Wear and corrosion at the modular head-neck junction has been recognised to be a potential clinical concern, with multiple reports on adverse local tissue reactions and subsequent early failure of metal-on-metal hip replacements. Furthermore, reports on head-neck taper corrosion are also being described with conventional metal-on-polyethylene bearings. Manufacturing tolerances, surgical techniq...

A method for simulating fretting wear using the Modified Simplex Method a contact solution has been developed. The initial separation between two contacting bodies was used as an input to solve force distribution. An average cycle pressure distribution calculated stationary surface over displacement cycle. depth each body based on modified Archard’s equation distributions and gross sliding dist...

Present research aims to develop a finite element computational model examine delamination-fretting wear behaviour that can suitably mimic actual loading conditions at HAp-Ti-6Al–4V interface of uncemented hip implant femoral stem component. A simple contact configuration based on fretting fatigue experimental arrangement subjected different mechanical and tribological properties consist pad (b...

• An applied technique is used to estimate fretting fatigue life of dovetail joints. Normalized stress select dataset for materials constants. FE make link between coupon and full-scale experiments. Fretting a complex phenomenon responsible decrease in lifetime many industrial components, such as joint blade disk typical turbine or compressor configuration. In order mitigate this issue numerous...

The origins of the perception of consonance and dissonance in music are a matter of debate. The present study examined the hypothesis of an innate preferential bias favoring consonance over dissonance by exposing 4 month old infants to consonant and dissonant versions of two melodies. Infants looked significantly longer at the source of sound and were less motorically active to consonant compar...

We consider fretting wear due to tangential oscillations of two contacting bodies. For small oscillation amplitudes, the wear occurs only in a circular slip zone at the border of the contact area. With increasing number of cycles, the wear profile tends to a limiting form, in which no further wear occurs. Under assumption of a constant coefficient of friction, the limiting form of the wear prof...

Abstract Carbon nanotubes (CNT) are of great interest to the research community due their outstanding mechanical, transport, and optical properties. These nanoparticles have also shown exceptional lubricating capabilities, which coupled with electrical conductivity show promising results as solid lubricants in contacts. In this study, three different CNT coatings were deposited over copper plat...

The aim of this article is to review those aspects of corrosion behaviour that are most relevant to the clinical application of implant alloys. The special modes of corrosion encountered by implant alloys are presented. The resistance of the different materials against the most typical corrosion modes (pitting corrosion, crevice corrosion and fretting corrosion) is compared, together with obser...

Do the discoveries of cognitive science generalize beyond artificial lab experiments? Or do they have little hope of helping us to understand real-world events? Fretting on this question, I bought a copy of the Wall Street Journal and found that the three front page headlines each connect to my own research on explanatory reasoning. I report tests of the phenomena of inferred evidence, belief d...

Modular neck hip prosthesis born in the 1990 with the aim of allowing the surgeon to modify CCD angle, offset and femoral anteversion intra-operatively restoring patient's original biomechanics. In order to achieve the best biomechanics of the reconstructed hip, preoperative planning is essential. In the last few years modularity has been questioned and an argument made for the return to mono b...