CN113459604A - Light-weight high-vibration-resistance energy-absorption explosion-proof composite structure - Google Patents
Light-weight high-vibration-resistance energy-absorption explosion-proof composite structure Download PDFInfo
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- CN113459604A CN113459604A CN202110639983.3A CN202110639983A CN113459604A CN 113459604 A CN113459604 A CN 113459604A CN 202110639983 A CN202110639983 A CN 202110639983A CN 113459604 A CN113459604 A CN 113459604A
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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
- B32B9/00—Layered products comprising a layer of a particular substance not covered by groups B32B11/00 - B32B29/00
- B32B9/005—Layered products comprising a layer of a particular substance not covered by groups B32B11/00 - B32B29/00 comprising one layer of ceramic material, e.g. porcelain, ceramic tile
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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
- B32B15/043—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 of metal
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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
- B32B15/18—Layered products comprising a layer of metal comprising iron or steel
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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
- B32B15/20—Layered products comprising a layer of metal comprising aluminium or copper
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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
- B32B3/10—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 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 form; Layered products having particular features of form characterised by a discontinuous layer, i.e. formed of separate pieces of material characterised by a layer of regularly- arranged cells, e.g. a honeycomb structure
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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
- B32B9/00—Layered products comprising a layer of a particular substance not covered by groups B32B11/00 - B32B29/00
- B32B9/04—Layered products comprising a layer of a particular substance not covered by groups B32B11/00 - B32B29/00 comprising such particular substance as the main or only constituent of a layer, which is next to another layer of the same or of a different material
- B32B9/041—Layered products comprising a layer of a particular substance not covered by groups B32B11/00 - B32B29/00 comprising such particular 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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- 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
- B32B2307/50—Properties of the layers or laminate having particular mechanical properties
- B32B2307/558—Impact strength, toughness
Abstract
The invention provides a lightweight high-energy-absorption explosion-proof composite structure which comprises an upper plate, a lower plate and a honeycomb core body positioned between the upper plate and the lower plate, wherein the honeycomb core body is formed by an inward concave honeycomb structure and a regular hexagonal honeycomb structure. The invention has light weight, high specific strength, high energy absorption efficiency and stronger multifunctional comprehensive performance; compared with the traditional honeycomb structure, the multi-stage honeycomb structure core body provided by the invention has the advantages that the mechanical property, the mechanical strength, the energy absorption efficiency, the impact resistance and other various properties are obviously improved.
Description
Technical Field
The invention relates to the field of explosion-proof structures, in particular to a light-weight high-energy-absorption explosion-proof composite structure.
Background
The existing explosion-proof structure can achieve the aim of light weight while applying a plurality of honeycomb structures for explosion-proof energy absorption, and has the advantages of light weight, high specific strength, high energy absorption efficiency, strong multifunctional comprehensive performance and the like. Compared with a concave honeycomb structure, the traditional regular hexagonal honeycomb structure has higher rigidity, but has poorer energy absorption performance. The concave honeycomb structure is transversely contracted when being subjected to uniaxial compression, and shows a negative Poisson ratio effect, so that the concave honeycomb structure has more advantages in energy absorption, fracture resistance, indentation resistance and the like compared with the conventional material or structure. However, the existing concave-type negative poisson ratio honeycomb structure has certain defects, as the structure is simple, larger gaps exist in the structure units, the negative poisson ratio effect expressed by the structure is deformed by the guide of concave angles at two sides of the structure when the structure bears or resists pressure, the structure is deformed unstably due to the deformation, and the bearing energy absorption capacity of the structure is further reduced. Therefore, by combining the traditional hexagonal honeycomb structure and the concave honeycomb structure, the energy absorption performance of the honeycomb structure can be enhanced, and the strength of the honeycomb structure can be improved.
Meanwhile, a plurality of negative poisson ratio honeycomb structures are proposed by the predecessor, the structures range from a two-dimensional honeycomb structure to a three-dimensional negative poisson honeycomb structure, the structures range from simple to complex, the problem that the three-dimensional negative poisson ratio honeycomb structure is difficult to manufacture in practice exists due to the complexity of the structure, although the additive manufacturing technology can be used for manufacturing the complex honeycomb structure, the efficiency is still low, and therefore the simple two-dimensional honeycomb structure can be widely applied in practical life.
