Abstract
Wear has been considered as a major issue for ball and socket artificial discs. This paper studies the effects of ball radius and radial clearance of the artificial disc on the von Mises stresses. Different material combinations, used in artificial discs, are compared. FEA simulation using Solidworks has been conducted for different disk geometries. The highest von Mises stress was 714MPa for 10mm radius metal against metal design. The lowest von Mises stress was 14.8MPa for 16mm radius of the UHMWPE/CoCr material combination, which exhibited the lowest von Mises stresses for all the radii of the ball and socket articulation. Considering radial clearance, the lowest von Mises stress was 14.8MPa for 0.015mm clearance of the UHMWPE/CoCr combination. The highest von Mises stress of 100.8MPa with a radial clearance of 0.25mm was recorded for the same combination. There is a strong relation between the von Mises stress and the geometry of the ball and socket of the artificial disc.
Highlights
Intervertebral discs are majorly responsible for back motions [1]
The design with the 16mm radius of the ball and socket showed a von Mises stress lower than the yield stress of the UHMWPE used in the simulation of the artificial disc
It has been found that there is a relationship between the von Mises stress and the ball radius of the artificial joints
Summary
Intervertebral discs are majorly responsible for back motions [1]. There are 24 discs in the spine which have the same shape but different sizes [2]. One of the major problems articulation joints face is the wear particles resulting from the friction between the ball and socket artificial joints [6,7,8]. These wear particles migrate to the surrounding tissues causing inflammation response and toxicity [9]. Choosing the right geometry of the ball and socket could improve the artificial joints lubrication regime and reduce the wear and friction generated from the articulation between them [18]. Maximum distortion energy was obtained by studying the strain energy that develops at a material point [21]
Sign-in/Register to view highlights & summary Sign-in/Register to access full text options 
Talk to us
Join us for a 30 min session where you can share your feedback and ask us any queries you have
Schedule a callMore From: Engineering, Technology & Applied Science Research
Disclaimer: All third-party content on this website/platform is and will remain the property of their respective owners and is provided on "as is" basis without any warranties, express or implied. Use of third-party content does not indicate any affiliation, sponsorship with or endorsement by them. Any references to third-party content is to identify the corresponding services and shall be considered fair use under The CopyrightLaw.
