Deformation is inevitable in Carbon Fiber Reinforced Polymer(CFRP) laminate forming and machining

which causes gaps exist among CFRP/Al stack structures. The gaps cannot be eliminated thoroughly in the assembling and the subsequent effects are still remain unclear. The stack structure tensile failure considering gap height and assembling sequence was studied. In order to achieve this goal

a finite element model coupling three dimensional Hashin criteria was built. Then the model was validated by comparing with the experimental results in literature. The materials failure around the hole was analyzed considering fibers direction with the finite element model. The load versus displacement curve showed that the failure became severer as the gap height increased. Also

for the three-bolt single lap joint

tensile bearing performance increased when tighting the middle bolt.