CN111300943A - Thick-wall honeycomb sandwich structure and method - Google Patents
Thick-wall honeycomb sandwich structure and method Download PDFInfo
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- CN111300943A CN111300943A CN202010219419.1A CN202010219419A CN111300943A CN 111300943 A CN111300943 A CN 111300943A CN 202010219419 A CN202010219419 A CN 202010219419A CN 111300943 A CN111300943 A CN 111300943A
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- honeycomb
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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
- B32B27/00—Layered products comprising a layer of synthetic resin
- B32B27/36—Layered products comprising a layer of synthetic resin comprising polyesters
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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
- B32B27/00—Layered products comprising a layer of synthetic resin
- B32B27/12—Layered products comprising a layer of synthetic resin next to a fibrous or filamentary layer
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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
- B32B37/00—Methods or apparatus for laminating, e.g. by curing or by ultrasonic bonding
- B32B37/12—Methods or apparatus for laminating, e.g. by curing or by ultrasonic bonding characterised by using adhesives
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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
- B32B37/00—Methods or apparatus for laminating, e.g. by curing or by ultrasonic bonding
- B32B37/14—Methods or apparatus for laminating, e.g. by curing or by ultrasonic bonding characterised by the properties of the layers
- B32B37/146—Methods or apparatus for laminating, e.g. by curing or by ultrasonic bonding characterised by the properties of the layers whereby one or more of the layers is 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
- B32B38/00—Ancillary operations in connection with laminating processes
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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
- B32B5/00—Layered products characterised by the non- homogeneity or physical structure, i.e. comprising a fibrous, filamentary, particulate or foam layer; Layered products characterised by having a layer differing constitutionally or physically in different parts
- B32B5/02—Layered products characterised by the non- homogeneity or physical structure, i.e. comprising a fibrous, filamentary, particulate or foam layer; Layered products characterised by having a layer differing constitutionally or physically in different parts characterised by structural features of a fibrous or filamentary layer
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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
- B32B7/00—Layered products characterised by the relation between layers; Layered products characterised by the relative orientation of features between layers, or by the relative values of a measurable parameter between layers, i.e. products comprising layers having different physical, chemical or physicochemical properties; Layered products characterised by the interconnection of layers
- B32B7/04—Interconnection of layers
- B32B7/12—Interconnection of layers using interposed adhesives or interposed materials with bonding properties
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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
- B32B37/00—Methods or apparatus for laminating, e.g. by curing or by ultrasonic bonding
- B32B37/12—Methods or apparatus for laminating, e.g. by curing or by ultrasonic bonding characterised by using adhesives
- B32B2037/1253—Methods or apparatus for laminating, e.g. by curing or by ultrasonic bonding characterised by using adhesives curable adhesive
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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
- B32B38/00—Ancillary operations in connection with laminating processes
- B32B2038/0052—Other operations not otherwise provided for
- B32B2038/0076—Curing, vulcanising, cross-linking
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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
- B32B2262/00—Composition or structural features of fibres which form a fibrous or filamentary layer or are present as additives
- B32B2262/10—Inorganic fibres
- B32B2262/101—Glass fibres
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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
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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
- B32B2307/546—Flexural strength; Flexion stiffness
Abstract
The invention relates to a thick-wall honeycomb sandwich structure and a method, belonging to the field of structural materials; the laminated plate comprises outer plates and a middle interlayer, wherein the middle interlayer is fixed between the two outer plates through an adhesive; the outer plate is a composite material panel, and the middle interlayer comprises a honeycomb core and an energy-absorbing wall plate; the honeycomb core is composed of a plurality of honeycomb unit cells with regular hexagonal structures with equal wall thickness, and the wall thickness/wall length of each honeycomb unit cell is more than 0.02; the energy-absorbing wall plates are fixed on the periphery of the honeycomb core and between the two outer layer plates. The whole compression resistance and bending resistance of the honeycomb sandwich structure are enhanced, and meanwhile, the peripheral wall plate is in an energy absorption state in the process of releasing the energy of the core layer part, so that the bearing capacity of the whole sandwich structure is further improved.
