CN112406245A - Sandwich structure based on paper folding structure - Google Patents

Sandwich structure based on paper folding structure Download PDF

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Publication number
CN112406245A
CN112406245A CN202011264668.9A CN202011264668A CN112406245A CN 112406245 A CN112406245 A CN 112406245A CN 202011264668 A CN202011264668 A CN 202011264668A CN 112406245 A CN112406245 A CN 112406245A
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China
Prior art keywords
vertexes
vertex
convex
concave
rhombic
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CN202011264668.9A
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Chinese (zh)
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CN112406245B (en
Inventor
喻莹
郭书瑜
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Shantou University
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Shantou University
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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
    • B32B29/00—Layered products comprising a layer of paper or cardboard
    • B32B29/08—Corrugated paper or cardboard
    • 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
    • B32B29/00—Layered products comprising a layer of paper or cardboard
    • B32B29/002—Layered products comprising a layer of paper or cardboard as the main or only constituent of a layer, which is next to another layer of the same or of a different material
    • 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
    • B32B7/12—Interconnection of layers using interposed adhesives or interposed materials with bonding properties
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B64—AIRCRAFT; AVIATION; COSMONAUTICS
    • B64C—AEROPLANES; HELICOPTERS
    • B64C1/00—Fuselages; Constructional features common to fuselages, wings, stabilising surfaces or the like
    • B64C1/22—Other structures integral with fuselages to facilitate loading, e.g. cargo bays, cranes
    • E—FIXED CONSTRUCTIONS
    • E04—BUILDING
    • E04C—STRUCTURAL ELEMENTS; BUILDING MATERIALS
    • E04C2/00—Building elements of relatively thin form for the construction of parts of buildings, e.g. sheet materials, slabs, or panels
    • E04C2/30—Building elements of relatively thin form for the construction of parts of buildings, e.g. sheet materials, slabs, or panels characterised by the shape or structure
    • E04C2/34—Building elements of relatively thin form for the construction of parts of buildings, e.g. sheet materials, slabs, or panels characterised by the shape or structure composed of two or more spaced sheet-like parts
    • 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
    • B32B2250/00—Layers arrangement
    • B32B2250/40—Symmetrical or sandwich layers, e.g. ABA, ABCBA, ABCCBA
    • 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
    • B32B2307/00—Properties of the layers or laminate
    • B32B2307/50—Properties of the layers or laminate having particular mechanical properties
    • B32B2307/558—Impact strength, toughness
    • 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
    • B32B2605/00—Vehicles
    • B32B2605/18—Aircraft
    • 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
    • B32B2607/00—Walls, panels

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  • Engineering & Computer Science (AREA)
  • Architecture (AREA)
  • Mechanical Engineering (AREA)
  • Aviation & Aerospace Engineering (AREA)
  • Civil Engineering (AREA)
  • Structural Engineering (AREA)
  • Laminated Bodies (AREA)
  • Road Paving Structures (AREA)

Abstract

The embodiment of the invention discloses a sandwich structure based on a paper folding structure, which is used for a wall body, a pavement or an aviation structure and comprises a surface plate layer, an adhesive layer and a middle periodic structure, wherein the periodic structure is formed by a plurality of first rhombic units and a plurality of second rhombic units in a Z shape to form a multilayer structure, all vertexes of the first rhombic units are common vertexes, and the second rhombic units are connected with the first rhombic units which are adjacent up, down, left and right; convex vertexes or concave vertexes are arranged on horizontal symmetrical shafts in the second rhombic units adjacent to each other from top to bottom, convex vertexes and concave vertexes are arranged on horizontal symmetrical shafts in the second rhombic units adjacent to each other from left to right, and gaps are formed between folding structures formed by the convex vertexes and the concave vertexes. By adopting the invention, the side surface of the three-dimensional structure formed by the invention can form a communicating pore channel, can be used for placing pipeline lines and is beneficial to discharging water, and the three-dimensional structure has better rigidity and impact resistance, and can simultaneously play roles in avoiding humidity accumulation and preventing collision.