Disclosure of Invention
The invention aims to provide a light-weight high-energy-absorption explosion-proof composite structure. According to the technical scheme provided, the problem that the anti-explosion performance of the anti-explosion structure is poor in the prior art is solved.
According to the lightweight high-energy-absorption explosion-proof composite structure provided by the invention, the ceramic blocks bonded by the upper plate have excellent penetration resistance, and the honeycomb core body consisting of the concave negative Poisson ratio honeycomb structure units and the regular hexagonal honeycomb structure units has good low areal density, high impact resistance and energy absorption performance, so that the composite explosion-proof structure can resist explosion impact and has good penetration resistance.
The invention provides a light-weight high-energy-absorption explosion-proof composite structure, which comprises: the honeycomb core body comprises an upper plate, a lower plate and a honeycomb core body between the upper plate and the lower plate, wherein the honeycomb core body is composed of concave honeycomb units and regular hexagonal honeycomb structure units.
The invention provides a quantized high-energy-absorption explosion-proof composite structure, wherein a ceramic layer is bonded on the outer side of an upper plate and is uniformly arranged on the outer side of the upper plate, and the ceramic layer is made of a B4C ceramic material. .
The invention provides a lightweight high-energy-absorption explosion-proof composite structure.A honeycomb core body is formed by alternately arranging and arraying two units, namely an inward concave honeycomb unit and a regular hexagonal honeycomb unit, and axially stretching the units to form a three-dimensional honeycomb core body.
The invention provides a light-weight high-energy-absorption explosion-proof composite structure.
The invention provides a lightweight high-energy-absorption explosion-proof composite structure.A single core body of a honeycomb structure is added with vertical restraint at the edge;
the invention provides a lightweight high-energy-absorption explosion-proof composite structure, wherein a honeycomb core body unit is mainly controlled by three parameters of an angle alpha, a wall thickness t and a height h.
The invention provides a lightweight high-energy-absorption explosion-proof composite structure, which has a honeycomb sandwich structure with the wall thickness range: t is more than or equal to 2mm and less than or equal to 6mm, and the height range of the honeycomb unit is as follows: h is more than or equal to 16.0mm and less than or equal to 33.3mm, and the angle range is as follows: theta is more than or equal to 110 degrees and less than or equal to 130 degrees
According to the invention, the lightweight high-energy-absorption explosion-proof composite structure is provided, and the parameter relationship of the honeycomb units in the honeycomb structure is as follows: a √ 3h/2+ h/[2 · tan (θ -90 °) ]; b is h/[2 cos (θ -90 °).
The invention provides a lightweight high-energy-absorption explosion-proof composite structure, wherein the relative density of a three-dimensional honeycomb core body can be calculated by the following formula, and further the areal density of a honeycomb structure is controlled to achieve a lightweight result:
the invention provides a lightweight high-energy-absorption explosion-proof composite structure.
The invention provides a lightweight high-energy-absorption explosion-proof composite structure, wherein the upper plate, the lower plate and the honeycomb structure core body are made of metal materials such as 603 armored steel and the like.
According to the invention, the honeycomb core body is prepared by a traditional honeycomb structure processing method such as brazing and gluing, and can also be processed and formed by a water cutting method or a metal additive manufacturing method.
Compared with the prior art, the invention has the following remarkable advantages:
1. the invention has light weight, high specific strength, high energy absorption efficiency and stronger multifunctional comprehensive performance; 2. compared with the traditional honeycomb structure, the multi-stage honeycomb structure core body has the advantages that the mechanical property, the mechanical strength, the energy absorption efficiency, the impact resistance and other various properties are obviously improved in the plane (in the X-Y direction).
Drawings
Fig. 1 is an overall schematic view of a lightweight high-vibration-resistance energy-absorption lightweight high-energy-absorption explosion-proof composite structure according to the invention.
FIG. 2 is a schematic cross-sectional view of the composite structure of the present invention with light weight, high vibration resistance, energy absorption, light weight, high energy absorption, and explosion protection.
Fig. 3 is a schematic view of a honeycomb core with an internal concave honeycomb cell structure and a regular hexagonal honeycomb cell structure with an internal cross structure.
Fig. 4 is a diagram of a honeycomb core formed by a concave honeycomb unit structure and regular hexagonal honeycomb units with a cross structure added inside.
