CN109624449B - Shock-resistant curved bar lattice sandwich plate structure - Google Patents
Shock-resistant curved bar lattice sandwich plate structure Download PDFInfo
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- CN109624449B CN109624449B CN201910022162.8A CN201910022162A CN109624449B CN 109624449 B CN109624449 B CN 109624449B CN 201910022162 A CN201910022162 A CN 201910022162A CN 109624449 B CN109624449 B CN 109624449B
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- B—PERFORMING OPERATIONS; TRANSPORTING
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- B—PERFORMING OPERATIONS; TRANSPORTING
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- B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
- B32B13/00—Layered products comprising a a layer of water-setting substance, e.g. concrete, plaster, asbestos cement, or like builders' material
- B32B13/04—Layered products comprising a a layer of water-setting substance, e.g. concrete, plaster, asbestos cement, or like builders' material comprising such water setting substance as the main or only constituent of a layer, which is next to another layer of the same or of a different material
- B32B13/06—Layered products comprising a a layer of water-setting substance, e.g. concrete, plaster, asbestos cement, or like builders' material comprising such water setting substance as the main or only constituent of a layer, which is next to another layer of the same or of a different material of metal
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- B32B15/01—Layered products comprising a layer of metal all layers being exclusively metallic
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Abstract
The invention discloses an impact-resistant curved bar lattice sandwich plate structure, which is characterized in that a curved bar lattice structure is combined with a sandwich plate structure to obtain a sandwich plate structure with light weight, high strength and strong impact resistance. The structure comprises last dash board, lower dash board, curved bar lattice structure sandwich layer is prolonged in the space by single curved bar substructure and forms, and single curved bar substructure is crossed by the equal angle of the curved bar that a plurality of shape is the same, and this curved bar lattice structure light weight is high-strength, has good deformability and energy-absorbing efficiency under the impact load effect, has better bending stiffness and shock resistance with the sandwich plate structure combination, has wide application prospect in fields such as aerospace, civil engineering, machine-building and manufacturing.
Description
Technical Field
The invention relates to a sandwich plate structure, in particular to an impact-resistant curved bar lattice sandwich plate structure.
Background
The sandwich plate structure is a composite structure of plate and shell, its two surfaces are made of very thin plate material, and its middle is sandwiched by light sandwich layer. The former is called a panel, and is required to have high strength; the latter, called a sandwich, requires a light weight. Generally, the strength of a sandwich structure material is higher than the rigidity and the strength of a single panel material or a core material, the weight, the cost and the like of the sandwich structure material are lower than those of a single material, and the sandwich structure material has excellent specific rigidity and specific strength, so that the sandwich structure material is widely applied to the fields of buildings, road transportation, rail transit, aviation, transmission, wind power and the like.
The sandwich layer mainly has the main functions of maintaining the distance between the upper and lower surface plates and increasing the inertia moment and the bending rigidity of the upper and lower surface plates, the traditional sandwich structure material sandwich layer mainly comprises three types of hard foam, honeycomb and balsa wood, the void ratio of the three types is small, the mass of the sandwich layer is large, and the sandwich layer has poor deformation capacity and low energy absorption efficiency under the action of local impact load. In order to solve the problems, the invention of the sandwich structure with high porosity, high deformation capacity and energy absorption efficiency, light weight and high strength is necessary.
The space lattice structure material is a novel light high-strength material, has larger void ratio, has higher specific rigidity and specific strength than the traditional foam material and honeycomb material, has excellent anti-deformation capability and energy absorption efficiency, and can greatly reduce the weight of a core layer, so that the space lattice structure can be used as the core layer structure to develop a light high-strength impact-resistant sandwich plate structure.
When the traditional straight rod space lattice structure receives impact, the straight rod can generate larger impact stress in the bending process, and the straight rod can generate Euler buckling in the deformation process, so that the stress performance of the structure can be greatly weakened. Compared with a straight rod space lattice structure, the curved rod lattice structure can generate relatively small impact force peak values in the stress process, and can play a good role in protecting the protected object.
Disclosure of Invention
The technical problem is as follows: in order to solve the problems, the invention discloses a sandwich plate structure with a curved bar lattice structure as a sandwich layer, which can effectively reduce the stress peak value generated in the impact process, effectively reduce the weight of the sandwich plate structure and improve the deformation capacity and energy absorption efficiency of the sandwich plate structure, thereby obtaining the sandwich plate structure with good impact resistance.
