CN102303427B - Dual-interlayer symmetrical multi-pyramid configuration three-dimensional integrally-braid lattice composite material and preparation method thereof - Google Patents

Dual-interlayer symmetrical multi-pyramid configuration three-dimensional integrally-braid lattice composite material and preparation method thereof Download PDF

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CN102303427B
CN102303427B CN201110193654.7A CN201110193654A CN102303427B CN 102303427 B CN102303427 B CN 102303427B CN 201110193654 A CN201110193654 A CN 201110193654A CN 102303427 B CN102303427 B CN 102303427B
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panel layer
flaggy
yarn
symmetrical
braiding
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CN102303427A (en
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李典森
江雷
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Beihang University
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Abstract

The invention relates to a dual-interlayer symmetrical multi-pyramid configuration three-dimensional integrally-braid lattice composite material and a preparation method thereof. The composite material comprises an upper panel layer, a middle panel layer, a lower panel layer and lattice core layers arranged between the upper panel layer and the middle panel layer as well as between the middle panel layer and the lower panel layer. The composite material is characterized in that the upper panel layer, the middle panel layer and the lower panel layer form a dual-interlayer structure, the lattice core layers are of a space network truss structure consisting of symmetrical multi-pyramid configuration unit cells arranged periodically and communicated through holes, and the lattice core layers, the upper panel layer, the middle panel layer and the lower panel layer are weaved, alternated, wound and sutured into a whole according to the design rule and are subjected to once resin injection forming by adopting a resin transfer process. The preparation method in the invention comprises the steps of: 1, preparing the upper panel layer, the middle panel layer and the lower panel layer; 2, drilling a needle hole; 3, preparing the lattice core layers; and 4, curing and forming resins. The composite material prepared by the method has better integrity, more excellent mechanical property, lighter mass, higher bearing efficiency and better functionality in comparison with the traditional interlayer structure composite material.

Description

The symmetrical polygonal pyramid configuration of double sandwich three-dimension integrally braiding lattice composite material and preparation method thereof
Technical field
The present invention relates to composite material for weaving and technology of preparing thereof, particularly the symmetrical polygonal pyramid configuration three-dimension integrally braiding lattice composite material of a kind of double sandwich and preparation technology thereof, belong to engineering material preparation, structural design field.
Background technology
Sandwich structure composite material is applied to the manufacturing sector of Aero-Space and boats and ships more and more because of the large outstanding advantages of specific stiffness, in engineering, is also more and more paid attention to.In the manufacture process of sandwich, the quality of panel and with the adhesion strength of laminboard layer be the key factor that affects sandwich performance.Existing sandwich structure composite material, above and below flaggy adopts laying, laminate structures conventionally, and panel layer interlaminar shear strength is low, and delamination failure and counter-bending poor mechanical property very easily occur between panel when stressed.Simultaneously, another failure mode of sandwich is the destruction of coming unstuck of the bonding between panel and laminboard layer, due to the therebetween sandwich layer of composite product, single with the Interface Construction of upper and lower panel, be easy to cause above and below flaggy and the therebetween sandwich layer delamination that comes unstuck, cannot normally use.
Common laminboard layer has cellular material and foamed material etc., and the shear resistance of these materials is very weak, and in order to mate the shearing strength of laminboard layer, panel conventionally must be very thin, can not give full play to the high-strength pulling-resisting ability of high-performance fiber panel.In recent years, a kind of novel high specific strength, high specific stiffness lattice material have been developed in the world.Lattice material is a kind of orderly ultralight porous material designing by model molecule dot matrix configuration, be similar to existing space net rack, its inner each root beam column stressed all can be designed to not produce flexural deformation in simple tension or compression, and can obtain the minimum weight index under same load.The common topology configuration of lattice material comprises Kagome structure, cycle truss structure, rectangular pyramid structure, octahedral structure, tetrahedron and full spandrel frame.But common lattice material mostly is metal material at present, and fibre reinforced composites seldom, also lack ripe lattice composite material preparation technology.And for existing single sandwich lattice composite material, dot matrix fuse does not all possess higher height, be that in interlayer, the height of fuse is limited, generally be no more than 30mm, and dot matrix fuse lacks the effective strong point, in band height, reach 20mm when above, the easy unstability of fuse, there is failure by shear, finally cause composite structure to use.Therefore, need design and prepare novel sandwich function lattice material, to meet the field structure microlight-types such as Aero-Space, optimum configuration design, the Structural Design Requirement of structure multifunctional.
