The effect of stationary loading on the friction and boundary lubrication of articular cartilage in the mixed lubrication regime

摘要: Friction of cartilage/metal contacts, within a mixed lubrication regime, was recorded using synovial fluid, Ringer's solution or no lubricant present. The main test variable the period stationary loading prior to sliding which ranged from 5 seconds 45 minutes. This amount time that cartilage spent loaded against metal counterface horizontally and measuring friction. calculated coefficient friction rose with increasing time, reaching an asymptote at 0.270. Following re-application load, after short periods load removal, also found drop sharply. flow liquid in carriage by fluid phase highlighted as being important factor influencing At 2 minute beneficially lubricated contact compared solution, mechanism longer effective times beyond. boundary possibly inherent part articular surface, rather than absorbed all three lubricating conditions demonstrated equivalent u readings for most tests.