CN214500859U

CN214500859U - High-strength chiral pressure-torsion superstructure cell

Info

Publication number: CN214500859U
Application number: CN202120161369.6U
Authority: CN
Inventors: 张晓亮; 徐凡; 杨易凡
Original assignee: Fudan University
Current assignee: Fudan University
Priority date: 2021-01-21
Filing date: 2021-01-21
Publication date: 2021-10-26
Anticipated expiration: 2031-01-21

Abstract

The utility model belongs to the technical field of the mechanics metamaterial, specifically relate to a superstructure cell element is turned round to high strength chirality pressure. The chiral pressure-torsion superstructure cell of the utility model is a cube surrounded by six in-plane chiral structures with the same structure; the in-plane chiral structure consists of 8 beams and a ring which are coplanar; among the 8 beams, 4 long beams and 4 short beams are alternated, one end of each long beam is tangent to the circular ring and combined into a whole, and the other end of each long beam is positioned at four vertexes of a square and the middle point of four edges of the square; in the cell element, six in-plane chiral structures with the same structure are correspondingly connected with the outer end points of three beams of two adjacent in-plane chiral structures to form a space cube. The superstructure material formed by the superstructure cell stack can generate stable and remarkable torsion behavior when being pressed, and the maximum torsion angle can be regulated and controlled by the thickness of the beam, the number of cells and the number of layers.

Description

High-strength chiral pressure-torsion superstructure cell

Technical Field

The utility model belongs to the technical field of the mechanics metamaterial, concretely relates to superstructure cell element is turned round to high strength chirality pressure.

Background

The mechanical metamaterial is an emerging research field in recent years, is paid attention to due to the fact that the metamaterial has extraordinary physical mechanical properties which cannot be achieved by natural materials, and aims to break through the limit of the mechanical properties of the traditional structure continuously. The design concept of the mechanical metamaterial is to realize extraordinary mechanical properties through the optimized design of the configuration of the material cells. The performance of the device mainly depends on the structure of a micro cell designed manually.

The existing compression torsion metamaterial has the defects of complex structure, high manufacturing difficulty and the like, and is easy to break, decenter, destabilize and destroy when being compressed, so that the compression torsion structure has poor durability.

The utility model provides a superstructure cell element is turned round to high strength chirality pressure for the reliability and the stability of turning round the structure to the pressure are better, are expected to play the effect in fields such as mechanical transmission, architectural design, aerospace, because of its exclusive reinforcement structure, can play stable mechanics effect in more extreme operating mode.

Disclosure of Invention

An object of the utility model is to provide a superstructure cell element is turned round to high strength chirality pressure that reliability and stability are good.

The utility model provides a high-strength chiral pressure-torsion superstructure cell, which is a cube surrounded by six in-plane chiral structures with the same structure; the in-plane chiral structure consists of 8 beams and a ring which are coplanar; of the 8 beams, 4 beams are longer, the 4 beams are the same in length, the other 4 beams are shorter, the 4 beams are the same in length, 4 long beams are alternate to 4 short beams, one ends of the 4 long beams are tangent to the circular ring respectively and are combined into a whole, the other ends of the 8 beams are located at four vertexes of a space square and the middle points of the four sides of the square respectively, namely the outer end points of the 8 beams form a space square, and as shown in fig. 1, the space square is formed. In the cell element, six in-plane chiral structures with the same structure are correspondingly connected with the outer end points of three beams of two adjacent in-plane chiral structures to form a space cube, as shown in fig. 3.

The utility model relates to a superstructure cell element is turned round to high strength chirality pressure, and the ring in its face chiral structure plays stable in structure's effect, and 8 roof beams play the reinforcing effect of structure atress.

The high-strength chiral pressure-torsion superstructure cell designed by the utility model can be prepared by adopting a 3D printing technology or adopting a casting and cutting mode; the material has better elasticity and toughness.

