CN106427084A - Polygonal lattice type grille-column structure sandwich panel - Google Patents
Polygonal lattice type grille-column structure sandwich panel Download PDFInfo
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- CN106427084A CN106427084A CN201610903458.7A CN201610903458A CN106427084A CN 106427084 A CN106427084 A CN 106427084A CN 201610903458 A CN201610903458 A CN 201610903458A CN 106427084 A CN106427084 A CN 106427084A
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- grid
- polygon
- rod structure
- sandwich plate
- lattice
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Classifications
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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 form; Layered products having particular features of form
- B32B3/10—Layered products comprising a layer with external or internal discontinuities or unevennesses, or a layer of non-planar form; Layered products having particular features of form characterised by a discontinuous layer, i.e. formed of separate pieces of material
- B32B3/12—Layered products comprising a layer with external or internal discontinuities or unevennesses, or a layer of non-planar form; Layered products having particular features of form characterised by a discontinuous layer, i.e. formed of separate pieces of material characterised by a layer of regularly- arranged cells, e.g. a honeycomb structure
-
- 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
- B32B33/00—Layered products characterised by particular properties or particular surface features, e.g. particular surface coatings; Layered products designed for particular purposes not covered by another single class
-
- 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
- B32B2307/546—Flexural strength; Flexion stiffness
Abstract
The invention discloses a polygonal lattice type grille-column structure sandwich panel. The polygonal lattice type grille-column structure sandwich panel comprises an upper panel, a lower panel and polygonal lattice type grille-column structures, wherein the polygonal lattice type grille-column structures are arranged at the middle part; each polygonal lattice type grille-column structure comprises grille walls and reinforcing columns arranged at intersection positions of the grille walls. The polygonal lattice type grille-column structure sandwich panel is characterized in that the grille walls are of lattice structures; each grille wall comprises a framework and hollow lattices located in the framework, and the framework is formed by an upper frame, a lower frame and a connecting piece located between the upper frame and the lower frame; the diameter or the side length of the reinforcing columns is greater than the thickness of the grille walls. According to the polygonal lattice type grille-column structure sandwich panel disclosed by the invention, the reinforcing columns of the polygonal lattice type grille-column structure sandwich panel just can be used for bearing vertical load, the lattice type grille walls noly needs to bear bending moment action, the reinforcing columns and the lattice type grille walls are in clear division of labor, material performance can be fully expressed, and the material utilization rate is higher; on the basis, by arranging reinforcing ribs on the upper ends and the lower ends of the lattice type grille walls, the compression resistance, the bending resistance and the overall performance of the polygonal lattice type grille-column structure sandwich panel are further enhanced.
Description
Technical field
The present invention relates to a kind of sandwich plate, it is more particularly, to polygon lattice grid-rod structure formula interlayer in the middle of one kind
Plate.
Background technology
Have become as today of product primary evaluation index in energy-conserving and environment-protective, the research of novel light structure is subject to people's
Pay attention to.Interlayer battenboard becomes Aeronautics and Astronautics, railway, automobile, building with the features such as it is lightweight, rigidity is big, designability is strong
On one of indispensable structure in field.Because cost of manufacture is higher at the beginning, from the fifties in last century, it is mainly used in aviation boat
Its field.Afterwards with scientific and technological progress, the improvement of process is gradually applied to other industrial circles.The material making sandwich plate has
Papery, composite, metal etc..The sandwich layer that the feature of sandwich plate high-strength light is formed mainly due to its middle polygon grid
Structure.But in existing sandwich plate core structure, mostly grid wall is connected with each other and forms, also have is arranged in grid wall junction
Pillar, but itself be not optimization polygon grid Sandwich Plates, due to there is three below shortcoming：1) work as sandwich plate
Bear perpendicular to the load of panel when, the cell structure of sandwich layer is under pressured state, the key of the junction between grid wall
Region is also easy to produce torsion under vertical load, thus leading to grid wall the outer bending deformation of the plane of one half-wave to occur, to grid
The comprcssive strength of structure has very big adverse effect；2) when sandwich plate bears perpendicular to the load of panel, in core structure
Be primarily subjected to vertical force effect is grid wall intersection.This is because itself is very thin due to grid wall itself, is also easy to produce plane
Outer bending deformation, the vertical force effect that therefore can bear is very limited；3) sandwich plate, under Moment, on the one hand passes through upper
The countertorque that lower panel provides carrys out resist torque effect, on the other hand carrys out resist torque also by the grid wall in core structure and makees
With.But according to structure bending resistance principle, grid wall is respectively at pressurized and tension shape along the material of short transverse upper and lower ends
State, its internal stress is also maximum.And grid wall middle part stress very little, it is impossible to make full use of material, can increase folder again
Laminate weight.
