A interesting article published online: 11 Jan 2016, in « Acta Orthopaedica « .
Wear and corrosion of taper connections in modular hip prostheses have gained much attention due to the serious biological response that can occur due to the metallic debris originating from this articulation.They present 3 cases of stem taper fracture as the ultimate failure mode of this design.
Ce ebook est une compilation des contributions qui seront présentées lors du « Malaysian International Tribology Conference 2015 » (MITC2015) à Penang, en Malaysie du 16 au 17 Novembre 2015.
Vous rencontrez un cas similaire, n’hésitez à pendre contact avec les experts en tribologie du Cetim. 11
An interesting paper in « Case study in Engineering Failure Analysis » published on ScienceDirect.com. This paper analyzed why a compression coil spring fractured at the transition position from the bearing coil to the first active coil in service, while the nominal stress here should always be much less than that at the inside coil position of a fully active coil. Visual observations indicated that a wear scar was formed on the first active coil and the fracture surface showed radiating ridges emanating from the wear scar. Scanning electron microscopy examination showed crescent shaped region and beach marks, typical of fatigue failure. ZnCaph phosphate layer and painting around the contact zone were worn out due to contact and friction and resulted in corrosion and corrosion pits induced local stress concentration. Stress analysis indicated severe stress singularities at the edges of the contact zone, which facilitated cycle slip and fatigue crack nucleation. Recommendations were also made for improving the fatigue performance of the suspension springs.
An interesting publication of the Asset Standards Authority (ASA), an independent unit established within Transport for NSW of Australia.
The occurrence of rail defects has generally increased because of the much longer rail lives obtained through various improvements, which have reduced the rail wear and hence have allowed the defects to develop. The main purpose of this Handbook is to describe some of the more common rail defects, their causes, and the possible ways of controlling their development.
The objective of this paper was to investigate wear and damage behavior of heavy-haul railway rail.
More at : Investigation on the damage mech………
More informations : Failure Analysis of Rocker Liner used as a charging system of Blast Furnace.
