Fiber metal laminate for enhancing composite interface connection and preparation method thereof

Abstract

The invention relates to a fiber metal laminate for enhancing composite interface connection and a preparation method thereof. The fiber metal laminate comprises a metal laminate and a fiber prepreg tape layer, the metal matrix surface microstructure is composed of micron-sized bidirectional corrugations similar to a human intestinal villus structure and a seta structure on a gecko foot and nano-sized corrosion holes connected with the corrugations. According to the structure, the defects of a traditional physical surface treatment mode of a metal matrix of the fiber metal laminate can be overcome, the connection performance of a composite interface between the metal laminate and the fiber prepreg tape is enhanced, and the problems of layering and degumming easily occurring in the preparation and forming process of the fiber metal laminate are solved. According to the invention, a human intestinal villus structure and a seta structure on a gecko foot are used for reference, large-area molecular contact can be realized when the metal laminate is in contact with any surface by utilizing the micron-sized bulges, and weak Van der Waals interaction is converted into huge adhesive force, so that the composite interface connection performance between the metal laminate and the fiber resin layer is improved, and the service life of the metal laminate and the fiber resin layer is prolonged. And the glue failure or layering defect is effectively improved.

Description

technical field [0001] The invention relates to the technical field of plate composite materials, in particular to a fiber metal laminate with reinforced composite interface connection and a preparation method thereof. Background technique [0002] Compared with single metal materials and traditional fiber composite materials, fiber metal laminates have light weight and good electrical conductivity, and also have higher specific strength and specific stiffness, excellent fatigue and impact resistance, and high damage tolerance Etc. Due to its excellent comprehensive properties, fiber metal laminates are popular advanced composite materials in the aerospace industry. Their application in the aerospace field reduces the weight of aircraft structures and improves fatigue life. Fiber metal laminates have become one of the important materials of choice for large aircraft fuselage and wing skin structures. In addition, as industries such as automobiles and rail transit have high...

AI Technical Summary

Problems solved by technology

The reason is that due to the large difference in mechanical properties between the metal laminate and the fiber resin layer, the interfacial shear stress between the metal laminate and the fiber resin layer will increase during the preparation and forming process, resulting in a gap between the layers. ungluing or delamination

Although the traditional physical surface treatment methods of fiber metal laminates, such as sandpaper grinding, wire brush grinding, and sandblasting, form irregular jagged microscopic grooves on the surface of the metal laminate, which increases the distance between the metal laminate and the fiber resin layer. The contact area between them improves the bonding strength, but it cannot effectively improve the glue-opening or delamination defects that occur during the preparation and forming of fiber metal laminates.

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