Detailed Description
The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be obtained by a person skilled in the art without any inventive step based on the embodiments of the present invention, are within the scope of the present invention.
The invention provides a lightweight high-energy-absorption explosion-proof composite structure which is described by combining with figures 1-2, and comprises an upper plate surface ceramic layer 1, an upper plate 2, a lower plate 4 and a honeycomb structure core body 3 positioned between the upper plate and the lower plate, wherein the surface ceramic layer 1 plays a role in resisting penetration of bullets and shrapnels, and the honeycomb structure of the core body has good low surface density and high impact-resistance energy absorption effects.
The materials of the upper plate and the lower plate in the lightweight high-energy-absorption explosion-proof composite structure can be selected from metal aluminum, aluminum alloy thin plates, stainless steel thin plates, copper plates and other materials, the core body has the largest influence on the performance of the lightweight high-energy-absorption explosion-proof composite structure, the core body is selected from aluminum alloy or steel and the like, and the ceramic layer 1 on the upper plate is adhered to the surface of the upper plate.
The honeycomb structure core 3 is a concave negative Poisson ratio honeycomb unit 5 structure and a regular hexagon honeycomb structure unit 6 with a cross structure added inside form a minimum unit of the honeycomb structure core, and the three-dimensional honeycomb structure core is formed by arraying and axially stretching. This kind of honeycomb core has reduced that the inside space is too big, and both sides reentrant angle warp unstability when receiving load simultaneously leads to the poor problem of energy-absorbing effect.
The concave-type negative poisson ratio honeycomb units 5 are specifically concave-type hexagonal honeycomb units, and common honeycomb structures are generally divided into regular quadrangle, regular hexagon and concave hexagon honeycombs. The effect of the concave hexagonal honeycomb structure on the absorption of explosion energy and the reduction of explosion shock waves is obviously better than that of a regular quadrilateral honeycomb structure and a regular hexagonal honeycomb structure.
The specific parameters of the honeycomb unit are as follows: α 120 °, t 2mm, and h 27.7 mm.
The regular hexagon honeycomb structure units 6 with the cross structures are added inside, the gap of the whole structure is reduced to be overlarge, meanwhile, the stability of the concave negative Poisson ratio honeycomb units 5 can be enhanced due to the fact that the regular hexagon honeycomb structure units are located on two sides of the concave negative Poisson ratio honeycomb units 5, and the shock resistance and the energy absorption performance of the whole structure are further improved.
The honeycomb structure core 3 is a multilayer honeycomb structure core formed by arranging inner concave negative Poisson ratio honeycomb units 5 and regular hexagonal honeycomb structure units with a cross structure in the vertical direction after being aligned in the horizontal direction.
The honeycomb structure core 3 can add fillers in the inner space of the honeycomb structure core unit to enhance the shock resistance and the anti-explosion performance of the honeycomb structure core.
The composite honeycomb structural unit absorbs energy and deforms under the pressure of 5 Mpa.
| Energy absorption ratio (mJ/kg) | Maximum displacement (mm) | Maximum stress (MPa) | Maximum stress at the bottom (MPa) |
| 35 | 0.16 | 419.1 | 248,1 |
Comparative example 1
When the core 3 has only honeycomb cells
The regular hexagon honeycomb structural unit absorbs energy and deforms under the pressure of 5MPa, alpha is 60 degrees, t is 2mm, and h is 22.7mm
| Energy absorption ratio (mJ/kg) | Maximum displacement (mm) | Maximum stress (MPa) | Maximum stress at the bottom (MPa) |
| 27.1 | 0.13 | 321.7 | 240.9 |
Comparative example 2
When the core 3 has only the concave-type negative poisson ratio honeycomb
The inward concave honeycomb structural unit absorbs energy and deforms under the pressure of 5Mpa, the material is structural steel, alpha is 120 degrees, t is 2mm, and h is 22.7mm
| Energy absorption ratio (mJ/kg) | Maximum displacement (mm) | Maximum stress (MPa) | Maximum stress at the bottom (MPa) |
| 55.7 | 0.18 | 542.2 | 80 |
Under the pressure of 5MPa, the maximum displacement of the composite honeycomb structure unit is smaller than that of the regular hexagonal unit, the rigidity is improved, and meanwhile, the composite honeycomb structure unit has larger energy absorption than that of the regular hexagonal unit, so that the composite honeycomb structure combined with the concave structure has more excellent energy absorption performance.
