CN105946298A - Buffer sandwich plate - Google Patents
Buffer sandwich plate Download PDFInfo
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- CN105946298A CN105946298A CN201610424319.6A CN201610424319A CN105946298A CN 105946298 A CN105946298 A CN 105946298A CN 201610424319 A CN201610424319 A CN 201610424319A CN 105946298 A CN105946298 A CN 105946298A
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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
- B32B3/10—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 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 shape; Layered products comprising a layer 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
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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
- B32B3/02—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 features of form at particular places, e.g. in edge regions
- B32B3/08—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 features of form at particular places, e.g. in edge regions characterised by added members at particular parts
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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
- 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
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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
- B32B2307/00—Properties of the layers or laminate
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Abstract
The invention discloses a buffer sandwich plate which comprises an upper clamping plate, a lower clamping plate and a middle buffer layer. The middle buffer layer is of a thin-wall polygonal grid-column structure which is composed of polygonal grid units and hollow thin-wall columns interesting between the adjacent polygonal grid units. The ends of the grid walls of the polygonal grid units are connected to the wall faces of the thin-wall columns. The circle centers of the thin-wall columns are located in the center of the grid column intersecting position. The thin-wall column structure can effectively restrain the plane external deformation of the grid walls, the bent grid wall strength and elasticoplastic deformation capacity are improved, it is ensured that the grid units and the thin-wall columns work together all the time, the compressive strength and buffer performance of the sandwich plate are effectively improved, the sandwich plate with lower weight, higher strength and better buffer performance is obtained, the buffer sandwich plate is particularly applicable to the fields of aerospace, ship traffic and the like, and life and property security of people and the main body structure can be effectively ensured.
Description
Technical field
The present invention relates to a kind of sandwich plate, particularly relate to a kind of sandwich layer and have thin-walled polygonal gird-rod structure shock-absorbing clip laminate, its grid wall and post all have thin-walled feature.
Background technology
Have become as today of product primary evaluation index in energy-conserving and environment-protective, the research of Novel light high-strength structure is subject to people's attention.The features such as battenboard is lightweight with it, rigidity is big, shock-absorbing capacity is good become one of indispensable structures in field such as Aeronautics and Astronautics, railway, automobile, building.Owing to cost of manufacture is higher at the beginning, the fifties in last century rises and is mainly used in aerospace field.After be gradually applied to other industrial circles along with scientific and technological progress, the improvement of process.The material making sandwich plate has papery, composite, resin, metal etc..The feature of sandwich plate high-strength light is structure mainly due to its intermediate core layer.But since sandwich plate uses, it is possibly due to grid wall thin the thinnest (such as aluminum, papery, have below 0.01 millimeter), it is that the sandwich plate of thin-wall construction is almost without improvement for interlayer, have improvement is the sandwich plate of advanced composite material (ACM) mostly, such as chiral sandwich plate, integration sandwich plate etc..Therefore, in decades for the sandwich plate that sandwich layer is thin-wall construction, its sandwich layer or six limits, the change of the shapes such as grid, or the change of size, and almost without the structure of interlayer core is improved, thus cause its every mechanical property there is no an essence raising, not immediately following development, the application potential that developing shock-absorbing clip laminate is bigger of modern science and technology.The Chen Jin sandwich layer that proposes such as auspicious has the sandwich plate of reinforcing prop before, but it is concluded that although honeycomb sandwich panel can be effectively improved the compressive property of cellular board after theory analysis proves with experiment, every mechanical performance index in terms of the inelastic deformation such as anti-bending strength and deformation behavior, but to being applied to the purposes such as the buffering energy-absorbing requiring to have plastic deformation, then cannot meet requirement.
Summary of the invention
The technical problem to be solved is the deficiency existed for above-mentioned prior art, and it is strong to provide a kind of plastic deformation ability, the shock-absorbing clip laminate that shock-absorbing capacity is good.
