Enhanced computational modelling of UHMWPE wear in total hip joint replacements: The role of frictional work and contact pressure

Liu, Feng; He, Ying; Jiao, Duoduo

doi:10.1016/j.wear.2021.203985

Cited by 12 publications

(12 citation statements)

References 27 publications

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“…Direct measurement of lubricant film thickness and validation of lubrication models were carried out for both the hip [662] and the knee [663]. Wear modelling was increasingly developed and refined for the hip [664,665] and for the knee [666]. The advantage of computational wear modelling allowed the potential of integrated studies; for example, combination of wear and lubrication modelling, and coupling of tribological and biomechanics etc.…”

Section: Natural Synovial Joints and Artificial Joint Replacementsmentioning

confidence: 99%

A review of advances in tribology in 2020–2021

Meng

et al. 2022

Friction

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Around 1,000 peer-reviewed papers were selected from 3,450 articles published during 2020–2021, and reviewed as the representative advances in tribology research worldwide. The survey highlights the development in lubrication, wear and surface engineering, biotribology, high temperature tribology, and computational tribology, providing a show window of the achievements of recent fundamental and application researches in the field of tribology.

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Section: Natural Synovial Joints and Artificial Joint Replacementsmentioning

confidence: 99%

A review of advances in tribology in 2020–2021

Meng

et al. 2022

Friction

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Section: Introductionmentioning

confidence: 99%

“…Numerical wear simulations are a powerful tool to predict the evolution of contact parameters during the service life of engineering components, from mechanical ones, like gears [1][2][3] or wheel-rail pair [4] to biomedical devices, like joint implants [5,6]. Different approaches can be adopted to develop wear models: rarely pure analytical methods [5,7,8], whilst more commonly Finite Element (FE) analyses [2,6,[9][10][11][12]. Each method has pros and cons: analytical models allow fast simulations typically for the running-in phase of the wear process [7,8], whilst FE models can be used for long-term wear predictions to the detriment of high computational costs [13,14].…”

Section: Introductionmentioning

confidence: 99%

“…Consequently, the critical aspect of the wear laws is the accurate estimation of the wear coefficient [7,15] which depends on many factors amongst which friction, lubrication regime, material properties of the mating surfaces, kinematic, and loading conditions. Additionally, k can even change in time and locally, such as in case of cross-shear [6,16].The wear law and wear model validation is a further critical issue [7,17].…”

Section: Introductionmentioning

confidence: 99%

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Frictionless vs. Frictional Contact in Numerical Wear Predictions of Conformal and Non-conformal Sliding Couplings

Mattei¹,

Puccio²

2022

Tribol Lett

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The role of friction on wear evolution is manifold since it interplays with lubrication regime, nominal contact point, and contact pressure distribution. Nevertheless, in the literature many wear models simulate wear assuming frictionless contact conditions to simplify the analyses. That assumption, physically not realistic, often appears as a contradiction, permitted in numerical simulations where friction and wear can be considered independent phenomena.This study aims to validate the frictionless assumption in wear models with steady nominal contact point, such as in many common configurations, e.g. pin on plate/pin on disc. Wear was simulated according to the Archard wear law for both non-conformal and conformal pin-on-plate contact pairs in reciprocating motion, assuming frictionless and frictional contact conditions, varying the coefficient of friction f in the range 0–0.4. Finite Element wear models were developed in Ansys® both with implicit and explicit kinematics. Results demonstrate that the effect of friction on contact pressure distribution and worn profiles and on their evolution is negligible (differences lower than 0.05%). Thus, wear can be predicted using models in frictionless conditions which allow to extremely reduce the computational costs that represent a limit of FE wear simulations. Additionally, a procedure with implicit kinematics was compared to the explicit one resulting valid and computationally convenient, especially in case of non-conformal contact.

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“…[1][2][3] Ultrahigh molecular weight polyethylene (UHMWPE) has been extensively used as the bearing surface material of tibial inserts due to its excellent performance, such as fatigue resistance and chemical stability. [4][5][6] Despite this, wear of UHMWPE is a major issue to cause the early retrieval of joint inserts. [7][8][9] A universal solution is to construct crosslinked networks in UHMWPE through radiation.…”

Section: Introductionmentioning

confidence: 99%

Improved oxidation stability and crosslink density of chemically crosslinked ultrahigh molecular weight polyethylene using the antioxidant synergy for artificial joints

et al. 2022

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Vitamin E (VE) is currently an approved antioxidant to improve the oxidation stability of highly crosslinked ultrahigh molecular weight polyethylene (UHMWPE) insert used commercially in total joint arthroplasty. However, the decrease in crosslink density caused by VE reduces wear resistance of UHMWPE, showing an uncoordinated challenge. In this work, we hypothesized that D-sorbitol (DS) as a secondary antioxidant can improve the antioxidant efficacy of VE on chemically crosslinked UHMWPE. The combined effect of VE and DS on oxidation stability of UHMWPE was investigated at a set of controlled hybrid antioxidant content. The hybrid antioxidant strategy showed significantly synergistic enhancement on the oxidation stability of chemically crosslinked UHMWPE compared with the single VE strategy. More strikingly, the crosslink density of the blends with hybrid antioxidants stayed at a high level since DS is not sensitive to crosslinking. The relationships between oxidation stability, mechanical properties, crosslink density, and crystallinity were investigated, by which the clinically relevant overall performance of UHMWPE was optimized. This work provides a leading-edge design mean for the development of joint bearings.

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Enhanced computational modelling of UHMWPE wear in total hip joint replacements: The role of frictional work and contact pressure

Cited by 12 publications

References 27 publications

A review of advances in tribology in 2020–2021

A review of advances in tribology in 2020–2021

Frictionless vs. Frictional Contact in Numerical Wear Predictions of Conformal and Non-conformal Sliding Couplings

Improved oxidation stability and crosslink density of chemically crosslinked ultrahigh molecular weight polyethylene using the antioxidant synergy for artificial joints

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