Geometric locking composite material thin pull rod connection

Abstract

The invention discloses geometric locking composite material thin pull rod connection, and relates to the field of composite material application. The geometric locking composite material thin pull rod connection comprises a composite material thin pull rod, a light alloy sleeve piece and a light alloy joint; the end of the composite material thin pull rod is an inverted cone; the light alloy sleeve piece is cylindrical, an inner cavity is an inverted cone, the outer surface includes an outer first section and an outer second section, the outer first section is an outer self-locking thread, and the outer second section is a hexagonal nut; the inner cavity of the light alloy sleeve piece is in geometrically-matched connection with the end of the composite material thin pull rod; and an inner cavity of one end of the light alloy joint is cylindrical and is provided with an inner self-locking thread which matches an outer self-locking thread of the light alloy sleeve piece. The inventioncan fully exert the strength of a thin pull rod material, geometric self-locking limit force transmitting is carried out, the joint strength is not lower than that of the thin pull rod, the joint rigidity is high, the deformation is very small, the long-term load has no creep slip, the vibration fatigue is resisted, the installation is simple, the quality is easy to control, safety and reliabilityare achieved, and the geometric locking composite material thin pull rod connection can be applied to aerospace and advanced industrial equipment structural engineering.

Description

technical field [0001] The invention relates to the application field of composite materials, in particular to a geometrically locked composite material fine tie rod connection. Background technique [0002] The composite material structure has the characteristics of light weight, high strength, and high rigidity. It is an ideal structural system for aerospace vehicles and advanced industrial equipment. Its design, preparation, and application levels are important indicators of the industrial capabilities of aircraft. [0003] The high-performance fibers of composite materials have excellent tensile mechanical properties, such as carbon fiber tensile strength greater than 3GPa, modulus greater than 200MPa, and the components that give full play to the mechanical properties of materials are thin tension rods. The structural connection of composite materials is often connected by gluing, which transmits shear through the glue interface, but the shear strength of the glue is on...

AI Technical Summary

Problems solved by technology

The structural connection of composite materials is often connected by gluing, and the shear transmission is through the glue interface, but the shear strength of the glue is only about 20MPa, the modulus is about 3GPa, and the glueing process is unstable, and the quality and reliability are poor.

For large-scale composite material structural connections, bolts, anchors, glue joints or hybrid methods are often used, as well as new distributed Z-pin connections. Through local pressure and shear force transmission of component materials, there is a problem of damage and weakening of the main components. Particularly unsuitable for thin tie rod connections

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