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Reinforced negative stiffness metamaterial structure

A negative-stiffness, metamaterial technology, applied in the field of reinforced negative-stiffness metamaterial structures, can solve the problems of not considering the full use of space and its own strength, limited application occasions, design and manufacturing difficulties, etc., to improve structural design efficiency, Reduce design time and take advantage of improved results

Pending Publication Date: 2022-02-11
SOUTHEAST UNIV
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Problems solved by technology

The special material distribution structure will be more complicated, and it is difficult to design and manufacture; the application of the rotating linear spring is limited, and the beam structure has the advantages of simple structure and bistable performance, but the current metamaterial based on the beam structure has not Consider the full use of space and its own strength

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  • Reinforced negative stiffness metamaterial structure
  • Reinforced negative stiffness metamaterial structure
  • Reinforced negative stiffness metamaterial structure

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Embodiment Construction

[0020] The technical solution of the present application will be described in detail below in conjunction with the accompanying drawings.

[0021] figure 1 It is a structural schematic diagram of the reinforced negative stiffness metamaterial structure described in this application, combined with figure 2 , image 3 and Figure 4 , the reinforced negative stiffness metamaterial structure includes an outer cylindrical surface and an inner periodic structure, the outer cylindrical surface is provided with periodically distributed first beam units, and the inner periodic structure is provided with periodically distributed The second beam unit, the first beam unit and the second beam unit both include two symmetrical inclined beam units.

[0022] Both the upper surface and the lower surface of the outer cylindrical surface are circular structures, and the first beam units are periodically distributed between the circular structures on the upper surface and the lower surface. ...

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Abstract

The invention discloses a reinforced negative stiffness metamaterial structure, relates to the technical field of mechanical metamaterials, and solves the technical problems that the structure of a negative stiffness metamaterial is not simple enough and cannot be repeatedly used. According to the technical scheme, the metamaterial structure is characterized in that the space is fully utilized through an outer cylindrical surface and an internal periodic structure, and the impact resistance and the self strength of the metamaterial structure are improved. Meanwhile, the negative stiffness and the bistable performance of the metamaterial structure are rapidly calculated or verified through a buckling force displacement expression, the design time of the shock resistance of the reinforced metamaterial structure is shortened, and the structural design efficiency is greatly improved.

Description

technical field [0001] The present application relates to the technical field of mechanical metamaterials, in particular to a reinforced negative stiffness metamaterial structure. Background technique [0002] In the industrial field, especially the aerospace field, the requirements for lightweight, vibration isolation, impact resistance and other protective materials are getting higher and higher. Metamaterials are materials with special artificial structures and special physical properties. In the field of mechanical metamaterials, negative Poisson’s ratio and negative stiffness metamaterials have good vibration isolation and impact resistance, so the research on metamaterials is of great importance. significance. [0003] In terms of structure and materials, there are several implementations of negative stiffness metamaterials: compression and bending beam structures, rotating linear springs, and special material distributions. The special material distribution structur...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G16C60/00G16C10/00
CPCG16C60/00G16C10/00Y02P10/25
Inventor 孙蓓蓓潘怡王萌
Owner SOUTHEAST UNIV
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