CN110435256B - Rectangular tube unit cell absolute poisson ratio honeycomb sandwich structure and preparation method thereof - Google Patents
Rectangular tube unit cell absolute poisson ratio honeycomb sandwich structure and preparation method thereof Download PDFInfo
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- CN110435256B CN110435256B CN201910814475.7A CN201910814475A CN110435256B CN 110435256 B CN110435256 B CN 110435256B CN 201910814475 A CN201910814475 A CN 201910814475A CN 110435256 B CN110435256 B CN 110435256B
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- 238000002360 preparation method Methods 0.000 title abstract description 23
- 229910052751 metal Inorganic materials 0.000 claims abstract description 72
- 239000002184 metal Substances 0.000 claims abstract description 72
- 238000003466 welding Methods 0.000 claims abstract description 9
- 238000004519 manufacturing process Methods 0.000 claims abstract description 5
- 238000000034 method Methods 0.000 claims description 9
- 229910000838 Al alloy Inorganic materials 0.000 claims description 7
- 239000010935 stainless steel Substances 0.000 claims description 7
- 229910001220 stainless steel Inorganic materials 0.000 claims description 7
- 238000004140 cleaning Methods 0.000 claims description 4
- JEIPFZHSYJVQDO-UHFFFAOYSA-N iron(III) oxide Inorganic materials O=[Fe]O[Fe]=O JEIPFZHSYJVQDO-UHFFFAOYSA-N 0.000 claims description 4
- 238000010521 absorption reaction Methods 0.000 abstract description 5
- 230000000704 physical effect Effects 0.000 abstract description 5
- 230000001747 exhibiting effect Effects 0.000 abstract description 4
- 241000264877 Hippospongia communis Species 0.000 description 24
- 150000002739 metals Chemical class 0.000 description 4
- 238000005238 degreasing Methods 0.000 description 3
- 229910052782 aluminium Inorganic materials 0.000 description 2
- XAGFODPZIPBFFR-UHFFFAOYSA-N aluminium Chemical compound [Al] XAGFODPZIPBFFR-UHFFFAOYSA-N 0.000 description 2
- 230000009286 beneficial effect Effects 0.000 description 2
- 238000010586 diagram Methods 0.000 description 2
- 230000000694 effects Effects 0.000 description 2
- 238000001125 extrusion Methods 0.000 description 2
- 239000000463 material Substances 0.000 description 2
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B32—LAYERED PRODUCTS
- B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
- B32B15/00—Layered products comprising a layer of metal
- B32B15/18—Layered products comprising a layer of metal comprising iron or steel
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B32—LAYERED PRODUCTS
- B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
- B32B15/00—Layered products comprising a layer of metal
- B32B15/20—Layered products comprising a layer of metal comprising aluminium or copper
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B32—LAYERED PRODUCTS
- B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
- B32B3/00—Layered products comprising a layer with external or internal discontinuities or unevennesses, or a layer of non-planar shape; Layered products comprising a layer having particular features of form
- B32B3/26—Layered products comprising a layer with external or internal discontinuities or unevennesses, or a layer of non-planar shape; Layered products comprising a layer having particular features of form characterised by a particular shape of the outline of the cross-section of a continuous layer; characterised by a layer with cavities or internal voids ; characterised by an apertured layer
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B32—LAYERED PRODUCTS
- B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
- B32B7/00—Layered products characterised by the relation between layers; Layered products characterised by the relative orientation of features between layers, or by the relative values of a measurable parameter between layers, i.e. products comprising layers having different physical, chemical or physicochemical properties; Layered products characterised by the interconnection of layers
- B32B7/04—Interconnection of layers
- B32B7/08—Interconnection of layers by mechanical means
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Abstract
The invention belongs to the field of sandwich structure preparation, in particular to a rectangular tube single-cell absolute poisson ratio honeycomb sandwich structure and a preparation method thereof, and aims to provide a rectangular tube core which is formed by stacking rectangular tubes serving as single-cell combinations and a rectangular tube core forming the rectangular tube single-cell absolute poisson ratio honeycomb sandwich structure and the preparation method thereof. A rectangular tube unit cell absolute Poisson ratio honeycomb sandwich structure: the pipe is prepared by welding a metal front panel, a rectangular pipe core and a metal rear panel. Under tensile load, the structure core shrinks inwards and shows the property of positive Poisson ratio; upon compressive loading, the core still contracts inwardly, exhibiting negative poisson's ratio properties. Compared with the traditional honeycomb structure, the negative poisson ratio structure has better mechanical and physical properties, such as energy absorption property, shear modulus, impact resistance and the like. And the structure is simple and practical in preparation process, and easy to realize flow production.
