SYMPOSIA PAPER Published: 01 January 1976
STP33945S

Investigation of R-Curve Using Comparative Tests with Center-Cracked-Tension and Crack-Line-Wedge-Loaded Specimens

Source

This paper provides a comparison of the crack-line-wedge-loaded (CLWL) and center-cracked-tension (CCT) test methods for determining R-curves on a number of high-strength aluminum sheet alloys. In general, R-curves were reasonably close, differing only by amounts which could be explained by differences in testing procedure and in crack driving force curve. Gross stress, Kc, and crack length at instability were predicted satisfactorily for CCT panels from CLWL R-curves. The test results for CCT specimens show that consistent Kc values are obtainable from specimens of various widths provided that the net-section stress at failure is below general yielding.

Author Information

Wang, DY
Douglas Aircraft Co., McDonnel Douglas Corporation, Long Beach, Calif.
McCabe, DE
Armco Steel Corporation, Middletown, Ohio
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Details
Developed by Committee: E08
Pages: 169–193
DOI: 10.1520/STP33945S
ISBN-EB: 978-0-8031-4669-3
ISBN-13: 978-0-8031-0509-6