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A composite negative stiffness energy-absorbing honeycomb structure and its preparation method

A honeycomb structure, negative stiffness technology, applied in mechanical equipment, shock absorbers, instruments, etc., can solve the problems of low reusability, poor energy absorption effect, low strength, etc., to achieve high reusability energy absorption, energy Effects of improved absorption and improved positive stiffness

Active Publication Date: 2021-04-02
HARBIN INST OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0007] The purpose of the present invention is to provide a composite negative stiffness energy absorbing honeycomb structure and its preparation method in order to solve the problems of low reusability, low strength and poor energy absorption effect of the existing negative stiffness structure

Method used

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  • A composite negative stiffness energy-absorbing honeycomb structure and its preparation method
  • A composite negative stiffness energy-absorbing honeycomb structure and its preparation method
  • A composite negative stiffness energy-absorbing honeycomb structure and its preparation method

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specific Embodiment approach 1

[0028] Specific Embodiment 1: A composite negative stiffness energy-absorbing honeycomb structure of this embodiment, which is interlocked by four inserts 1 to form a "well"-shaped structure; each insert 1 is made of It is surrounded by hard-shaped material body 2, "T"-shaped connecting platform 3 and curved beam 4;

[0029] The "King" shaped hard material body 7 is placed laterally, and is divided into four parts along the central axis and the vertical line of the "King" shaped hard material body 7. Shape hard material body 2; each The hard-shaped material body 2 is made up of two vertical support bodies 2-1 and a horizontal support body 2-2; two vertical support body 2-1 upper end inner sidewalls respectively offer a groove-5; 4 Both ends are respectively connected to the bottom of the groove 1 5, and the groove 1 5 is divided into two grooves; the upper surface of the middle part of the curved beam 4 is connected to the bottom of the "T"-shaped connecting platform 3, an...

specific Embodiment approach 2

[0031] Embodiment 2: The difference between this embodiment and Embodiment 1 is that the curved beam 4 is "wave-shaped", and its upper part is a convex arc edge, and its lower part is a concave arc edge. Others are the same as in the first embodiment.

specific Embodiment approach 3

[0032] Embodiment 3: This embodiment differs from Embodiment 1 in that: the length of the curved beam 4 is 90-95 mm, the thickness is 0.5-1.5 mm, and the height is 9-10 mm. Others are the same as in the first embodiment.

[0033] The optimal length of the curved beam 4 in this embodiment is 93.88 mm, the thickness is 1 mm, and the height is 9.6 mm.

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Abstract

The invention discloses a composite negative-stiffness energy absorption honeycomb structure and a preparation method thereof, and relates to a composite negative-stiffness energy absorption honeycombstructure. The problems that the number of times of reutilization of an existing negative-stiffness is small, strength is low, and the energy absorption effect is poor are solved. The design philosophy of a composite is used for design of the negative-stiffness structure, two materials of combining a soft material and a hard material are adopted for constructing the negative-stiffness through thecharacteristics that the stress features of all parts are different and stress distribution is not uniform in the deformation process of the negative-stiffness, and the aims of reducing weight and improving the mechanical performance of the structure are achieved on the basis of guaranteeing high-frequency reutilization. Preparation of the composite negative-stiffness honeycomb structure is completed mainly through the additive manufacturing technology such as the SLS technology, the FDM technology and the SLM technology. A new direction is provided for improving energy absorption of metamaterials. The composite negative-stiffness energy absorption honeycomb structure is applied to the field of metamaterials.

Description

technical field [0001] The invention relates to the design of composite negative stiffness structure and its preparation method, in particular to the design of composite negative stiffness honeycomb structure and its preparation method. Background technique [0002] Metamaterials are unconventional materials with special microstructural forms different from natural materials and traditional artificial materials. Metamaterials include electromagnetic metamaterials, optical metamaterials, acoustic metamaterials, and mechanical metamaterials, among which negative stiffness metamaterials belong to the category of mechanical metamaterials. [0003] Negative stiffness metamaterials are reusable, and they can self-restore or return to their original shape through simple methods after being deformed by force. Reusable materials conform to the international material development trend and are an important manifestation of environmental friendliness. Negative stiffness metamaterials c...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): F16F7/00G06F30/17G06F119/14
CPCF16F7/00
Inventor 王兵陈帅谭小俊朱绍伟邹亚军胡记强王连超连续
Owner HARBIN INST OF TECH
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