DTIC ADA046180: Development and Evaluation of Methods pdf

DTIC ADA046180: Development and Evaluation of Methods

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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

• Creator/s: Defense Technical Information Center
• Date: 8/1/1977
• Year: 1977
• Book Topics/Themes: DTIC Archive, Wilhem, D. P., NORTHROP CORP HAWTHORNE CA AIRCRAFT DIV, *STRESS ANALYSIS, *FRACTURE(MECHANICS), *AIRFRAMES, STRESS STRAIN RELATIONS, ALUMINUM ALLOYS, MATHEMATICAL PREDICTION, TITANIUM ALLOYS, NICKEL STEELS, RESIDUAL STRESS, CRACK PROPAGATION, STRENGTH(MECHANICS), METALS

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