular hip implants

Fretting of the stem-head joint in a prosthetic hip implant is investigated experimentally and computationally. An FE-based methodology for fretting wear-fatigue prediction in a prosthetic hip implant is developed. Tribological and profilometry tests are performed for two head/stem material combinat...

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Bibliographic Details
Published in:Tribology international 2013-09, Vol.65, p.113-127
Main Authors: Zhang, T., Harrison, N.M., McDonnell, P.F., McHugh, P.E., Leen, S.B.
Format: Article
Language:English
Subjects:
Cobalt
CoCr alloy
Forges
Fretting
Hip implant
Prosthetics
Surgical implants
Titanium base alloys
Tribology
Wear resistance
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Summary:Fretting of the stem-head joint in a prosthetic hip implant is investigated experimentally and computationally. An FE-based methodology for fretting wear-fatigue prediction in a prosthetic hip implant is developed. Tribological and profilometry tests are performed for two head/stem material combinations: Co–28Cr–6Mo/DMLS Ti–6Al–4V and Co–28Cr–6Mo/forged Ti–6Al–4V. The hardness and wear resistance of DMLS Ti–6Al–4V are shown to be superior to those of forged Ti–6Al–4V. The significance of wear in a hip joint for 10 years of service in a normal weight person for moderately intense exercise is predicted for both material combinations. Both material combination joints are shown to have excellent wear resistance which suggests that the wear debris emission will not be significant. ► Fretting analysis on stem/head contact of a hip implant. ► Tribological and profilometry tests on stem/head material combinations. ► 2D axisymmetric fretting wear–fatigue FE analysis for stem–head contact. ► Comparison of fretting performance between forged Ti64 and DMLS Ti64. ► Development of an FE method on fretting wear–fatigue analysis of hip implant.
ISSN:0301-679X
1879-2464
DOI:10.1016/j.triboint.2013.02.016