Mechanics

Progressive disc collapse at thermal cycling without mechanical loading

O. F. Chernyavsky

South Ural State University

Abstract: The cyclic movement of the heat front or wave along the disk radius is shown to lead to the residual unceasing increase or decrease of its radius at small temperature differences — from a few tens of degrees for steel disks. By the example of a disk bending it was shown that similar effects can also be caused by time-temperature dependences.

Keywords: shakedown; progressive disc collapse; creep; disks; strength of turbomachinery.

UDC: 539.3

Received: 30.11.2014

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