SYMPOSIA PAPER
Published:
01 January 1988
STP23275S
Fatigue Crack Growth at Root Radii in Sheets with Variable Thickness
SourceFatigue crack growth data have been obtained for cracks at root radii in sheets with variable thickness. These test data were obtained under constant-amplitude as well as spectrum loading. Analytical stress-intensity factors were developed using mathematical techniques. The Mode I stress-intensity factors were approximately 10% lower than that of a plate with uniform thickness. Crack growth predictions for the test specimens were made using the analytical stress-intensity factors and a crack growth equation for a skin with uniform thickness. A good correlation is shown between observed and predicted crack growth behavior.
Author Information
Ratwani, MM
Specimen Preparation and Mechanical Test, M and P Research and Technology, Northrop Corporation, Aircraft Division, Hawthorne, CA
Kan, H-P
Specimen Preparation and Mechanical Test, M and P Research and Technology, Northrop Corporation, Aircraft Division, Hawthorne, CA
Hsu, SM
Specimen Preparation and Mechanical Test, M and P Research and Technology, Northrop Corporation, Aircraft Division, Hawthorne, CA
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Details
Developed by Committee: E08
Pages: 765–780
DOI: 10.1520/STP23275S
ISBN-EB: 978-0-8031-5036-2
ISBN-13: 978-0-8031-0949-0