Some observations on loss of static strength due to fatigue cracks /

Static tensile tests were performed on simple notched specimens containing fatigue cracks. Four types of aluminum alloys were investigated: 2024-T3 (formerly 24S-T3) and 7075-T6 (formerly 75S-T6) in sheet form, and 2024-T4 (formerly 24S-T4) and 7075-T6 (formerly 75S-T6) in extruded form. The cracked specimens were tested statically under four conditions: unmodified and with reduced eccentricity of loading by three methods. Results of static tests on C-46 wings containing fatigue cracks are also reported.NACA Research Memorandum L55D15A."May 20, 1955."Title from cover.Static tensile tests were performed on simple notched specimens containing fatigue cracks. Four types of aluminum alloys were investigated: 2024-T3 (formerly 24S-T3) and 7075-T6 (formerly 75S-T6) in sheet form, and 2024-T4 (formerly 24S-T4) and 7075-T6 (formerly 75S-T6) in extruded form. The cracked specimens were tested statically under four conditions: unmodified and with reduced eccentricity of loading by three methods. Results of static tests on C-46 wings containing fatigue cracks are also reported.Mode of access: Internet