Content of the invention
The technical problem to be solved is the deficiency existing for above-mentioned prior art, and provides a kind of quality
Gently, stock utilization is high, can play a kind of polygon lattice grid-rod structure formula sandwich plate of material maximum performance.
For solving above-mentioned technical problem, the technical solution used in the present invention is：
A kind of polygon lattice grid-rod structure formula sandwich plate, including the polygon of top panel, lower panel and centre
Lattice grid-rod structure, described polygon lattice grid-rod structure includes grid wall and is arranged on grid wall intersection
Reinforcing prop it is characterised in that：Described grid wall is lattice, and described grid wall includes framework and the sky being located in framework
Lattice, described framework is made up of upper side frame, lower frame and the connector being located between upper side frame and lower frame, described reinforcing prop
Diameter or the length of side are more than grid wall thickness.
The grid wall of polygon lattice grid-rod structure sandwich plate of the present invention is lattice, and the advantage of this structure is,
Give full play to the feature that lattice grid wall is lightweight, bending rigidity is good, give full play to the anti-pressure ability of reinforcing prop, up and down again
Reinforcement within frame can further improve this sandwich plate intensity.
Described upper side frame and following inframe are provided with reinforcement.
Described reinforcement can be the how arched prestressing force reinforcement being formed by pre- tensioning.
On the basis of lattice grid wall, by arranging reinforcement in lattice grid pars intramuralis, and can be according to reality
Engineering applies prestressing force to form how arched prestressing force reinforcement to reinforcement, improves the pressure resistance of whole sandwich plate further
Degree, bending strength and globality.
Described space is circular spaces or polygon space.
Described polygon space is triangle space or tetragon space.
The polygon grid of described polygon lattice grid-rod structure is triangular lattice, tetragon grid or six sides
Shape grid etc..
Described reinforcing prop is polygon post or cylinder.
Described reinforcing prop is solid or hollow.
Described top panel and/or lower panel are surface plate or curved slab.
Different from the core structure that polygon grid in conventional interlayer plate connects formation, although the present invention is also sandwich plate,
But its core structure is actually mainly by reinforcing prop and lattice grid wall constitutes it is often more important that its stress model creates
Fundamental change.The three major defect analyses being existed from above-mentioned conventional interlayer plate, when conventional interlayer plate is subject to vertical lotus
When load or Moment, its core structure can not give full play to resistance to compression or anti-bending strength corresponding to material.And the present invention
The mechanical model of sandwich plate is：Reinforcing prop only undertakes vertical load, and lattice grid wall is solely subjected to Moment, and each the division of labor is bright
Really, material property can be given full play to, stock utilization is higher again.On this basis, then by lattice grid wall upper and lower two
End setting reinforcement, further enhances resistance to compression, bending resistance and the overall performance of sandwich plate.
Brief description
Fig. 1 is polygon lattice grid of the present invention-rod structure sandwich plate (tetragon) example schematic, and reinforcing prop is real
Heart cylinder.
Fig. 2 is present configuration general illustration.
Fig. 3 is polygon lattice grid of the present invention-rod structure formula sandwich plate (triangle) example schematic, and reinforcing prop is
Hollow cylinder.
Fig. 4 is the force analysis figure that polygon lattice grid of the present invention-rod structure formula sandwich plate resistance to compression strengthens principle.
Fig. 5 is conventional grates sandwich plate core structure resistance to compression force analysis figure.