The technical scheme is as follows: in order to achieve the purpose, the technical scheme of the invention is as follows:
the utility model provides a curved bar dot matrix sandwich panel structure shocks resistance which characterized in that: it includes dash board, lower dash board and curved bar lattice structure sandwich layer, curved bar lattice structure sandwich layer is extended in the space by single curved bar substructure and forms, single curved bar substructure is crossed by the equal angle of the curved bar that a plurality of shape is the same and is formed to realize that curved bar lattice structure supports upper and lower dash board as the structural layer, guaranteed the rigidity and the intensity of intermediate layer plate structure, and under the impact load effect, main shear stress is undertaken to curved bar lattice structure sandwich layer, falls impact energy through self good deformability and energy-absorbing efficiency dissipation, reaches the purpose of shocking resistance.
Alternatively, the skin material may be a metal, non-metal or composite material, such as glass reinforced plastic, plastic sheet, plywood.
Optionally, the curved bar lattice structure core layer is formed by a single layer or multiple layers of curved bar lattice structure layers.
Optionally, the planar projection of the curved bar lattice structure core layer may be in a grid type, a honeycomb type or a triangular type.
Alternatively, the planar projection of the single curved bar substructure may be a regular quadrangle, a regular hexagon, or a regular triangle.
Optionally, the curved bar unit line shape in the single curved bar substructure may be a circular arc, a parabola or a catenary.
Optionally, the material of the curved bar unit in the single curved bar substructure is metal, nonmetal or composite material.
Alternatively, the void portion of the core layer may be filled with a foamed metal, a foamed concrete, or a foamed plastic.
Has the advantages that: compared with other prior art, the invention has the following advantages:
(1) according to the invention, the good bending resistance of the sandwich plate structure and the good deformation capacity and energy absorption efficiency of the curved bar lattice structure are integrated, when the upper and lower surface plates are subjected to bending deformation under the action of impact load, the curved bar lattice structure bears main shearing force, and the impact energy is dissipated through the bending deformation of the curved bar lattice structure along the curvature direction, so that the stress peak value generated in the impact process can be effectively reduced, and the purposes of shock absorption and impact resistance are achieved. Compared with the traditional sandwich plate core layers such as foam and honeycomb, the porosity of the core layer of the curved bar lattice structure is greatly improved, so that the weight of the core layer is greatly reduced, and the sandwich plate structure with light weight, high strength and more excellent impact resistance is obtained.
(2) The sandwich plate surface plate can be made of composite plates, and foam materials such as foam metal, foam concrete, foam plastic and the like can be filled in gaps of a core layer of a curved bar lattice structure, so that additional functions of noise and vibration reduction, heat insulation, flame retardance and the like are realized.
Drawings
FIG. 1 is a schematic view of the whole structure of a four-layer grid type impact-resistant curved bar lattice sandwich panel according to the present invention;
FIG. 2 is a schematic diagram of the extension of a four-layer lattice type impact-resistant curved bar lattice sandwich plate structure substructure of the present invention in the Z direction;
FIG. 3 is a schematic view of a projection of a core layer of a four-layer grid type impact-resistant curved bar lattice sandwich plate structure in an XY plane according to the present invention;
FIG. 4 is a schematic view of the whole structure of a single-layer honeycomb impact-resistant curved bar lattice sandwich panel according to the present invention;
FIG. 5 is a schematic structural diagram of a single-layer honeycomb type impact-resistant curved bar lattice sandwich plate structure of the present invention;
FIG. 6 is a schematic view of a projection of a core layer of the single-layer honeycomb impact-resistant curved bar lattice sandwich plate structure of the present invention in an XY plane;
FIG. 7 is a general schematic view of a double-layer triangular impact-resistant curved bar lattice sandwich plate structure of the present invention;
FIG. 8 is a schematic diagram of the extension of the double-layer triangular impact-resistant curved bar lattice sandwich plate structure substructure of the present invention in the Z direction;
fig. 9 is a schematic projection diagram of a double-layer triangular impact-resistant curved bar lattice sandwich plate structure core layer in an XY plane.