Summary of the invention
For the deficiencies in the prior art, the object of the invention is to propose the symmetrical polygonal pyramid configuration of a kind of double sandwich three-dimension integrally braiding lattice composite material and preparation method thereof, this composite structure good integrity, quality has improved the load-carrying efficiency of structure gentlier, greatly, the stability of structure, resistance to compression, the mechanical property such as anti-shearing, counter-bending all been significantly enhanced, and can realize easily stealthy, intelligent and other multifunction requirements.This preparation method's technique is simple, and environmental pollution is little, and production efficiency is high, and cost is relatively low.
The technical scheme that the present invention solves described composite technology problem is as follows:
The symmetrical polygonal pyramid configuration of a kind of double sandwich three-dimension integrally braiding lattice composite material of the present invention's design, it is by flaggy above, middle panel layer and below flaggy and be arranged on upper panel layer, in below the dot matrix core layer between flaggy form, it is characterized in that: on, in, flaggy forms double sandwich structure below, described dot matrix core layer is the hole spatial network truss structure that the symmetrical polygonal pyramid configuration unit cell of periodic arrangement forms that communicates, and this dot matrix core layer and upper, in, it is interspersed that flaggy is pressed design rule braiding below, be wound around stitching as a whole, and adopt a greasing moulding of resin crimping and transfer processes.
Further feature of the present invention be described flaggy above, middle panel layer and below flaggy be to adopt four step rule 3 D multi-directional integral weaving technology, by the multidirectional integral weaving prefabricated component of high performance fibre material weaving three-dimensional, prepared; Described high performance fibre material refers to a kind of in carbon fiber, Kafra fiber, glass fibre, aramid fiber, high-tenacity polyethylene fibre, basalt fibre etc.Described 3 D multi-directional integral weaving prefabricated component refer to there is specific braid angle, the 3 D multi-directional integral weaving thing of special fiber volume content, specific braiding structure.The scope of described braid angle is that between 0 °-50 °, the scope of described fiber volume fraction is between 20%-70%, described braiding structure refer to three-dimensional four-way, three-dimensional five to, three-dimensional six to a kind of in braiding structure with three-dimensional seven.Described upper, middle and lower panel layer can be selected identical high performance fibre material 3 D multi-directional integral weaving thing, also can select different high performance fibre material 3 D multi-directional integral weaving things.
Feature of the present invention is also described dot matrix core layer and flaggy, middle panel layer and lower panel interlayer are a complete unseparated overall structure above, there is not the peeling of panel layer and core layer, upper panel layer, in below flaggy form double sandwich structure; Described dot matrix core layer is the hole spatial network truss structure that the symmetrical polygonal pyramid configuration unit cell of periodic arrangement forms that communicates; Described symmetrical polygonal pyramid configuration refers to a kind of in the configurations such as symmetrical triangular pyramid, symmetrical rectangular pyramid, symmetrical pentagonal pyramid.
Feature of the present invention is also that described dot matrix core layer is by fuse yarn, by design rule, in three dimensions and the braiding of upper, middle and lower panel layer, to intert, be wound around stitching to form.Described fuse yarn refers to a kind of in the yarn that the organic fibers such as carbon fiber, Kafra fiber, aramid fiber, glass fibre make; Described design rule refers to that the symmetrical polygonal pyramid configuration according to dot matrix fuse, the spatial orientation angle of fuse yarn determine; Described spatial orientation angle refer to fuse yarn in space, weave interspersed direction and vertical axes to angle, its magnitude range is between 0 °-90 °; The configuration of described dot matrix fuse, the spatial orientation angle of fuse yarn can arrange arbitrarily, forms different structures.
