Further fatigue tests on loaded holes with interference fit bushes

Fatigue tests in pulsating tension have been made on aluminium alloy lugs fitted with normal fit bushes end with 0.003" interference fit bushes. Tests were made at two levels of mean load each associated with two levels of alternating load. By using a tapered load-in on the bush, and by giving it a light cadmium plating, damage to the bore of...

The effect of tight clamping on the fatigue strength of joints

The effect of clamping on the fatigue strength of joints in aluminium alloy is investigated experimentally. Tests on Z section stringers connected to long, slotted cleats give an endurance for tightly clamped joints about nine times that for unclamped joints. Tests of bolted joints in aluminium alloy sheet material show still greater improvement...