FRACTURE AND FATIGUE CRACK GROWTH BEHAVIOR OF SURFACE FLAWS AND FLAWS ORIGINATING AT FASTENER HOLES, VOLUME II - TABULATED DATA

摘要

The report contains tabulations of raw fatigue crack growth rate data generated during tests of surface flaws and flaws originating at fastener holes. The surface flaw tests involved a number of variables including alloy, flaw shape, initial flaw depth, loading profile, and stress ratio. Three alloys were tested including 2219-T851 aluminum, 9Ni-4Co-0.2C steel (190-210 ksi), and 6Al-4V standard ELI beta annealed titanium, all in plate form. Most specimens contained two or three flaws having initial depth-to-length ratios of 0.15, 0.30, or 0.45, and initial depth-to-thickness ratios ranging from 20 to 80 percent of the specimen thickness. Three different loading profiles were investigated including constant cyclic load, periodic overload, and spectrum loadings.