Heterogeneous multilayer heat prevention-heat insulation composite material prefabricating body structure and molding process thereof

Abstract

The invention discloses a heterogeneous multilayer heat prevention-heat insulation composite material prefabricating body structure and a molding process thereof, wherein the structure comprises a heat prevention structure layer, a heat insulation transition layer and a bearing structure layer. According to the molding process, a guiding rod is pre-arranged, different combinations of different kinds of fibers are used, the sequences in fiber winding processes are controlled, the center distance of a guiding sleeve is changed, and the guiding sleeve is replaced with fibers, such that the multi-material multilayer prefabricating body with density gradient is prepared; fibers with excellent heat prevention performance are wound and spread along the guiding sleeve to prepare the heat prevention structure layer; fibers with excellent heat insulation performance are wound along the guiding sleeve to prepare the heat insulation transition layer; continuous fibers are wound and spread along the guiding sleeve to prepare the bearing structure layer; and density gradient structure is achieved by controlling the center distance of the guiding sleeve and the fiber spreading and winding combination mode. According to the present invention, the composite material prepared from the prefabricating body structure and the matrix through impregnating can achieve the heat prevention / heat insulation / bearing integrated function.

Description

technical field [0001] The invention relates to a heat-proof / heat-insulation / load-bearing composite material prefabricated body structure and forming process, in particular to a heterogeneous multi-layer heat-insulating composite material prefabricated body structure and forming process, which are used for composite material heat-proof / heat-insulating / Carrying integrated thermal protection field. Background technique [0002] With the characteristics of hypersonic cruise, fast response, and high strategic value, hypersonic aircraft has become an important strategic equipment for major countries to compete for development. During hypersonic flight and hypersonic reentry of hypersonic aircraft in adjacent space, the surface temperature of the aircraft is very high, and the fuselage cabin is subjected to ultra-high dynamic loads. The thermal protection system is located outside the fuselage of the hypersonic vehicle to protect the temperature of the fuselage and internal str...

AI Technical Summary

Problems solved by technology

However, whether it is a sandwich structure or a multi-level structure, due to the limitation of the preparation process and its own structure, the weight of the thermal protection system is too large and the stability of the thermal protection performance is poor, which in turn affects the reliability of the thermal protection system of the hypersonic vehicle.

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