Fatigue Life and Fastener Flexibility of Single Shear Riveted and Bolted Joints

摘要

Fatigue life and fastener flexibility were investigated using open hole specimens, no load transfer specimens, and double row, four columns, single shear joints (S50) made from a 2 mm thick sheet of the aluminum alloy 7475-T761 fastened with rivets and Hi-lok. Computerized flight simulations show that fatigue lives of specimens with Hi-lok fasteners are much longer than for riveted specimens. The fastener flexibilities of riveted joints (S50) are much higher than for joints with Hi-lok fasteners. Fastener flexibility seems to depend on the stress level, the size of individual load cycles, the peak and the trough in a load cycle, and the number of applied flights.