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Internal torsion honeycomb structure material and preparation method thereof

A technology of honeycomb structure and internal torsion, which is applied in the direction of additive processing, weight reduction, springs, etc., can solve problems such as shear damage, and achieve the effect of high stiffness and energy absorption characteristics

Active Publication Date: 2022-05-27
CHENGDU UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] Aiming at the problem that the traditional hexagonal honeycomb is prone to shear failure under the in-plane direction compression loading condition, the present invention provides an internal torsion honeycomb structure material and a preparation method thereof, by making the inner cell wall of the hexagonal honeycomb Torsion, and by adjusting the process parameters such as torsion angle, cell thickness, side length and height, the energy absorption characteristics and specific stiffness performance of the honeycomb structure can be adjusted. The edge-shaped honeycomb structure material has higher specific energy absorption and specific stiffness

Method used

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  • Internal torsion honeycomb structure material and preparation method thereof
  • Internal torsion honeycomb structure material and preparation method thereof
  • Internal torsion honeycomb structure material and preparation method thereof

Examples

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Effect test

Embodiment 1

[0026] Example 1: An internal torsional honeycomb structure material (see Figures 1 to 3 ), composed of several internal torsional hexagonal honeycomb cell cell cells arranged in a topological array, the cross-section of the outer cell wall of each inner torsional hexagonal honeycomb structure cell cell unit is a regular hexagon, and the inner cell wall of each inner torsional hexagonal honeycomb structure cell cell unit is composed of torsional surfaces that are successively connected; adjacent internal torsional hexagonal honeycomb structure cell units share the outer cell wall;

[0027] The adjacent outer cell wall of the inner torsional hexagonal honeycomb structure cell unit is vertically connected, the upper torsional surface within the inner torsional hexagonal honeycomb structure cell unit is misaligned and connected with the lower torsional surface, and the vertices of the adjacent torsional surface are connected;

[0028] The edge length of the cell cell unit of the inte...

Embodiment 2

[0031] Example 2: The preparation method of the internal torsional honeycomb structure material described in Example 1, the specific steps are as follows:

[0032] (1) Design the inner torsional hexagonal honeycomb structure cell cell unit: the cross-section of the outer cell wall of the inner torsional hexagonal honeycomb structure cell unit is regular hexagonal, and the adjacent outer cell wall is vertically connected; the inner layer cell wall is a torsional surface that is successively connected, the upper torsional surface is misaligned with the lower torsional surface, and the vertices of the adjacent torsional surface are connected, and the torsion angle θ is 30 ° ~ 75 °; the cell wall thickness of the inner torsional hexagonal honeycomb structure cell unit is adjusted to adjust the relative density of the internal torsional honeycomb structure material to the preset value , where the preset value is between 0.1 and 0.5;

[0033] (2) The internal torsional hexagonal honeyco...

Embodiment 3

[0035] Example 3: Preparation method of internal torsional honeycomb structure material, the specific steps are as follows:

[0036] (1) Design of inner torsional hexagonal honeycomb structure cell cells: the cross-section of the outer cell wall of the inner torsional hexagonal honeycomb structure cell cell is a regular hexagon, and the adjacent outer cell wall is vertically connected; the inner layer cell wall is a torsional surface that is successively connected, the upper torsional surface is misaligned with the lower torsional surface, the vertices of the adjacent torsional surface are connected, and the torsional angle θ is 45° (the edge length of the inner torsional hexagonal honeycomb structure cell cell is equal to Lc and the height is Hc) By adjusting the cell wall thickness of the cell unit of the internal torsion hexagonal honeycomb structure t to adjust the relative density of the internal torsional honeycomb structure material to 0.237;

[0037](2) The internal torsio...

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Abstract

The invention relates to an internal torsion honeycomb structure material and a preparation method thereof, and belongs to the technical field of honeycomb materials. The internal torsion honeycomb structure material is composed of a plurality of internal torsion hexagonal honeycomb structure cell units which are arranged in a topological array mode, and the cross section of the outer layer cell wall of each internal torsion hexagonal honeycomb structure cell unit is in a regular hexagon shape. The inner-layer cell wall of each internally-twisted hexagonal honeycomb structure cell unit consists of twisted curved surfaces which are connected in sequence, and the adjacent internally-twisted hexagonal honeycomb structure cell units share the outer-layer cell wall. According to the invention, the inner-layer cell wall of the hexagonal honeycomb is twisted, and the energy absorption characteristic and the specific stiffness performance of the honeycomb structure are regulated and controlled by adjusting the process parameters such as the twisting angle, the cell thickness, the side length, the height and the like; compared with a traditional hexagonal honeycomb structure material, the internal torsion honeycomb structure material has higher specific energy absorption and specific stiffness.

Description

Technical field [0001] The present invention relates to an internal torsional honeycomb structure material and a method of preparation thereof, belonging to the field of honeycomb material technology. Background [0002] Honeycomb structure has excellent mechanical properties of the structure, because it has the characteristics of high specific stiffness, high specific strength, high energy absorption, in aerospace, automotive engineering, national defense and military fields are widely used. Since the mesh space where the structural elements are interconnected fills the internal space, the honeycomb material has a higher porosity and lower mass density than the matrix material, thus having a high specific stiffness, specific strength and specific energy absorption. In engineering applications, the honeycomb structure can protect the protective object from impact damage, therefore, in order to ensure the safety and stability of the protective object, it is usually required to max...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): F16F1/00B33Y80/00
CPCF16F1/00B33Y80/00Y02T50/40
Inventor 夏平赵峰刘前程付华余亚苹刘杰谢金鸿朱一坤
Owner CHENGDU UNIV
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