Composite material stiffened wallboard shear test piece

Abstract

The invention discloses a composite material stiffened wallboard shear test piece. The periphery of the test piece is a loading area for test clamping, the center of the test piece is a square test assessment area, the test assessment area is a composite material reinforced wallboard and comprises a skin and a plurality of stringers integrally formed with the skin, each stringer comprises a bottomedge attached to the skin and a flange perpendicular to the bottom edge, four sides of the skin of the test assessment area respectively protrude and extend to form a matrix layer of the loading area, reinforcing layers are arranged on the upper surfaces of the matrix layers of the loading areas at two sides on the two sides parallel to the stringers, on the upper surfaces of the matrix layers ofthe loading areas on the two sides in the direction perpendicular to the stringers, the bottom edges 6 of the stringers 4 and the skin extend together to form the loading areas, another reinforcing frame is connected to the lower surface of the test piece, the reinforcing frame is provided with four reinforcing edges matched with the loading areas, and the four reinforcing edges are connected toform the reinforcing frame.

Description

technical field [0001] The application relates to composite material test technology, and further relates to a shear test piece of a composite material reinforced wall plate. Background technique [0002] Composite material reinforced panel structure is the most commonly used panel structure in aircraft. It is solidified in the form of skin + stringer. To accurately verify the bearing capacity and stability of the structure, it is necessary to make reinforced panel Shear test. At present, there are mature test methods for the shear test of composite reinforced wall panels. Like the shear test of reinforced wall panels with metal structures, it is generally achieved by clamping on four sides and stretching diagonally. However, the problem existing in the composite material reinforced wall plate shear test piece is that the long stringer is generally cut off naturally from the examination area to the loading connection area, but the disadvantage of the composite material struc...

AI Technical Summary

Problems solved by technology

However, the problem existing in the composite material reinforced wall plate shear test piece is that the long stringer is generally cut off naturally from the examination area to the loading connection area, but the disadvantage of the composite material structure is that the structural performance in the longitudinal direction (layer thickness direction) is weak, and it is prone to split. In the case of layers, during the test loading process, the bottom edge of the girder and the skin are prone to delamination at the end of the girder, and the damaged area will appear in the loading connection area instead of the assessment area, which cannot achieve the purpose of the test

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