Description

Sandwich structure based on paper folding structure
Technical Field
The invention relates to the field of design of wall body, impact-resistant plate and aircraft cabin wall sandwich structures, in particular to a sandwich structure based on a paper folding structure
Background
The sandwich structure is a composite-constructed plate and shell structure, with both surfaces made of very thin sheet material, and a relatively light sandwich layer sandwiched therebetween. The former is called a panel, and is required to have high strength; the latter, called a sandwich, requires a light weight. Common sandwich structures are used for crash panels, fuselage panels, partitions, road surfaces, etc. The prior sandwich structure comprises a honeycomb sandwich structure and a foam sandwich structure, and the honeycomb sandwich structure has the advantages of light weight, high bending strength and rigidity, strong instability resistance, fatigue aging resistance, sound absorption, sound insulation, good heat insulation performance and the like. But also has the application problem of a main bearing structure, is sensitive to a damp and hot environment, is easily influenced by impact load and is limited to a two-dimensional structure, and has the problems of manufacturing cost, quality and the like. The foam sandwich structure has the following characteristics: in the design of sandwich structures of airplanes, the density of foam materials is higher than that of honeycombs, the shear strength is lower than that of honeycomb materials with the same density, but the foam materials have the advantages of low moisture absorption rate, low manufacturing cost, small processing difficulty and isotropy, and although the sandwich structures have many advantages, the structures still have breakthrough bottlenecks.
Disclosure of Invention
The technical problem to be solved by the embodiments of the present invention is to provide a sandwich structure based on a paper folding structure. The paper folding structure can be combined with the traditional sandwich structure, the formed sandwich structure has the advantages of more plates, high rigidity and good shock resistance, and meanwhile, the effect of avoiding humidity accumulation is achieved.
In order to solve the technical problem, an embodiment of the invention provides a sandwich structure based on a paper folding structure, which is used for a wall body, a pavement or an aviation structure and comprises a surface plate layer, an adhesive layer and a middle periodic structure, wherein the periodic structure is formed by a plurality of first rhombic units and a plurality of second rhombic units in a Z shape to form a multilayer structure, all vertexes of the first rhombic units are common vertexes, and the second rhombic units are connected with the first rhombic units which are adjacent up, down, left and right; convex vertexes or concave vertexes are arranged on horizontal symmetrical shafts in the second rhombic units adjacent to each other from top to bottom, convex vertexes and concave vertexes are arranged on horizontal symmetrical shafts in the second rhombic units adjacent to each other from left to right, and gaps are formed between folding structures formed by the convex vertexes and the concave vertexes.
The first folding ridges are formed between the convex top points and the first top points on the horizontal symmetry axis, the first folding valleys are formed between the convex top points and the second top points on the horizontal symmetry axis, the second folding ridges and the third folding ridges are formed between the convex top points and the second top points on the second diamond-shaped unit, the length of the first folding ridges is smaller than that of the first folding valleys, the two sides of the first top points are folding valleys, the two sides of the second top points are folding ridges, and the forming mode of the concave top points is opposite to that of the convex top points.
And the four edges of the first rhombic unit and the edges of the second rhombic unit on the same line are folded ridges or folded valleys.
Wherein the first vertex is an acute angle.
The first diamond-shaped unit and the second diamond-shaped unit are of the same side length.
Wherein the gap is used for placing a pipe or a line.
The width, the length, the thickness and the size of the side surface communication pores of the middle periodic structure can be adjusted through the design parameters and the unfolding degree of the folded paper.
Preferably, the middle periodic structure is connected with the upper plate surface and the lower plate surface through glue layers.
Preferably, the materials of the surface layer, the adhesive layer and the intermediate periodic structure are determined according to the use scene.
The embodiment of the invention has the following beneficial effects: the side surface of the core layer structure can form a communicating pore channel, can be used for placing pipeline lines, can also facilitate water discharge, and has better rigidity and impact resistance. The composite material can be used for sandwich structures such as aircraft sandwich plates, impact-resistant plates, assembled walls and assembled pavements, and has the functions of avoiding humidity accumulation and resisting impact and the common effect of an outer enclosure structure. And the thickness, the width and the length of the core layer structure and the size of the side surface communication pore can be adjusted by adjusting the parameters of the original paper folding configuration so as to adapt to different application scenes.
Drawings
FIG. 1 is a plan development view of a basic prototype structure of a core structure;
FIG. 2 is an enlarged view of FIG. 1 at A;
FIG. 3 is a plan view of a core structure according to the present invention;
FIG. 4 is an enlarged view of FIG. 3 at B;
FIG. 5 is a schematic three-dimensional structure of a core structure (smaller interconnected porosity);
fig. 6 is a schematic three-dimensional structure of the core structure (larger interconnected pores).
Figure 7 is an exploded view of a sandwich structure according to the present invention.
Detailed Description
In order to make the objects, technical solutions and advantages of the present invention more apparent, the present invention will be described in further detail with reference to the accompanying drawings.
The sandwich structure based on the paper folding structure is used for wall bodies, pavements and aviation structures and comprises a surface plate layer, an adhesive layer and a middle periodic structure, in order to make implementation of the sandwich structure more clear, the embodiment of the invention uses a prototype shown in figure 1 to perform auxiliary explanation on the periodic structure, and the original structure is a Z-shaped multilayer folding structure formed by a plurality of alternating parallelogram structure units. Having a number of convex peaks 3E directed towards the outside of the periodic paper folding structure 3 of the invention and a number of concave peaks 3I directed towards the inside of the paper folding structure 3.