Fig. 6 is the force analysis that polygon lattice grid of the present invention-rod structure formula sandwich plate bending strength strengthens principle
Figure.
Fig. 7 is conventional grates sandwich plate core structure bending resistance force analysis figure.
Fig. 8 be polygon lattice grid of the present invention-rod structure formula sandwich plate grid wall structural representation, wherein a by
Two connectors form 3 triangle spaces, and b forms 4 triangle spaces by two connectors, and c forms 8 by 5 connectors
Individual triangle space.
Fig. 9 is the how arched prestressing force reinforcement of polygon lattice grid of the present invention-rod structure formula sandwich plate grid wall
Principle schematic () taking single grid wall as a example.
In figure is numbered：1st, lower panel, 2, polygon lattice grid-rod structure, 3, grid wall, 31, framework, 311, upper ledge
Frame, 312, underframe, 313, connector, 32, space, 4, reinforcing prop, 5, reinforcement, 6, top panel, 7, grid triangular element,
8th, circular hollow post, 9, reinforcement A, 10, reinforcement B, 11, the anchoring piece of reinforcement A, 12, bending arch.
Specific embodiment
Taking tetragon grill unit as a example, this polygon lattice grid-rod structure formula sandwich plate shows the embodiment of the present invention
It is intended to as shown in Figure 1 and Figure 2, including top panel 6, lower panel 1 and polygon lattice grid-rod structure 2.Wherein polygon
Lattice grid-rod structure 2 includes grid wall 3 and reinforcing prop 4, and reinforcing prop 4 is located at the intersection of grid wall 3.Grid wall 3 is lattice
Structure formula, the space 32 including framework 31 and in framework.Framework 31 by upper side frame 311, lower frame 312 and is located at top
Connector 313 between frame and lower frame forms, and the diameter of reinforcing prop 4 or the length of side are more than grid wall 3 thickness.Frame 311 on top
It is provided with reinforcement with lower frame 312.
Separately below the enhancing principle from comprcssive strength, bending strength and double curvature arch prestressing force reinforcement to illustrate polygon
The mechanical property of shape lattice grid-rod structure reinforcement sandwich plate.
The enhancing principle of comprcssive strength：
According to knowable to Stability Analysis of Structures is theoretical, under vertical uniform load q, the opening star section of grid wall intersection is (such as
Shown in Fig. 5) it is also easy to produce torsion, lead to grid wall that the outer bending deformation of plane can occur, the now outer evagination of the plane in the middle part of grid wall
Degree is maximum.Opening star section for making grid wall intersection does not twist, then in grid wall intersection, setting adds
Qiang Zhu.And reinforcing prop is explained as follows to the enhancing principle of comprcssive strength：
Taking Fig. 4 grid wall A as a example, intuitively can disclose very much from geometry contain anti-in strengthening rod structure
The secret of pressure：Positioned at the reinforcing prop of grid wall infall, (Fig. 4 is marked for 90 ° to be not only a quarter reinforcing prop 4 area shared equally
Part) bending rigidity outside the plane of grid wall A has been made to contribute, actually share equally to the reinforcing prop area of grid wall B and D (figure
4, θ2L,θ2RIn place of being marked) also the lateral bending rigidity of grid wall A is made to contribute.Analogize by this, reinforcing prop 4 is to grid wall A
The contribution of resistance moment only have θ4L,θ4RIt is independent, and other θ2L,θ3L, θ2R,θ3RShare with grid wall B and D respectively.Although
Conventional grates structure there is also shared phenomenon (Fig. 5, θ in infall2L,θ3L, θ2R,θ3R), but by comparing Fig. 4 and Fig. 5,
Reinforcing prop 4 structure has following feature：1) area that infall shares substantially increases, target portion of five-pointed star institute in that is, many Fig. 5
Point；2) and this shared part area away from Y-axis, the contribution to the section resistance moment of Y-axis is big, strengthens in therefore bionical cellular board
Rod structure makes grid wall have preferably lateral anti-bending strength.In addition knowable to pull-down component stable theory, in grid wall
After intersection's setting reinforcing prop, in original conventional grates structure, the opening star section of grid wall intersection then switchs to remain silent
Square-section, considerably increases the anti-torsion ability of grid wall intersection, and the grid wall being attached thereto then can undertake bigger
Vertical load.Thus the shared resistance to lateral bending mechanism of explanation reinforcing prop achieves the invigoration effect to conventional grates structure.Due to passing
The grid wall intersection of system polygon grid sandwich plate easily twists, therefore grid wall have to also take on significant component of
Vertical load.But because grid wall itself is also also easy to produce plane outer evagination deformation, the deformation particularly in the middle part of grid wall is maximum, because
This traditional polygon grid sandwich plate entire compression intensity is relatively low.And the present invention adopts lattice or open web type grid wall, no
But alleviate the weight of whole sandwich plate, and the ingenious position eliminating grid wall compressive deformation amount maximum.Therefore can be notable
Reduce the deformity out of plane of grid wall construction.