When the 3D printing additive manufacturing is adopted, firstly, a model is built by modeling software according to a drawing, and the built model is sliced by slicing software and then is led into the 3D printing; the printing material is TPU95A, the supporting material is PVA, and after printing, the part is immersed in warm water for a plurality of hours to enable the water-soluble support to be dissolved in water and then dried.

The utility model discloses a superstructure cell element is turned round to high strength chirality pressure piles up, can form the superstructure material is turned round to high strength chirality pressure, and this chirality is pressed and is turned round superstructure material and can take place stably and the twisting action that is showing when the pressurized. The main characteristics are as follows:

1. the compression can generate large-amplitude and stable torsion behavior;

2. through a plurality of reinforcing rods in the in-plane chiral structure, the structure can realize the pressure-torsion function, and meanwhile, the structural rigidity is firmer and more reliable;

3. the maximum torsion angle can be regulated and controlled by the thickness of the beam, the number of the cells and the number of layers.

Drawings

FIG. 1 is a schematic representation of an in-plane chiral structure.

Fig. 2 is a three-dimensional view of an in-plane chiral structure.

Fig. 3 is a diagram illustrating a cell structure.

Figure 4 is a three-dimensional view of the cell.

Fig. 5 is a schematic view of a 1 × 1 × 8 stack.

Fig. 6 is a 1 × 1 × 8 stacked three-view.

FIG. 7 is an initial oblique view of the 11X 1X 8 stack of the embodiment.

FIG. 8 is an initial front view of an example 11X 1X 8 stack.

FIG. 9 is an initial top view of an 11X 1X 8 stack of the embodiment.

FIG. 10 is a twisted oblique view of the 11X 1X 8 stack of the embodiment.

FIG. 11 is a front view of an example 11X 1X 8 stacked torsion.

FIG. 12 is a top view of an example 11X 1X 8 stacked twist.

FIG. 13 is a schematic view of example 11X 1X 8 stacking twist angle.

Detailed Description

The invention is further described below by means of specific embodiments and figures.

Example 1:

printing by using a 3D printer, wherein the used material is TPU95A, and the used water-soluble supporting material is PVA.

The in-plane chiral structure of example 1 is shown in fig. 1, and its main structure is composed of 8 beams and a central ring, wherein one end of 8 beams is located at the vertex or the middle point of the side of the in-plane square, and the other end is tangent to the central ring. The width of the beam is 5mm, the thickness is 5mm, the inner radius of the central circular ring is 25mm, the outer radius is 30mm, and the thickness is 5 mm.

The cell of example 1 is a cube of 6 in-plane chiral structures that are perpendicular to each other, as shown in FIG. 3.

The 1 × 1 × 8 stack of example 1 is shown in fig. 7, and the stack is a 1-column, 1-row, 8-layer structure of 8 cells.

And after printing is finished, placing the printed part in water for soaking, replacing clear water until PVA support completely disappears after the clear water becomes turbid, and drying.

As shown in fig. 7, 8, 9, 10, 11 and 12, the 1 × 1 × 8 stacked compression-torsion superstructure undergoes significant torsion after compression, with a compression distance of about 134mm, a strain of 16.7%, measurable from fig. 8 and 11, a torsion angle of about 66 °, a camber of 1.15, a calculated angle to strain ratio of 3.95 °/%, and a camber ratio of 0.069/%, as measured from fig. 13.

Claims

1. A high-strength chiral piezoelectric superstructure cell is characterized in that a cube is formed by enclosing six in-plane chiral structures with the same structure; the in-plane chiral structure consists of 8 beams and a ring which are coplanar; among 8 beams, 4 beams are longer, the 4 beams are consistent in length, the other 4 beams are shorter, the 4 beams are consistent in length, 4 long beams and 4 short beams are alternated, one ends of the 4 long beams are tangent to the circular ring respectively and combined into a whole, and the other ends of the 8 beams are located at four vertexes of a space square and the middle points of four sides of the square respectively; in the cell element, six in-plane chiral structures with the same structure are correspondingly connected with the outer end points of three beams of two adjacent in-plane chiral structures to form a space cube.