Box section butting assembly and method for different load levels and application

Abstract

The invention belongs to the field of airplane body test design and particularly relates to a box section butting assembly and method for different load levels and application. The box section buttingmethod comprises the steps of adopting butting pieces for connecting a body box section with a dummy box section; making partition sections of wall plates and spars of a body and dummy be in butt joint with each other, wherein a double shearing mode is adopted for the butt joint of the spars, and angle pieces are adopted for connection of the butted inner sides of the wall plates. The box sectionbutting method is simple in assembly and convenient in operation. In addition, by adopting a double shearing structure during butt joint, a box section test is more stable and safer, and the failurerisk of composite materials is reduced.

Description

technical field [0001] The invention belongs to the field of aircraft body test design, and in particular relates to a box segment docking assembly for different load levels, a docking method and an application. Background technique [0002] At present, the application of composite materials on civil aircraft needs to be verified by comprehensive building block tests, including typical box-level tests and large-scale section-level tests. Such test pieces are often designed with a dummy box section outside the assessment box section, external loads, etc. The effect is applied on the fake box section to ensure the authenticity of the load on the test box section. The structure of the fake box section is generally divided into two types: one is to directly extend the composite material part of the examination section as a fake box section; the other is to manufacture a metal box section, which is connected with the examination section by mechanical connection. The former reduc...

AI Technical Summary

Problems solved by technology

[0004] 1) The wall plate and spar in the butt joint area of ​​the box section are butt joint at the same rib section, the stiffness changes too much, and the stress concentration at the section is serious;

[0005] 2) The spar butt joint adopts the single shear form, which is weak under the action of large shear load;

[0006] 3) The wall plate adopts an integral butt joint with a card slot, which is difficult to assemble and locate, and it is difficult to coordinate deformation under large loads

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