Development and Evaluation of Methods of Plane Stress Fracture Analysis. Part 2. Volume 2. Fracture Resistance and Material Property Characterization
Final rept. Jan 1973-Dec 1974
NORTHROP CORP HAWTHORNE CA AIRCRAFT DIV
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In this volume those data required to characterize a materials fracture behavior and necessary to the residual strength prediction method proposed in Volume I are presented for the materials examined in this study. These data were developed from an extensive series of crack growth resistance tests, performed on the relatively new crack line wedge loaded CLWL specimen geometry. The following materials were examined in both the LT and TL fracture plane orientations in two thicknesses approximately 80, total specimens 7075-T6, 7075-T73, 2024-T3, Ti-6Al-4V, Ti-6Al-6V-2Sn. Crack growth resistance data were also obtained for a 9 nickel steel sheet in both crack orientations. Normal and extended range stress-strain data have been recorded for each material. In addition to yield and ultimate strength, material moduli have been obtained by strain gage as well as conventional extensometer for use in the double compilance method for determining crack length and applied load.
- Metallurgy and Metallography