For solving above-mentioned technical problem, the technical solution used in the present invention is:
A kind of shock-absorbing clip laminate, including train wheel bridge, lower plate and intermediate buffer layer, it is characterized in that: described intermediate buffer layer is thin-walled polygonal gird-rod structure, this intermediate layer thin-walled polygonal gird-rod structure is made up of polygonal gird unit and the hollow thin-wall post being intersected between adjacent polygons grid cell, the grid wall end of described polygon grill unit is connected on the wall of described thin-walled column, and the center of circle of described thin-walled column is at the center of described grid wall intersection.
Described thin-walled column is joined directly together with train wheel bridge and lower plate.
Described polygonal gird unit is equilateral triangle, square or regular hexagon.
Described thin-walled column wall thickness is not less than 1/4th of the spacing in the adjacent two thin-walled column centers of circle, and described grid wall wall thickness is 0.5～2 times of thin-walled column wall thickness.
Bonding agent is used to connect or one-shot forming between described train wheel bridge, lower plate and intermediate buffer layer；Between described middle polygonal gird unit and thin-walled column use bonding agent is connected, one-shot forming or buckle-type connection.
Fire resistant heat preserving sound insulating material is filled in described intermediate buffer layer and thin-walled column.
Described train wheel bridge and lower plate are surface plate or curved slab.
In shock-absorbing clip laminate of the present invention, by optimizing and revising the proportionate relationship between the thickness of thin-walled column and the height of intermediate buffer layer, the impact that will act at sandwich plate surface is transferred on intermediate buffer layer and absorbs impulsive force, thus the deformity out of plane of operative constraint grid wall, improve grid wall Post-Bucking Strength and ability of elastic-plastic deformation, and ensure the two cooperation all the time.Compared to conventional interlayer plate, its ultimate compressive bearing capacity, vertical deformation ability during destruction, shock-absorbing capacity etc. is obviously improved.Compare the sandwich plate that with the addition of solid pillar, then can save material, give full play to the performance of material so that the Mass Distribution of structure evenly, more rationally；There is the sandwich plate of grid wall in comparing thin-walled column, more save material, meanwhile, with it as skeleton, when filling functional material, be also more prone to be filled with.Sum it up, it is a kind of lightweight, intensity is high, shock-absorbing capacity is good sandwich, it is adaptable to various fields, it is particularly well-suited to Aero-Space, vessel traffic etc. to the more high field of sandwich plate shock-absorbing capacity requirement.
Accompanying drawing explanation
Fig. 1 reinforcing prop sandwich plate and conventional interlayer plate stress envelope.
Wherein (a) reinforcing prop sandwich plate；(b) conventional interlayer plate
Fig. 2 reinforcing prop sandwich plate and conventional interlayer plate load equivalent schematic.
Wherein (a1, b1) reinforcing prop sandwich plate；(a2, b2) conventional interlayer plate
The failure mode of Fig. 3 reinforcing prop sandwich plate.
The section of Fig. 4 reinforcing prop sandwich plate unit grid wall intersection shares situation analysis model.
The wherein partitioning scenario of (a) grid wall 1, the subregion of (b) three grid wall semicircles, the subregion of (c) conventional grates wall unit.
Fig. 5 is the structural representation of thin-walled polygon grid of the present invention-rod structure shock-absorbing clip laminate.
Fig. 6 is the intermediate layer thin-walled polygon grid-rod structure schematic diagram of Fig. 5.
Fig. 7 is experimental model scale diagrams.
Wherein, the overall dimensions of (a) sandwich plate；(b) shock-absorbing clip laminate core structure size
(c) conventional interlayer plate core structure size
Fig. 8 is the concora crush load-displacement curve of shock-absorbing clip laminate and conventional interlayer plate.Wherein BHP is the shock-absorbing clip laminate of thin-walled polygonal gird-rod structure；THP is conventional interlayer plate
Fig. 9 is shock-absorbing clip laminate and conventional interlayer plate core structure deformation pattern.
Wherein, (a1-a4) is shock-absorbing clip laminate；(b1-b4) it is conventional interlayer plate
Figure 10 is can hasp type shock-absorbing clip laminate example.
Detailed description of the invention
This content is made up of two parts:
Part I, is provided fundamental basis for the present invention much larger than reinforcing prop sandwich layer by the pillar stress distribution in reinforcing prop sandwich plate and the theory analysis load that born of post periphery that strengthened.
