CN107023074B - A kind of lattice material with functionally gradient - Google Patents
A kind of lattice material with functionally gradient Download PDFInfo
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- CN107023074B CN107023074B CN201710231278.3A CN201710231278A CN107023074B CN 107023074 B CN107023074 B CN 107023074B CN 201710231278 A CN201710231278 A CN 201710231278A CN 107023074 B CN107023074 B CN 107023074B
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- E—FIXED CONSTRUCTIONS
- E04—BUILDING
- E04B—GENERAL BUILDING CONSTRUCTIONS; WALLS, e.g. PARTITIONS; ROOFS; FLOORS; CEILINGS; INSULATION OR OTHER PROTECTION OF BUILDINGS
- E04B1/00—Constructions in general; Structures which are not restricted either to walls, e.g. partitions, or floors or ceilings or roofs
- E04B1/18—Structures comprising elongated load-supporting parts, e.g. columns, girders, skeletons
- E04B1/19—Three-dimensional framework structures
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- E—FIXED CONSTRUCTIONS
- E04—BUILDING
- E04B—GENERAL BUILDING CONSTRUCTIONS; WALLS, e.g. PARTITIONS; ROOFS; FLOORS; CEILINGS; INSULATION OR OTHER PROTECTION OF BUILDINGS
- E04B1/00—Constructions in general; Structures which are not restricted either to walls, e.g. partitions, or floors or ceilings or roofs
- E04B1/62—Insulation or other protection; Elements or use of specified material therefor
- E04B1/92—Protection against other undesired influences or dangers
- E04B1/98—Protection against other undesired influences or dangers against vibrations or shocks; against mechanical destruction, e.g. by air-raids
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- E—FIXED CONSTRUCTIONS
- E04—BUILDING
- E04B—GENERAL BUILDING CONSTRUCTIONS; WALLS, e.g. PARTITIONS; ROOFS; FLOORS; CEILINGS; INSULATION OR OTHER PROTECTION OF BUILDINGS
- E04B1/00—Constructions in general; Structures which are not restricted either to walls, e.g. partitions, or floors or ceilings or roofs
- E04B1/18—Structures comprising elongated load-supporting parts, e.g. columns, girders, skeletons
- E04B1/19—Three-dimensional framework structures
- E04B2001/1978—Frameworks assembled from preformed subframes, e.g. pyramids
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Abstract
The invention discloses a kind of lattice materials with functionally gradient, it arranges to be formed by unit cell member lattice structure space continuation, unit cell member shape has pyramid, tetrahedron and other polyhedron-shaped, the short transverse of unit cell member is Z-direction, point on unit cell member bottom surface is located on X-Y plane, it is arranged by continuation of the unit cell meta structure on X and Y-direction, form monolithic lattice structure, in the continuation placement process, height between same layer in the Z-direction of unit cell member remains unchanged, the distance between two adjacent unit cell member bottom surface upper extreme points are unequal, the different monolithic lattice structure of height is subjected to mirror-symmetric extension arrangement by symmetrical plane of the X-Y plane where unit cell member vertex, form multilayer space lattice structure, the physical parameter of this lattice material changes in gradient with spatial position, from heavy and light, it can design Property it is strong, have excellent shock resistance, and draw materials conveniently, production method is simple, and application prospect is very considerable.
Description
Technical field
The invention belongs to engineering structure technical fields, and in particular to a kind of lattice material with functionally gradient.
Background technique
With the fast development of engineering technology, functionally graded material improve surface contact damage in terms of excellent properties by
Extensive concern, functionally graded material make the physical parameter of material with sky by changing the spatial variations gradient of microstructure
Between position change in gradient, lattice material have high porosity, can by the unit cell configuration to lattice structure design make dot matrix
Structure has the advantages that high specific strength, high specific stiffness, high-flexural strength, so that can save under the effect of identical structural bearing capacity big
The material of amount significantly reduces dead load, but current research many places promote and apply and need more in experimental level
Applied basic research is to adapt to the use environments of various complexity.
