BACKGROUND Articular cartilage is a viscoelastic material, but its exact behaviour under the full range of physiological loading frequencies is unknown. The objective of this study was to measure the viscoelastic properties of bovine articular cartilage at loading frequencies of up to 92 Hz. METHODS Intact tibial plateau cartilage, attached to subchondral bone, was investigated by dynamic mec...

An equation was developed from studies of single-pass wear and fracture toughness of filled and unfilled dental restorative resins and dental amalgams relating the sliding frictional force F to the normal load N, fracture toughness, modulus of elasticity, yield strength and slider diameter. This equation was of the same form as that reported for viscoelastic materials (F = KW). Friction was cau...

Metallic foams and lattice materials are compared in terms of properties and underlying deformation mechanisms. Lattice materials can be made to possess mechanical properties which are similar to, or exceed, those of foams depending upon the nodal connectivity. Scaling laws are reviewed here for the Young’s modulus and yield strength of foams and lattice materials, and the damage tolerance of e...

Dynamic pressure oil film bearing is an important mechanical component of the ship. With the development of large-sized ships, their dynamic pressure oil films often run at high speed and under heavy load generating high oil film pressure. In addition, due to the increased use of thin walled bearing shell with materials of low elastic modulus, the elastic deformation of the bearing shell which ...