Description
Technical Field
The invention belongs to the field of sandwich structure preparation, and particularly relates to a rectangular tube unit cell absolute poisson ratio honeycomb sandwich structure and a preparation method thereof.
Background
Poisson's ratio was first discovered and proposed by French scientist Simon Poisson (Simon Denis Poisson, 1781-. Conventional honeycombs generally have a positive poisson's ratio, i.e., the transverse dimension is shortened when subjected to axial tension; while the negative poisson's ratio expands in lateral dimension when subjected to axial tension. Compared with the traditional honeycomb material, the negative poisson ratio material has better mechanical and physical properties, such as energy absorption property, shear modulus, impact resistance, fracture toughness and the like.
Disclosure of Invention
The invention aims to provide a rectangular tube core which is formed by stacking rectangular tubes serving as unit cells to form a rectangular tube unit cell absolute Poisson's ratio honeycomb sandwich structure. The invention also aims to provide a preparation method of the rectangular tube unit cell absolute Poisson's ratio honeycomb sandwich structure by taking the rectangular tube as the unit cell.
In order to realize the purpose of the invention, the technical scheme is as follows:
a rectangular tube unit cell absolute Poisson's ratio honeycomb sandwich structure is composed of a metal front panel 1, a rectangular tube core 2 and a metal rear panel 3.
The rectangular tube cores are formed by stacking rectangular tube unit cells, in the stacking process, gaps with the same size are reserved between the rectangular tube unit cells adjacent to each layer of rectangular tube cores, the middle points of the gaps are aligned with the middle points of the long sides of the cross sections of the rectangular tube unit cells adjacent to each layer, the long sides of the rectangular tube unit cells are parallel to the panel, and the short sides of the rectangular tube unit cells are perpendicular to the panel.
The sizes of the metal front panel 1 and the metal rear panel 3 are determined by the height of a rectangular tube core after rectangular tube unit cells are stacked and the length of a single rectangular tube unit cell, one side of the metal front panel 1 and one side of the metal rear panel 3 are equal to the length of the whole stacked rectangular tube core, and the other side of the metal front panel is equal to the length of the side perpendicular to the rectangular section.
The metal front panel 1 and the metal rear panel 3 are made of the same or different metals, the rectangular tube core 2 is made of the same metal, and the metal is aluminum alloy or stainless steel.
A preparation method of a rectangular tube unit cell absolute Poisson's ratio honeycomb sandwich structure comprises the following steps:
the method comprises the following steps: selecting a metal rectangular pipe and a metal panel;
step two: cleaning, degreasing and rust removing treatment are carried out on the metal front panel 1, the metal rear panel 3 and the rectangular pipe core 2;
step three: gaps with the same size are reserved between adjacent rectangular tube unit cells of each layer of rectangular tube cores, the middle points of the gaps are aligned with the middle points of the long edges of the sections of the adjacent rectangular tubes, and the integral rectangular tube cores are obtained by welding;
step four: and welding the integral rectangular tube core with the metal front panel and the metal rear panel respectively to obtain the rectangular tube unit cell absolute Poisson's ratio honeycomb sandwich structure.
In addition, the honeycomb sandwich structure with rectangular tube unit cell absolute poisson ratio can also be directly obtained by extrusion molding of aluminum.
The invention has the beneficial effects that:
under tensile load, the structural core shrinks inwards and shows the property of positive Poisson ratio. Upon compressive loading, the core still contracts inwardly, exhibiting negative poisson's ratio properties. Compared with the traditional honeycomb structure, the negative poisson ratio structure has better mechanical and physical properties, such as energy absorption property, shear modulus, impact resistance and the like. And the structure is simple and practical in preparation process, and easy to realize flow production.
Drawings
FIG. 1 is a schematic diagram of a rectangular tube unit cell structure;
FIG. 2 is a schematic diagram of a cell stack assembly;
FIG. 3 is a schematic view of the sandwich structure assembly.
Detailed Description
The present invention will be described in further detail with reference to the accompanying drawings and specific embodiments.
As shown in fig. 1-3: the metal front panel comprises a metal front panel 1, a rectangular tube core 2 and a metal rear panel 3.
The invention belongs to the field of sandwich structure preparation, and particularly relates to a rectangular tube unit cell absolute poisson ratio honeycomb sandwich structure and a preparation method thereof. Aims to provide a rectangular tube core formed by stacking rectangular tubes serving as unit cell combinations to form a rectangular tube unit cell absolute Poisson's ratio honeycomb sandwich structure and a preparation method thereof.
In order to realize the purpose of the invention, the technical scheme is as follows:
a rectangular tube unit cell absolute Poisson's ratio honeycomb sandwich structure is composed of a metal front panel 1, a rectangular tube core 2 and a metal rear panel 3.
