CN110497656A - A kind of core Cellular structure, porous structure core and sandwich endergonic structure - Google Patents

A kind of core Cellular structure, porous structure core and sandwich endergonic structure Download PDF

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CN110497656A
CN110497656A CN201910689143.0A CN201910689143A CN110497656A CN 110497656 A CN110497656 A CN 110497656A CN 201910689143 A CN201910689143 A CN 201910689143A CN 110497656 A CN110497656 A CN 110497656A
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layer
core
interlayer
porous
internal layer
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CN110497656B (en
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尹汉锋
杨越
郑贤君
文桂林
刘志鹏
谭丁文
马帅
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Hunan University
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    • BPERFORMING OPERATIONS; TRANSPORTING
    • B32LAYERED PRODUCTS
    • B32BLAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
    • B32B1/00Layered products having a general shape other than plane
    • BPERFORMING OPERATIONS; TRANSPORTING
    • B32LAYERED PRODUCTS
    • B32BLAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
    • B32B15/00Layered products comprising a layer of metal
    • B32B15/04Layered products comprising a layer of metal comprising metal as the main or only constituent of a layer, which is next to another layer of the same or of a different material
    • BPERFORMING OPERATIONS; TRANSPORTING
    • B32LAYERED PRODUCTS
    • B32BLAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
    • B32B15/00Layered products comprising a layer of metal
    • B32B15/18Layered products comprising a layer of metal comprising iron or steel
    • BPERFORMING OPERATIONS; TRANSPORTING
    • B32LAYERED PRODUCTS
    • B32BLAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
    • B32B15/00Layered products comprising a layer of metal
    • B32B15/20Layered products comprising a layer of metal comprising aluminium or copper
    • BPERFORMING OPERATIONS; TRANSPORTING
    • B32LAYERED PRODUCTS
    • B32BLAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
    • B32B3/00Layered 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
    • B32B3/10Layered 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
    • B32B3/12Layered 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
    • BPERFORMING OPERATIONS; TRANSPORTING
    • B32LAYERED PRODUCTS
    • B32BLAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
    • B32B3/00Layered 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
    • B32B3/26Layered 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 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
    • B32B3/266Layered 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 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 characterised by an apertured layer, the apertures going through the whole thickness of the layer, e.g. expanded metal, perforated layer, slit layer regular cells B32B3/12
    • BPERFORMING OPERATIONS; TRANSPORTING
    • B32LAYERED PRODUCTS
    • B32BLAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
    • B32B2250/00Layers arrangement
    • B32B2250/40Symmetrical or sandwich layers, e.g. ABA, ABCBA, ABCCBA
    • BPERFORMING OPERATIONS; TRANSPORTING
    • B32LAYERED PRODUCTS
    • B32BLAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
    • B32B2307/00Properties of the layers or laminate
    • B32B2307/10Properties of the layers or laminate having particular acoustical properties
    • B32B2307/102Insulating
    • BPERFORMING OPERATIONS; TRANSPORTING
    • B32LAYERED PRODUCTS
    • B32BLAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
    • B32B2307/00Properties of the layers or laminate
    • B32B2307/30Properties of the layers or laminate having particular thermal properties
    • B32B2307/304Insulating
    • BPERFORMING OPERATIONS; TRANSPORTING
    • B32LAYERED PRODUCTS
    • B32BLAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
    • B32B2307/00Properties of the layers or laminate
    • B32B2307/50Properties of the layers or laminate having particular mechanical properties
    • BPERFORMING OPERATIONS; TRANSPORTING
    • B32LAYERED PRODUCTS
    • B32BLAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
    • B32B2307/00Properties of the layers or laminate
    • B32B2307/50Properties of the layers or laminate having particular mechanical properties
    • B32B2307/558Impact strength, toughness
    • BPERFORMING OPERATIONS; TRANSPORTING
    • B32LAYERED PRODUCTS
    • B32BLAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
    • B32B2307/00Properties of the layers or laminate
    • B32B2307/50Properties of the layers or laminate having particular mechanical properties
    • B32B2307/56Damping, energy absorption
    • BPERFORMING OPERATIONS; TRANSPORTING
    • B32LAYERED PRODUCTS
    • B32BLAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
    • B32B2605/00Vehicles
    • B32B2605/08Cars