Feature of the present invention is also that described dot matrix fuse is centrosymmetric structure completely at upper, middle lower panel interlayer, and fuse yarn is interweaved and is wound in middle panel layer, and middle panel layer plays effective supporting role; Described dot matrix core layer height adjustable extent is large, can reach between 0-80mm, and the whole height scope that dot matrix core layer connects the formation of upper, middle and lower-ranking panel layer is between 0-120mm.
Feature of the present invention is also that the outer surface of upper, middle and lower panel layer of described composite structure is all smooth smooth, and geomery is accurate, without carrying out secondary operations, can not cause damage of composite materials.
The preparation method of the symmetrical polygonal pyramid configuration of described double sandwich three-dimension integrally braiding lattice composite material, is characterized in that being prepared as follows:
(1) prepare upper, middle and lower panel layer
Adopt four step rule 3 D multi-directional integral weaving technology, utilize the multidirectional integral weaving prefabricated component of high performance fibre material weaving three-dimensional to prepare above flaggy, middle panel layer and flaggy below.Described high performance fibre material is a kind of in carbon fiber, Kafra fiber, glass fibre, aramid fiber, high-tenacity polyethylene fibre, basalt fibre etc.; Described 3 D multi-directional integral weaving prefabricated component refer to there is specific braid angle, the 3 D multi-directional integral weaving thing of special fiber volume content, specific braiding structure.
(2) countersink pinhole
According to design rule, with drilling machine vertical drill pin hole on the relevant position of described upper, middle and lower panel layer prefabricated component, the diameter of the diameter of pin hole and fuse yarn matches; Pinhold density be 500-8000 hole/square metre.Described design rule refers to that the symmetrical polygonal pyramid configuration according to dot matrix fuse, the spatial orientation angle of fuse yarn determine.Described symmetrical polygonal pyramid configuration refers to a kind of in the configurations such as symmetrical triangular pyramid, symmetrical rectangular pyramid, symmetrical pentagonal pyramid.Described spatial orientation angle refer to fuse yarn in space, weave interspersed direction and vertical axes to angle.
(3) prepare dot matrix core layer
According to the perforation designing, fuse yarn weaves and interts, is wound around and is stitched into a hollow integrated structure between the panel layer prefabricated component of upper, middle and lower, the sewing density that interts is consistent with pinhold density, for 500-8000 root/square metre, like this, prepare the symmetrical polygonal pyramid configuration of double sandwich three-dimension integrally braiding lattice composite material preform.For symmetrical rectangular pyramid configuration, it is as follows that fuse yarn weaves interspersed path at upper, middle and lower panel layer:
A. first allow yarn from first node of first symmetrical rectangular pyramid unit cell of upper surface edges and corners of flaggy above, through the lower surface of flaggy above, through in the second node of panel layer, then intert to the lower surface of flaggy below and arrive the 3rd node.Yarn arrives the 4th node from the lower surface of flaggy below along Y-direction, and then yarn oppositely tilts to intert below the upper surface of flaggy from bottom to top successively, the node of middle panel layer, above the upper surface of flaggy arrive the 5th node.Yarn arrives the 6th node from the upper surface of flaggy above along directions X, and yarn oppositely tilts to intert the lower surface of flaggy above again from the top down successively, the node of middle panel layer, below the lower surface of flaggy arrive the 7th node.Yarn is in the lower surface of flaggy below along Y-direction, arrive the 8th node, pass successively from bottom to top again the upper surface of flaggy below, middle panel layer node and the above upper surface of flaggy, finally arrive the 9th node, in braiding inserting process, four yarns along diagonal are woven mutually in the node place of middle panel layer, so, complete the yarn braiding inserting process of first symmetrical rectangular pyramid unit cell cartridge configurations.Then, yarn arrives the node of next symmetrical rectangular pyramid unit cell along the upper surface of flaggy above, again according to described path order, weave and intert, and is wound around stitching.