Summary of the invention
To solve the above problems, its physical parameter is such as the invention discloses a kind of lattice material with functionally gradient
Elasticity modulus, Poisson's ratio and density etc. change in gradient with spatial position.
In order to achieve the above objectives, technical scheme is as follows:
A kind of lattice material with functionally gradient, forming method are as follows:
1) it is arranged and is formed by space continuation by unit cell member, unit cell member is the rock-steady structure being made of rod piece, and shape has gold
Word tower, tetrahedron and other polyhedron-shaped；
2) rectangular coordinate system is defined, the short transverse of unit cell member is Z-direction, and the point on unit cell member bottom surface is flat positioned at X-Y
On face.It is arranged by continuation of the unit cell meta structure on X and Y-direction, forms monolithic lattice structure.In the continuation placement process
In, the height between same layer in the Z-direction of unit cell member remains unchanged, between two adjacent unit cell member bottom surface upper extreme points away from
From being unequal；
3) the different monolithic lattice structure of height is subjected to mirror image by symmetrical plane of the X-Y plane where unit cell member vertex
Symmetric extension arrangement, forms multilayer space lattice structure.
Functionally gradient lattice material in the present invention is by metal, fibre reinforced composites and other nonmetallic materials structures
At.
The gradient function of functionally gradient lattice material in the present invention is the height and list by controlling each layer of unit cell member
The distance between cell element bottom surface upper extreme point is realized.
The physical parameter of functionally gradient lattice material macroscopically in the present invention, such as elasticity modulus, Poisson's ratio and density
Change in gradient with spatial position.
The present disclosure applies equally to use the lattice structure of mixing unit cell meta structure form in same layer, such as in same layer
Using the identical pyramid unit cell member of height and tetrahedral unit cell member is staggered or the lattice structure of random alignment.
The beneficial effects of the present invention are:
A kind of lattice material with functionally gradient of the present invention is realized that lattice material has gradient function, is obtained
The lattice structure with functionally gradient was obtained, this lattice material with gradient function passes through the variation in microstructure space,
Change elasticity modulus, the Poisson's ratio etc. of material macroscopically in gradient on spatial position, it is light to have both dead load, designability
By force, there is excellent shock resistance, and structure materials are convenient, method is simple, and application prospect is very considerable.
Detailed description of the invention
Fig. 1 is the schematic diagram of Z-direction gradient function lattice material of the invention；
Fig. 2 is the elevation of pyramid unit cell member gradient function lattice material of the invention；
Fig. 3 is the schematic diagram of X, Y of the invention and Z-direction gradient function lattice material；
Fig. 4 is pyramid unit cell member schematic diagram of the invention；
Fig. 5 is positive tetrahedron type unit cell member schematic diagram of the invention.
Reference signs list:
Fig. 1 (a) is pyramid unit cell member one, and Fig. 1 (b) is the Z-direction mirror image of Fig. 1 (a) unit cell member one, and Fig. 1 (c) is golden word
Tower unit cell member two, Fig. 1 (d) are the Z-direction mirror image of Fig. 1 (c) unit cell member two, and Fig. 2 (a) is intermediate to edge gradually sparse type gradient
Function lattice material elevation, Fig. 2 (b) are intermediate to edge gradually tight type gradient function lattice material elevation, Fig. 3 (a)
For pyramid unit cell member three, Fig. 3 (b) is the Z-direction mirror image of Fig. 3 (a) unit cell member three, and Fig. 3 (c) is pyramid unit cell member four,
Fig. 3 (d) is the Z-direction mirror image of unit cell member four, and Fig. 4 (a) is pyramid unit cell member axonometric drawing, and Fig. 4 (b) is pyramid unit cell member
Elevation, Fig. 4 (c) are pyramid unit cell member orthographic drawing, and Fig. 5 (a) is positive tetrahedral unit cell member axonometric drawing, and Fig. 5 (b) is
Positive tetrahedron type unit cell member elevation, Fig. 5 (c) are positive tetrahedral unit cell member orthographic drawing, and 1,2,3,4,5,6 be pyramid
The endpoint of unit cell member rod piece.
