Tribology and Lubricants

Korean Tribology Society (한국트라이볼로지학회)
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Effect of Contact Pressure on the Variations in Coefficients of Friction Between Porcine Knee Joint Cartilage and Co-Cr Alloy in a Repeat Pass Sliding Motion

반복 회전운동에서 코발트 크롬 합금과 미끄럼 접촉하는 돼지 무릎 관절연골의 접촉압력이 마찰계수 변화에 미치는 영향

  • Lee, Kwon-Yong (Dept. of Mechanical Engineering, Sejong University) ;
  • Kim, Hwan (Dept. of Mechanical Engineering, Sejong University) ;
  • Lee, Young-Ze (Dept. of Mechanical Engineering, Sungkyunkwan University)
  • 이권용 (세종대학교 기계공학과) ;
  • 김환 (세종대학교 기계공학과) ;
  • 이영제 (성균관대학교 기계공학과)
  • Published : 2009.08.31
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Abstract

In this study, the influence of contact pressure on the variation in coefficients of friction between porcine knee joint cartilage and Co-Cr alloy in a repeat pass sliding motion was investigated. Flat-ended cartilage pin specimens(9 mm diameter, 8 mm long) were prepared from porcine(6 months old) knee joints by a drill-type punch. Friction tests were conducted by using a pin-on-disk type friction tester for an hour in PBS lubricated condition under the contact pressures of 0.5, 1 and 2 MPa with 50 mm distance per a cycle at ambient condition. As a result, coefficients of friction increased as the test duration increased for all contact pressures. The maximum coefficients of friction were 0.082, 0.06 and 0.098 for 0.5, 1, and 2 MPa, respectively. It showed that coefficients of friction of porcine knee joint cartilage against Co-Cr alloy depended on the level of contact pressure and related to squeeze film lubrication mechanism.

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References

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