Measurements of pressure and area dependent tangential contact stiffness between rough surfaces using digital image correlation

Mehmet E Kartal, Daniel M Mulvihill, David Nowell, David A Hills

Research output: Contribution to journalArticle

43 Citations (Scopus)


The present paper describes an experimental technique to accurately measure the tangential contact stiffness between two rough contacting surfaces manufactured from the titanium alloy Ti–6Al–4V. The digital image correlation method is employed to measure the local displacement field. The effect of normal contact pressure, nominal contact area and fretting wear on tangential contact stiffness is investigated. The experiments indicate that the tangential contact stiffness is approximately proportional to the nominal contact area and the normal pressure raised to the power of 0.64. Multiple experiments with the same parameters show good repeatability given the number of variables involved.
Original languageEnglish
Pages (from-to)1188-1198
Number of pages11
JournalTribology International
Issue number10
Early online date30 May 2011
Publication statusPublished - Sep 2011


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