Part II is the detailed description of the invention of the present invention, by the shock-absorbing clip laminate of polygon grid-rod structure and conventional interlayer plate with thin-walled feature are carried out flat crush test and conclude that it has the resistance to compression more outstanding than conventional interlayer plate and shock-absorbing capacity when reinforcing prop and grid wall have thin-walled feature.
Part I: theoretical basis
Fig. 1 is the Stress Map of (half is high) position in the middle of reinforcing prop sandwich plate and conventional interlayer plate.The stress concentration distribution of conventional interlayer plate is in the central part (Fig. 1 (a), arrow) of grid wall, grid wall infall stress less (Fig. 1 (a), circle)；And the stress of reinforcing prop sandwich plate concentrates the outer surface (Fig. 1 (b) being only present in pillar and grid wall, circle and arrow), the color of the cloud atlas such as the stress at pillar center is extremely low, the center is almost identical with panel (Fig. 1 (b), the center of circle).
In order to investigate reason aforesaid stresses distribution characteristics occur, Fig. 2 gives Sandwich Plates and the schematic diagram of explanation compressive load f equivalent process.And assigning to area AiThe load in region is designated as fi(Fig. 2, i=1, ┅, n), load f in figure1And f3Directly by frame A1With sandwich layer A3Be transferred to lower panel；And load f2And f4Then equivalence can arrive frame A1And A3Upper (Fig. 2 (a1)).When grid wall is placed exactly in hexagonal grid line of symmetry near frame and frame, A2And A4Area different and to Y-axis etc. asymmetric time (such as Fig. 1 (a), black color dots setting-out), be delivered to sandwich layer A3On load different, thus it can be produced Moment (Fig. 2, M0).This also makes corresponding grid wall be substantially subjected to load F and moment M0Common effect, the lateral thrust as shown in Fig. 2 (b1, b2) dotted line easily can occur；When grid wall both sides are complete grid (such as Fig. 1 (a) white point setting-out), it is believed that grid wall is by a pair equal-sized equivalent force effect.For conventional interlayer plate, this is that the equivalent force in grid wall centre position is big to the result of equivalent force superposition, and stress concentration phenomenon is serious (such as Fig. 1 (a) arrow), and the equivalent force at grid wall trident is few, stress low (Fig. 1 (a), circle).For reinforcing prop sandwich plate Fig. 1 (b), pillar has become to be primarily subjected to the main body of equivalent force, and equivalent force is mainly distributed on the periphery (Fig. 1 (b), circle) of pillar.The most not only effectively reduce pillar central part shares load (Fig. 1 (b), the center of circle), but also alleviates the equivalent force (Fig. 1 (b), arrow) in grid wall centre position.In like manner, near grid wall or the pillar of frame, it is near frame side, the load shared on the left of i.e. Fig. 2 (a1) Y-axis is by the considerably less than right side then, therefore (Fig. 1 (a), Fig. 1 (b), asterisk) is all significantly reduced near frame one lateral stress concentration phenomenon.So far, from Sandwich Plates and load f equivalent process thereof, resolved the finite element analysis result of Fig. 1 the most satisfactorily, illustrated the stress of reinforcing prop itself first and have that sandwich layer is low, the distribution characteristics of outer floor height.Therefore when the polygon grid-rod structure in sandwich plate sandwich layer possesses thin-walled feature, it is possible to preferably play function and the effect of rod structure.
In the last period, verify the phenomenon that in reinforcing prop sandwich plate, pillar sandwich layer is different with peripheral stress distribution.The shared bending-resistant mechanism that in grid-pillar patterns, pillar is risen will be investigated for this section.As for sandwich plate sandwich layer moment of flexure Producing reason, both can be asymmetric (such as Fig. 2 (a1), in Fig. 2 (a2), area A near frame grid wall structure on two sides foregoing2,A4Difference), it is also possible to be because the inhomogeneities of actual loading, foozle is caused.So that grid wall is in press-bending state (M in Fig. 20Represent moment of flexure sum produced by a variety of causes).From the point of view of experimental result, different according to grid wall lateral thrust degree, the failure mode of generation is also different: diagonal compression failure Fig. 3 (a, b, triangle) and lateral thrust destroy Fig. 3 (c, arrow, these grid wall two ends are without pillar), the latter is the damage-form that typically bends.
