الخلاصة

In human knee joint synovial fluid film , covers the surface porosity of cartilage within the joint space .Knee joint acts as journal bearing in mechanical system .In this study determine the characteristic film action with different mechanical lubrication during daily active on the basis modeling thickness of cartilage in the human knee joint to obtain detailed analysis for pressure film that it changed through flow synovial fluid film ,load carrying capacity ,friction force , coefficient of friction and time approach that synovial fluid reduces in it . A theoretical analysis of film thickness in articular cartilage for long partial journal bearing lubrication by synovial fluid with couple stress ,assumed to be non-Newtonian is presented during joint activities and the influences .The model of knee joint has been taken geometrically as surface elastic porous journal bearing under different lubrication during stance phase and swing phase. Typical physical values of the knee joint has been taken from measure values in literature .The problem of layer thickness articular cartilage in knee joint has been solved numerically for various couple stress fluid and film thickness parameters with each other with effect of varying pore size surface on articular cartilage. Increasing values of the couple stress and film thickness parameters increases the pressure film ,load carrying capacity and outfits a longer time to ban cylinder Plan surface contact and reduction coefficient of friction .