Description
Technical Field
The invention belongs to the field of structural materials, and particularly relates to a thick-wall honeycomb sandwich structure and a method.
Background
The honeycomb sandwich structure gradually replaces partial wooden materials and metal materials with excellent mechanical properties and multifunctional energy consumption potential (such as noise elimination, heat insulation, microwave absorption and the like), and is widely applied to the fields of aerospace, transportation, ocean engineering, bionic structures and the like. At present, scholars at home and abroad have conducted a lot of researches on honeycomb sandwich structures, wherein the researches are conducted on mechanical property testing and research of the sandwich structures, and on numerical analysis and theoretical research, great research results are obtained.
In patent CN103991247, "a honeycomb plate with a hollow, light honeycomb-like bionic structure" is disclosed, the honeycomb core of the structure has not been changed significantly, and the face plate has not been enhanced significantly, so the bending resistance and pressure resistance have not been improved greatly. Moreover, most of the research at present aims at the thin-wall honeycomb sandwich structure, few researches are carried out on the thick-wall honeycomb sandwich structure, and the thick-wall honeycomb has outstanding application in the sealing field, so that the method has important engineering significance on the research on the thick-wall honeycomb and the thick-wall honeycomb sandwich structure.
Disclosure of Invention
The technical problem to be solved is as follows:
in order to avoid the defects of the prior art, the invention provides a thick-wall honeycomb sandwich structure and a method, which adopt a honeycomb core structure with a regular hexagon structure, and enhance the compression resistance and the bending resistance of the structure by limiting the structural proportion of the honeycomb core.
The technical scheme of the invention is as follows: a thick-wall honeycomb sandwich structure comprises outer plates and a middle interlayer, wherein the middle interlayer is fixed between the two outer plates through an adhesive; the method is characterized in that: the outer plate is a composite material panel, and the middle interlayer comprises a honeycomb core and an energy-absorbing wall plate; the honeycomb core is composed of a plurality of honeycomb unit cells with regular hexagonal structures with equal wall thickness, and the wall thickness/wall length of each honeycomb unit cell is more than 0.02; the energy-absorbing wall plates are fixed on the periphery of the honeycomb core and between the two outer layer plates.
The further technical scheme of the invention is as follows: the composite material panel is a glass fiber reinforced composite material.
The further technical scheme of the invention is as follows: the adhesive is a bi-component epoxy resin adhesive.
The further technical scheme of the invention is as follows: the honeycomb core and the energy-absorbing wall plate are both made of PLA polylactic acid.
The further technical scheme of the invention is as follows: the relative density of the honeycomb core is 21%, the wall thickness of the honeycomb unit cell is 2mm, the wall length is 6mm, and the wall thickness of the energy-absorbing wall plate is 1 mm.
The preparation method of the thick-wall honeycomb sandwich structure is characterized by comprising the following specific steps:
the method comprises the following steps: preparing the honeycomb core by adopting a 3D printing technology;
step two: uniformly coating the adhesive on one side surface of one composite material panel, aligning and adhering one side of the honeycomb core with the composite material panel, and curing at 25 ℃ for 24 hours;
step three: and (3) uniformly coating the adhesive on one side surface of the other composite material panel, aligning and adhering the other side of the honeycomb core cured in the step (II) with the other composite material panel, and curing at 25 ℃ for 24 hours to obtain the thick-wall honeycomb sandwich structure.
The further technical scheme of the invention is as follows: the 3D printing technique is an FDM fused deposition technique.