Abstract

The invention discloses a kind of core Cellular structure, including outer layer and internal layer, outer layer and internal layer are three period minimal surfaces, form cavity between outer layer and internal layer, the connecting plate of connection outer layer and internal layer is equipped in cavity;It is all provided with the upper opening being oppositely arranged extended outside oriented cavity and under shed on outer layer and internal layer, the side of outer layer and internal layer is provided with multiple side openings extended to outside cavity.The invention also discloses a kind of porous structure core, including core Cellular structure as described above, by corresponding open butt joint between adjacent core Cellular structure, outer layer and internal layer are respectively formed continuous curved surface in multiple core Cellular structures.The invention also discloses a kind of sandwich endergonic structures, including the first interlayer, the second interlayer and porous structure core as described above, porous structure core to be located between the first interlayer and the second interlayer.Core Cellular structure, porous structure core and sandwich endergonic structure of the invention all has the advantages that structure is simple, energy absorbing efficiency is high.

Description

A kind of core Cellular structure, porous structure core and sandwich endergonic structure
Technical field
The invention mainly relates to core body technique field, a kind of core Cellular structure, porous structure core and sandwich are refered in particular to Endergonic structure.
Background technique
Nature is always the inspiration source that the mankind obtain innovation and creation, and unique profile possessed by organism, inside are micro- The characteristics such as structure and the principle of optimality are seen, new mentality of designing and bionic theory reference are provided for engineering technology research staff.It is porous Material is widely present in nature, such as timber, honeycomb (as shown in Figure 1), animal skeleton and sponge.Copy such biology knot Some structures haveing excellent performance of structure design, such as honeycomb aluminum sandwich structure, relative density is small, specific strength and specific stiffness Greatly, energy absorbing efficiency is high, and good impact resistance, damping, buffering, heat-insulating sound-insulating etc. are had excellent performance, and is ideal lightweight structural material, and one The directly attention all by academia and engineering circles, especially in aerospace flight vehicle, bullet train, automobile and high-speed ship Etc. high-tech areas be used widely.
Domestic and international common sandwich structure at present, such as traditional hexagonal honeycomb sandwich structure, number of patent application are The class honeycomb sandwich structure of CN103559343A, number of patent application are the bulletproof sandwich plate knot in CN202742715U Structure etc., these sandwich structures are mainly formed by metal or composite material interlayer and high porosity metal core composition, wherein Internal core influences sandwich structure performance maximum.
With the development of science and technology, the high-tech areas such as automobile, space flight, navigation get over the lightweight of structure and high performance requirements Come higher, common sandwich structure both at home and abroad above-mentioned at present resists impact, damping, buffering, energy in high velocity impact It absorbs and there is obvious deficiency.Therefore, a kind of light weight is developed, energy-absorbing effect is more preferable, and impact resistance is stronger, and mechanical property is more excellent Different sandwich sandwich structure has become demand more urgent in current every field.
Summary of the invention
The technical problem to be solved in the present invention is that, for technical problem of the existing technology, the present invention provides one Kind structure is simple, energy absorbing efficiency is high core Cellular structure, porous structure core and sandwich endergonic structure.
In order to solve the above technical problems, technical solution proposed by the present invention are as follows:
A kind of core Cellular structure, including outer layer and internal layer, the outer layer and internal layer are three period minimal surfaces, described Cavity is formed between outer layer and internal layer, and the connecting plate of connection outer layer and internal layer is equipped in the cavity;On the outer layer and internal layer It is all provided with the upper opening extended outside oriented cavity and under shed, the upper opening is oppositely arranged under shed, the outer layer and internal layer Side be provided with multiple side openings extended to outside cavity.
As a further improvement of the above technical scheme:
The outer layer and internal layer are the p-type thin slice curved surface in three period minimal surfaces, corresponding implicit function are as follows: Φp(r) =-[cos (X)+cos (Y)+cos (Z)]=C, wherein X=2 π x, Y=2 π y, Z=2 π z, C=0, wherein x, y, z is p-type thin slice The coordinate of curved surface each point in a coordinate system.
It is in certain scaling v between the internal layer and outer layer.
The quantity of the side opening is four, is evenly distributed on the side of outer layer and internal layer.
The invention also discloses a kind of porous structure core, including core Cellular structure as described above, adjacent core born of the same parents By corresponding open butt joint between meta structure, outer layer and internal layer are respectively formed continuous curved surface in multiple core Cellular structures.
