HSS 2104 Lecture Notes - Lecture 3: Monolayer, Elastic Energy, Fluid Bearing

• School: University of Ottawa
• Department: Health Sciences
• Course: HSS 2104
• Professor: Francois Beaulieu

Document Summary

Lecture 3 cartilage, ligaments, tendons, and muscles. Cartilage: covers articular surface of bone, present in some organs, hyaline, fibrocartilage, elastic, purpose. Decrease friction & wear during joint movement. Permeability of articular cartilage: ease w/ which fluid can flow through a porous permeable membrane, decreases exponentially as a function of the pressure gradient & axial compressive. Inversely proportional to frictional drag exerted by fluid strain applied. As pressure & strain increase, cartilage becomes less permeable, preventing fluid on articular surface from flowing back into cartilage: cartilage has low permeability, thus high frictional resistive forces. Response of material varies when subjected to action of constant load or deformation: creep. Increase in strain over time when constant load is applied. Viscoelastic responds w/ rapid initial deformation followed by slow, progressively increasing deformation until equilibrium is reached. Cartilage on cartilage lubricated by synovial fluid has coefficient of friction of 0. 002 (ice-water-ice 0. 03, steel-oil-steel 0. 05: boundary lubrication.