Structure and Technics Research on Composite Ship T-Joint

Abstract

T-joints between fiber reinforced composite material components are widely used in ship building. They are the weak positions in ship structure on mechanical properties aspect. Through experiments, the effects of structure size and technics on joint deformation and destructive strength were researched. Destructive strength first increases with the increase of T-joint fillet radius dimensions, then declines when radius dimensions over R50mm. Compared with control group, composite material components with surface sandblasting process has got superior performance, with destructive load improved by 2.1 times and displacement 1.16 times. With the increase of pressure and injection time of sandblasting process, the destructive strength of joints increases. While destructive strength increases slowly when pressure achieved 0.6 MPa and injection time achieved 100s.