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Contact Stress and Wear Analysis of Zirconia Against Alumina for Normal and Physically Demanding Loads in hip Prosthesis

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Journal of Bionic Engineering 2020年第5期17卷 1045-1058页

作者： Subramaniam Shankar Rajavel Nithyaprakash Palanisamy Sugunesh Mohammad Uddin Alokesh Pramanik Department of Mechatronics Engineering Kongu Engineering CollegeErodeTamilNaduIndia Department of Mechanical Engineering Kongu Engineering CollegeErodeTamilNaduIndia University of South Australia UniSA STEMMawson Lakes CampusMawson LakesSA 5095Australia School of Civil and Mechanical Engineering Curtin UniversityBentleyWAAustralia

Risky gait activities lead to severe wear in orthopaedic implants during postoperative *** aim of the present study is to predict the linear and volumetric wear of zirconia(ZrO2)vs alumina(Al2O3)hip implants subject to risky and normal gait ***,the gait loads pertaining to risky gait activities were converted to equivalent normal *** using the computed normal loads,friction and wear coefficients of ZrO2 ball against Al2O3 disc were calculated from Pin-on-Disc(POD)tribometer under dry and lubricating *** solution,a bio-lubricant was utilized for lubrication purpose to mimic synovial fluid *** gait activities stair ascending or descending,carrying load,lifting load and ladder up or down etc.,grouped as A,B,C and D were used to determine friction and wear *** Element Method(FEM)was employed to predict the wear of the bearing *** developed contact pressure for these gait activities was then utilized to compute linear and volumetric wear for 2 million *** findings suggests that,patients regularly involved in group C and D type gait activities were likely to cause more wear which may accelerate early implant failure.

关键词： hip implants gait activities pin-on-disc lubrication FEM wear

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