Fractal gradient cap-shaped composite structure

Abstract

The invention provides a fractal gradient cap-shaped composite structure. The fractal gradient cap-shaped composite structure comprises a plane area, a transition area and a fractal area, wherein thecap top of the plane area is a flat and straight surface, the transition area is connected between the plane area and the fractal area to realize continuous transition of the cap top of the plane areaand the cap top of the fractal area in geometric configuration, the cap top of the fractal area is of a fractal structure which is of a wavy geometrical shape and gradually slows down from outside toinside, the plane area, the transition area and the fractal area are correspondingly made of a framework type composite sandwich structure plate, the framework type composite sandwich structure plateconsists of an inner flat plate, an outer flat plate and a middle framework interlayer, a cap-shaped surrounding space surrounded by the plane area, the transition area and the fractal area is filledwith a fan-shaped honeycomb structure, and the fan-shaped honeycomb structure is composed of fan-shaped honeycomb units. By means of the composite structure, the multiple anti-collision performance of a cap-shaped beam can be improved, and the safety guarantee of passengers is improved to the maximum degree.

Description

technical field [0001] The invention relates to the field of vehicle lightweight protection and energy absorption, and is a fractal gradient hat-shaped composite structure. Background technique [0002] In recent years, the transportation industry is increasingly approaching the trend of diversification and high-speed development, and the safety and security work of its personnel has become increasingly arduous, and the safety protection problems brought about by high-speed have become increasingly prominent. Secondly, in terms of safety protection, it is mainly divided into active protection and passive protection. When the sensitivity of active protection decreases or even fails, passive protection is particularly important. Therefore, in the current transportation products, more stable and efficient structural design is required to greatly improve the protection effect. [0003] At present, the hat-shaped structure is widely used in the front side beams and B-pillars of ...

AI Technical Summary

Problems solved by technology

[0003] At present, the hat-shaped structure is widely used in the front side beams and B-pillars of vehicles, so as to absorb more energy but have a smaller peak impact force during the collision process, and effectively guarantee the safety of the occupants. For the current The hat-shaped structure, or by changing the thickness, or by changing the material, or by various composite methods to improve the crashworthiness of the hat-shaped beam, all have a single structure, deformation in the collision is easy to lose stability, and the collision moment A series of problems such as large force and high requirements on materials cannot further enhance the crashworthiness of the hat-shaped structure.

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