Fatigue Strength and Related Characteristics of Aircraft Joints II : Fatigue Characteristics of Sheet and Riveted Joints of 0.040-inch 24S-T, 75S-T, and R303-T275 Aluminum Alloys

Abstract : The results of a series of fatigue tests of aluminum-alloy sheet materials and of simple riveted joints in these materials are presented. The materials tested were 24S-T Alclad, 24S-T bare, 75S-T Alclad, R303-T275 clad, and R303-T275 bare. All sheets were of the 0.040-inch gage. Unnotched sheet specimens, specimens notched by a drilled hole, and specimens with scratches were tested in direct-fatigue.