Aircraft wing rib collapse large-opening stiffened wall plate shear test equipment and method

Abstract

The invention discloses an aircraft wing rib collapse large-opening stiffened wall plate shear test equipment and method. The equipment comprises a rib-collapsing large-opening stiffened wallboard test piece with a plurality of rib dummy pieces, and the end face of each rib dummy piece is designed to be a semicircular cambered surface; a flat plate supporting clamp is arranged at the cambered surface end of each fake rib part, so that the cambered surface of each fake rib part is in linear contact with the plane of the flat plate, an out-of-plane simple supporting condition is provided for a non-opening area of the wall plate, the supporting state can provide the out-of-plane simple supporting condition along with deformation of the test piece after the test piece is loaded, and the supporting condition is real; and clamping sections are designed on four sides of the test piece, the clamping sections are clamped by loading clamping plates, the loading clamping plates are in butt joint with a testing machine through lugs, and a shear loading state of the test piece is realized by applying a diagonal tensile load. Compared with a traditional method, the method has the advantages that a box section does not need to be designed to install the test piece, the form of the test piece is simplified, the test scale is greatly simplified, test implementation is easy, the test period is shortened, and expenditure is reduced.

Description

technical field [0001] The invention belongs to the wing stiffened wall board test technology in the aviation field, and relates to a shear test device and method for a large-opening stiffened wall board with collapsed ribs of an aircraft wing. Background technique [0002] In order to be able to assemble and overhaul the wing box section of the aircraft, a large opening needs to be set on the wall plate, and the load-bearing cover is connected to the opening to jointly bear the load of the wing wall plate. The size of the opening generally allows at least one person to enter. For small and medium-sized aircraft, the size of the opening will be larger than one rib distance. There is no very accurate calculation method for the shear bearing capacity of this kind of collapsed rib and large opening reinforced wall plate structure, and the shear bearing capacity is mainly obtained through the test method. At present, the shear test of the reinforced wall plate structure with co...

AI Technical Summary

Problems solved by technology

At present, the shear test of the reinforced wall plate structure with collapsed ribs and large openings is to design a box section with at least 4 rib spacings for the test, such as figure 1 As shown, the test scale is large, the cost is large, and the period is long. Therefore, it is of great significance to study a simplified shear test method for ribs with large openings and reinforced panels.

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