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Mechanics Modeling of Blade/Disk Contacts

[+] Author Affiliations
Matthew C. Gean, Thomas N. Farris

Purdue University, West Lafayette, IN

Paper No. WTC2005-63545, pp. 303-310; 8 pages
doi:10.1115/WTC2005-63545
From:
  • World Tribology Congress III
  • World Tribology Congress III, Volume 1
  • Washington, D.C., USA, September 12–16, 2005
  • Conference Sponsors: Tribology Division
  • ISBN: 0-7918-4201-0 | eISBN: 0-7918-3767-X
  • Copyright © 2005 by ASME

abstract

A predictive procedure capable of calculating dovetail surface contact loads in gas turbine engines is developed. The procedure determines contact normal and tangential loads, for a complete mission involving radial blade and thermal loads. Once Finite Element calculations to determine empirical constants for a specific blade/disk geometry are completed, the predictive procedure handles complicated load histories in near real-time for both single and double tang dovetails. The resulting load histories can be combined with Singular Integral Equations to calculate edge-of-contact stresses. The resulting contact stresses have been used to successfully predict fretting fatigue lives under controlled laboratory conditions.

Copyright © 2005 by ASME
Topics: Modeling , Disks , Blades

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