Specific embodiment
With reference to the accompanying drawings and detailed description, the present invention is furture elucidated, it should be understood that following specific embodiments are only
For illustrating the present invention rather than limiting the scope of the invention.
Embodiment 1:
1) as shown in Figure 1, the present embodiment is pyramid unit cell member gradient function lattice material, there is ladder in z-direction
Function is spent, 1-6 is the endpoint for forming pyramid unit cell member rod piece, and (a) is pyramid unit cell member, the end on unit cell member bottom surface
Point is located on X-Y plane.Pyramid unit cell first (a) is subjected to mirror symmetry by symmetrical plane of the X-Y plane where vertex 1
Continuation arrangement, forms that unit cell is first (b), then by pyramid unit cell first (c) using the X-Y plane where vertex 6 as symmetrical plane into
Row mirror-symmetric extension arrangement, forms unit cell member (d), and so on, multilayer space lattice structure is formed, each layer of layer is a height of
2) by unit cell member between X and the carry out continuation arrangement in Y-direction, the endpoint during continuation on unit cell member bottom surface
Distance remain unchanged, i.e. L1=L2, L3=L4, pyramid cell element gradient function lattice material is formed, as shown in Fig. 2, wherein
(a) small for middle layer height, top and bottom tall and big, the h of layer1< h2< h3, lattice material is from centre to edge in gradually sparse type
Distribution, (b) tall and big for middle layer, top and bottom small, the h of layer height3>h2>h1, lattice material is from centre to edge in gradually close
The distribution of type.Pyramid dot matrix structure unit cell member such as Fig. 4, wherein (a) is pyramid unit cell member axonometric drawing, it (b) is pyramid
Type unit cell member elevation, (c) pyramid unit cell member orthographic drawing.
Embodiment 2:
1) as shown in figure 3, the present embodiment is pyramid unit cell member gradient function lattice material, have on X, Y and Z-direction
There is gradient function, pyramid unit cell first (a) is subjected to mirror-symmetric extension by symmetrical plane of the X-Y plane where vertex 1
Arrangement forms unit cell member (b), then pyramid unit cell first (c) is carried out mirror by symmetrical plane of the X-Y plane where vertex 2
As symmetric extension arrangement, unit cell member (d) is formed, and so on, form multilayer space lattice structure.
2) the carry out continuation arrangement by unit cell member on X and Y-direction, during continuation between the upper extreme point of unit cell member bottom surface
Distance changes, i.e. L1≠L2, L3≠L4, form X, Y and Z-direction gradient function lattice material.
Claims (4)
1. a kind of lattice material with functionally gradient, it is characterised in that: forming method is as follows:
1) it is arranged and is formed by space continuation by unit cell member, unit cell member is the rock-steady structure being made of rod piece, and shape has golden word
Tower, tetrahedron and other polyhedron-shaped；
2) rectangular coordinate system is defined, the short transverse of unit cell member is Z-direction, and the point on unit cell member bottom surface is located on X-Y plane,
It is arranged by continuation of the unit cell meta structure on X and Y-direction, forms monolithic lattice structure, it is same in the continuation placement process
Height between layer in the Z-direction of unit cell member remains unchanged, and the distance between two adjacent unit cell member bottom surface upper extreme points are not
Equal；
3) the different monolithic lattice structure of height is subjected to mirror image pair by symmetrical plane of the X-Y plane where unit cell member vertex
Claim continuation arrangement, forms multilayer space lattice structure.
2. a kind of lattice material with functionally gradient according to claim 1, it is characterised in that: functionally gradient lattice material
It is made of metal, fibre reinforced composites and other nonmetallic materials.
