A method of implanting an elongated fibrous body into a large thickness face sheet preform

By using a slender fiber bundle hardening and reinforcement method and a wrapping and guiding method, combined with follow-up auxiliary support technology, the problem of stable implantation of slender fibers in thick C/C composite preforms was solved, improving the stiffness and implantation stability of the fibers and enabling efficient molding of complex-shaped components.

CN115782256BActive Publication Date: 2026-07-07NANJING UNIV OF AERONAUTICS & ASTRONAUTICS
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Patent Information

Authority / Receiving Office
CN · China
Patent Type
Patents(China)
Current Assignee / Owner
NANJING UNIV OF AERONAUTICS & ASTRONAUTICS
Filing Date
2022-11-16
Publication Date
2026-07-07

AI Technical Summary

Technical Problem

Existing technologies make it difficult to achieve stable implantation of slender fibers in thick C/C composite preforms, resulting in severe fiber damage and insufficient stiffness, making it difficult to form components with complex shapes.

Method used

Employing slender fiber bundle hardening and reinforcement technology, encapsulation guidance method, and follow-up auxiliary support technology, slender fiber bodies are formed by co-curing in a heated mold. The slender fiber body encapsulation tube and auxiliary support rod are used to ensure the stable implantation of the slender fiber body into the thick surface layer prefabrication.

Benefits of technology

It improves the stiffness and implantation stability of slender fiber bodies, avoids fiber damage and bending instability, and achieves efficient molding of thick surface layer preforms.

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Abstract

The present application provides a method for implanting an elongated fiber body into a large-thickness surface layer preform. The elongated fiber body in the method generally refers to an elongated fiber bundle with a diameter less than 1 mm and a length greater than 100 mm. The main contents of the method include 1) hardening and strengthening technology of the elongated fiber bundle, 2) wrapping and guiding method in the elongated fiber body introduction process, 3) enhancement and puncture edge technology of the elongated fiber body implantation wrapping tube, and 4) follow-up auxiliary support technology for improving the critical buckling load of the elongated fiber body implantation wrapping tube. The present application can effectively avoid instability bending of the elongated fiber body during implantation and achieve the goal of Z-direction implantation of the large-thickness surface layer preform.
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