CN110043594A - A kind of enhanced lattice structure of node - Google Patents
A kind of enhanced lattice structure of node Download PDFInfo
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- CN110043594A CN110043594A CN201910398127.6A CN201910398127A CN110043594A CN 110043594 A CN110043594 A CN 110043594A CN 201910398127 A CN201910398127 A CN 201910398127A CN 110043594 A CN110043594 A CN 110043594A
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- lattice structure
- sphere
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- node
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16F—SPRINGS; SHOCK-ABSORBERS; MEANS FOR DAMPING VIBRATION
- F16F7/00—Vibration-dampers; Shock-absorbers
- F16F7/12—Vibration-dampers; Shock-absorbers using plastic deformation of members
- F16F7/128—Vibration-dampers; Shock-absorbers using plastic deformation of members characterised by the members, e.g. a flat strap, yielding through stretching, pulling apart
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- Engineering & Computer Science (AREA)
- General Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Shafts, Cranks, Connecting Bars, And Related Bearings (AREA)
Abstract
The invention discloses a kind of enhanced lattice structures of node, including multiple dot matrix unit cells for being repeated cyclically arrangement；The dot matrix unit cell includes the sphere nodes of multiple spatial distributions and the body of rod that is connected between the sphere nodes；Present invention application sphere nodes connect different bars in existing lattice structure, and through fillet, realize rod structure smooth transition, improve the mechanical property of lattice structure.
Description
Technical field
The present invention relates to material structure technical field more particularly to a kind of lattice structures.The lattice structure includes multiple weeks
Phase property repeated arrangement unit shows the other functions characteristic such as excellent mechanics with its lightweight, high-strength, beam drilling performance.
Background technique
Currently, with China's space flight, the rapid development of vehicle, light-weight design demand is increasingly strong.Guarantee performance and
Under the premise of safety, light-weight design can effectively save fuel, be the effective way for improving stroke.Lattice structure is by periodicity
Regular unit cell composition, has high specific strength, specific stiffness, low relative density and some specific functionalities (such as damping shock absorption, energy
Impact absorbing).Lattice structure is applied to the fields such as aerospace, automobile, there are huge potentiality.Such as patent
It is compound that a kind of period composite construction lattice material of CN201810419644.2- discloses a kind of periodicity with vibration damping, shock insulation
Lattice structure, a kind of lightweight space lattice structure of patent CN201810615351.1- disclose a kind of with high-intensitive light weight
Change space lattice structure.These lattice structures are all member structures, from the point of view of the compression response of current leverage lattice structure, are broken
Bad to show as integral slipping, local deformation, structural failure concentrates at node, connecting rod bend.How to solve first at node
It first destroys, the mechanical property for improving lattice structure is a urgent problem to be solved.In this regard, patent CN201510229244.1-
Variable cross-section metal lattice structure and its processing method disclose a kind of means by section gradual change come stress shape at concept transfer
State improves the lightweight nature of lattice structure.But due to its alternation of cross-section, it is contemplated that manufacture manufacturing tolerance, it is thinner in bar
Local foozle is bigger, reduces the mechanical property of lattice structure instead.
Summary of the invention
The purpose of the invention is to guarantee the reliability at the node of lattice structure, the mechanics of lattice structure is improved
Performance using sphere nodes in lattice structure, and connects different bars by fillet, realizes rod structure smooth transition, improve
The mechanical property of lattice structure.
The enhanced lattice structure of a kind of node of the invention, including multiple dot matrix unit cells for being repeated cyclically arrangement；It is described
Dot matrix unit cell includes the sphere nodes of multiple spatial distributions and the body of rod that is connected between the sphere nodes；
Further, the junction of the body of rod and sphere nodes is seamlessly transitted by fillet；
Further, the proportional region of the sphere nodes sphere diameter and shank diameter is 4:3~2:1；
Further, the ratio of the sphere nodes sphere diameter and shank diameter is 3:2；
Further, the dot matrix unit cell is diamond lattice structure；
Further, the bar diameter of the body of rod is 0.18mm, a length of 2mm of unit cell rib, the sphere diameter of sphere nodes in the dot matrix unit cell
For 0.27mm；Fillet diameter between the body of rod and sphere nodes is 0.1mm.
The invention has the benefit that
1. in lattice structure of the invention, connected between each body of rod using sphere nodes, improve node connection can
By property, to improve the mechanical property of lattice structure.
2. in lattice structure of the invention, seamlessly transitting between the body of rod and sphere nodes using fillet, rod piece and section are realized
The submissive transition of point reduces stress and concentrates, to improve the mechanical property of lattice structure.
3. the distribution of lattice structure node of the present invention and the body of rod uses diamond lattice structure, bearing capacity is stronger, has
Bigger specific strength, specific stiffness, improve its lightweight application.
