CN114670508B - Hyperbolic lattice sandwich structure and preparation method thereof - Google Patents
Hyperbolic lattice sandwich structure and preparation method thereof Download PDFInfo
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- CN114670508B CN114670508B CN202210301901.9A CN202210301901A CN114670508B CN 114670508 B CN114670508 B CN 114670508B CN 202210301901 A CN202210301901 A CN 202210301901A CN 114670508 B CN114670508 B CN 114670508B
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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
- B32B15/00—Layered products comprising a layer of metal
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
- B23K—SOLDERING OR UNSOLDERING; WELDING; CLADDING OR PLATING BY SOLDERING OR WELDING; CUTTING BY APPLYING HEAT LOCALLY, e.g. FLAME CUTTING; WORKING BY LASER BEAM
- B23K1/00—Soldering, e.g. brazing, or unsoldering
- B23K1/008—Soldering within a furnace
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
- B23K—SOLDERING OR UNSOLDERING; WELDING; CLADDING OR PLATING BY SOLDERING OR WELDING; CUTTING BY APPLYING HEAT LOCALLY, e.g. FLAME CUTTING; WORKING BY LASER BEAM
- B23K3/00—Tools, devices, or special appurtenances for soldering, e.g. brazing, or unsoldering, not specially adapted for particular methods
- B23K3/08—Auxiliary devices therefor
- B23K3/087—Soldering or brazing jigs, fixtures or clamping means
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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
- B32B15/00—Layered products comprising a layer of metal
- B32B15/04—Layered 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
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B32—LAYERED PRODUCTS
- B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
- B32B3/00—Layered products comprising a layer with external or internal discontinuities or unevennesses, or a layer of non-planar form; Layered products having particular features of form
- B32B3/02—Layered products comprising a layer with external or internal discontinuities or unevennesses, or a layer of non-planar form; Layered products having particular features of form characterised by 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 form; Layered products 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
Abstract
The embodiment of the disclosure provides a hyperbolic lattice sandwich structure and a preparation method thereof, wherein the hyperbolic lattice sandwich structure comprises: the device comprises a first curved plate, a second curved plate, a plurality of arc-shaped core frames and a plurality of wavy arc-shaped rod pieces; the arc-shaped core frame comprises a plurality of star angles, first connecting clamping grooves are formed in the same sides of corresponding vertex angles of two adjacent star angles, the wavy arc-shaped rod piece comprises a plurality of wavy angles, and second connecting clamping grooves corresponding to the first connecting clamping grooves are formed in the corresponding vertex angles of the two adjacent wavy angles; the arc-shaped core frame is arranged on the first curved plate along the radial direction, the wavy arc-shaped rod piece is arranged on the first plate along the direction orthogonal to the arc-shaped core frame, and the arc-shaped core frame and the wavy arc-shaped rod piece are fixedly connected through the first connecting clamping groove and the second connecting clamping groove; the second curved plate is arranged on the arc-shaped core frame and the wavy arc-shaped rod piece.
Description
Technical Field
Embodiments of the present disclosure generally relate to the field of curved sandwich structure manufacturing, and in particular, to a hyperbolic lattice sandwich structure and a method for manufacturing the same.
Background
Because the sandwich structure has higher specific stiffness and specific strength characteristics, the sandwich structure is less prone to destabilization compared with a single-layer thin-shell structure. Therefore, the sandwich structure has wide application prospect in the fields of satellite bearing barrels, rocket supporting cabins, deep-sea submarines, pressure-resistant cabins, heat protection and the like as a main structure.
At present, a three-dimensional lattice sandwich structure mostly takes a flat plate configuration as a research object, and research and preparation of a curved sandwich shell structure with wider application scenes are not fully started. In the existing research, the design and preparation of the curved-surface sandwich shell structure mainly adopts a composite material, and the complex curved-surface lattice sandwich structure is not prepared by adopting a metal material in a large range. Because the composite lattice is bonded with the panel by using resin or glue, the application range of the structure is limited by the temperature condition. In the field of aerospace application, the metal material has higher use temperature and has irreplaceable effect.
