Abstract
Fretting is a phenomenon occurring between two surfaces having relative oscillatory motion of small amplitude. Fretting damage occurs on the surfaces of contacting components. An accurate assessment of critical fretting variables such as contact traction, contact condition (stick & slip) and contact stresses over the blade-disc attachment is essential to characterize the fretting performance and to assess the reliability of rotor. Such an understanding helps in the design of lighter engines, with better performance and improved safety. Rotor consists of a number of contact pairs of disc and blade, it would be complex to study all the interfaces together. Hence a simplified approach of studying a single lobe of a dovetail interface for a sector is considered to understand the fretting behavior of fan and compressor blade-disc interface. This paper examines to investigate the acute variations in stress along the Flank length, thickness, for varying friction and rotational speed of the disc/blade interface.
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