A composite material reinforced wall plate shear test piece

Abstract

A composite material reinforced wall plate 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 wall plate, containing Mongolian The skin and multiple long stringers integrally formed with the skin, the long stringers include a bottom edge attached to the skin and a flange perpendicular to the bottom edge, and the four sides of the skin in the test assessment area protrude and extend respectively to form a load In the base layer of the area, a reinforcement layer is provided on the upper surface of the skin base layer of the loading area on both sides parallel to the stringer, and on the upper surface of the skin base layer of the loading area on both sides perpendicular to the stringer, the stringer 4 The bottom edge 6 of the test piece extends together with the skin to form a loading area, and another reinforcement frame is connected to the lower surface of the test piece. The reinforcement frame is provided with four reinforcement edges matching the loading area, and the four reinforcement edges are connected to form a reinforcement 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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