The design and preparation mode of the metal lattice sandwich shell at present is mainly realized by an additive manufacturing means, the structural size is greatly limited, the preparation cost is high, and an additional lattice support structure possibly does not meet the light application requirement. For the future high-speed aircraft shell structure, the preparation and design of developing a novel metal lattice sandwich shell are the important requirements of the actual application development because the lattice structure truly breaks through the conceptual stage.
Disclosure of Invention
In a first aspect of the present disclosure, there is provided a hyperbolic lattice sandwich structure comprising:
the device comprises a first curved plate, a second curved plate, a plurality of arc-shaped core frames and a plurality of wavy arc-shaped rod pieces;
the arc-shaped core frame comprises a plurality of star angles, first connecting clamping grooves are formed in the same sides of corresponding vertex angles of two adjacent star angles, the wavy arc-shaped rod piece comprises a plurality of wavy angles, and second connecting clamping grooves corresponding to the first connecting clamping grooves are formed in the corresponding vertex angles of the two adjacent wavy angles;
the arc-shaped core frame is arranged on the first curved plate along the radial direction, the wavy arc-shaped rod piece is arranged on the first plate along the direction orthogonal to the arc-shaped core frame, and the arc-shaped core frame and the wavy arc-shaped rod piece are fixedly connected through the first connecting clamping groove and the second connecting clamping groove;
the second curved plate is arranged on the arc-shaped core frame and the wavy arc-shaped rod piece.
In a second aspect of the present disclosure, a method for preparing a hyperbolic lattice sandwich structure is provided, including:
cutting out an arc-shaped core frame with a plurality of symmetrical star angles and a wave-shaped arc-shaped rod piece with a plurality of wave angles, which are orthogonal to the star angles on the arc-shaped core frame, according to the shape and the size of a curved surface to be assembled, wherein a first connecting clamping groove is formed on the same side of the corresponding vertex angle of each two adjacent star angles, and a second connecting clamping groove corresponding to the first connecting clamping groove is formed on the corresponding vertex angle of each two adjacent wave angles;
preparing an assembly mold for stably placing the arc-shaped core frames, placing all the arc-shaped core frames on the assembly mold by taking the interval distance of the wave angles on the wave-shaped arc-shaped rod pieces as a standard, and respectively clamping the wave-shaped arc-shaped rod pieces in first connecting clamping grooves on the arc-shaped core frames to enable all the arc-shaped core frames to be connected together;
and (3) attaching the assembled core layer structure to the first curved plate and the second curved plate, filling brazing paint at the connecting position, and putting the core layer structure into a vacuum brazing furnace for integral welding to complete the preparation of the double-curved lattice sandwich structure.
In some embodiments, the shape of the hyperbolic lattice sandwich is one of a hyperbolic surface, a hyperbolic arch surface, and a hyperbolic elliptical surface.
In some embodiments, the cutting mode is laser cutting, wire cutting or water cutting.
In some embodiments, the arcuate core frame and the undulating arcuate rod are identical in cross-sectional shape and uniform in size.
In some embodiments, the star-shaped corner comprises a first connecting clamping groove and flanges arranged on two sides of the first connecting clamping groove; the wave angle comprises a second connecting clamping groove and flanges arranged on two sides of the second connecting clamping groove, and the opening direction of the first connecting clamping groove on the star angle is opposite to the opening direction of the second connecting clamping groove on the wave angle.
In some embodiments, the assembly mold comprises a supporting surface in contact with the ground, and an arc concave surface consistent with the outline dimension of the arc-shaped core frame, and an axial groove corresponding to the star-delta shape is arranged in the arc concave surface.
In some embodiments, on the assembling die, the star-shaped angle of each star-shaped angle corresponds to the joint of two star-shaped angles of the former arc-shaped core frame, so that the star-shaped angles of two adjacent annular core frames after being placed are staggered.
In some embodiments, the first curved plate and the second curved plate may be integrally formed by stamping according to the size of the component, or may be split into a plurality of pieces, and then spliced to the outer surface of the arc-shaped core frame, and then reformed into a whole by welding.
In some embodiments, the first curved plate and the second curved plate are welded with a connecting piece connecting the two at two ends of the first curved plate and the second curved plate.