The present invention further discloses a kind of sandwich endergonic structure, including the first interlayer, the second interlayer and upper described Porous structure core, the porous structure core are located between first interlayer and the second interlayer.
As a further improvement of the above technical scheme:
The porous structure core is pasted between first interlayer and the second interlayer.
First interlayer and the second interlayer are surface plate or curved slab or tubing.
Lightening hole is provided on first interlayer and the second interlayer.
First interlayer and the second interlayer are folder made of metal aluminum or aluminum alloy or stainless steel or copper or galvanized iron sheet Layer.
Compared with the prior art, the advantages of the present invention are as follows:
Core Cellular structure of the invention, structure is simple, lower quality is achieved with higher intensity and shock resistance etc. Mechanical property, in addition the p-type thin slice curved surface of this three periods minimal surface is also equipped with smooth continuous pore structure, and this kind of hole Structure is easily controllable, convenient for obtaining the best porosity under specific operation.
Porous structure core of the invention, light weight, specific strength height, energy absorbing efficiency height, good heat preservation performance, heat-proof quality be good, Sound insulation value is preferable, comprehensive performance is stronger;Compared with legacy cellular structure, in mechanical property, mechanical strength, energy absorbing efficiency resists It is significantly improved, has compared with legacy cellular structure in engineer application field huge excellent in the various performances such as impact Gesture.
Sandwich endergonic structure of the invention is high using porous structure core, energy absorbing efficiency;Heat insulating ability, heat-proof quality, every Sound performance is more preferable, meets the demand of the hi-tech industries such as space flight, navigation.
Detailed description of the invention
Fig. 1 is conventional aluminum honeycomb figure.
Fig. 2 is the structural schematic diagram of core Cellular structure in the present invention.
Fig. 3 is the partial cross structure chart of core Cellular structure in the present invention.
Fig. 4 is the structural schematic diagram of endergonic structure in example 1 in the present invention.
Fig. 5 is the structural schematic diagram of endergonic structure in example 2 in the present invention.
Fig. 6 is the structural schematic diagram of endergonic structure in the third embodiment in the present invention.
Fig. 7 is the partial view of Fig. 6.
Fig. 8 is the power displacement curve comparison diagram obtained after three kinds of configurations compress.
Figure label indicates: 1, the first interlayer;2, the second interlayer;3, porous structure core;31, core Cellular structure; 311, outer layer;312, internal layer;313, connecting plate;314, upper opening;315, under shed;316, side opening;4, lightening hole.
Specific embodiment
Below in conjunction with Figure of description and specific embodiment, the invention will be further described.
Embodiment one:
As shown in Figures 2 and 3, the core Cellular structure of the present embodiment, including outer layer 311 and internal layer 312,311 He of outer layer Internal layer 312 be three period minimal surfaces (three period minimal surfaces be to three-dimensional space extend average curvature be zero curved surface, Abbreviation TPMS, wherein three periods referred to the dimension extended to peripheral space), cavity is formed between outer layer 311 and internal layer 312, The connecting plate 313 of connection outer layer 311 and internal layer 312 is equipped in cavity (such as floor plays connection and supporting role);311 He of outer layer The upper opening 314 extended outside oriented cavity and under shed 315 are all provided on internal layer 312, upper opening 314 is opposite under shed 315 to be set It sets, there are four the side opening 316 extended to outside cavity, four side openings 316 are uniform for the side setting of outer layer 311 and internal layer 312 It is distributed in the side of outer layer 311 and internal layer 312.As shown in Figures 2 and 3, two side openings 316 are arranged along the x axis, two sides Opening 316 arranges that upper opening 314 and under shed 315 are arranged along Z-direction along the y axis, certainly, in other embodiments, In Multiple openings arranged side by side are arranged in the one end (such as at upper opening 314) in one direction.In addition, outer layer 311 and internal layer 312 are three weeks P-type thin slice curved surface in phase minimal surface, corresponding implicit function are as follows: Φp(r)=- [cos (X)+cos (Y)+cos (Z)]=C, Wherein X=2 π x, Y=2 π y, Z=2 π z, C=0, wherein x, y, z is the coordinate of p-type thin slice curved surface each point in a coordinate system, and c is Constant.Wherein p-type thin slice curved surface is one kind of three period minimal surfaces, is provided with periodicity on three directions of three-dimensional space And can infinite expanding minimal surface.The p-type thin slice formed using the above-mentioned xyz combinations of values for meeting implicit function expression formula is bent Face, the mechanical properties such as intensity light-weight and with higher and shock resistance, in addition this p-type thin slice curved surface is also equipped with smooth continuous Pore structure (i.e. cavity), and this kind of pore structure is easily controllable, convenient for obtaining the best porosity under specific operation.
