Length Scale Considerations in Fretting Fatigue

D Nowell; DA Hills; R Moobola

doi:10.1520/STP14726S

SYMPOSIA PAPER Published: 01 January 2000

STP14726S

Length Scale Considerations in Fretting Fatigue

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The presence of fretting can be shown to decrease the fatigue life of a component by accelerating crack initiation and subsequent propagation. Behavior in the “long crack” regime may be adequately explained using linear-elastic fracture mechanics. In contrast crack initiation is complex and much more difficult to understand. A size effect has been recorded in which the fretting fatigue life for contacts loaded to the same magnitude of stress varies with contact size. This phenomenon is used to explore the various length scales present in the crack initiation problem. It is shown that it is important to consider the relative magnitudes of these dimensions when attempting to analyse any particular initiation problem.

Author Information

Nowell, D

University of Oxford, OXFORD, U.K.

Hills, DA

University of Oxford, OXFORD, U.K.

Moobola, R

University of Oxford, OXFORD, U.K.

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Details

Developed by Committee: E08

Pages: 141–153

DOI: 10.1520/STP14726S

ISBN-EB: 978-0-8031-5420-9

ISBN-13: 978-0-8031-2851-4

Length Scale Considerations in Fretting Fatigue

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