Abstract
Fiber-Metal laminates that consist of carbon fiber composites and thin titanium films are applied to bolted joint to improve damage behavior of composite laminates. Tensile tests for bolted joints in the CFRP laminates and the hybrid laminates with five thin titanium films inserted to the CFRP plates are conducted. It is shown that load drop point in load-displacement curves represents damage onset in the laminates. In the CFRP laminate the micro-buckling of the carbon fiber in 0 degree direction layer (fiber kinking) occurs first and then matrix shear cracks in adjacent layers are induced by fiber kinking. On the other hand, matrix shear cracks that follow after the fiber kinking are found to be suppressed by the thin titanium films in the hybrid laminates. In particular, the laminate with the titanium films inserted to form sandwich with inner 0 degree direction layer showed low damage level compared to other hybrid specimen.
