Lattice structure and its unit structure, lattice sandwich structure

A lattice structure and unit structure technology, applied in the field of energy-absorbing materials, can solve the problems of irreversible deformation, structural plastic deformation, and reduced impact resistance, and achieve the effect of reducing plastic strain.

Active Publication Date: 2021-05-04
INST OF FLEXIBLE ELECTRONICS TECH OF THU ZHEJIANG +1
View PDF7 Cites 0 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The stress-strain curve of the tetrahedral lattice material after compression is as follows image 3 shown, from image 3 It can be seen that since the stress of the structure is always greater than 0, during the compression process, the structure is always only the stable structure of the initial structure. When subjected to a huge impact load, the structure will undergo a large plastic deformation, and its impact resistance will be extremely low. big drop
[0007] Therefore, although square thin-walled energy-absorbing beams, egg-box structural materials, foam metal materials, and lattice materials all have good energy-absorbing properties, they also have the defects of irreversible deformation and difficult preparation, which greatly limit energy-absorbing properties. Material range and repeatability

Method used

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
View more

Image

Smart Image Click on the blue labels to locate them in the text.
Viewing Examples
Smart Image
  • Lattice structure and its unit structure, lattice sandwich structure
  • Lattice structure and its unit structure, lattice sandwich structure
  • Lattice structure and its unit structure, lattice sandwich structure

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0057] Such as Figure 4 and Figure 5 As shown, the unit structure 1 based on the lattice structure provided by this embodiment includes a first base 10, a second base 12, and a connecting rod 11 connecting the first base 10 and the second base 12 .

[0058] Taking x as the horizontal plane and y as the vertical plane as the reference coordinate system, in the normal placement state, the angle between the connecting rod and the horizontal plane is set as θ. The length of the connecting rod is L, the width of the connecting rod along the cross section perpendicular to the vertical plane where the central axis is located is W, and the thickness of the connecting rod along the cross section perpendicular to the vertical plane where the central axis is located is T .

[0059] Take θ=45°, W / L=0.12, T≤W as the first parameter design of the connecting rod 11 in this embodiment as an example. At this time, the rod 11 is an Euler-Bernoulli beam, and it is analyzed using a numerica...

Embodiment 2

[0080] Such as Figure 17 As shown, this embodiment is based on the embodiment 1, and the surrounding side of the connecting rod 11 is provided with a reinforcing part 102 , and the reinforcing part 102 is used to locally adjust the energy absorption curve of the unit structure 1 .

[0081] The length of the reinforcing part 102 along the length direction of the connecting rod 11 is L 1 , the width along the cross-section perpendicular to the vertical plane is W 1 , where, 0.05≤L 1 / L≤0.15, 1.1≤W 1 / W≤1.2.

[0082]With θ=45°, W / L=0.1, T≤W, L 1 / L=0.5,W 1 / W=1.1 is an example of the parameter design of the connecting rod 11 in this embodiment, and the numerical simulation method (plane strain model) is used for analysis. Its force-displacement curve is as Figure 18 As shown, the strain energy-displacement curve is shown as Figure 19 shown. and Figure 13 and Figure 14 It can be seen from the comparison that the reinforcement part 102 can be used to locally adjust ...

Embodiment 3

[0089] Such as Figure 20 As shown, in this embodiment, on the basis of Embodiment 1, the connecting base 101 is provided with a splicing structure 103, and the splicing structure 103 is used for splicing and fixing different unit structures 1, or, The splicing structure 103 can also be used for splicing and fixing with an external mechanism.

[0090] Wherein, the splicing structure 103 is an insertion part or a groove part that can be engaged with the insertion part, and the splicing structures 103 that are spliced ​​with each other are designed in cooperation.

[0091] Specifically, the splicing structure 103 provided on the connecting seat 101 of the first base 10 of one unit structure 1 can engage with the splicing structure 103 provided on the connecting seat 101 of the first base 10 of another unit structure 1, or can be engaged with another The splicing structure 103 provided on the connecting seat 101 of the second base 12 of a unit structure 1 can be engaged. For ex...

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to view more

PUM

No PUM Login to view more

Abstract

The invention relates to a lattice structure and its unit structure, and a lattice sandwich structure. The unit structure includes a first base, a second base, and a connecting rod connecting the first base and the second base; the angle between the connecting rod and the horizontal plane is set to θ, 40 °≤θ≤50°, wherein: the length of the connecting rod is L, the width of the cross-section of the connecting rod along the vertical plane perpendicular to the central axis is W, and the connecting rod is along the vertical plane perpendicular to the central axis. The thickness of the straight cross-section is T, and T≤W, 0.1≤W / L≤0.15. The plastic strain of the unit structure of the present invention is small, the adjustment of the energy absorption curve can be realized through the design of the parameters of the unit structure, and the unit structure can be restored to deformation by the action of an external force, and can be reused, thereby expanding the splicing of the lattice unit. The application range of lattice structure and lattice sandwich structure.

Description

technical field [0001] The invention relates to the technical field of energy-absorbing materials, in particular to a lattice structure and its unit structure, and a lattice sandwich structure. Background technique [0002] Energy-absorbing materials are widely used in personnel protection, building shock absorption, impact resistance of automobiles and aircraft, and protection of precision parts. Traditional energy-absorbing materials include square thin-walled beams, bellows, honeycomb structure materials, egg-box structure materials, foam metal materials, lattice materials, etc. [0003] Among them, the square thin-walled beam has a simple structure and strong energy absorption capacity, and is widely used in the collision energy absorption of automobiles. Such as figure 1 As shown, when subjected to an impact load, the square thin-walled beam undergoes lateral buckling, causing the metal material to undergo plastic deformation, thereby absorbing the impact force. The ...

Claims

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to view more

Application Information

Patent Timeline
no application Login to view more
Patent Type & Authority Patents(China)
IPC IPC(8): B32B3/22B32B33/00
CPCB32B3/22B32B33/00B32B2307/56B32B2307/732
Inventor 冯雪付浩然
Owner INST OF FLEXIBLE ELECTRONICS TECH OF THU ZHEJIANG
Who we serve
  • R&D Engineer
  • R&D Manager
  • IP Professional
Why Eureka
  • Industry Leading Data Capabilities
  • Powerful AI technology
  • Patent DNA Extraction
Social media
Try Eureka
PatSnap group products

Browse by: Latest US Patents, China's latest patents, Technical Efficacy Thesaurus, Application Domain, Technology Topic.

© 2024 PatSnap. All rights reserved.Legal|Privacy policy|Modern Slavery Act Transparency Statement|Sitemap