B. the rest may be inferred, according to the interspersed method of fuse yarn braiding of step a, take unit cell as basis, length direction along panel weaves interspersed, be wound around and sew up, weave transition arriving in the end section of panel, then intert along the yarn braiding that the length direction of panel carries out lower one deck cartridge configurations, prepare the symmetrical rectangular pyramid configuration of double sandwich dot matrix core layer.
(4) resin solidification moulding
After the braiding of fuse yarn has interted, prefabricated component is collapsed to straight stretch-draw.Overcome the situation that the yarn degree of tightness that produces in inserting process in braiding differs.By the symmetrical polygonal pyramid configuration of woven double sandwich three-dimension integrally braiding lattice composite material preform, adopt resin crimping and transfer processes, resin by injection, make upper, middle and lower panel layer and the abundant impregnating resin of dot matrix core layer, be positioned in baking oven, after composite curing, obtain the symmetrical polygonal pyramid sandwich of double sandwich of the present invention three-dimension integrally braiding lattice composite material; Described resin adopts a kind of in epoxy resin, phenolic resins, unsaturated-resin, vinylite etc.
The present invention compared with prior art, have the following advantages and high-lighting effect: the present invention adopts the preparation of 3 D multi-directional integral weaving technology to have the upper, middle and lower panel layer of 3 D multi-directional integral weaving structure, fundamentally overcome traditional laying, the fatal shortcoming of the low and easy layering of laminate structures panel layer interlaminar shear strength, has improved the mechanical property of panel layer greatly.The present invention adopts 3 D weaving to intert, be wound around sewing process, dot matrix core layer and flaggy above, middle panel layer and lower panel interlayer are formed to a complete unseparated overall structure, thoroughly avoided the panel layer of conventional interlayer structure and the delamination that comes unstuck of laminboard layer.The present invention adopts double sandwich lattice structure, overcome in existing single sandwich, limited and the fuse of the height of interlayer fuse lacks the weakness of effective strong point, in double sandwich lattice structure, dot matrix fuse is centrosymmetric structure completely, and middle panel layer plays effective supporting role to dot matrix fuse, the height of fuse is significantly increased, have larger porosity, its density reduces greatly, has improved the load-carrying efficiency of material.Meanwhile, the hole that the present invention prepares composite is communicated with, and has facilitated the Design and implementation of multifunction, as wiring, heat insulation, oil storage, damping, electromagnetic wave absorption, sound absorption and setting battery etc.The present invention adopts a greasing moulding of resin crimping and transfer processes, and the outer surface of upper, middle and lower panel layer is all smooth smooth, and shape and structure size is accurate, without carrying out secondary operations, can not cause damage of composite materials, makes composite structure have good overall performance.On the whole, double sandwich polygonal pyramid configuration three-dimension integrally braiding lattice composite material prepared by the present invention is better than traditional sandwich structure composite material globality, and mechanical property is more superior, and quality is lighter, and load-carrying efficiency is higher, functional better.Can be applicable to Aero-Space, navigation, defence equipment and the multiclass new high-tech product field such as stealthy and intelligent.
In the scope of applicant's retrieval, the symmetrical polygonal pyramid configuration of double sandwich of the present invention three-dimension integrally braiding lattice composite material and preparation method thereof yet there are no pertinent literature report.
Accompanying drawing explanation
Fig. 1 is the structural representation of the symmetrical rectangular pyramid configuration of double sandwich provided by the invention three-dimension integrally braiding lattice composite material.
Fig. 2 is the enlarged drawing of symmetrical rectangular pyramid configuration composite unit cell in Fig. 1.
Fig. 3 is the enlarged drawing of symmetrical rectangular pyramid configuration dot matrix fuse unit cell in Fig. 1.