Referring to fig. 2, the convex vertex 3E is formed by converging a first, a second, a third and a fourth convex vertex hems 3E1, 3E2, 3E3 and 33 (the first, the second, the third and the fourth convex vertex hems 3E1, 3E2, 3E3 and 33 are first side a, second side b, third side c and fourth side d), the first, the third and the fourth hems 3E1, 3E3 and 33 are folded edges to be peak folds, the second convex vertex hems 3E2 are valley folds, the included angles between the second convex vertex hems 3E2 and the first and the third convex vertex hems 3E1 and 3E3 are respectively alpha, and the included angles between the fourth convex vertex hems 33 and the first, the third convex vertex hems 3E1 and 3E3 are respectively 180 ° -alpha.
The concave vertex 3I is formed by converging a first concave vertex folding edge 3I1, a second concave vertex folding edge 33, a third concave vertex folding edge 3I3, a fourth concave vertex folding edge 3I4, in the embodiment of the invention, the fourth convex vertex folding edge 33 of the convex vertex 3E is preferably used as the second concave vertex folding edge of the concave vertex 3I, so that the convex vertex 3E and the concave vertex 3I are arranged more densely, the first concave vertex folding edge 3I1, the third concave vertex folding edge 3I3 and the fourth concave vertex folding edge 3I4 are valley folds, the second concave vertex folding edge 33 is peak folds, the included angles between the second concave vertex folding edge 33 and the first concave vertex folding edge 3I1 and the third concave vertex folding edge 3I3 are respectively alpha, and the included angles between the fourth concave vertex folding edge 3I4 and the first concave vertex folding edge 3I1 and the third concave vertex folding edge 3I3 are respectively 180-alpha.
In addition to the structure described in fig. 1 and 2, diamond-shaped cells having a gap structure are formed at the convex apexes 3E and the concave apexes 3I, as shown in fig. 3 and 4.
Two types of rhomboid units are thus formed, one type being units aJ and aK, with no interstitial structure inside, and the other type being units aE and aI, with interstitial structure inside. The two types of rhombic structure units are arranged at intervals.
The middle points on four sides 3E1 at the intersection of the convex vertex 3E, the middle points on 3E3 and two points on 33 and 3E2 are connected to form a second diamond-shaped unit ABCD, the middle points on four sides 3I1 at the intersection of the concave vertex 3I, the middle points on 3I3 and two points on 33 and 3I4 are connected to form an adjacent second diamond-shaped unit FDGH, the convex vertex 3E and the concave vertex 3I are formed in opposite modes, the symmetry axes of the convex vertex 3E and the concave vertex 3I are boundaries of layers in a multilayer folding structure, and the first diamond-shaped unit JADF is positioned in each layer and is shared with the second diamond-shaped unit to connect the upper, lower, left and right adjacent second diamond-shaped units.
There is a gap between the folded structure formed at the convex apex and the concave apex, and specifically, referring to fig. 4, the a-side and C-side midpoints are taken as the vertices a and C of the diamond-shaped cell. The point B and the point D are selected on the side B and the side D, so that the lengths of an AB connecting line, a BC connecting line, a CD connecting line and an AD connecting line are equal to form a rhombic unit ABCD (namely a second rhombic unit) with a gap. The AB connecting line and the BC connecting line are folded peaks, and the CD connecting line and the AD connecting line are folded valleys. The side length of the rhombus is larger than the length of the AE connecting line.
Referring to FIG. 4, the obtuse included angles between the connection lines AB and BC and the second convex vertex folding edge 3E2 are both alpha1The obtuse included angles between the CD and DA connecting lines and the fourth convex vertex folding edge 33Is alpha1The angle between the AB connecting line and the first convex top folded edge 3E1 is 180-alpha1The included angle between the connecting line of the + alpha, BC and the folded edge 3E3 of the third convex vertex is 180-alpha1The included angles between + alpha, AB and AE and between BC and CE are all alpha1The included angles between alpha, AE, CE and ED are all 180-alpha and 180 DEG>α1>90°。
F, D, G, H points are respectively taken on the first, second, third and fourth concave vertex folding edges 3I1, 33, 3I3 and 3I4, and FDGH connecting lines form rhombic cells FDGH (namely adjacent second rhombic cells) with gaps. Point F and Point G are taken at the midpoint of flaps 3I1 and 3I 3. The point D and the point H are selected on the side 33 and the side 3I4, so that the lengths of an FD connecting line, a DG connecting line, a GH connecting line and an HF connecting line are equal to form a rhombic unit FDGH with gaps. The FD connecting line and the DG connecting line are folded valleys, and the FH connecting line and the GH connecting line are folded peaks. The side length of the rhombus is larger than the length of the AE connecting line.
Referring to FIG. 4, the obtuse included angles between the FD and DG connecting lines and the second concave vertex folding edge 33 are both alpha1The obtuse included angles of the HG and HF connecting lines and the fourth concave vertex folding edge 3I4 are both alpha1The included angle between the FD connecting line and the first concave vertex folding edge 3I1 is 180-alpha1The included angle between the + alpha, GD connecting line and the third concave top point folded edge 3I3 is 180-alpha1The included angles between + alpha, FD and FI and the included angles between GD and GI are all alpha1The included angles between alpha, FI, IG and HI are all 180-alpha and 180-alpha>α1>90°。
In this way, the rhombic cells which are alternately arranged are constructed on the basis of the original configuration. The new configuration forms a more multi-layer folding structure after being folded, and the side surface can form a hole and is provided with more energy dissipation plates.
The invention sets the included angles alpha and alpha through the requirement1The desired size of the folding aperture can be achieved by human parameters. Referring to fig. 5, the invention can form a paper folding structure with small side pores. Referring to fig. 6, the invention can also form a paper folding structure with larger side pores.
As shown in FIG. 7, the present invention is composed of upper and lower surface layers 1, 2, upper and lower adhesive layers 4, 5 and a core layer 3 (periodic structure), wherein the surface layer material and the adhesive layer material are determined according to the requirements of the application range.
While the invention has been described in connection with what is presently considered to be the most practical and preferred embodiment, it is to be understood that the invention is not to be limited to the disclosed embodiment, but on the contrary, is intended to cover various modifications and equivalent arrangements included within the spirit and scope of the appended claims.