According to the preparation process based on the cutting interlocking, the annular core frame and the radial rod pieces are formed in a cutting mode, so that the rod pieces of the lattice structure are isotropic, the mechanical property of the core layer structure is good, and the initial defect is small; the welded sandwich structure has good connection performance with the wall surface and good structural integrity, and the restraining effect of the lattice structure on the panel can be fully exerted.
The cutting interlocking-assembling splicing process is suitable for various metal materials, can be applied to the preparation of a composite sandwich structure by changing a welding process into an adhesive process, can reduce the overall manufacturing cost, and is faster in molding.
The matters described in the summary section are not intended to limit key or critical features of the embodiments of the present disclosure nor to limit the scope of the present disclosure. Other features of the present disclosure will become apparent from the following description.
Drawings
The above and other features, advantages and aspects of embodiments of the present disclosure will become more apparent by reference to the following detailed description when taken in conjunction with the accompanying drawings. In the drawings, wherein like or similar reference numerals denote like or similar elements, in which:
fig. 1 shows a schematic structural diagram of a double-curved lattice sandwich structure in the preparation process according to the first embodiment of the disclosure;
fig. 2 shows a flowchart of a method for manufacturing a double-curved lattice sandwich structure according to a second embodiment of the present disclosure;
FIG. 3 shows a schematic structural view of an arcuate core frame of a third embodiment of the present disclosure;
fig. 4 shows a schematic structural view of a wavy arc-shaped lever according to a fourth embodiment of the disclosure.
Detailed Description
For the purposes of making the objects, technical solutions and advantages of the embodiments of the present disclosure more apparent, the technical solutions of the embodiments of the present disclosure will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present disclosure, and it is apparent that the described embodiments are some embodiments of the present disclosure, but not all embodiments. All other embodiments, which can be made by one of ordinary skill in the art without undue burden from the disclosure, are within the scope of the disclosure.
In addition, the term "and/or" herein is merely an association relationship describing an association object, and means that three relationships may exist, for example, a and/or B may mean: a exists alone, A and B exist together, and B exists alone. In addition, the character "/" herein generally indicates that the front and rear associated objects are an "or" relationship.
The design of the hyperbolic lattice sandwich shell structure is based on the concept of expandable surface mapping, the Gaussian curvature of the hyperbolic structure is not zero, and generally, the hyperbolic forming mode comprises two modes of sweeping and rotating (shown in figure 1), and a bus and a wire in the sweeping or rotating surface forming process respectively correspond to the central lines of mutually orthogonal curve core bars. For lattice sandwich structures, the mapping process of hyperbolic curved surface configuration and traditional plane configuration bending transformation also comprises transformation of cells with a core layer orthogonal pyramid configuration. The method is equally applicable to cylinders with gaussian curvatures of constant zero.
The invention aims at providing a brand new preparation process aiming at a curved-surface lattice sandwich structure based on a cutting interlocking-vacuum brazing method, and prepares a lattice sandwich shell with all-metal facing hyperbolic curved-surface configuration. The structure has wide use temperature range, can bear complex thermodynamic load conditions, and has reliable connection performance between the sandwich structure shell core layer and the panel.
Fig. 1 is a schematic structural diagram of a double-curved lattice sandwich structure in the preparation process according to the first embodiment of the disclosure. The hyperbolic lattice sandwich structure of this embodiment includes: the device comprises a first curved plate 4, a second curved plate 1, a plurality of arc-shaped core frames (2, 3) and a plurality of wavy arc-shaped rod pieces 5; the arc-shaped core frames (2, 3) comprise a plurality of star angles, first connecting clamping grooves are formed in the same sides of corresponding vertex angles of two adjacent star angles, the wavy arc-shaped rod piece 5 comprises a plurality of wavy angles, and second connecting clamping grooves corresponding to the first connecting clamping grooves are formed in the corresponding vertex angles of the two adjacent wavy angles; the arc-shaped core frames (2, 3) are arranged on the first curved plate 4 along the radial direction, the wavy arc-shaped rod pieces 5 are arranged on the first curved plate 4 along the direction orthogonal to the arc-shaped core frames (2, 3), and the arc-shaped core frames (2, 3) and the wavy arc-shaped rod pieces 5 are fixedly connected through the first connecting clamping grooves and the second connecting clamping grooves; the second curved plate 1 is arranged on the arc-shaped core frames (2, 3) and the wavy arc-shaped rod pieces 5.