Fig. 4 is dot matrix core layer structural representation of the present invention.
Fig. 5 is that fuse yarn braiding of the present invention interts, is wound around and sews up path schematic diagram.
Flaggy above 1-; Panel layer in 2-; Flaggy below 3-; 4-dot matrix fuse; 5-rectangular pyramid configuration unit cell; 6-fuse yarn; The spatial orientation angle of 7-fuse yarn; 8-the first node; 9-the second node; 10-the 3rd node; 11-the 4th node; 12-the 5th node; 13-the 6th node; 14-the 7th node; 15-the 8th node; 16-the 9th node;
The specific embodiment
Below in conjunction with accompanying drawing, the present invention is further illustrated.
Fig. 1 is the symmetrical rectangular pyramid configuration of a kind of double sandwich provided by the invention three-dimension integrally braiding lattice composite material structural representation, it is by flaggy 1 above, middle panel layer 2, flaggy 3 and be arranged on upper below, in below between flaggy dot matrix core layer 4 form, it is characterized in that: upper panel layer, in below flaggy form double sandwich structure, described dot matrix core layer is by the hole spatial network truss structure that the symmetrical rectangular pyramid configuration unit cell 5 of periodic arrangement forms that communicates, and this dot matrix core layer and upper, in, it is interspersed that flaggy is pressed design rule braiding below, be wound around stitching as a whole, and adopt a greasing moulding of resin crimping and transfer processes.
The present invention has designed the preparation method of the symmetrical rectangular pyramid configuration of described double sandwich three-dimension integrally braiding lattice composite material simultaneously, it is characterized in that being prepared as follows:
(1) prepare upper, middle and lower panel layer
According to four step rule 3 D multi-directional integral weaving technology, utilize the multidirectional integral weaving prefabricated component of high performance fibre material weaving three-dimensional to prepare above flaggy, middle panel layer and flaggy below.The high performance fibre material of selecting is T3006k carbon fiber.The braid angle of 3 D multi-directional integral weaving prefabricated component is 25 °, and fiber volume fraction is 60%, and braiding structure is that three-dimensional five is to braiding structure.Upper, middle and lower panel layer selects identical carbon fibre material three-dimensional five to integral weaving thing, and the appearance and size of the upper, middle and lower panel layer prefabricated component making is 500mm (length) * 380mm (wide) * 6mm (thick).
(2) countersink pinhole
The configuration of dot matrix fuse is selected symmetrical rectangular pyramid configuration, and the spatial orientation angle 7 of fuse yarn is 45 °.Adopt drilling machine is 30mm * 30mm vertical drill pin hole according to needle gage * line-spacing on the panel layer of upper, middle and lower, and the diameter of pin hole is 1.5mm, and pinhold density is every square metre and vertically penetrates 1100, fuse yarn.For above and below flaggy, from the edges and corners of prefabricated component, first respectively first hole is bored in the position that is 10mm apart from panel layer length direction and width, then the length direction along panel layer carries out first row boring, after reaching the end face of panel layer, then be transitioned into next row along the width of panel layer.So constantly circulation, until complete.For middle panel layer, for panel layer boring in guaranteeing and the boring of above and below flaggy are equidistantly staggered.First bore position is respectively apart from length direction and width 25mm, then the boring of similar above and below flaggy order, along length and width spacing 30mm, holes.Like this, the upper, middle and lower panel layer that appearance and size is 500mm * 380mm * 6mm forms 17 * 13 borings on the flaggy of above and below.On middle panel layer, form 16 * 12 borings, between hole, spacing is 30mm.