FIG. 10 is an overall schematic view of a foam aluminum filled double-layer triangular shock-resistant curved bar lattice sandwich plate structure of the present invention.
Among them are: the composite plate comprises an upper surface plate 1, a lower surface plate 2, a curved bar lattice structure core layer 3, a curved bar lattice structure substructure 4 and foamed aluminum filler 5.
Detailed Description
The invention is further described with reference to the following drawings and detailed description.
As shown in fig. 1, an impact-resistant curved bar lattice sandwich plate structure is composed of an upper plate 1, a lower plate 2 and a curved bar lattice structure core layer 3, wherein the upper plate 1 and the lower plate 2 of the sandwich plate structure can be made of metal, nonmetal or composite material, the curved bar lattice structure core layer 3 is used as a framework to support the upper plate and the lower plate, and is formed by extending a single curved bar substructure 4 in space. Fig. 2 shows a single curved bar substructure 4, which is formed by intersecting several curved bars with the same shape at equal angles, and fig. 3 shows a projection of a core structure on a surface plate. When the impact load acts, the core layer of the curved bar lattice structure bears the main shearing stress, the impact energy is dissipated through the good deformation capacity and the energy absorption efficiency of the core layer, and a smaller impact force peak value is generated, so that the aim of resisting impact is fulfilled.
Example 1: as shown in fig. 1 to 3, the four-layer grid type impact-resistant curved bar lattice sandwich plate structure is shown, an upper plate 1 and a lower plate 2 are made of glass fiber reinforced plastic, a single curved bar structure 4 adopts a regular quadrilateral configuration, the material adopts glass fiber reinforced plastic, the regular quadrilateral single curved bar structure 4 is extended along the Z direction shown in fig. 2, then extended along the XY plane, and finally the four-layer grid type impact-resistant curved bar lattice sandwich plate structure core layer 3 is formed, and finally the formed four-layer grid type impact-resistant curved bar lattice sandwich plate structure core layer 3 is combined with the glass fiber reinforced plastic upper plate 1 and the lower surface plate 2 to form the four-layer grid type impact-resistant curved bar lattice sandwich plate structure. The four-layer grid type impact-resistant curved bar lattice sandwich plate structure core layer is used as a framework to support the upper and lower surface plates, so that the upper and lower surface plates have certain bending rigidity, when the impact load is borne, the grid type curved bar lattice structure core layer bears main shearing stress, impact energy is dissipated through good deformation capacity and energy absorption efficiency, a smaller impact force peak value is generated, and the aim of impact resistance is fulfilled.
Example 2: as shown in fig. 4-6, the single-layer honeycomb type impact-resistant curved bar lattice sandwich plate structure is formed by extending a single regular hexagonal curved bar structure 4 along an XY plane to form a single-layer honeycomb type curved bar lattice structure core layer 3, and then combining the formed single-layer honeycomb type curved bar lattice structure core layer 3 with the reinforced concrete upper surface plate 1 and the reinforced concrete lower surface plate 2 to form the single-layer honeycomb type impact-resistant curved bar lattice sandwich plate structure, wherein the upper surface plate 1 and the lower surface plate 2 are plates made of reinforced concrete, and the single-layer honeycomb type impact-resistant curved bar lattice sandwich plate structure is formed. The single-layer honeycomb type curved bar lattice structure core layer is used as a framework to support the upper and lower surface plates, so that the upper and lower surface plates have certain bending rigidity, when the impact load is borne, the honeycomb type curved bar lattice structure core layer bears main shearing stress, impact energy is dissipated through good deformation capacity and energy absorption efficiency, and a smaller impact force peak value is generated, so that the aim of impact resistance is fulfilled.
Example 3: fig. 7 to 9 show a double-layer triangular impact-resistant curved bar lattice sandwich plate structure, an upper surface plate (1) and a lower surface plate (2) are plates made of hard plastics, a single curved bar substructure 4 adopts a regular triangle configuration, the materials adopt hard plastics, the single curved bar substructure 4 of the regular triangle is firstly extended along the Z direction as shown in fig. 8 and then extended along the XY plane, a double-layer triangular impact-resistant curved bar lattice sandwich plate structure core layer 3 is finally formed, and the formed double-layer triangular impact-resistant curved bar lattice sandwich plate structure core layer 3 is combined with the hard plastic upper surface plate 1 and the lower surface plate 2 to form the double-layer triangular impact-resistant curved bar lattice sandwich plate structure. The sandwich layer of the double-layer triangular shock-resistant curved bar lattice sandwich plate structure is used as a framework to support the upper and lower surface plates, so that the upper and lower surface plates have certain bending rigidity, when the honeycomb curved bar lattice sandwich layer bears the impact load, the honeycomb curved bar lattice sandwich layer bears the main shearing stress, the impact energy is dissipated through the good deformation capacity and the energy absorption efficiency of the honeycomb curved bar lattice sandwich layer, and a smaller impact force peak value is generated, thereby achieving the shock resistance purpose.
