Sleeve taper-hi-bolts’ performance

double lap joints’ static strength and fatigue test were carried out

and failed joints were analyzed. The results show that sleeve taper-hi-bolts’ tensile

double shear and fatigue performance are qualified

and tensile fracture surface shows characteristics of dimple. Proportional difference of the pin load distributions for clearance fit is 41% for composite laminates with aluminum plates

while 34.7% for 1.0% interference joints. For composite laminates with titanium plates

proportional difference of the pin load distributions for clearance fit is 43.3%

while 37.7% for 1.0% interference joints. The fatigue life of interference fit composite laminates with aluminum plates is 1.7 times that of clearance fit

while 3.4 times for composite laminates with titanium plates. The main crack of interference fit joints originates from the angle of the hole

and that of clearance fit joints originates from the hole wall. Fracture analysis shows that 7050 exhibits mixed-rupture characteristics of quasi-cleavage and dimples

while TA15 exhibits quasi-cleavage characteristics with equiaxed dimple and river pattern.