SYMPOSIA PAPER Published: 01 January 1995

Analysis of Fatigue Crack Closure and Thresholds


A critical examination of fatigue crack closure concepts indicates that (a) procedures commonly followed in estimating crack closure are in error, (b) complete premature crack closure occurs only when cracks are completely filled with oxides or corrosion products, (d) such closure manifests as an infinite slope in the load-displacement (crack mouth opening) curves; rarely observed in experiments, (e) asperities cause only local closure, (f) their contribution is less significant than is assumed and (g) plasticity does not contribute to closure. New concepts are developed to explain fatigue phenomena hitherto attributed to crack closure. Implications of these concepts to understand fatigue crack growth are discussed.

Author Information

Sadananda, K
Naval Research Laboratory, Code 6323, Naval Research Laboratory, Washington D.C.
Vasudevan, AK
Office of Naval Research, Arlington, V.A.
Price: $25.00
Contact Sales
Reprints and Permissions
Reprints and copyright permissions can be requested through the
Copyright Clearance Center
Developed by Committee: E08
Pages: 484–501
DOI: 10.1520/STP14611S
ISBN-EB: 978-0-8031-5294-6
ISBN-13: 978-0-8031-1882-9