Example 4: as shown in fig. 10, the double-layer lattice type impact-resistant curved bar lattice sandwich plate structure filled with foamed aluminum is shown, the upper plate 1 and the lower plate 2 are plates made of aluminum alloy, the curved bar structure 4 adopts a regular quadrilateral configuration, the material adopts aluminum alloy, and the double-layer lattice type curved bar lattice structure sandwich layer 3 is extended in space, so that the impact-resistant sandwich plate structure with light weight and high strength is obtained. And then the foamed aluminum filler is filled in the gaps of the core layer of the curved bar lattice structure, so that the sandwich plate structure has additional functions of noise reduction, vibration reduction, heat insulation, flame retardance and the like.
Claims (3)
1. The utility model provides a curved bar dot matrix sandwich panel structure shocks resistance which characterized in that: the bending bar lattice structure comprises an upper surface plate (1), a lower surface plate (2) and a bending bar lattice structure core layer (3) positioned between the upper surface plate (1) and the lower surface plate (2), wherein the upper surface plate (1) and the lower surface plate (2) bear bending load of the whole structure, the bending bar lattice structure core layer (3) is formed by extending a single bending bar substructure (4) in space, the single bending bar substructure (4) is formed by crossing a plurality of bending bars with the same shape at equal angles, and the bending bar lattice structure core layer (3) is used as a structural layer to connect and support the upper surface plate (1) and the lower surface plate (2) and bear main shearing stress; under the action of impact load, the curved bar lattice structure dissipates impact energy through good bending deformation capacity and energy absorption efficiency per se, and generates a smaller impact force peak value to achieve the aim of impact resistance;
the curved bar lattice structure core layer (3) is formed by a single-layer or multi-layer curved bar lattice structure layer;
the bent rod lattice structure core layer (3) is filled with foam metal, foam concrete or foam plastic (5) at the gap part;
the plane projection of the curved bar lattice structure core layer (3) is in a grid type, a honeycomb type or a triangular type;
the plane projection of the single curved rod substructure (4) is a regular quadrangle, a regular hexagon or a regular triangle;
in the single curved bar substructure (4), the curved bar unit line is a circular arc line, a parabola line or a catenary line.
2. The impact resistant curved bar lattice sandwich plate structure of claim 1, wherein: the upper surface plate (1) and the lower surface plate (2) are made of metal, nonmetal or composite materials.
3. The impact resistant curved bar lattice sandwich plate structure of claim 1, wherein: in the single curved bar substructure (4), the curved bar unit material is metal, nonmetal or composite material.
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| Application Number | Priority Date | Filing Date | Title |
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| CN201910022162.8A CN109624449B (en) | 2019-01-10 | 2019-01-10 | Shock-resistant curved bar lattice sandwich plate structure |
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| CN201910022162.8A CN109624449B (en) | 2019-01-10 | 2019-01-10 | Shock-resistant curved bar lattice sandwich plate structure |
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| CN109624449B true CN109624449B (en) | 2021-06-11 |
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| CN112112918B (en) * | 2020-09-19 | 2022-11-18 | 重庆大学 | Three-dimensional lattice structure of pole ization |
| CN113106794B (en) * | 2021-05-26 | 2022-02-01 | 中南大学 | Train derailing rotary anti-collision barrel, derailing collision energy-absorbing protection device and collision energy-absorbing method |
| CN115339170A (en) * | 2022-08-21 | 2022-11-15 | 重庆交通大学 | Close-packed hexagonal lattice sandwich structure |
| CN115961735A (en) * | 2022-12-08 | 2023-04-14 | 北京工业大学 | Dot matrix material based on arch structure |
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