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Showing 1 to 8 of 8 for “"Fretting wear"”.
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A COMPUTATIONAL APPROACH TO FRETTING WEAR PREDICTION IN TOTAL HIP REPLACEMENTS
… of contact geometry for a given application. “Wear” is one of a number of mechanical failures that can occur in mechanical coupling design. “Fretting wear” occurs where surfaces in contact are subjected to oscillating load and very small relative motion over a period of time. Fretting has been …
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Analytical investigation of fretting wear with special emphasis on stress based models
<p>Fretting refers to the minute oscillatory motion between two surfaces in contact under an applied normal load. It can cause either surface or subsurface initiated failure resulting in either fatigue or wear or both. Two distinct regimes – partial slip and gross slip are typically observed in …
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Delamination-fretting wear failure evaluation at HAp-Ti-6Al-4V interface of artificial hip implant
… crack) to initiate delamination which promotes fretting wear behaviour. Fretting wear particles are concerned for activating inflammations at surrounding organs, which lead to loosening of implants or subsequent failures. Present research aims to develop a finite element model to examine …
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On the fretting wear of nuclear power plant heat exchanger tubes using a fracture mechanics approach : theory and verification
… observed in trying to identify the tube wear in heat exchangers. It is seen that the associated error could be an order of magnitude higher than the expected value, indicating the possibilities of failure at less than the predicted design life. Hence, the use of the commonly accepted …
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Damping acoustic pressure pulsations in pipelines using Helmholtz resonators
… potentially causing vibrations, increased fretting wear, and even fatigue failure. In this thesis, an acoustic damping device known as the Helmholtz resonator (HR) is experimentally studied. The effects of HR cavity volume, pipeline diameter, HR location, the use of multiple HRs, and mean …
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Achievable power uprates in pressurized water reactors using uranium nitride fuel
… minimum departure from nucleate boiling ratio, fretting and sliding wear and fuel average and centerline temperatures. These limits were set by the reference design's performance. Two strategies were used to raise the core power while remaining within specified limits: increasing the core mass …
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An investigation into the mechanisms of fretting fatigue
… of the mechanismsinvolved in the process of fretting fatigue.The design and construction of a rig to enable acontrolled fretting action to be applied to a push-pulltype of fatigue specimen is discussed. Specialconsideration is given to the form of the fretting contactgeometry with regard to …
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An investigation of thin amorphous carbon-based sputtered coatings for MEMS and micro-engineering applications
… C films, with and without Cr doping, as a low wear / friction coating applicable to MEMS and other micro- and nano-engineering applications. Firstly, an assessment was made of the available testing techniques. Secondly, the optimised test methods were applied to a series of sputtered films of …