As a example by Fig. 4 (a) grid wall 1, can disclose the most intuitively from geometry and contain measuring body secret in grid-pillar patterns: be positioned at the pillar of three grid wall infalls, it is not only 1/3rd pillar area (Fig. 4 (a) shared equally, in place of 120 ° are marked) the lateral bending rigidity of grid wall 1 made contribution, and share equally to pillar area (Fig. 4 (b), the θ of grid wall 2 and 31LAnd θ1RIn place of being marked) also lateral bending rigidity to grid wall 1 made contribution.Analogizing by this, the contribution of the resistance moment of grid wall 1 is only had 1/3rd to be independent (Fig. 4 (b), dash area) by semicircle, and other 2/3rds share (Fig. 4 (b), θ with grid wall 2 and 3 respectively1Lθ2Rθ3Lθ1R).Although conventional grates wall there is also shared phenomenon (Fig. 4 (c), θ at infall1Lθ2Rθ3Lθ1R), but by comparison diagram 4 (b) and Fig. 4 (c), grid-pillar patterns has the feature that 1) area that shares at infall of grid wall substantially increases, i.e. more than five-pointed star institute target part in Fig. 4 (c)；2) and this share part area away from Y-axis, the contribution to the cross section resistance moment of Y-axis is big；3) length of grid wall substantially reduces (Fig. 4 (c), J○J○<J△J△).Sharing resistance to lateral bending mechanism (Fig. 4) by aforementioned pillar again, therefore in reinforcing prop sandwich plate, pillar patterns makes grid wall have the most lateral anti-bending strength, it is achieved that the invigoration effect to conventional grates wall construction.If according to the stress distribution law described in prosthomere it can be appreciated that in the case of same volume, the pillar of thin-walled will have more preferable anti-side to anti-bending strength than the sandwich plate of solid pillar.
Part II: the specific embodiment of the invention
The structural representation of present invention enforcement and intermediate course schematic diagram are the most as shown in Figure 5, Figure 6, this shock-absorbing clip laminate is made up of upper lower plate and intermediate course, upper lower plate is flat board, intermediate course is that the orthohexagonal grid close-packed arrays of sandwich-like forms, the junction of every 3 orthohexagonal cell walls 1 is equipped with a thin-walled column 2, as shown in Figure 6.Post must possess thin-walled feature, forms thin-walled polygon grid-rod structure together with grid wall, and the sandwich plate that such core structure is formed can preferably play the advantage of reinforcing prop structure, reaches have stronger plastic deformation, meets the purpose of energy-absorbing, power consumption.Use flat crush test compared with conventional interlayer plate, illustrate and there is the shock-absorbing clip laminate of thin-walled column structure have more excellent mechanical property, probe into thin-walled column structure impact and failure mechanism on sandwich layer during concora crush.Shock-absorbing clip laminate and conventional interlayer plate block mold size such as Fig. 7 (a) used by experiment are shown, one-body molded by 3D printing technique, and its sandwich layer sectional area of the sandwich plate of two kinds of different structures is identical, i.e. volume is identical, therefore has more comparability.The flat crush resistance of two kinds of sandwich plates uses concora test to measure, and test uses displacement loading mode, and concora test device is CMT5105 electronic universal material testing machine, and loading speed is 1mm/min.
