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

DY Wang; DE McCabe

doi:10.1520/STP33945S

SYMPOSIA PAPER Published: 01 January 1976

STP33945S

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

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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, K_c, and crack length at instability were predicted satisfactorily for CCT panels from CLWL R-curves. The test results for CCT specimens show that consistent K_c 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

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

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