The rectangular tube cores are formed by stacking rectangular tube unit cells, in the stacking process, gaps with the same size are reserved between the rectangular tube unit cells adjacent to each layer of rectangular tube cores, the middle points of the gaps are aligned with the middle points of the long sides of the cross sections of the rectangular tube unit cells adjacent to each layer, the long sides of the rectangular tube unit cells are parallel to the panel, and the short sides of the rectangular tube unit cells are perpendicular to the panel.
The sizes of the metal front panel 1 and the metal rear panel 3 are determined by the length of a rectangular tube core after rectangular tube unit cells are stacked and the length of a single rectangular tube unit cell, one side of the metal front panel 1 and one side of the metal rear panel 3 are equal to the length of the whole stacked rectangular tube core, and the other side of the metal front panel is equal to the length of the side perpendicular to the rectangular section.
The metal front panel 1 and the metal rear panel 3 are made of the same or different metals, the rectangular tube core 2 is made of the same metal, and the metal is aluminum alloy or stainless steel.
A preparation method of a rectangular tube unit cell absolute Poisson's ratio honeycomb sandwich structure comprises the following steps:
the method comprises the following steps: selecting a metal rectangular pipe, a metal front panel and a metal rear panel;
step two: cleaning, degreasing and rust removing treatment are carried out on the metal front panel 1, the metal rear panel 3 and the rectangular pipe core 2;
step three: gaps with the same size are reserved between adjacent rectangular tube unit cells of each layer of rectangular tube cores, the middle points of the gaps are aligned with the middle points of the long edges of the sections of the adjacent rectangular tubes, and the integral rectangular tube cores are obtained by welding;
step four: and welding the integral rectangular tube core with the metal front panel and the metal rear panel respectively to obtain the rectangular tube single-cell absolute Poisson's ratio honeycomb sandwich structure.
The invention has the beneficial effects that:
under tensile load, the structural core shrinks inwards and shows the property of positive Poisson ratio. Upon compressive loading, the core still contracts inwardly, exhibiting negative poisson's ratio properties. Compared with the traditional honeycomb structure, the negative poisson ratio structure has better mechanical and physical properties, such as energy absorption property, shear modulus, impact resistance and the like. And the structure is simple and practical in preparation process, and easy to realize flow production.
Described in further detail below:
the invention relates to a novel rectangular tube unit cell absolute Poisson's ratio honeycomb sandwich structure formed by stacking rectangular tubes serving as unit cells and a preparation method thereof.
The purpose of the invention is realized by the following technical method:
the sandwich structure formed by stacking single rectangular tubes as unit cells consists of a metal front panel 1, a rectangular tube core 2 and a metal rear panel 3.
The core is formed by stacking rectangular tubes in the figure 1, gaps with the same size are reserved between adjacent unit cells of each layer of core, the middle points of the gaps are aligned with the middle points of the long sides of the sections of the adjacent rectangular tubes, the specific unit cell size is l, d and t, the specific size can be selected according to different conditions, but the size of each rectangular tube is completely equal. Wherein the long side of each rectangular tube is parallel to the panel and the short side is perpendicular to the panel during stacking.
The selection of the panel size is determined by the core length after the rectangular tubes are stacked and the length of a single rectangular tube, one side of the panel is equal to the integral side length after the cores are stacked, the other side of the panel is equal to the side length vertical to the rectangular section, and after the core and the front and rear panels are fixed, the novel honeycomb sandwich structure with the negative Poisson ratio effect under pressure as shown in figure 3 can be obtained.
The metal front panel 1 and the metal rear panel 3 are made of the same or different metals, and the metals are aluminum alloy or stainless steel and the like; the rectangular pipes 2 are made of the same metal, and the metal is aluminum alloy or stainless steel.
The first preparation method is to directly obtain the sandwich structure by extrusion forming of aluminum, and the second preparation method is specifically completed according to the following steps:
the method comprises the following steps: selecting a metal rectangular pipe and a metal panel with proper sizes;
step two: cleaning, degreasing and rust removing treatment are carried out on the metal front panel 1, the metal rear panel 3 and the rectangular pipe core 2;
step three: gaps with the same size are reserved between adjacent unit cells of each layer of core, the middle points of the gaps are aligned with the middle points of the long edges of the sections of the rectangular tubes of the adjacent layers, and the integral core is obtained by welding;
step four: after the core is integrally welded with the front and rear panels, the novel honeycomb sandwich structure with the negative Poisson's ratio effect under pressure as shown in figure 3 can be obtained.