3. a kind of lattice material with functionally gradient according to claim 1, it is characterised in that: the gradient function of material
It is to be realized by the distance between the height of each layer of unit cell member of control and unit cell member bottom surface upper extreme point.
4. a kind of lattice material with functionally gradient according to claim 1, it is characterised in that: the object of material macroscopically
Property parameter: elasticity modulus, Poisson's ratio and density change in gradient with spatial position.
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| CN107774996B (en) * | 2017-10-11 | 2020-01-21 | 华中科技大学 | Integrated forming method for part of multi-material gradient lattice structure |
| CN108488309B (en) * | 2018-05-04 | 2024-04-26 | 东南大学 | Lattice material with periodic composite structure |
| CN108547053B (en) * | 2018-06-11 | 2023-07-25 | 宜兴市中碳科技有限公司 | Light sandwich layer mold and preparation method thereof |
| CN108824634B (en) * | 2018-06-14 | 2020-10-27 | 西北工业大学 | Light space lattice structure |
| CN109263788B (en) * | 2018-08-30 | 2020-08-04 | 中国人民解放军海军工程大学 | Submarine non-pressure-resistant shell pyramid lattice interlayer impact-resistant structure and design method thereof |
| CN109163212B (en) * | 2018-09-28 | 2021-09-24 | 西北工业大学 | Variable unit cell size-pyramid gradient lattice structure with transition layer |
| CN109635320A (en) * | 2018-11-02 | 2019-04-16 | 北京理工大学 | A kind of lattice structure of the high energy dissipation ability based on laser gain material manufacture |
| CN109869430B (en) * | 2019-03-20 | 2020-06-02 | 北京空间飞行器总体设计部 | Gradient lattice structure for additive manufacturing and design method thereof |
| CN110389070B (en) * | 2019-06-14 | 2021-09-03 | 重庆大学 | Method for determining high-strength and high-elasticity lattice material |
| CN111301717A (en) * | 2019-12-27 | 2020-06-19 | 北京空间技术研制试验中心 | Bulkhead structure of manned spacecraft sealed cabin |
| CN111720467B (en) * | 2020-06-08 | 2021-04-20 | 大连理工大学 | Lattice structure with stable zero Poisson ratio in large deformation state |
| CN111895015B (en) * | 2020-07-03 | 2022-07-08 | 重庆大学 | Variant gradient lattice structure based on additive manufacturing |
| CN112028658A (en) * | 2020-08-04 | 2020-12-04 | 中国航天科工飞航技术研究院（中国航天海鹰机电技术研究院） | Wave-transparent structure with controllable electromagnetic performance |
| CN112268092B (en) * | 2020-09-30 | 2022-05-27 | 重庆大学 | Lattice rheological intelligent structure and manufacturing method thereof |
| CN112287491B (en) * | 2020-12-28 | 2021-03-12 | 中国人民解放军国防科技大学 | Composite lattice material and design method thereof |
| CN114604406A (en) * | 2022-01-24 | 2022-06-10 | 重庆大学 | Steering engine shell with variable rigidity and integrated vibration reduction and protection, and manufacturing and using methods thereof |
| CN114560068A (en) * | 2022-01-26 | 2022-05-31 | 重庆大学 | Light electric steering engine shock resistance base and shell based on gradient lattice structure |
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| US6931812B1 (en) * | 2000-12-22 | 2005-08-23 | Stephen Leon Lipscomb | Web structure and method for making the same |
| CA2772768A1 (en) * | 2009-09-03 | 2011-03-10 | Molecular Nanosystems, Inc. | Methods and systems for making electrodes having at least one functional gradient therein and devices resulting therefrom |
| CN102416713B (en) * | 2011-08-16 | 2014-04-23 | 西安交通大学 | Lattice-gradient foamed aluminum composite material and preparation method thereof |
| CN102898172B (en) * | 2012-11-06 | 2013-11-13 | 哈尔滨理工大学 | Cf/SiC dot matrix composite flat plate with rectangular pyramid structure and preparation method for flat plate |
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