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

Autor: DY Wang, DE McCabe
Rok vydání: 2009
Předmět:
DOI: 10.1520/stp33945s
Popis: 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.
Databáze: OpenAIRE
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