Composite material integral beam

Abstract

The invention provides a composite material integral beam, which comprises a trough beam (1), a plurality of operation joints (2) and a plurality of suspension joints (3), wherein the trough beam, theoperation joints and the suspension joints are integrally molded, the trough beam (1) comprises a web plate, an upper flange and a lower flange, the upper flange and the lower flange are vertically connected to the web plate, one side, connected to the flange, of the web plate of the trough beam (1) is embedded with the plurality of the operation joints (2) and the plurality of the suspension joints (3), the operation joint (2) has a double-lug sheet structure, each lug sheet comprises a first flat plate and a right-angled triangular plate forming butt joint with the first flat plate, the first flat plate is connected to one right-angled edge in the right-angled triangular plate, the other right-angled edge in the right-angled triangular plate is positioned on one side of the upper flange, the suspension joint (3) has a double-lug sheet structure, each lug sheet comprises a second flat plate and a obtuse-angled triangular plate forming butt joint with the second flat plate, the secondflat plate is connected to the longest edge in the obtuse-angled triangular plate, and the shortest edge in the obtuse-angled triangular plate is positioned on one side of the lower flange. The composite material integral beam of the present invention has advantages of structural weight reducing, reduced number of fasteners, manufacturing cost reducing and fatigue life improving.

Description

technical field [0001] The invention belongs to the field of aircraft structure design, and in particular relates to a composite material integral beam. Background technique [0002] Nowadays, with the development and application of composite material technology, the skins, beams, ribs, etc. alloy and titanium alloy construction. [0003] When the suspension joints and manipulation joints are made of metal materials, certain anti-corrosion measures need to be taken between them and the composite material structural beams to avoid electrochemical corrosion at the metal-composite material interface. When the composite material structure is used for the suspension joint and the steering joint, although the electrochemical corrosion at the assembly interface between the joint and the composite material beam can be avoided, multiple tooling molds are required to form the composite material of the suspension joint and the steering joint, which increases the manufacturing cost. S...

AI Technical Summary

Problems solved by technology

When the composite material structure is used for the suspension joint and the steering joint, although electrochemical corrosion at the assembly interface between the joint and the composite beam can be avoided, multiple tooling molds are required for the composite material molding of the suspension joint and the steering joint, which increases the manufacturing cost

Secondly, when they are assembled with the beam, not only a large number of metal fasteners are required, but also the coordination of the assembly of the suspension joint and the steering joint requires strict design compensation and process compensation, and the fatigue life of the structure is reduced due to the mechanical connection

This will not only increase structural weight, manufacturing assembly difficulty and manufacturing cost, but also reduce structural fatigue life and structural efficiency

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