Advantageous effects
The invention has the beneficial effects that: for the honeycomb sandwich structure, the compression resistance and the bending resistance of the honeycomb sandwich structure are respectively determined by the compression resistance and the out-of-plane shearing resistance of the honeycomb core, and the performance of the honeycomb core is determined by the wall thickness/the wall length and is in positive correlation. When the wall thickness/the wall length of the core is increased, the compression resistance and the out-of-plane shearing resistance of the core are enhanced, the integral compression resistance and bending resistance of the honeycomb sandwich structure are also enhanced, and meanwhile, the peripheral wall plate is in an energy absorption state in the process of releasing the energy of the core layer part, so that the bearing capacity of the whole sandwich structure is further improved.
The invention provides a thick-wall honeycomb sandwich structure which consists of a composite material panel and a thick-wall honeycomb core; the inner surface of the composite material panel is connected with two ends of the thick-wall honeycomb core through gluing, the composite material panel is used for directly bearing external load, and the thick-wall honeycomb core is used for transferring the load; the thick-wall honeycomb core is prepared by adopting a 3D printing technology, a plurality of regular hexagonal thick-wall honeycomb unit cells are periodically arranged, the wall thicknesses are equal, and the wall thickness/wall length of the honeycomb unit cell is set to be more than 0.02. Compared with the common double-wall honeycomb sandwich structure, the thick-wall honeycomb sandwich structure has better compression resistance and bending resistance under the condition of the same relative density, wherein the flat compression strength and the bending strength of the double-wall honeycomb sandwich structure are respectively 11.61MPa and 94.52MPa, and the flat compression strength and the bending strength of the thick-wall honeycomb sandwich structure are respectively 19.27MPa and 116.45 MPa.
Drawings
FIG. 1 is a schematic view of a thick-walled honeycomb sandwich structure of the present invention;
FIG. 2 is a diagram of a process for manufacturing a thick-walled honeycomb core according to the present invention;
FIG. 3 is a diagram of a thick-walled honeycomb core of the present invention.
Detailed Description
The embodiments described below with reference to the drawings are illustrative and intended to be illustrative of the invention and are not to be construed as limiting the invention.
This embodiment is a regular hexagon thick wall honeycomb sandwich structure.
The thick-wall honeycomb sandwich structure in the embodiment is composed of a composite material panel and a thick-wall honeycomb core; the inner surface of the composite material panel is connected with two ends of the thick-wall honeycomb core through an adhesive; the thick-wall honeycomb core is prepared by adopting a 3D printing technology, the raw material is PLA polylactic acid, a plurality of thick-wall honeycomb unit cells are periodically arranged, the unit cells are in a regular hexagon structure, and the wall thickness is equal; the composite material panel is a glass fiber reinforced composite material.
The relative density of the thick-walled honeycomb sandwich structure of the present example was 21%.
The thick-wall honeycomb sandwich structure of the embodiment is prepared and pasted: the method comprises the steps of adopting bi-component epoxy resin glue as an adhesive, uniformly coating the bi-component epoxy resin glue on one side of a glass fiber reinforced composite material panel, aligning and adhering a thick-wall regular hexagonal honeycomb core and the panel, and curing under the curing condition of 25 ℃ plus 24 hours. In order to prevent the adhesive from flowing along the height direction of the core layer in the curing process, one side needs to be adhered, and then the other side needs to be adhered.
In the prior art, the core structure respectively adopts an equal-wall triangle, an equal-wall quadrangle and a double-vertical-wall hexagon, and other embodiments are the same to obtain the thick-wall honeycomb sandwich structure with four core configurations.
The plane compression performance and the three-point bending performance of the thick-wall honeycomb sandwich structure of the embodiment and the prior art are tested, wherein the plane compression performance test is in accordance with GB/T1453-. The specific comparison results are shown in table 1.
TABLE 1 Strength and other Property parameters of four core-structured Thick-walled Honeycomb Sandwich Structure
As can be seen from table 1, the thick-walled honeycomb sandwich structure having the core structure of an equi-walled regular hexagon has the highest flat crushing strength and bending strength at a relative density of 21%.
