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Multi-directional motion at the ball–socket interface of a hip replacement joint has been discovered as a fundamental feature that determines the magnitude of wear for ultra-high molecular weight polyethylene (UHMWPE). The present study considers the wear of UHMWPE moving along a circular path with a uniform angular change rate of the velocity vector defined by the curvature of the sliding circle...
In a separate paper in this volume, the authors have discovered that the total wear of ultra-high molecular weight (UHMWPE) polyethylene moving along a circular path is directly proportional to the number of motion cycles and independent of the sliding distance per cycle. This is in conflict with common tribological principles particularly the Archard Equation that states that wear is proportional...
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