It is adjacent the invention also discloses a kind of porous structure core, including multiple core Cellular structures 31 as described above By corresponding open butt joint between core Cellular structure 31, outer layer 311 and the equal shape of internal layer 312 in multiple core Cellular structures 31 At continuous curved surface.The porous core knot of level is can be obtained into along tri- direction infinite copies of X, Y, Z in core Cellular structure 31 Structure.Using above-mentioned porous structure core 3, light weight, specific strength height, energy absorbing efficiency height, good heat preservation performance, heat-proof quality be good, sound insulation Better performances, comprehensive performance are stronger;Compared with legacy cellular structure, in mechanical property, mechanical strength, energy absorbing efficiency, shock resistance Property etc. be significantly improved in various performances, there is compared with legacy cellular structure big advantage in engineer application field.
As shown in figure 4, the present invention further discloses a kind of sandwich endergonic structure, including the first interlayer 1, the second interlayer 2 and porous structure core 3 as described above, porous structure core 3 be located between the first interlayer 1 and the second interlayer 2.Specifically Ground, porous structure core 3 are pasted between the first interlayer 1 and the second interlayer 2.Wherein the first interlayer 1 and the second interlayer 2 are flat Panel, as shown in figure 4, convenient for being applied to building field ceiling etc..Certainly, in other fields in application, in order to reduce Its own weight can open up lightening hole 4 on the first interlayer 1 and the second interlayer 2.Wherein the first interlayer 1 and the second interlayer 2 are Interlayer made of metal aluminum or aluminum alloy or stainless steel or copper or galvanized iron sheet can be selected according to the specific requirements of application scenarios It selects.
Fig. 8 is to traditional aluminum honeycomb structure (as shown in Figure 1), aluminum foam, the double-deck curved surface porous structure (in the present invention Sandwich endergonic structure) compression after obtain be compressed axially force-displacement curve, in figure abscissa be displacement, unit mm, indulge sit It is designated as axial compressive force, unit kN.It is compressed axially force-displacement curve and simulation calculation is carried out by finite element software LS-DYNA It obtains.The emulation experiment of the double-deck curved surface porous structure is designed, cell length is all 3.5mm, and material selection is magnesium alloy material Material;Legacy cellular constructed of aluminium is as shown in Figure 1, side length D is 15mm, and inclination angle theta is 30 °, and material is aluminium;Traditional material aluminum foam, it is close Degree is 0.35kg/m3.The height of three kinds of configurations is 70mm, and conquassation speed is 15m/s, and experimental result is as follows:
Aluminum foam, aluminum honeycomb and the double-deck curved surface porous structure are compared, in the case where phase homogenous quantities, by identical speed Collision is crushed after same distance, and the double-deck curved surface porous structure improves 59.13% than the ratio energy-absorbing of aluminum foam, the double-deck curved surface Porous structure improves 95.57% than the ratio energy-absorbing of legacy cellular structure.In general, the double-deck curved surface porous structure and traditional material Material (such as aluminum foam with aluminum honeycomb) is compared, and energy-absorbing effect is significantly increased, and shows the double-deck curved surface porous structure core sandwich plate ratio There are better energy absorption characteristics by the core sandwich plate that traditional energy-absorbing material forms.
Embodiment two:
The difference of the present embodiment and embodiment one is only that the concrete shape of the first interlayer 1 and the second interlayer 2, such as Fig. 5 institute Show, in the present embodiment, the first interlayer 1 and the second interlayer 2 are all made of curved slab, convenient for being suitable for the fields such as automobile, space flight.When So, when overall structure meets energy absorption performance, by increasing lightening hole 4 and reducing each thickness of interlayer, effectively mitigate overall structure Weight.Other not described contents are the same as example 1, and details are not described herein.
Embodiment three:
The difference of the present embodiment and embodiment one is only that the concrete shape of the first interlayer 1 and the second interlayer 2, as Fig. 6 with Shown in Fig. 7, in the present embodiment, the first interlayer 1 and the second interlayer 2 are all made of round tube, porous structure core 3 be pasted on outer tube with Between inner tube.Other not described contents are the same as example 1, and details are not described herein.
In conclusion porous structure core (the i.e. double-deck curved surface porous structure) of the invention makes sandwich surface plate, three The energy absorbing efficiency of the sandwich structures such as Mingzhi's curved slab and sandwich tubing is higher, and heat insulating ability, heat-proof quality, sound insulation value is more Good, multifunctional comprehensive property is stronger, can meet the needs of hi-tech industries such as space flight, navigation.Certainly, such porous structure core 3 can be applied not only in sandwich plate and sandwich tubing, be equally applicable in all kinds of pipes as filler.
The above is only the preferred embodiment of the present invention, protection scope of the present invention is not limited merely to above-described embodiment, All technical solutions belonged under thinking of the present invention all belong to the scope of protection of the present invention.It should be pointed out that for the art For those of ordinary skill, several improvements and modifications without departing from the principles of the present invention should be regarded as protection of the invention Range.

