Abstract
The use of modular components in total hip arthroplasty introduced an additional interface with the potential for fretting and corrosion to occur. Fretting and corrosion at this interface have been reported as a potential cause of early failure of the implant system. Using finite element (FE) analyses the mechanics at the taper junction can be studied. However, most FE studies are based on a single load condition and do not take geometry changes over time into account. Therefore, in this study an FE routine was developed, in which adaptations to the implant geometry are made to account for material removal during the fretting process. Material removal was simulated based on Archard's Law, incorporating contact pressure, micromotions and a wear factor which used input from in vitro fretting tests. A wear factor of 2.7*10−5 mm3/N mm was used to match the FE predicted volumetric wear to the measured experimental volumetric wear of 0.79 mm3 after 10 million cycles. The maximum experimental wear depth found was 30.5 ± 17 µm, while the FE predicted a maximum wear depth of 27 µm. The adaptive meshing method has delivered results that are more similar to the experimental test data in comparison to the results from modelling a single cycle without adaptive meshing.
| Original language | English |
|---|---|
| Pages (from-to) | 616-623 |
| Number of pages | 8 |
| Journal | Journal of the mechanical behavior of biomedical materials |
| Volume | 77 |
| DOIs | |
| Publication status | Published - 1 Jan 2018 |
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Keywords
- Experimental
- FEA
- Finite element
- Fretting
- Taper
- THA
- Total hip arthroplasty
- Wear
- Abonnement
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Finite element wear prediction using adaptive meshing at the modular taper interface of hip implants. / Bitter, Thom (Corresponding Author); Khan, Imran; Marriott, Tim; Lovelady, Elaine; Verdonschot, Nico; Janssen, Dennis.
In: Journal of the mechanical behavior of biomedical materials, Vol. 77, 01.01.2018, p. 616-623.Research output: Contribution to journal › Article › Academic › peer-review
TY - JOUR
T1 - Finite element wear prediction using adaptive meshing at the modular taper interface of hip implants
AU - Bitter, Thom
AU - Khan, Imran
AU - Marriott, Tim
AU - Lovelady, Elaine
AU - Verdonschot, Nico
AU - Janssen, Dennis
PY - 2018/1/1
Y1 - 2018/1/1
N2 - The use of modular components in total hip arthroplasty introduced an additional interface with the potential for fretting and corrosion to occur. Fretting and corrosion at this interface have been reported as a potential cause of early failure of the implant system. Using finite element (FE) analyses the mechanics at the taper junction can be studied. However, most FE studies are based on a single load condition and do not take geometry changes over time into account. Therefore, in this study an FE routine was developed, in which adaptations to the implant geometry are made to account for material removal during the fretting process. Material removal was simulated based on Archard's Law, incorporating contact pressure, micromotions and a wear factor which used input from in vitro fretting tests. A wear factor of 2.7*10−5 mm3/N mm was used to match the FE predicted volumetric wear to the measured experimental volumetric wear of 0.79 mm3 after 10 million cycles. The maximum experimental wear depth found was 30.5 ± 17 µm, while the FE predicted a maximum wear depth of 27 µm. The adaptive meshing method has delivered results that are more similar to the experimental test data in comparison to the results from modelling a single cycle without adaptive meshing.
AB - The use of modular components in total hip arthroplasty introduced an additional interface with the potential for fretting and corrosion to occur. Fretting and corrosion at this interface have been reported as a potential cause of early failure of the implant system. Using finite element (FE) analyses the mechanics at the taper junction can be studied. However, most FE studies are based on a single load condition and do not take geometry changes over time into account. Therefore, in this study an FE routine was developed, in which adaptations to the implant geometry are made to account for material removal during the fretting process. Material removal was simulated based on Archard's Law, incorporating contact pressure, micromotions and a wear factor which used input from in vitro fretting tests. A wear factor of 2.7*10−5 mm3/N mm was used to match the FE predicted volumetric wear to the measured experimental volumetric wear of 0.79 mm3 after 10 million cycles. The maximum experimental wear depth found was 30.5 ± 17 µm, while the FE predicted a maximum wear depth of 27 µm. The adaptive meshing method has delivered results that are more similar to the experimental test data in comparison to the results from modelling a single cycle without adaptive meshing.
KW - Experimental
KW - FEA
KW - Finite element
KW - Fretting
KW - Taper
KW - THA
KW - Total hip arthroplasty
KW - Wear
KW - Abonnement
U2 - 10.1016/j.jmbbm.2017.10.032
DO - 10.1016/j.jmbbm.2017.10.032
M3 - Article
VL - 77
SP - 616
EP - 623
JO - Journal of the mechanical behavior of biomedical materials
JF - Journal of the mechanical behavior of biomedical materials
SN - 1751-6161
ER -