As shown in fig. 2, a flow chart of a preparation method of a double-curved lattice sandwich structure according to a second embodiment of the present disclosure is shown, and the preparation method of the double-curved lattice sandwich structure according to the present embodiment includes the following steps:
The assembly mold comprises a supporting surface in contact with the ground and an arc-shaped concave surface consistent with the outline dimension of the annular core frame, wherein an axial groove corresponding to the star-delta top angle position of the outer side surface of the annular core frame is arranged in the arc-shaped concave surface.
When the assembly mold is used, the supporting surface is used for placing the assembly mold on the mounting table, the arc concave surface faces upwards, the annular core frames are placed in the arc concave surface, the rectangular protrusions at the top end of each star angle of each annular core frame in the arc concave surface are respectively clamped into one axial groove, the star angle of each adjacent annular core frame corresponds to the joint of two star angles of the previous annular core frame, namely, each annular core frame is placed in a manner that the star angles of the adjacent two annular core frames are staggered, and the interval distance between each annular core frames corresponds to the wave angle top angle position on the radial rod piece.
And each star-angle vertex angle and the interconnecting position of the inner side surface of the all annular core frames after the installation are respectively clamped with a radial rod piece, so that a three-dimensional pyramid-shaped lattice structure is integrally formed.
And 300, attaching the assembled core layer structure to the first curved plate and the second curved plate, filling brazing paint at the connecting position, and putting the core layer structure into a vacuum brazing furnace for integral welding to complete the preparation of the double-curved lattice sandwich structure.
The pressing jig may need to be prepared according to the curved surface characteristics during welding.
In order to facilitate the installation of the curved surface panel, the whole curved surface body can be divided into a plurality of symmetrical parts, and then the whole curved surface body is formed again by adopting a welding mode after splicing. Taking a cylindrical shape as an example, the shell of the expandable curved surface is axially divided into three sector blocks by a complete cylindrical shape according to a 120-degree mode, then the three sector blocks are respectively buckled on the outer side surface of the annular core frame, and the three sector blocks are welded together by resistance welding.
This approach can avoid the difficulty of one-shot molding due to excessively complex curved surfaces or oversized surfaces. Although a simple explanation of the division of the cylindrical surface into three pieces is given here, in other embodiments, the clipping method may be self-designed according to the form of the curved surface.
The shape of the hyperbolic lattice sandwich structure is one of hyperbolic curved surface, hyperbolic arch surface and hyperbolic elliptic surface.
In this embodiment, the arc-shaped core frame and the wavy arc-shaped rod member have the same cross-sectional shape and are uniform in size. The star-shaped angle comprises a first connecting clamping groove and flanges arranged on two sides of the first connecting clamping groove; the wave angle comprises a second connecting clamping groove and flanges arranged on two sides of the second connecting clamping groove, and the opening direction of the first connecting clamping groove on the star angle is opposite to the opening direction of the second connecting clamping groove on the wave angle.
The assembly die comprises a supporting surface in contact with the ground and an arc-shaped concave surface consistent with the outline dimension of the arc-shaped core frame, and an axial groove corresponding to the star-delta top angle shape is formed in the arc-shaped concave surface. On the assembly mold, the star angles of the two adjacent star angles of the annular core frames after being placed are staggered mutually by corresponding to the connecting positions of the two star angles of the former arc-shaped core frames. The first curved plate and the second curved plate can be integrally formed by stamping according to the size of the component, and can be respectively spliced on the outer surface of the arc-shaped core frame after being divided into a plurality of scattered sheets, and then the whole body is formed by welding.
In addition, the two ends of the first curved plate and the second curved plate after being mounted can be welded with connecting pieces for connecting the two.
FIG. 3 is a schematic view of an arc-shaped core frame; the polygonal shape is formed by a continuous connection mode that the vertex angle of one star angle protrudes outwards, and the vertex angle of the adjacent star angle protrudes inwards, so that a wavy arc structure is integrally formed, and all angles are completely consistent. The arc-shaped core frame is in a flat state in an unconnected state, is in a wavy fluctuation state as a whole, and has all wave angles which are completely consistent and consistent with the angles of star angles. Fig. 4 shows a schematic structural view of a wavy arc-shaped lever according to a fourth embodiment of the disclosure. The structure of the wavy arc-shaped rod piece is referred to as the structure of the arc-shaped core frame, and will not be explained here.