Fig. 8 (a) is shock-absorbing clip laminate and the load-displacement curve of conventional interlayer plate flat crush test, from this curve, 1) the thin-walled column structure in shock-absorbing clip laminate can retrain the flat out-of-plane buckling of the grid wall being attached thereto effectively, improves its Post-Bucking Strength and ability of elastic-plastic deformation.Even if grid wall and thin-walled column structure produce crack, the two also will not be deactivated completely, can continue shared vertical load.The grid wall of conventional interlayer plate produces the outer bending deformation of plane during concora crush, and brittle break occurs；2) due to the effect of above-mentioned thin-walled column so that the ultimate compressive bearing capacity of shock-absorbing clip laminate goes out 15.4% than conventional interlayer plate hight；3) vertical deformation when shock-absorbing clip laminate destroys completely is 6mm, and conventional interlayer plate destroys completely when vertical deformation reaches 3.7mm, and its vertical deformation energy force rate conventional interlayer plate increases by 60%, illustrates that the ductility of shock-absorbing clip laminate is significantly higher than conventional interlayer plate.And in compression process, shock-absorbing clip laminate is ductile fracture, conventional interlayer plate is brittle break；4) the concora crush load-displacement curve equation setting shock-absorbing clip laminate and conventional interlayer plate respectively is respectively as follows: y1=L1(x)；y2=L2(x), wherein LiX () is vertical load, x is the vertical deformation of shock-absorbing clip laminate, is integrated the load-displacement curve of the two to obtain two kinds of shock-absorbing clip laminates from starting by the size of absorbed energy when being pressed onto destruction according to formula 1.Can obtain the energy that shock-absorbing clip laminate absorbs in whole compression process is 184.8J, and conventional interlayer plate is then 88.4J, and ratio conventional interlayer plate increases by 110%, illustrates that shock-absorbing clip laminate has higher deformation energy dissipation capacity.When shock-absorbing clip laminate is by the impact load, absorbable more impact energy, thus preferably protection agent structure and the security of the lives and property of people.
The vertical deformation that wherein two kinds of shock-absorbing clip laminates of Δ are corresponding when destroying completely
For obtaining shock-absorbing clip laminate and the destruction situation of conventional interlayer plate core structure, use saw blade to be cut by the side panel of two kinds of shock-absorbing clip laminates, obtain shock-absorbing clip laminate (a) and conventional interlayer plate (b) core structure deformation pattern in Fig. 9.(Fig. 9 (a1) is understood by two kinds of shock-absorbing clip laminate actual core substrate deformation figures, Fig. 9 (b1)), under vertical uniform load q, grid wall in shock-absorbing clip laminate core structure and thin-walled column structure all produce the wavy deformation (Fig. 9 (a1) arrow) of S type；Grid wall in conventional interlayer plate core structure then only to its side generation drum song, produces c-type deformation, the grid wall intersection's obvious torsional deflection of appearance (Fig. 9 (b1) arrow, asterisk).Occurring to destroy in the middle part of tradition sandwich layer grid wall and deactivate, continue to undertake vertical load is the triangular column that formed of grid wall intersection, and inherently there is thin-walled column structure in shock-absorbing clip laminate core structure.Therefore to conveniently compare the difference of two kinds of shock-absorbing clip laminate flat crush resistances, two kinds of core structures are all regarded as and is formed (Fig. 9 (a2), Fig. 9 (b2)) by pillar patterns and grid wall (thin plate) structure: shock-absorbing clip laminate sandwich layer consists of thin-walled column and grid wall, the two is at A, connect at B, C；Conventional interlayer plate core structure consists of triangular column and grid wall, and the two connects at A ', B ', C ' place, and assume the triangular column scope of grid wall intersection as shown in Fig. 9 (b3) broken circle, its diameter is identical with thin-walled column.By Fig. 9 (a1), in Fig. 9 (b1), scope shown in dotted line frame is as research shock-absorbing clip laminate and the elementary cell of conventional interlayer plate core structure, and its deformation such as Fig. 9 (a2), shown in Fig. 9 (b2).The impact on interlayer sandwich layer failure mode of the thin-walled column structure is illustrated in terms of bending deformation mode three separately below from failure mode, the edge-restraint condition of grid wall and the plane thereof of grid wall intersection pillar.
