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Fretting fatigue limit as a short crack problem at the edge of contact
Author(s) -
KONDO Y.,
SAKAE C.,
KUBOTA M.,
NAGASUE T.,
SATO S.
Publication year - 2004
Publication title -
fatigue and fracture of engineering materials and structures
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.887
H-Index - 84
eISSN - 1460-2695
pISSN - 8756-758X
DOI - 10.1111/j.1460-2695.2004.00750.x
Subject(s) - fretting , materials science , enhanced data rates for gsm evolution , crack closure , structural engineering , contact mechanics , finite element method , fatigue limit , slip (aerodynamics) , composite material , stress concentration , stress (linguistics) , paris' law , fracture mechanics , forensic engineering , engineering , telecommunications , linguistics , philosophy , aerospace engineering
ABSTRACT This paper proposes a local stress concept to evaluate the fretting fatigue limit for contact edge cracks. A unique S–N curve based on the local stress could be obtained for a contact edge crack irrespective of mechanical factors such as contact pressure, relative slip, contact length, specimen size and loading type. The analytical background for the local stress concept was studied using FEM analysis. It was shown that the local stress uniquely determined the Δ K change due to crack growth as well as the stress distribution near the contact edge. The condition that determined the fretting fatigue limit was predicted by combining the Δ K change due to crack growth and the Δ K th for a short crack. The formation of a non‐propagating crack at the fatigue limit was predicted by the model and it was experimentally confirmed by a long‐life fretting fatigue test.