The cutting mode can be laser cutting, wire cutting or water cutting. The cut annular core frame has the same cross section shape as the radial rod pieces and the same size, namely, two annular core frames can be formed by cutting stainless steel plates of the same model, and the cutting size is directly cut according to the uniform size.
The clamping groove structure positioned on the star-shaped angle and the wave-shaped angle comprises flanges arranged on two sides and grooves clamped in the middle by the flanges on two sides, and the clamping groove at the joint of the two star-shaped angles and the two wave-shaped angles (namely, the positions opposite to the outer side surfaces are the top angles) directly comprises the flanges by the two connected side edges, and the middle forms a concave groove. The vertex angle of the star angle faces to the vertex angle of the outer side surface and the other side edge of the wave angle opposite to the groove are respectively bulges in a rectangular shape. The lattice form may include pyramid or octahedron
The assembly mold comprises a supporting surface in contact with the ground and an arc-shaped concave surface consistent with the outline dimension of the annular core frame, wherein an axial groove corresponding to the star-delta top angle position of the outer side surface of the annular core frame is arranged in the arc-shaped concave surface.
When the assembly mold is used, the supporting surface is used for placing the assembly mold on the mounting table, the arc concave surface faces upwards, the annular core frames are placed in the arc concave surface, the rectangular protrusions at the top end of each star angle of each annular core frame in the arc concave surface are respectively clamped into one axial groove, the star angle of each adjacent annular core frame corresponds to the joint of two star angles of the previous annular core frame, namely, each annular core frame is placed in a manner that the star angles of the adjacent two annular core frames are staggered, and the interval distance between each annular core frames corresponds to the wave angle top angle position on the radial rod piece.
And each star-angle vertex angle and the interconnecting position of the inner side surface of the all annular core frames after the installation are respectively clamped with a radial rod piece, so that a three-dimensional pyramid-shaped lattice structure is integrally formed.
According to the preparation process based on cutting interlocking, an arc-shaped core frame is formed by using a cutting mode, so that a rod piece of a lattice structure is isotropic, the mechanical property of a core layer structure is good, and initial defects are small; the welded sandwich structure has good connection performance with the wall surface and good structural integrity, and the restraining effect of the lattice structure on the panel can be fully exerted.
The cutting interlocking-assembling splicing process is suitable for various metal materials, can be applied to the preparation of a composite sandwich structure by changing a welding process into an adhesive process, can reduce the overall manufacturing cost, and is faster in molding.
Claims (6)
1. A hyperbolic lattice sandwich structure, comprising:
the device comprises a first curved plate, a second curved plate, a plurality of arc-shaped core frames and a plurality of wavy arc-shaped rod pieces;
the arc-shaped core frame comprises a plurality of star angles, first connecting clamping grooves are formed in the same sides of corresponding vertex angles of two adjacent star angles, the wavy arc-shaped rod piece comprises a plurality of wavy angles, and second connecting clamping grooves corresponding to the first connecting clamping grooves are formed in the corresponding vertex angles of the two adjacent wavy angles;
the arc-shaped core frame is arranged on the first curved plate along the radial direction, the wavy arc-shaped rod piece is arranged on the first curved plate along the direction orthogonal to the arc-shaped core frame, and the arc-shaped core frame and the wavy arc-shaped rod piece are fixedly connected through the first connecting clamping groove and the second connecting clamping groove;
the second curved plate is arranged on the arc-shaped core frame and the wavy arc-shaped rod piece;
the shape of the hyperbolic lattice sandwich structure is one of hyperbolic curved surface, hyperbolic arch surface and hyperbolic elliptical surface;
the cross sections of the arc-shaped core frame and the wavy arc-shaped rod piece are identical in shape and size;
the star-shaped angle comprises a first connecting clamping groove and flanges arranged on two sides of the first connecting clamping groove; the wave angle comprises a second connecting clamping groove and flanges arranged on two sides of the second connecting clamping groove, and the opening direction of the first connecting clamping groove on the star angle is opposite to the opening direction of the second connecting clamping groove on the wave angle;
the polygonal shape of the arc-shaped core frame is formed by a continuous connection mode that the vertex angle of one star angle protrudes outwards, and the vertex angle of the adjacent star angle protrudes inwards, so that a wavy arc-shaped structure is integrally formed, and all angles are completely consistent; the arc-shaped core frame is in a flat state in an unconnected state, is in a wavy fluctuation state as a whole, and has all wave angles which are identical and consistent with the angles of star angles;
star angles of adjacent arc-shaped core frames correspond to the joint of two star angles of the previous arc-shaped core frame, so that the star angles of the two adjacent arc-shaped core frames after being placed are staggered;
the interval distance between the arc-shaped core frames corresponds to the interval distance of the wave angle vertex angles on the radial rod pieces.