The existing explosion-proof structure is designed to be the most typical sandwich structure consisting of a ceramic, fiber reinforced composite material core layer and a metal panel, the ceramic and fiber reinforced composite material is considered to be capable of resisting penetration of high-speed fragments, and the metal panel is mainly used for resisting damage of shock waves. Research shows that a pure negative poisson ratio honeycomb structure is difficult to show the negative poisson ratio effect of the structure under the action of facing high-speed penetration. Therefore, in order to meet the actual requirements, the light-weight high-vibration-resistance energy-absorption light-weight high-energy-absorption explosion-proof composite structure which is wide in application range, good in energy-absorption effect, better in impact deformation resistance and penetration resistance is designed, and important theoretical and application significance is achieved.
Finally, it should be noted that: the above examples are only intended to illustrate the technical solution of the present invention, but not to limit it; although the present invention has been described in detail with reference to the foregoing embodiments, it will be understood by those of ordinary skill in the art that: the technical solutions described in the foregoing embodiments may still be modified, or some technical features may be equivalently replaced; and such modifications or substitutions do not depart from the spirit and scope of the corresponding technical solutions of the embodiments of the present invention.
Claims (8)
1. The utility model provides an explosion-proof composite construction of high energy-absorbing of lightweight, its characterized in that, it includes: the honeycomb core comprises an inner concave honeycomb unit and a regular hexagonal honeycomb structure unit which are alternately arranged and arrayed.
2. The composite structure of claim 1, wherein the ceramic layer is uniformly arranged on the outer side of the upper plate and is B4C, ceramic material.
3. The composite structure is characterized in that a cross structure is arranged inside the regular hexagonal honeycomb structural unit.
4. The composite structure of claim 1, wherein the honeycomb monocoque body of the composite structure is provided with vertical restraints at its edges.
5. The composite structure is characterized in that the honeycomb core unit is controlled by three parameters of an angle alpha, a wall thickness t and a height h, wherein t is more than or equal to 2mm and less than or equal to 6mm, and the height range of the honeycomb unit is as follows: h is more than or equal to 16.0mm and less than or equal to 33.3mm, and the angle range is as follows: alpha is more than or equal to 110 degrees and less than or equal to 130 degrees.
6. The composite structure of claim 5, wherein the relative density of the three-dimensional honeycomb core is calculated according to the following formula, and the areal density of the honeycomb structure is controlled to achieve a lightweight result:
7. the composite structure of claim 1, wherein the honeycomb core is at least two layers.
8. The composite structure of claim 1, wherein the honeycomb core, the upper plate and the lower plate are made of 603 armor steel.
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| CN202110639983.3A CN113459604A (en) | 2021-06-08 | 2021-06-08 | Light-weight high-vibration-resistance energy-absorption explosion-proof composite structure |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114750469A (en) * | 2022-03-28 | 2022-07-15 | 广东亚太新材料科技有限公司 | Anti-elastic composite material containing negative Poisson's ratio ceramic structure and preparation method |
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| CN110525628A (en) * | 2019-07-23 | 2019-12-03 | 北京交通大学 | A kind of novel born of the same parents' lattice cellular cushion device improving multidirectional carrying energy absorbing efficiency |
| CN112140640A (en) * | 2019-06-27 | 2020-12-29 | 中南林业科技大学 | Honeycomb bionic core plate with folded groove openings and manufacturing method thereof |
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2021
- 2021-06-08 CN CN202110639983.3A patent/CN113459604A/en active Pending
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN204592130U (en) * | 2015-03-31 | 2015-08-26 | 华南理工大学 | A kind of buffering energy-absorbing structure |
| CN108791113A (en) * | 2018-06-14 | 2018-11-13 | 吉林大学 | Highly integrated all-in-one car ceiling with low peak endergonic structure |
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| CN112140640A (en) * | 2019-06-27 | 2020-12-29 | 中南林业科技大学 | Honeycomb bionic core plate with folded groove openings and manufacturing method thereof |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN114750469A (en) * | 2022-03-28 | 2022-07-15 | 广东亚太新材料科技有限公司 | Anti-elastic composite material containing negative Poisson's ratio ceramic structure and preparation method |
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