It should be noted that：Use lattice or open web type grid wall in the present invention, do not play main undertaking
The effect of vertical load.The vertical load of sandwich plate of the present invention mainly to be undertaken by reinforcing prop, and lattice grid wall can undertake
A certain amount of vertical load, but as just a kind of " safety guarantee ", and it is not counted in the Compressive Bearing Capacity of sandwich plate of the present invention.
The enhancing principle of bending strength：
According to structure bending resistance principle, sandwich plate under Moment, the counter-force that on the one hand provided by upper and lower panel
Square carrys out resist torque effect, on the other hand carrys out resist torque effect also by the grid wall in core structure.When sandwich plate panel
When thickness and sandwich layer are highly identical, the afforded Moment of panel is identical.Therefore below by lattice in analysis sandwich layer
The bending resistance principle of grid wall come to illustrate in the present invention adopt lattice grid wall and setting reinforcement the reason.
Fig. 6 is the lattice grid wall of the present invention, and Fig. 7 is conventional interlayer plate core layer cell structure.In moment M0Under effect,
Grid wall upper end is in pressured state, and lower end is in tension state.Now, the material stress of two kinds of situation Under The Grille pars intramuralis divides
Not shown on the right side of Fig. 6 and Fig. 7.Conventional interlayer plate core layer grid wall presents upper and lower ends stress greatly (region of high stress), middle
The feature of stress little (low stress area), as shown in Figure 7.Thus while grid wall middle part is solid construction, but its material is strong
The performance very little that degree plays is so that stock utilization is relatively low.Lattice (or open web type) grid wall is adopted therefore in the present invention, and
Descend two ends setting reinforcement thereon, it is in moment M0The lower stress distribution of effect is as shown in Figure 6：By the not high lattice of stock utilization
Grid wall middle part is changed to lattice, and with reinforcement reinforcement so as to produce extra MReinforcementBending resistance to provide sandwich plate is held
Load power.Whole lattice grid wall only retains the region of high stress, so makes full use of material property, and can produce good bending resistance
Performance and globality.Two middle supports are the intensity in order to improve lattice grid wall compression-side further.And support shape
Formula can have various ways, form including but not limited to shown in Fig. 8.
The enhancing principle of double curvature arch prestressing force reinforcement：
Introduce construction technology first：
1., according to grid wall size, reinforcement 5 is fixed on position as shown in the 9 and 10 of Fig. 9.
2. couple reinforcement A (at label 9 in Fig. 9) carry out pre- tensioning (when engineering of the present invention uses, pre- tensioning reinforcement under
Side), pre- tensioning amount is determined according to requirement of engineering.
3. prestressing force reinforcement is carried out anchor 11 (in Fig. 9) in the both sides of continuous grid wall taking single grid wall as a example.
4. pour or pour into the mixing composite of resin and fiber, wait its coagulation forming, by prestressing force reinforcement A from
Grid wall two ends are cut off so that the prestress application of pre- pretensioning is on grid wall.