Detailed description of the invention
Further explanation of the technical solution of the present invention with reference to the accompanying drawings and examples:
Fig. 1 is common diamond lattice structure single cell model；
Fig. 2 is the diamond lattice structure single cell model using sphere nodes；
Fig. 3 is the lattice structure single cell model of node submissiveization processing；
Fig. 4 is the overall structure diagram of the diamond lattice structure obtained by unit cell periodic arrangement；
Fig. 5 is the overall structure diagram using the lattice structure of sphere nodes；
Fig. 6 is the overall structure diagram of the lattice structure using sphere nodes and by the processing of node submissiveization；
Fig. 7 is the stress-strain diagram for the diamond lattice structure that different sphere nodes diameters obtain；
Fig. 8 is the stress-strain diagram of three kinds of lattice structures under static compress response.
Specific embodiment
Fig. 1 is the structural schematic diagram of the present embodiment；As shown, a kind of enhanced point of node of the invention of the present embodiment
Battle array structure, including multiple dot matrix unit cells for being repeated cyclically arrangement；The dot matrix unit cell includes the spherical node of multiple spatial distributions
Point and the body of rod being connected between the sphere nodes；Wherein, the space layout of node and the body of rod can be using including background skill
Existing any form of lattice structure in art including cited structure, by increasing spherical node at each node of unit cell
Point, to realize integrally-built sphere nodes connection, so that lattice structure is enhanced at node.Lattice structure form
Appearance is that node is coarse, and the rod piece between node is smaller；
In the present embodiment, it is existing that node and the body of rod distribution of lattice structure use diamond lattice structure as shown in Figure 1
Diamond lattice structure single cell model, Fig. 4 are the overall structure diagram of the diamond lattice structure obtained by periodic arrangement,
Fig. 2 is using the unit cell schematic diagram after sphere nodes, and Fig. 5 show the single cell structure and passes through the overall structure that periodic arrangement obtains
Schematic diagram is arranged in direction in space by three layers of unit cell, combines closely between unit cell, pass through the group of entities in Boolean calculation
The integraty for constructing entire lattice structure is closed, guarantees the continuity and integrality of structure；Since existing leverage lattice structure is lost
Effect is usually focused at node, therefore application sphere nodes can increase substantially lattice structure in existing lattice structure
Mechanical property.
In preferred embodiment, the junction of the body of rod and sphere nodes is seamlessly transitted by fillet, such as the institute of Fig. 3 and 6
Show, using in the body of rod and section in the mutability in view of being connected between sphere nodes and dot matrix leverage, this preferred embodiment
The transition of rounded corner mode is sampled between point, Lai Shixian rod piece is smoothly connected with sphere nodes, ensure that the surface of lattice structure gradually
Become, be easy to the manufacture processing of lattice structure, appearance forrns show as bar and smoothly transit with node, no Characteristics of Mutation, wherein justifying
Angular diameter choose it is related with sphere nodes sphere diameter and bar diameter, for realize bar and node gradual change, be considered as manufacture process and it is right
The influence of sphere nodes itself.
In preferred embodiment, the proportional region of the sphere nodes sphere diameter and shank diameter is 4:3~2:1；The section
Point sphere diameter selection is related with bar diameter, verifies calculating analysis by finite element and finds, compared with small pole diameter for structural behaviour reinforcing effect
It is not very obvious, although larger bar diameter can slightly improve lattice structure performance, increase the whole matter of lattice structure again simultaneously
Amount, is runed counter to hence for the original intention of the light-weight design of lattice structure, thus, sphere nodes sphere diameter selected by the present embodiment exists
Comprehensive mechanical property it is optimal it is most light with relative mass under the premise of carried out preferably, what Fig. 7 was indicated is that different spherical sphere diameters obtain
Diamond lattice structure stress-strain diagram, diameter proportion indicate is sphere nodes sphere diameter and shank diameter ratio,
It can be found that mechanical property promotion is unobvious, and (compression strength is only promoted when sphere nodes sphere diameter is smaller (4/3 times of bar diameter)
6%), when sphere nodes are excessive (2 times of bar diameters), mechanical property does not obtain one and accordingly increases, therefore, the present embodiment
By the control of the proportional region of sphere nodes sphere diameter and shank diameter between 4:3~2:1, the power of lattice structure can be significantly improved
Performance is learned, while the unobvious self weight for increasing total again.
In preferred embodiment, the ratio of the sphere nodes sphere diameter and shank diameter is 3:2；As shown in Figure 7, spherical node
When point sphere diameter is 3/2 times of bar diameter, the comprehensive performance of lattice structure is best.