In summary, the following steps: the invention belongs to the field of sandwich structure preparation, in particular to a rectangular tube single-cell absolute poisson ratio honeycomb sandwich structure and a preparation method thereof, and aims to provide a rectangular tube core which is formed by stacking rectangular tubes serving as single-cell combinations and a rectangular tube core forming the rectangular tube single-cell absolute poisson ratio honeycomb sandwich structure and the preparation method thereof. A rectangular tube unit cell absolute Poisson ratio honeycomb sandwich structure: the pipe is prepared by welding a metal front panel, a rectangular pipe core and a metal rear panel. Under tensile load, the structure core shrinks inwards and shows the property of positive Poisson ratio; upon compressive loading, the core still contracts inwardly, exhibiting negative poisson's ratio properties. Compared with the traditional honeycomb structure, the negative poisson ratio structure has better mechanical and physical properties, such as energy absorption property, shear modulus, impact resistance and the like. And the structure is simple and practical in preparation process, and easy to realize flow production.
Claims (3)
1. A rectangular tube unit cell absolute Poisson ratio honeycomb sandwich structure: constitute by metal front panel, rectangular pipe core, metal rear panel, its characterized in that: the rectangular tube core is clamped between the metal front panel and the metal rear panel; the rectangular tube core is formed by stacking rectangular tube unit cells, gaps with the same size are reserved between adjacent rectangular tube unit cells in the same layer, the middle points of the gaps are aligned with the middle points of the long sides of the cross sections of the adjacent rectangular tube unit cells, the long sides of the cross sections of the rectangular tube unit cells are parallel to the panel, and the short sides of the cross sections are perpendicular to the panel.
2. The rectangular tube unit cell Poisson's ratio honeycomb sandwich structure of claim 1, wherein: the metal front panel is formed by aluminum alloy or stainless steel, and the metal rear panel is formed by aluminum alloy or stainless steel; each rectangular tube unit cell is formed by the same metal, and the metal is aluminum alloy or stainless steel.
3. The method for preparing the rectangular ductus unit cell Poisson's ratio honeycomb sandwich structure of claim 1, comprising the following steps:
the method comprises the following steps: selecting a metal rectangular tube unit cell, a metal front panel and a metal rear panel;
step two: cleaning the metal front panel, the metal rear panel and the metal rectangular pipe unit cell, and removing oil stains and rust stains;
step three: manufacturing an integral rectangular tube core by a welding process;
step four: and welding the integral rectangular tube core with the metal front panel and the metal rear panel respectively to obtain the rectangular tube single-cell absolute Poisson's ratio honeycomb sandwich structure.
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| CN110435256B true CN110435256B (en) | 2021-03-30 |
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| CN113085216A (en) * | 2021-03-24 | 2021-07-09 | 哈尔滨工程大学 | Fiber tube periodic positive and negative Poisson's ratio sandwich structure and preparation method thereof |
Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106827713A (en) * | 2017-01-20 | 2017-06-13 | 西安交通大学 | A kind of ripple square tube core body sandwich and preparation method thereof |
| CN108005302A (en) * | 2016-10-31 | 2018-05-08 | 张跃 | A kind of flange core |
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Patent Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108005302A (en) * | 2016-10-31 | 2018-05-08 | 张跃 | A kind of flange core |
| CN106827713A (en) * | 2017-01-20 | 2017-06-13 | 西安交通大学 | A kind of ripple square tube core body sandwich and preparation method thereof |
Non-Patent Citations (1)
| Title |
|---|
| 纤维铺层顺序对VARI工艺制备的泡沫填充GFRP矩形管轴向压溃性能影响的实验和数值模拟;王继辉;《玻璃钢/复合材料》;20180930;第87-97页 * |
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Inventor after: Yang Peiyan Inventor after: Yang Lihong Inventor after: Qu Jia Inventor after: Lin Zhuang Inventor after: Wu Linzhi Inventor after: Xiao Jun Inventor after: Pang Yuezhao Inventor after: Yao Houqi Inventor after: Tong Yao Inventor after: Ju Dianwei Inventor before: Yang Peiyan Inventor before: Qu Jia Inventor before: Xiao Jun Inventor before: Pang Yuezhao Inventor before: Yao Houqi Inventor before: Wu Linzhi Inventor before: Tong Yao Inventor before: Ju Dianwei Inventor before: Yang Lihong |
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Effective date of registration: 20211103 Address after: 150028 Building 2, innovation and entrepreneurship Plaza, science and technology innovation city, high tech Industrial Development Zone, Harbin, Heilongjiang Province (No. 719, science and technology first street) a205-14 Patentee after: Harbin Deye Hangyu New Material Technology Co.,Ltd. Address before: 150001 Intellectual Property Office, Harbin Engineering University science and technology office, 145 Nantong Avenue, Nangang District, Harbin, Heilongjiang Patentee before: HARBIN ENGINEERING University |