2. A method of making the hyperbolic lattice sandwich structure of claim 1, comprising:
cutting out an arc-shaped core frame with a plurality of symmetrical star angles and a wave-shaped arc-shaped rod piece with a plurality of wave angles, which are orthogonal to the star angles on the arc-shaped core frame, according to the shape and the size of a curved surface to be assembled, wherein a first connecting clamping groove is formed on the same side of the corresponding vertex angle of each two adjacent star angles, and a second connecting clamping groove corresponding to the first connecting clamping groove is formed on the corresponding vertex angle of each two adjacent wave angles;
preparing an assembly mold for stably placing the arc-shaped core frames, placing all the arc-shaped core frames on the assembly mold by taking the interval distance of the wave angles on the wave-shaped arc-shaped rod pieces as a standard, and respectively clamping the wave-shaped arc-shaped rod pieces in first connecting clamping grooves on the arc-shaped core frames to enable all the arc-shaped core frames to be connected together;
and (3) attaching the assembled core layer structure to the first curved plate and the second curved plate, filling brazing paint at the connecting position, and putting the core layer structure into a vacuum brazing furnace for integral welding to complete the preparation of the double-curved lattice sandwich structure.
3. The method of claim 2, wherein the cutting is laser cutting, wire cutting or water cutting.
4. The manufacturing method according to claim 2, wherein the assembling die comprises a supporting surface contacting with the ground and an arc concave surface having the same external dimension as the arc-shaped core frame, and an axial groove corresponding to the star-shaped apex angle shape is provided in the arc concave surface.
5. The manufacturing method according to claim 2, wherein the first curved plate and the second curved plate are integrally formed by stamping according to the size of the member, or are split into a plurality of pieces, and are respectively spliced on the outer surface of the arc-shaped core frame, and then are reformed into a whole by welding.
6. The manufacturing method according to claim 2, wherein the connecting members for connecting the first curved plate and the second curved plate are welded to both ends of the first curved plate and the second curved plate, respectively, after the installation.
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| JP3434254B2 (en) * | 1999-12-27 | 2003-08-04 | 侃 田代 | Space truss composite board |
| CN101708638B (en) * | 2009-11-30 | 2012-07-25 | 哈尔滨工业大学 | Assembly jig for preparing fiber reinforced pyramid dot matrix sandwich panel core |
| CN102358048B (en) * | 2011-08-03 | 2013-11-06 | 哈尔滨工业大学 | Preparation process for pyramid lattice sandwich structure |
| CN104015407B (en) * | 2014-05-13 | 2016-01-06 | 清华大学 | A kind of curved composite structures lattice structure and preparation method thereof |
| CN104260436A (en) * | 2014-10-10 | 2015-01-07 | 哈尔滨工业大学 | Metal pyramid type lattice sandwich plate and preparation method thereof |
| CN107234837B (en) * | 2017-05-18 | 2020-05-22 | 西安交通大学 | Corrugated lattice metal sandwich cylindrical shell and preparation method thereof |
| CN113427836B (en) * | 2021-06-17 | 2022-03-04 | 中国科学院力学研究所 | Three-dimensional developable curved surface self-adaptive lattice structure and preparation method thereof |
| CN113427850B (en) * | 2021-06-22 | 2023-02-10 | 哈尔滨工程大学 | Simply-assembled pyramid lattice sandwich structure and preparation method thereof |
| CN113685715B (en) * | 2021-08-23 | 2022-04-29 | 哈尔滨工程大学 | Lattice core structure and cutting interlocking preparation method adopted by same |
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