In summary, in the thick-walled honeycomb sandwich structure proposed by the present invention, the equal-wall regular hexagons as the core configuration provide higher compressive and bending resistance of the whole sandwich structure under the condition of the same relative density.
Although embodiments of the present invention have been shown and described above, it is understood that the above embodiments are exemplary and should not be construed as limiting the present invention, and that variations, modifications, substitutions and alterations can be made in the above embodiments by those of ordinary skill in the art without departing from the principle and spirit of the present invention.
Claims (7)
1. A thick-wall honeycomb sandwich structure comprises outer plates and a middle interlayer, wherein the middle interlayer is fixed between the two outer plates through an adhesive; the method is characterized in that: the outer plate is a composite material panel, and the middle interlayer comprises a honeycomb core and an energy-absorbing wall plate; the honeycomb core is composed of a plurality of honeycomb unit cells with regular hexagonal structures with equal wall thickness, and the wall thickness/wall length of each honeycomb unit cell is more than 0.02; the energy-absorbing wall plates are fixed on the periphery of the honeycomb core and between the two outer layer plates.
2. A thick-walled honeycomb sandwich structure according to claim 1, wherein: the composite material panel is a glass fiber reinforced composite material.
3. A thick-walled honeycomb sandwich structure according to claim 1, wherein: the adhesive is a bi-component epoxy resin adhesive.
4. A thick-walled honeycomb sandwich structure according to claim 1, wherein: the honeycomb core and the energy-absorbing wall plate are both made of PLA polylactic acid.
5. A thick-walled honeycomb sandwich structure according to claim 1, wherein: the relative density of the honeycomb core is 21%, the wall thickness of the honeycomb unit cell is 2mm, the wall length is 6mm, and the wall thickness of the energy-absorbing wall plate is 1 mm.
6. A method of making a thick-walled honeycomb sandwich structure according to claim 1, characterized by the specific steps of:
the method comprises the following steps: preparing the honeycomb core by adopting a 3D printing technology;
step two: uniformly coating the adhesive on one side surface of one composite material panel, aligning and adhering one side of the honeycomb core with the composite material panel, and curing at 25 ℃ for 24 hours;
step three: and (3) uniformly coating the adhesive on one side surface of the other composite material panel, aligning and adhering the other side of the honeycomb core cured in the step (II) with the other composite material panel, and curing at 25 ℃ for 24 hours to obtain the thick-wall honeycomb sandwich structure.
7. A method of making the thick-walled honeycomb sandwich structure of claim 1, according to claim 6, wherein: the 3D printing technique is an FDM fused deposition technique.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010219419.1A CN111300943A (en) | 2020-03-25 | 2020-03-25 | Thick-wall honeycomb sandwich structure and method |
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| Application Number | Priority Date | Filing Date | Title |
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| CN202010219419.1A CN111300943A (en) | 2020-03-25 | 2020-03-25 | Thick-wall honeycomb sandwich structure and method |
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| CN202010219419.1A Pending CN111300943A (en) | 2020-03-25 | 2020-03-25 | Thick-wall honeycomb sandwich structure and method |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2023051031A1 (en) * | 2021-09-28 | 2023-04-06 | 大连理工大学 | Continuous fibre multi-layer honeycomb sandwich plate, and integrated forming method therefor |
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| CN109094139A (en) * | 2018-08-08 | 2018-12-28 | 西北工业大学 | A kind of new configuration honeycomb sandwich panel |
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| CN109501397A (en) * | 2018-11-20 | 2019-03-22 | 华侨大学 | A kind of cellular composite material |
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| CN110372375A (en) * | 2019-08-01 | 2019-10-25 | 上海应用技术大学 | Honeycomb sandwich construction ceramics and preparation method based on 3D printing technique |
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2020
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
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| WO2023051031A1 (en) * | 2021-09-28 | 2023-04-06 | 大连理工大学 | Continuous fibre multi-layer honeycomb sandwich plate, and integrated forming method therefor |
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