Claims (10)

1. a kind of core Cellular structure, which is characterized in that including outer layer (311) and internal layer (312), the outer layer (311) and interior Layer (312) is three period minimal surfaces, forms cavity between the outer layer (311) and internal layer (312), is equipped in the cavity Connect the connecting plate (313) of outer layer (311) and internal layer (312);Oriented cavity is all provided on the outer layer (311) and internal layer (312) The upper opening (314) and under shed (315) of outer extension, the upper opening (314) are oppositely arranged under shed (315), described outer The side of layer (311) and internal layer (312) is provided with multiple side openings (316) extended to outside cavity.
2. core Cellular structure according to claim 1, which is characterized in that the outer layer (311) and internal layer (312) are P-type thin slice curved surface in three period minimal surfaces, corresponding implicit function are as follows:
Φp(r)=- [cos (X)+cos (Y)+cos (Z)]=C, wherein X=2 π x, Y=2 π y, Z=2 π z, C=0, wherein x, y, z It is the coordinate of p-type thin slice curved surface each point in a coordinate system.
3. core Cellular structure according to claim 1 or 2, which is characterized in that the internal layer (312) and outer layer (311) Between be in certain scaling v.
4. core Cellular structure according to claim 1 or 2, which is characterized in that the quantity of the side opening (316) is four It is a, it is evenly distributed on the side of outer layer (311) and internal layer (312).
5. a kind of porous structure core, which is characterized in that including multiple cores as described in any one of Claims 1-4 Cellular structure (31) passes through corresponding open butt joint, multiple core Cellular structures (31) between adjacent core Cellular structure (31) Middle outer layer (311) and internal layer (312) are respectively formed continuous curved surface.
6. a kind of sandwich endergonic structure, which is characterized in that including the first interlayer (1), the second interlayer (2) and such as claim 5 The porous structure core (3), the porous structure core (3) be located in first interlayer (1) and the second interlayer (2) it Between.
7. sandwich endergonic structure according to claim 6, which is characterized in that the porous structure core (3) is pasted on Between first interlayer (1) and the second interlayer (2).
8. sandwich endergonic structure according to claim 6 or 7, which is characterized in that first interlayer (1) and the second folder Layer (2) is surface plate or curved slab or tubing.
9. sandwich endergonic structure according to claim 8, which is characterized in that first interlayer (1) and the second interlayer (2) lightening hole (4) are provided on.
10. sandwich endergonic structure according to claim 6 or 7, which is characterized in that first interlayer (1) and second Interlayer (2) is interlayer made of metal aluminum or aluminum alloy or stainless steel or copper or galvanized iron sheet.
CN201910689143.0A 2019-07-29 2019-07-29 Core cell structure, porous structure core and sandwich energy-absorbing structure Active CN110497656B (en)

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