VEXLPE friction studied with a multidirectional hip joint simulator using contact temperature control
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A1 Alkuperäisartikkeli tieteellisessä aikakauslehdessä
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Tribology International, Volume 187
Abstract
Frictional torque of VEXLPE and UHMWPE acetabular liners against CoCr and ZTA femoral heads was measured with a multidirectional hip joint simulator for a wide range of diameters. Measured frictional torque varied from 1 Nm to 7 Nm. The contact temperature was estimated with a subsurface thermocouple within the liner, located near the contact surface. When the estimated contact temperature was 37 °C, the lubricant bulk temperature was 30.1 ± 1.1 °C. When the lubricant bulk temperature was 37 °C, the estimated contact temperature was 43.4 ± 1.1 °C. The custom to use 37 °C as the lubricant bulk temperature in wear testing may lead to overheating of the contact and unrealistically low wear rates, as indicated by recent studies.Description
Funding Information: The study was funded by Aalto University . Publisher Copyright: © 2023 The Authors
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Saikko, V 2023, 'VEXLPE friction studied with a multidirectional hip joint simulator using contact temperature control', Tribology International, vol. 187, 108707. https://doi.org/10.1016/j.triboint.2023.108707