1) failure mode of grid wall intersection pillar: as the above analysis, the fundamental difference between two kinds of core structures is that the little post shapes of grid wall intersection is different: one is thin-walled column, another triangular column being made up of grid wall.It is known that pillar can compress, bend and reverse three kinds of variant under vertical uniform load q, wherein bending and torsion belongs to buckling deformation, its critical bearing capacity is far below compression.Be primarily due to carry out is flat crush test, and the pillar (either thin-walled column or triangular column) being thus in grid wall intersection is certain to compression.Secondly because have grid wall around the two as lateral support, therefore it is difficult to destroy because of flexural deformation.In this case, torsional deflection then becomes the principal element determining that pillar destroys.Under vertical load, remain silent the torsional rigidity rigidity of thin-walled column in cross section far above the triangular column of opening section, therefore such as Fig. 9 (a3, b3) shown in; the thin-walled column structure in the shock-absorbing clip laminate of thin-walled polygonal gird-rod structure is nearly free from torsional deflection, but owing to compression forms the wavy deformation of S type；Triangular column in conventional interlayer plate is then based on torsional deflection, and three grid walls form the flat out-of-plane buckling of C-shaped.Obviously, the compression bearing capacity of thin-walled column is apparently higher than the torsional buckling bearing capacity of triangular column.
2) edge-restraint condition of grid wall: as the above analysis, in the case of identical vertical load, triangular column produces torsion angle (Fig. 9 (b2)) around O point.The most just because of this, although the grid wall of the interlayer core structure of thin-walled polygonal gird-rod structure and conventional interlayer core structure is connected with thin-walled column and triangular column the most respectively, but actually the edge-restraint condition of grid wall (it is in the nature one piece of thin plate) is different, such as Fig. 9 (a4), Fig. 9 (b4) is shown.Upper and lower panel will not occur to rotate outside plane, is therefore all affixed (Fig. 9 (a4), Fig. 9 (b4) solid line) between grid wall and the upper and lower panel in two kinds of different core structures.But owing to triangular column produces torsion angle under vertical uniform load q, according to the deformation harmonization principle of the two, the grid wall being attached thereto is at A ', B ', C ' place also can produce rotational angle theta, so conventional grates wall the most hinged (Fig. 9 (b4) dotted line)；Thin-walled column, then based on compression, is nearly free from torsion, and therefore the connection between its grid wall and pillar is affixed (Fig. 9 (a4) solid line).It is to say, the grid wall essence in shock-absorbing clip laminate is for the affixed thin plate in four limits, the grid wall in conventional interlayer plate is then that both sides are affixed, and both sides are hinged.
3) the outer bending deformation mode of grid wall plane: owing to the different outer bending deformation mode of plane causing grid wall of above-mentioned thin plate failure mode from the connected mode of pillar and pillar patterns own are also different.According to deformation harmonization principle, the outer bending deformation mode of the plane that in shock-absorbing clip laminate core structure, grid wall occurs is identical with thin-walled column structure, it is the wavy deformation (AB of three half-waves, BC, the 3rd rank buckling mode of CD, i.e. thin plate), and conventional grates wall is identical with triangular column, c-type for only one of which half-wave deforms (the first rank buckling mode of A ' B ', i.e. thin plate).According to thin plate Post-buckling Theory, thin plate occurs the critical load value of the 3rd rank buckling mode to be greater than the first rank buckling mode.
In sum, thin-walled polygon grid-rod structure shock-absorbing clip laminate and conventional interlayer plate seem close core structure, and its deformation and failure mode under load action is the most entirely different.The design that optimizes of this exquisiteness then makes failure mode, the edge-restraint condition of grid wall itself and plane thereof the bending deformation mode outward of grid wall intersection pillar all create change, and affects the plastic deformation performance of global interlayers plate further.As it was previously stated, thin-walled polygon grid-rod structure sandwich plate its resistance to compression of tentative confirmation and shock-absorbing capacity are obviously improved relative to conventional interlayer plate, it is that a kind of weight is lighter, intensity is bigger, the more preferable Sandwich Plates of plastic deformation ability.Except general field, it is more suitable for Aero-Space, boats and ships or transportation etc. to the higher field of cellular board buffering energy-consumption Capability Requirement.So its range of application is extremely extensive, it is a significant innovation to conventional interlayer plate, provides new research direction for buffering energy-consumption structure.
Shock-absorbing clip laminate of the present invention, its manufacture method of different materials can be entirely different, as with resin, plastics, can use mould global formation；As with fibrous material, method for weaving can be used；As with metal material, can use the method molding that adhesive approaches and punching press combine.
