Variability in the magnitude of the impaction force applied by surgeons to assemble a hip prosthetic head to a femoral stem could be a cause of increased wear in taper junctions. This study investigates the effect of varying the magnitude of the assembly force on fretting wear at the taper over a 10 year period using a 3D finite element model and wear algorithm. It is demonstrated that an incre...

Modularity in total hip arthroplasty provides multiple benefits to the surgeon in restoring the appropriate alignment and position to a previously damaged hip joint. The vast majority of modern implants incorporate modularity into their design with some implants having multiple modular interfaces. There is the potential for failure at modular junctions because of fretting and crevice corrosion ...

Detailed surface characteristics of the particles produced during fretting may well be significant in determining their biological effects. Apart from a broad size determination very few attempts have been made at devising means of describing profile textures of particles. An approach is presented for describing the nature of particle shape and surface texture, as detected on the particle profi...

Consideration is given to methods for the evaluation of surface wear from fretted electrical contact surfaces. The surfaces under consideration are selected for in-vivo applications, they are testing using purpose built fretting apparatus to investigate intermittency. The intermittency is associated with high frequency transients in the contact resistance between the two interfaces. These event...

The crack nucleation orientation of fretting-affected components made AISI1034 steel and 35NCD16 is analysed in the present paper. In particular, both cylinder-to-flat sphere-to-flat contact configurations partial slip regime are simulated by means an analytical methodology based on elastic assumptions. Different locations surface considered order to estimate lifetime. Satisfactory results obta...

Looking at wear of incomplete contacts in partial slip we start from an asymptotic description the contact tractions edges. We introduce distributed dislocations along zone to account for profile reduction due and find long-term time asymptote where is wholly stuck. The resulting stress field used crack tip intensity factors short edge cracks, which are useful predicting nucleation threshold.

Nominally static contacts such as bolted or shrink-fit joints typically experience regions of microslip when subjected to oscillatory loading. This results in energy dissipation, reflected as apparent hysteretic damping of the system, and also may cause the initiation of fretting fatigue cracks. Early theoretical studies of the Hertzian contact problem by Cattaneo and Mindlin were confirmed exp...