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A construction method of relative density function of bionic hierarchical honeycomb-like sandwich structure

A honeycomb sandwich structure, relative density technology, applied in design optimization/simulation, electrical digital data processing, special data processing applications, etc. application and other issues to achieve the effect of improving bearing performance and avoiding low strength

Active Publication Date: 2022-08-05
CHINA THREE GORGES UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, due to the complexity of the core structure of most sandwich structures, it is more difficult to study the mechanical properties, resulting in the failure of many new sandwich structures to be better popularized and applied in engineering.

Method used

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  • A construction method of relative density function of bionic hierarchical honeycomb-like sandwich structure
  • A construction method of relative density function of bionic hierarchical honeycomb-like sandwich structure
  • A construction method of relative density function of bionic hierarchical honeycomb-like sandwich structure

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Embodiment 1

[0023] like Figure 1-4 As shown in the figure, a method for constructing a relative density function of a bionic hierarchical honeycomb sandwich structure is characterized by comprising the following steps:

[0024] Step 1: According to the evolution process of the bionic hierarchical honeycomb sandwich structure, the geometrical dimension relationship of each hierarchical honeycomb sandwich structure is constructed;

[0025] Step 2: Select representative honeycomb-like sandwich structures of various levels, and can form unit cells and multi-cellular hierarchical honeycomb-like sandwich structures by replicating and arranging them, and use them as the research object for the derivation of the relative density formula;

[0026] Step 3: Calculate the mass m of different levels of honeycomb sandwich structures respectively i and the equivalent mass m of the honeycomb sandwich structure at each level ce ;

[0027] Step 4: Use the principle of mass conservation before and after...

Embodiment 2

[0033] According to the unit cell principle, choose figure 2 The square unit cell shown, due to the complexity and symmetry of its structure, will be as Figure 4 The fishbone-like 1 / 4 sandwich structure is shown as the research object for the derivation of the relative density function.

[0034] Derive the relative density of grade 0 honeycomb-like sandwich structure:

[0035] The volume enclosed by the cell body is:

[0036]

[0037] In the formula: t is the thickness of the sandwich cell wall, the unit is mm; l is the height of the cell body, the unit is mm; h 0 and b 0 They are the quadrilateral side length and the octagonal side length of the 0-level honeycomb-like sandwich structure, and the unit is mm.

[0038] The mass of the cell body is:

[0039]

[0040] In the formula: ρ s is the density of the sandwich structure, in kg / m 3 ;

[0041] The volume of the quadrilateral enclosed by the equivalent solid model of the cell body is:

[0042]

[0043] The...

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Abstract

The invention provides a method for constructing a relative density function of a biomimetic hierarchical honeycomb-like sandwich structure, comprising the following steps: according to the evolution process of the bionic hierarchical honeycomb-like sandwich structure, on the premise that the size factor meets the geometrical evolution requirements, solve the mass of the sandwich material , the equivalent mass of the sandwich structure, using the principle of mass conservation before and after the equivalence, deduce the relative density formula; seek the change rule of the bionic hierarchical honeycomb sandwich structure from the first level to the n level, and summarize the relative density of the bionic hierarchical honeycomb sandwich structure. density function. The invention lays a foundation for the research on the mechanical properties of the bionic hierarchical honeycomb sandwich structure, and has important theoretical significance and practical application value.

Description

technical field [0001] The invention relates to the field of honeycomb sandwich structures, in particular to a method for constructing a relative density function of a bionic hierarchical honeycomb sandwich structure. Background technique [0002] After hundreds of millions of years of evolution, natural organisms have formed biological structures with good mechanical properties. Therefore, the introduction of biomimetic design concepts into lightweight and high-strength sandwich structures for innovative configurations has become a research hotspot in recent years. The hierarchical concept and porous honeycomb structure are combined to innovatively design a hierarchical honeycomb sandwich structure, which not only improves the designability of its structure, but also has the advantages of improving structural strength and energy absorption capacity. Different hierarchical structures will show different mechanical properties. . Inspired by the frog biological bone structure...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G06F30/20G06F119/14
CPCG06F30/20G06F2119/14
Inventor 王艳苗李响葛晓博宋小俊
Owner CHINA THREE GORGES UNIV
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