(3) core layer preparation:
According to the perforated design of upper, middle and lower panel layer, the floor height of core layer is designed to 42.42mm.Fuse yarn 6 is selected T30012k carbon fiber.Fuse yarn tilts to weave interspersed between the panel layer of upper, middle and lower, and on the panel layer of upper, middle and lower, vertical winding sewed up.Like this, fuse yarn is woven into a hollow integrated structure by dot matrix core layer and upper, middle and lower panel layer, prepares the symmetrical rectangular pyramid configuration of double sandwich three-dimension integrally braiding lattice composite material preform.Referring to Fig. 5, it is as follows that fuse yarn weaves interspersed path at upper, middle and lower panel layer:
A. first allow yarn from first node 8s of first symmetrical rectangular pyramid unit cell of upper surface edges and corners of flaggy above, through the lower surface of flaggy above, through in the second node 9 of panel layer, then intert to the lower surface of flaggy below and arrive the 3rd node 10.Yarn arrives the 4th node 11 from the lower surface of flaggy below along Y-direction, and then yarn oppositely tilts to intert below the upper surface of flaggy from bottom to top successively, the node of middle panel layer 9, above the upper surface of flaggy arrive the 5th node 12.Yarn arrives the 6th node 13 from the upper surface of flaggy above along directions X, and yarn oppositely tilts to intert the lower surface of flaggy above again from the top down successively, the node 9 of middle panel layer, below the lower surface of flaggy arrive the 7th node 14.Yarn is in the lower surface of flaggy below along Y-direction, arrive the 8th node 15, pass successively from bottom to top again the upper surface of flaggy below, middle panel layer node 9 and the above upper surface of flaggy, finally arrive the 9th node 16, in braiding inserting process, four yarns along diagonal are woven mutually in node 9 places of middle panel layer, so, complete the yarn braiding inserting process of first symmetrical rectangular pyramid unit cell cartridge configurations.Then, yarn arrives the node of next symmetrical rectangular pyramid unit cell along the upper surface of flaggy above, again according to described path order, weave and intert, and is wound around stitching.
B. the rest may be inferred, according to the interspersed method of fuse yarn braiding of step a, take unit cell as basis, length direction along panel weaves interspersed, be wound around and sew up, weave transition arriving in the end section of panel, then intert along the yarn braiding that the length direction of panel carries out lower one deck cartridge configurations, prepare the symmetrical rectangular pyramid configuration of double sandwich dot matrix core layer.
(4) resin solidification moulding
After the braiding of fuse yarn has interted, prefabricated component is collapsed to straight stretch-draw.Overcome the situation that the yarn degree of tightness that produces in inserting process in braiding differs.By woven double sandwich polygonal pyramid configuration three-dimension integrally braiding lattice composite material preform, adopt resin crimping and transfer processes, injection ring epoxy resins, make upper, middle and lower panel layer and the abundant epoxy resin-impregnated of dot matrix core layer, be positioned in baking oven, at 80 ℃, slaking is 3 hours, after resin solidification moulding, obtains the symmetrical rectangular pyramid configuration of double sandwich of the present invention three-dimension integrally braiding lattice composite material.