In preferred embodiment, the diameter of the body of rod is 0.18mm, a length of 2mm of unit cell rib, spherical node in the dot matrix unit cell
The sphere diameter of point is 0.27mm；Fillet diameter between the body of rod and sphere nodes is 0.1mm, and sphere nodes are straight in the present embodiment
The selection of diameter and shank diameter follows the selection principle in above-described embodiment.Eventually pass through Finite Element Simulation Analysis obtain it is quiet
The stress-strain diagram of three kinds of lattice structures under state compression response, is shown in Fig. 8.By further calculating analysis, discovery: compared to
Traditional diamond lattice structure, the enhanced lattice structure elasticity modulus of node improve 20%, and compressive ultimate strength improves
18%, it is enhanced compared with node roughly the same by submissiveization diamond lattice structure its elasticity modulus obtained after rounded corner, but
It is that its compression strength compared with normal diamond lattice structure enhances 26.5%.Mechanical property is realized by the micro-variations to structure
The further promotion of energy.
Finally, it is stated that the above examples are only used to illustrate the technical scheme of the present invention and are not limiting, although referring to compared with
Good embodiment describes the invention in detail, those skilled in the art should understand that, it can be to skill of the invention
Art scheme is modified or replaced equivalently, and without departing from the objective and range of technical solution of the present invention, should all be covered at this
In the scope of the claims of invention.
Claims (6)
1. a kind of enhanced lattice structure of node, it is characterised in that: including multiple dot matrix unit cells for being repeated cyclically arrangement；It is described
Dot matrix unit cell includes the sphere nodes of multiple spatial distributions and the body of rod that is connected between the sphere nodes.
2. the enhanced lattice structure of a kind of node according to claim 1, it is characterised in that: the body of rod and sphere nodes
Junction pass through fillet seamlessly transit.
3. the enhanced lattice structure of a kind of node according to claim 2, it is characterised in that: the sphere nodes diameter with
The proportional region of shank diameter is 4:3~2:1.
4. the enhanced lattice structure of a kind of node according to claim 3, it is characterised in that: the sphere nodes sphere diameter with
The ratio 3:2 of shank diameter.
5. the enhanced lattice structure of a kind of node according to claim 4, it is characterised in that: the dot matrix unit cell is Buddha's warrior attendant
Stone lattice structure.
6. the enhanced lattice structure of a kind of node according to claim 5, it is characterised in that: the body of rod in the dot matrix unit cell
Diameter be 0.18mm, a length of 2mm of unit cell rib, the sphere diameters of sphere nodes is 0.27mm；Between the body of rod and sphere nodes
Fillet diameter is 0.1mm.
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Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110705093A (en) * | 2019-09-29 | 2020-01-17 | 北京星航机电装备有限公司 | Lightweight lattice structure parametric modeling and data lightweight processing method |
| CN112283277A (en) * | 2020-09-19 | 2021-01-29 | 重庆大学 | Composite lattice structure integrating structure bearing and vibration control and preparation method thereof |
| CN112343195A (en) * | 2020-09-22 | 2021-02-09 | 重庆大学 | SMA (shape memory alloy) lattice structure with integrated material and function, vibration isolator and manufacturing method of vibration isolator |
| CN112848553A (en) * | 2021-01-21 | 2021-05-28 | 北京理工大学 | Reinforced single cell structure, preparation method and application thereof, and sandwich board |
| CN113255183A (en) * | 2021-05-08 | 2021-08-13 | 燕山大学 | Simulation method for spherical node reinforced variable cross-section beam |
| CN113730661A (en) * | 2021-08-10 | 2021-12-03 | 北京工业大学 | Multilayer lattice material structure |
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Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110705093A (en) * | 2019-09-29 | 2020-01-17 | 北京星航机电装备有限公司 | Lightweight lattice structure parametric modeling and data lightweight processing method |
| CN112283277A (en) * | 2020-09-19 | 2021-01-29 | 重庆大学 | Composite lattice structure integrating structure bearing and vibration control and preparation method thereof |
| CN112343195A (en) * | 2020-09-22 | 2021-02-09 | 重庆大学 | SMA (shape memory alloy) lattice structure with integrated material and function, vibration isolator and manufacturing method of vibration isolator |
| CN112848553A (en) * | 2021-01-21 | 2021-05-28 | 北京理工大学 | Reinforced single cell structure, preparation method and application thereof, and sandwich board |
| CN113255183A (en) * | 2021-05-08 | 2021-08-13 | 燕山大学 | Simulation method for spherical node reinforced variable cross-section beam |
| CN113730661A (en) * | 2021-08-10 | 2021-12-03 | 北京工业大学 | Multilayer lattice material structure |
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Application publication date: 20190723 |