CFRP Resin Bolt Structure for Higher Tensile and Bending Strength

The patent transitions from conventional linear/bent fiber arrangement to a three-dimensional spiral arrangement by winding reinforcing fiber resin tapes concentrically around a winding axis. This dimensional change allows fibers to be oriented at an angle to the axial direction, enabling simultaneous resistance to both tensile and bending forces, thereby resolving the strength insufficiency while maintaining structural integrity.

The patent introduces spiral curvature in fiber arrangement by winding tapes around a central axis at specific angles. This curved configuration optimizes force distribution throughout the bolt structure, allowing the fibers to effectively resist both axial tensile loads and circumferential bending loads, thus improving overall bolt strength compared to linear arrangements.

The patent adds angular dimension to fiber orientation by winding tapes at a specific angle relative to the axial direction. This creates a spiral configuration that simultaneously provides tensile strength (along the fiber direction) and bending resistance (through the spiral geometry), achieving enhanced force resistance without significantly complicating the manufacturing process.

The patent uses composite reinforcing fiber resin tapes that combine high-strength fibers with resin matrix. This composite structure maintains ease of manufacturing through tape form while providing superior mechanical properties including both tensile and bending resistance, overcoming the limitations of simple axial fiber arrangements.