Claims (9)

1. the symmetrical polygonal pyramid configuration of double sandwich three-dimension integrally braiding lattice composite material, this composite is by flaggy (1) above, middle panel layer (2) and below flaggy (3) and be arranged on upper, in below the dot matrix core layer (4) between flaggy form, it is characterized in that, in, flaggy forms double sandwich structure below, described dot matrix core layer is the hole spatial network truss structure that the symmetrical polygonal pyramid configuration unit cell (5) of periodic arrangement forms that communicates, and this dot matrix core layer and upper, in, it is interspersed that flaggy is pressed design rule braiding below, be wound around stitching as a whole, and adopt a greasing moulding of resin crimping and transfer processes,
Before described dot matrix core layer is made, carry out the step of countersink pinhole, be specially:
According to design rule, with drilling machine vertical drill pin hole on the relevant position of described upper, middle and lower panel layer prefabricated component, the diameter of the diameter of pin hole and fuse yarn matches; Pinhold density be 500-8000 hole/square metre; Described design rule refers to that the symmetrical polygonal pyramid configuration according to dot matrix fuse, the spatial orientation angle of fuse yarn determine; Described symmetrical polygonal pyramid configuration refers to a kind of in symmetrical triangular pyramid, symmetrical rectangular pyramid, symmetrical pentagonal pyramid configuration; The spatial orientation angle of described fuse yarn refer to fuse yarn in space, weave interspersed direction and vertical axes to angle;
The making of described dot matrix core layer adopts following step:
According to the perforation designing, fuse yarn weaves and interts, is wound around and is stitched into a hollow integrated structure between the panel layer prefabricated component of upper, middle and lower, and the sewing density that interts is consistent with the pinhold density of boring on panel, for 500-8000 root/square metre; For symmetrical rectangular pyramid configuration, it is as follows that fuse yarn weaves interspersed path at upper, middle and lower panel layer:
First allow yarn from first node (8)s of first symmetrical rectangular pyramid unit cell of upper surface edges and corners of flaggy above, pass the lower surface of flaggy above, through in second node (9) of panel layer, then intert to the lower surface of flaggy below and arrive the 3rd node (10); Yarn arrives the 4th node (11) from the lower surface of flaggy below along Y-direction, and then yarn oppositely tilts to intert below the upper surface of flaggy from bottom to top successively, the node of middle panel layer (9), above the upper surface of flaggy arrive the 5th node (12); Yarn arrives the 6th node (13) from the upper surface of flaggy above along directions X, and yarn oppositely tilts to intert the lower surface of flaggy above again from the top down successively, the node of middle panel layer (9), below the lower surface of flaggy arrive the 7th node (14); Yarn is in the lower surface of flaggy below along Y-direction, arrive the 8th node (15), pass successively from bottom to top again the upper surface of flaggy below, middle panel layer node (9) and the above upper surface of flaggy, finally arrive the 9th node (16), in braiding inserting process, four yarns along diagonal are located to be woven mutually in the node (9) of middle panel layer, so, complete the yarn braiding inserting process of first symmetrical rectangular pyramid unit cell cartridge configurations; Then, yarn arrives the node of next symmetrical rectangular pyramid unit cell along the upper surface of flaggy above, again according to described path order, weave and intert, and is wound around stitching;
The rest may be inferred, according to the interspersed method of fuse yarn braiding of previous step, take unit cell as basis, length direction along panel weaves interspersed, be wound around and sew up, weave transition arriving in the end section of panel, then intert along the yarn braiding that the length direction of panel carries out lower one deck cartridge configurations, prepare the symmetrical polygonal pyramid configuration of double sandwich dot matrix core layer.
2. the symmetrical polygonal pyramid configuration of double sandwich according to claim 1 three-dimension integrally braiding lattice composite material, it is characterized in that: described flaggy above, middle panel layer and below flaggy are to adopt four step rule 3 D multi-directional integral weaving technology, by the multidirectional integral weaving prefabricated component of high performance fibre material weaving three-dimensional, are prepared; Described high performance fibre material refers to a kind of in carbon fiber, Kafra fiber, glass fibre, aramid fiber, high-tenacity polyethylene fibre, basalt fibre; Described 3 D multi-directional integral weaving prefabricated component refer to there is specific braid angle, the 3 D multi-directional integral weaving thing of special fiber volume content, specific braiding structure; The scope of described braid angle is that between 0 °-50 °, the scope of described fiber volume fraction is between 20%-70%, described braiding structure refer to three-dimensional four-way, three-dimensional five to, three-dimensional six to a kind of in braiding structure with three-dimensional seven.
3. the symmetrical polygonal pyramid configuration of double sandwich according to claim 2 three-dimension integrally braiding lattice composite material, it is characterized in that: described upper, middle and lower panel layer is selected identical high performance fibre material 3 D multi-directional integral weaving thing, or select different high performance fibre material 3 D multi-directional integral weaving things.