Polygonal gird structure of the present invention is not limited to orthohexagonal sandwich, and this lattice structure can also be equilateral triangle, square structure.The shape of thin-walled column can be circular or polygon.
1 one kinds of high-strength light edge sealing shock-absorbing clip laminates of embodiment
This structure is by upper lower plate, and the grid layer composition containing thin-walled column.Sheet material surrounding is made and the edge sealing structure of sheet material one as required, it is simple to normalization uses；
2 one kinds of light high-strength heat preservation heat insulation shock-absorbing clip laminates of embodiment
This structure is except by upper lower plate, and outside the grid layer composition containing thin-walled column, selected material is all the preferable material of thermal and insulating performance, and at the cavity of intermediate layer, clog insulation material, realize this sheet material on the basis of high-strength light, also there is the most excellent thermal and insulating performance；
3 one kinds of high-strength light sound insulation shock-absorbing clip laminates of embodiment
This structure is except by upper lower plate, and outside the grid layer composition containing thin-walled column, and the filling preferable material of sound insulation value in the cavities so that this sheet material reaches the purpose of high-strength light sound insulation；
4 one kinds of high-strength light interlayer curved slabs of embodiment
This structure is still by upper lower plate, and the grid layer composition containing thin-walled column, but when making, by adjusting mould, it is achieved plate face, by putting down change song, strengthens the scope of application of sheet material；
5 one kinds of high-strength lights of embodiment can buckle type shock-absorbing clip laminate
This structure is except there being upper lower plate, containing the grid layer of thin-walled column, and outside the edge sealing of surrounding, is also devised with corresponding lapping fastener (as shown in Figure 10) at edge sealing, facilitates sheet material splicing in use.
Claims (7)
1. a shock-absorbing clip laminate, including train wheel bridge, lower plate and intermediate buffer layer, it is characterized in that: described intermediate buffer layer is thin-walled polygonal gird-rod structure, this intermediate layer thin-walled polygonal gird-rod structure is made up of polygonal gird unit and the hollow thin-wall post being intersected between adjacent polygons grid cell, the grid wall end of described polygon grill unit is connected on the wall of described thin-walled column, and the center of circle of described thin-walled column is at the center of described grid wall intersection.
Shock-absorbing clip laminate the most according to claim 1, it is characterised in that: described thin-walled column is joined directly together with train wheel bridge and lower plate.
Shock-absorbing clip laminate the most according to claim 1, it is characterised in that: described polygonal gird unit is equilateral triangle, square or regular hexagon.
Shock-absorbing clip laminate the most according to claim 1, it is characterised in that: described thin-walled column wall thickness is not more than 1/4th of the spacing in the adjacent two thin-walled column centers of circle, and described grid wall wall thickness is 0.5 ~ 2 times of thin-walled column wall thickness.
Shock-absorbing clip laminate the most according to claim 1, it is characterised in that: use bonding agent to connect or one-shot forming between described train wheel bridge, lower plate and intermediate buffer layer；Between described middle polygonal gird unit and thin-walled column use bonding agent is connected, one-shot forming or buckle-type connection.
Shock-absorbing clip laminate the most according to claim 1, it is characterised in that: in described intermediate buffer layer and thin-walled column, fill fire resistant heat preserving sound insulating material.
Thin-walled polygonal gird the most according to claim 1-rod structure shock-absorbing clip laminate, it is characterised in that: described train wheel bridge and lower plate are surface plate or curved slab.
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| CN106777516A (en) * | 2016-11-11 | 2017-05-31 | 吉林大学 | A kind of bionical compound aviation housing construction |
| CN107192298A (en) * | 2017-07-24 | 2017-09-22 | 何辉海 | High-strength composite board |
| CN108638594A (en) * | 2018-05-10 | 2018-10-12 | 东南大学 | A kind of polygonal gird sandwich plate and preparation method thereof |
| CN111114024A (en) * | 2020-01-09 | 2020-05-08 | 李铁骑 | Polygonal structure assembly, preparation method thereof and sandwich plate |
| CN113874583A (en) * | 2019-02-28 | 2021-12-31 | 纽帕克地垫综合服务有限责任公司 | Overlapping modular mat system including mat assembly with reinforcement members |
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