Splined shafts used in gas turbines are being subjected to an ever more arduous set of loads, but the strength of this class of joints has hitherto not been probed. This paper describes preliminary contributions to determining this by first performing a finite element analysis of the spline overall in order to determine the contact conditions, including surface slip displacement. These conditions are then reproduced in a simplified fretting fatigue apparatus in order to reduce the number of prototypical tests required.
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