4. the symmetrical polygonal pyramid configuration of double sandwich according to claim 1 three-dimension integrally braiding lattice composite material, is characterized in that: dot matrix core layer is with flaggy, middle panel layer and lower panel interlayer are a complete unseparated overall structure above; Upper panel layer, in below flaggy form double sandwich structure; Described dot matrix core layer is the hole spatial network truss structure that the symmetrical polygonal pyramid configuration unit cell of periodic arrangement forms that communicates; Described symmetrical polygonal pyramid configuration refers to a kind of in symmetrical triangular pyramid, symmetrical rectangular pyramid, symmetrical pentagonal pyramid configuration.
5. the symmetrical polygonal pyramid configuration of double sandwich according to claim 1 three-dimension integrally braiding lattice composite material, is characterized in that: described dot matrix core layer is by fuse yarn (6), by design rule, in three dimensions and the braiding of upper, middle and lower panel layer, to intert, be wound around stitching to form; Described fuse yarn refers to a kind of in the yarn that organic fiber makes, and described organic fiber comprises carbon fiber, Kafra fiber, aramid fiber, glass fibre; Described design rule refers to that the symmetrical polygonal pyramid configuration according to dot matrix fuse, the spatial orientation angle (7) of fuse yarn determine; Described spatial orientation angle refer to fuse yarn in space, weave interspersed direction and vertical axes to angle, its magnitude range is between 0 °-90 °.
6. the symmetrical polygonal pyramid configuration of double sandwich according to claim 1 three-dimension integrally braiding lattice composite material, it is characterized in that: described dot matrix fuse is centrosymmetric structure completely at upper, middle lower panel interlayer, fuse yarn is interweaved and is wound in middle panel layer, and middle panel layer plays effective supporting role.
7. the symmetrical polygonal pyramid configuration of double sandwich according to claim 1 three-dimension integrally braiding lattice composite material, it is characterized in that: described dot matrix core layer height adjustable extent is large, between 0-80mm, the whole height scope that dot matrix core layer connects the formation of upper, middle and lower-ranking panel layer is between 0-120mm.
8. the symmetrical polygonal pyramid configuration of double sandwich according to claim 1 three-dimension integrally braiding lattice composite material, it is characterized in that: the outer surface of the upper, middle and lower panel layer of this composite is all smooth smooth, geomery is accurate, without carrying out secondary operations, can not cause damage of composite materials.
9. a preparation method for the symmetrical polygonal pyramid configuration of double sandwich three-dimension integrally braiding lattice composite material as claimed in claim 1, is characterized in that being prepared as follows:
(1) upper, middle and lower panel layer preparation
Upper, middle and lower panel layer adopts four step rule 3 D multi-directional integral weaving technology, weaves 3 D multi-directional integral weaving prefabricated component prepare by high performance fibre material; Described high performance fibre material is a kind of in carbon fiber, Kafra fiber, glass fibre, aramid fiber, high-tenacity polyethylene fibre, basalt fibre; Described 3 D multi-directional integral weaving prefabricated component refer to there is specific braid angle, the 3 D multi-directional integral weaving thing of special fiber volume content, specific braiding structure;
(2) step of described countersink pinhole;
(3) making step of described dot matrix core layer;
(4) resin solidification moulding
After the braiding of fuse yarn has interted, prefabricated component is collapsed to straight stretch-draw; Overcome the situation that the yarn degree of tightness that produces in inserting process in braiding differs; By woven double sandwich polygonal pyramid configuration three-dimension integrally braiding lattice composite material preform, adopt resin crimping and transfer processes, resin by injection, makes upper, middle and lower panel layer and the abundant impregnating resin of dot matrix core layer, is positioned in baking oven composite curing moulding; Described resin adopts a kind of in epoxy resin, phenolic resins, unsaturated-resin, vinylite.
CN201110193654.7A 2011-07-12 2011-07-12 Dual-interlayer symmetrical multi-pyramid configuration three-dimensional integrally-braid lattice composite material and preparation method thereof Active CN102303427B (en)

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