Due to being applied with prestressing force in reinforcement A, therefore reinforcement A is in tension state in itself, therefore in reinforcement A week
The grid wall enclosing then is in pressured state.Grid wall in order to balance the pressure that reinforcement A produces, therefore grid wall upper end to it,
I.e. reinforcement B institute position is then in tension state.Therefore whole grid wall presents small arch 12, as Fig. 9 dotted line institute
Show.When vertical uniform load q is on grid wall, external load need to balance the moment of flexure being provided by bending arch first, therefore may be used
Significantly improve bending strength and the breaking resistance of grid wall.
Above-mentioned is that a direction grid wall reinforcement applies prestressed situation.According to Fig. 1, when grill unit is four
During the shape of side, its grid wall has both direction.Reinforcement therefore in both directions applies prestressing force respectively, can form hyperbolic
Arch prestressing force reinforcement.This will greatly improve anti-bending strength and the globality of sandwich plate of the present invention.
Therefore, in sum, the lattice grid wall in the present invention, reinforcing prop and how arched axis prestressing force reinforcement
It is remarkably improved compressive property, anti-bending strength and the globality of sandwich plate of the present invention, finally give folder lightweight, that intensity is high
Laminate.Lattice grid-rod structure sandwich plate of the present invention is applied to transportation, furniture construction or even Aero-Space
Deng wide spectrum.When use environment and mechanical property requirements constant in the case of, the consumption of product and material can be substantially reduced, from
And reach the purpose of environmental protection, favorable influence all can be produced to social economy.
Claims (10)
1. a kind of polygon lattice grid-rod structure sandwich plate, including the polygon lattice of top panel, lower panel and centre
Formula grid-rod structure, described polygon lattice grid-rod structure includes grid wall and is arranged on adding of grid wall intersection
Strong post it is characterised in that：Described grid wall is lattice, and described grid wall includes framework and the space being located in framework, institute
State framework by upper side frame, lower frame and to be located at connector between upper side frame and lower frame and form, described reinforcement column diameter or
The length of side is more than grid wall thickness.
2. polygon lattice grid-rod structure sandwich plate according to claim 1 it is characterised in that：In described top
Frame and following inframe are provided with reinforcement.
3. polygon lattice grid-rod structure sandwich plate according to claim 2 it is characterised in that：Described reinforcement
It is the how arched prestressing force reinforcement being formed by pre- tensioning.
4. the polygon lattice grid-rod structure sandwich plate according to claim 1,2 or 3 it is characterised in that：Described sky
Lattice are circular spaces or polygon space.
5. polygon lattice grid-rod structure sandwich plate according to claim 4 it is characterised in that：Described polygon
Space is triangle space or tetragon space.
6. the polygon lattice grid-rod structure sandwich plate according to claim 1,2 or 3 it is characterised in that：Described many
The polygon grid of side shape lattice grid-rod structure is triangular lattice, tetragon grid or hexagon grid.
7. polygon lattice grid-rod structure sandwich plate according to claim 4 it is characterised in that：Described reinforcing prop
For polygon post or cylinder.
8. polygon lattice grid-rod structure sandwich plate according to claim 7 it is characterised in that：Described reinforcing prop
For solid or hollow.
9. polygon lattice grid according to claim 1-rod structure formula sandwich plate it is characterised in that：Above described
Plate and/or lower panel are surface plate or curved slab.
10. polygon lattice grid-rod structure sandwich plate according to claim 1 it is characterised in that：In sandwich plate
Edge arranges the groove connecting between aforementioned sandwich plate and projection.
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| CN201610903458.7A CN106427084B (en) | 2016-10-17 | 2016-10-17 | A kind of polygon lattice grid-rod structure sandwich plate |
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| CN201610903458.7A CN106427084B (en) | 2016-10-17 | 2016-10-17 | A kind of polygon lattice grid-rod structure sandwich plate |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN114178549A (en) * | 2021-11-08 | 2022-03-15 | 华中科技大学 | Semi-open-pore plate lattice metamaterial and additive manufacturing method thereof |
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| CN114178549B (en) * | 2021-11-08 | 2022-08-05 | 华中科技大学 | Semi-open pore plate lattice metamaterial and additive manufacturing method thereof |
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