Determination of the frictional properties of titanium and nickel alloys using the digital image correlation method

Kartal, M.E., Mulvihill, D.M. , Nowell, D. and Hills, D.A. (2011) Determination of the frictional properties of titanium and nickel alloys using the digital image correlation method. Experimental Mechanics, 51(3), pp. 359-371. (doi:10.1007/s11340-010-9366-y)

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Abstract

The paper describes experiments to investigate the frictional properties of a Titanium alloy (Ti-6Al-4V) and a Nickel alloy (Udimet 720) under representative engineering conditions. Flat fretting pads with rounded corners were clamped against a flat specimen and a servo-hydraulic tensile testing machine was used to apply cyclic displacement to the specimen. Slip displacement between the specimen and pad was measured remotely using an LVDT and locally using digital image correlation. The latter approach allowed accurate determination of the tangential contact stiffness from frictional hysteresis loops. The results obtained show that the contacts are significantly less stiff than would be predicted by a smooth elastic contact analysis. A finite element model of the experimental contact geometry was constructed and it was shown that good agreement with the experimental measurements of contact stiffness can be obtained with a suitable choice of elastic modulus for a compliant surface layer.

Item Type:Articles
Status:Published
Refereed:Yes
Glasgow Author(s) Enlighten ID:Mulvihill, Dr Daniel
Authors: Kartal, M.E., Mulvihill, D.M., Nowell, D., and Hills, D.A.
Subjects:T Technology > T Technology (General)
T Technology > TA Engineering (General). Civil engineering (General)
T Technology > TJ Mechanical engineering and machinery
T Technology > TL Motor vehicles. Aeronautics. Astronautics
T Technology > TS Manufactures
College/School:College of Science and Engineering > School of Engineering > Systems Power and Energy
Journal Name:Experimental Mechanics
Publisher:Springer
ISSN:0014-4851
ISSN (Online):1741-2765
Published Online:13 May 2010

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