A marine composite pipe and a method of making the same

Abstract

This application discloses a marine composite pipe and its preparation method. The marine composite pipe comprises, from the inside out: a sealed inner lining layer, an interlocking pressure-bearing layer, a gradient buffer insulation layer, and an outer protective layer. The interlocking pressure-bearing layer includes at least two layers of fiber-reinforced tape, which are wound to form at least one anti-crushing layer and one tensile layer. A biomimetic micro-anchoring intercalation layer is laid between the anti-crushing layer and the tensile layer. The anti-crushing layer, the tensile layer, and the biomimetic micro-anchoring intercalation layer are solidified to form a three-dimensional mechanical interlocking structure. When the marine composite pipe is subjected to transient impact or irregular dynamic load, controllable micro-slippage and hysteretic elastic deformation will occur between the interlocking points. This process can effectively absorb and dissipate impact energy, disperse the concentrated impact stress into a larger material volume, thereby inhibiting the initiation and rapid propagation of cracks, significantly improving the interlayer bonding strength, avoiding interlayer shear failure, and enhancing the overall mechanical bearing capacity and impact resistance of the pipe body.

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