A deformable and non-contact controllable two-dimensional mechanical metamaterial
A metamaterial and mechanical technology, applied in the field of metamaterials, can solve problems such as complex plane deformation, single change of material shape, and unrealization
Active Publication Date: 2021-10-15
BEIJING UNIV OF CHEM TECH
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Problems solved by technology
[0007] However, when the overall material has a uniform Poisson's ratio, the shape change of the material is relatively simple, and it is impossible to achieve more complex plane deformation, which leads to certain limitations in practical applications.
In addition, most of the existing mechanical metamaterials are deformed by applying direct contact force externally, which limits the application of this kind of mechanical metamaterials in scenarios where contact control cannot be satisfied.
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[0047] The scheme of the present disclosure will be further described in detail below in conjunction with the accompanying drawings and embodiments. It can be understood that the specific implementation manners described here are only used to explain relevant content, rather than to limit the present disclosure. It should also be noted that, for ease of description, only parts related to the present disclosure are shown in the drawings.
[0048] It should be noted that, in the case of no conflict, the implementation modes and the features in the implementation modes in the present disclosure can be combined with each other. The present disclosure will be described in detail below with reference to the drawings and embodiments.
[0049] In the present disclosure, Poisson's ratio should be understood as having a meaning generally recognized by those skilled in the art. Specifically, taking the longitudinal direction as the y-axis and the transverse direction as the x-axis, whe...
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The present disclosure relates to the technical field of metamaterials, and in particular to a two-dimensional mechanical metamaterial whose deformation can be designed and controlled without contact, wherein each monomer cell includes a deformation unit and a motion unit: the deformation unit includes a concave n Angular, n connecting rods and n control blocks, one end of each connecting rod is fixedly connected with the concave n-angle, and the other end is fixedly connected with the center of one control block, and each control block is far away from the center The two ends of each are slidingly connected to one motion unit, and in the same single cell, each motion unit is connected to two control blocks; wherein, in the deformation unit, it is symmetrical around the concave n-angle n connecting rods are fixedly connected; the deformation unit is a star structure whose size is controlled by deformation parameters, and the motion unit is a plate-shaped structure with a fixed size; a control groove is provided on the plate-shaped structure for slidingly connecting the control block with motor unit. The disclosed material can realize negative Poisson's ratio effect and deformation can be designed and controlled without contact.
Description
technical field [0001] The present disclosure relates to the technical field of metamaterials, in particular to a two-dimensional mechanical metamaterial. Background technique [0002] In today's world, high-performance materials play a vital role in the sustainable development of transportation, energy power, resources and environment, agricultural construction, national defense and military, and major national projects. However, with the continuous development of modern engineering technology, the normal performance of ordinary high-performance materials can no longer meet specific needs. [0003] Metamaterials are composite materials that break through the limitations of some apparent natural laws through artificially designed structures (such as physical structures), and present supernormal material functions that natural materials do not possess. [0004] Mechanical metamaterial (Mechanical metamaterial) (also known as mechanical metamaterial) broadly refers to a class...
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IPC IPC(8): H01Q15/00
CPCH01Q15/0086
Inventor 姚剑飞苏永菲
Owner BEIJING UNIV OF CHEM TECH