Claims (6)

1. A sandwich structure based on a paper folding structure is used for a wall body, a pavement or an aviation structure and is characterized by comprising a surface plate layer, an adhesive layer and a middle periodic structure, wherein the periodic structure is formed by a plurality of first rhombic units and a plurality of second rhombic units in a Z shape to form a multilayer structure, all vertexes of the first rhombic units are common vertexes, and the second rhombic units are connected with the first rhombic units which are adjacent up, down, left and right; convex vertexes or concave vertexes are arranged on horizontal symmetrical shafts in the second rhombic units adjacent to each other from top to bottom, convex vertexes and concave vertexes are arranged on horizontal symmetrical shafts in the second rhombic units adjacent to each other from left to right, and gaps are formed between folding structures formed by the convex vertexes and the concave vertexes.
2. The sandwich structure based on the paper folding structure as claimed in claim 1, wherein a first ridge is formed between the convex vertex and a first vertex on the horizontal symmetry axis, a first valley is formed between the convex vertex and a second vertex on the horizontal symmetry axis, a second ridge and a third ridge are formed between the convex vertex and two upper and lower vertices of the second diamond-shaped unit, the length of the first ridge is smaller than that of the first valley, the two sides of the first vertex are valleys, the two sides of the second vertex are ridges, and the concave vertex is formed in a manner opposite to the convex vertex.
3. The origami-based sandwich structure of claim 2, wherein the four sides of the first diamond-shaped element are ridges or valleys with the sides of the second diamond-shaped element in the same line.
4. The origami-based sandwich structure of claim 3, wherein said first apex is an acute angle.
5. The origami-based sandwich structure of claim 4, wherein the first and second diamond-shaped elements are of the same side length.
6. The paper folding structure-based sandwich structure according to any one of claims 1-5, wherein the gap is used for placing pipes or wires.
CN202011264668.9A 2020-11-12 2020-11-12 Sandwich structure based on paper folding structure Active CN112406245B (en)

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Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN113844113A (en) * 2021-09-28 2021-12-28 东南大学 Honeycomb material based on bidirectional stacking three-pump folding

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Publication number Priority date Publication date Assignee Title
US7730925B1 (en) * 2007-05-09 2010-06-08 Pereira Carlos E Collapsable screen and design method
CN111391428A (en) * 2020-03-13 2020-07-10 广州大学 Energy-absorbing core layer, sandwich structure and preparation method
US10833392B1 (en) * 2019-08-21 2020-11-10 The Florida International University Board Of Trustees Reconfigurable foldable and/or origami passive arrays

Patent Citations (3)

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Publication number Priority date Publication date Assignee Title
US7730925B1 (en) * 2007-05-09 2010-06-08 Pereira Carlos E Collapsable screen and design method
US10833392B1 (en) * 2019-08-21 2020-11-10 The Florida International University Board Of Trustees Reconfigurable foldable and/or origami passive arrays
CN111391428A (en) * 2020-03-13 2020-07-10 广州大学 Energy-absorbing core layer, sandwich structure and preparation method

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Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN113844113A (en) * 2021-09-28 2021-12-28 东南大学 Honeycomb material based on bidirectional stacking three-pump folding

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