Honeycomb interlayer with inscribed ellipses

Abstract

The utility model provides an inscribed oval honeycomb interlayer, and relates to the field of honeycomb interlayers. Comprising covering plates and a core layer, and the core layer is arranged between the two symmetrically arranged covering plates; the core layer comprises a plurality of unit cell bodies arranged in an array mode, each unit cell body comprises an internal structure and an external structure, the section of each internal structure is oval, and the section of each external structure is in a concave hexagon shape. According to the utility model, the energy absorption effect can be optimized, the external impact force can be dispersed, the impact resistance can be enhanced, the stability can be ensured, and the stress can be uniformly distributed when the structure is stressed.

Description

Technical Field

[0001] This utility model relates to the field of honeycomb sandwich technology, and in particular to a honeycomb sandwich with an inscribed ellipse. Background Technology

[0002] Sandwich panel structures are composite materials consisting of two high-strength surface panels and a lightweight core layer sandwiched between them. The most significant characteristics of this structure are its light weight, high strength, good rigidity, and excellent thermal and sound insulation properties. Due to its superior mechanical properties and good energy absorption characteristics, sandwich panels are widely used in aerospace, automotive, shipbuilding, construction, packaging, and transportation industries. Based on the material and structural form of the core layer, sandwich panels can be classified into different types, including foam sandwich panels, corrugated sandwich panels, and honeycomb sandwich panels.

[0003] The core layer is the core component of a sandwich panel. It not only connects the upper and lower surface panels but also determines the overall mechanical properties of the sandwich panel, especially its energy absorption and protection capabilities. In practical applications, the design of the core layer is crucial for improving the energy absorption efficiency of the sandwich panel. A well-designed core layer can effectively absorb the energy generated by external impacts, reduce structural deformation, and significantly enhance the load-bearing capacity of the sandwich panel.

[0004] In existing technologies, honeycomb sandwich panel structures are one of the most common sandwich panel designs, especially widely used in aerospace and transportation fields. However, the honeycomb core layer is prone to deformation under stress, especially under high impact loads. The yielding and failure of honeycomb cells often lead to a rapid decline in structural performance, thereby affecting the overall energy absorption efficiency and impact resistance. Utility Model Content

[0005] To address the technical problems existing in the prior art, this utility model provides a honeycomb sandwich with an inscribed ellipse. The technical solution is as follows:

[0006] A honeycomb sandwich with an inscribed ellipse includes: a cover plate and a core layer, with the core layer disposed between two symmetrically arranged cover plates; the core layer includes a plurality of unit cells arranged in an array, each unit cell including an internal structure and an external structure, the cross-section of the internal structure being elliptical, and the cross-section of the external structure being a concave hexagon.

[0007] Optionally, the concave hexagon is two identical trapezoids connected in reverse order, and the inner structure is placed inside the outer structure.

[0008] Optionally, the upper end of the inner structure is tangent to the top of the outer structure, the lower end of the inner structure is tangent to the bottom of the outer structure, and the two concave points of the outer structure are respectively placed on both sides of the inner structure, and the two concave points are located on the short axis of the inner structure.

[0009] Optionally, the thickness of each of the unit cells is equal to the width of the cover plate.

[0010] Optionally, the core layer includes a plurality of unit cells arranged in a rectangle with the length direction of the cover plate as the length side and the distance between two cover plates as the width side, and each unit cell is laterally and longitudinally connected to the adjacent unit cells.

[0011] Optionally, when the unit cell is laterally connected to an adjacent unit cell, the adjacent endpoints of the top edges of the two laterally adjacent and connected unit cells coincide, and the adjacent endpoints of the bottom edges of the two unit cells coincide.

[0012] Optionally, when the unit cell is longitudinally connected to an adjacent unit cell, in the cross-section of the two longitudinally adjacent and connected unit cells, the bottom edge of the upper unit cell coincides with the top edge of the lower unit cell.

[0013] Optionally, the tangent points of the internal structure and the external structure are located on the long axis of the internal structure.

[0014] The beneficial effects of the technical solution provided by this utility model embodiment include at least the following:

[0015] This invention features a simple structure, with each unit cell composed of a concave hexagon and an inscribed ellipse. Under external load, both the concave hexagon and the inscribed ellipse deform, working synergistically to optimize energy absorption. The edges of the concave hexagon bend and contract under stress, effectively dispersing external impact forces. The inscribed ellipse, through its bending characteristics, provides additional structural support during stress, enhancing overall impact resistance and energy absorption performance. The deformation of the edges and central region of the concave hexagon structure exhibits a strong synergistic effect. Under external load, the concave portion of the hexagon reduces pressure concentration and disperses force transmission through its bending characteristics, enabling the structure to efficiently absorb external energy while maintaining stability. The ellipse shape possesses excellent mechanical properties; its bending characteristics help reduce the magnitude of deformation under external force, and its stability allows for uniform stress distribution, further improving energy absorption efficiency. The combined deformation pattern of the inscribed ellipse and the concave hexagon makes the overall unit cell structure less prone to plastic deformation, maintaining high stability.

[0016] The unit cell structure within the sandwich layer, designed with an ellipse inscribed within a concave hexagon, exhibits superior mechanical performance and stability under external loads. The elliptical structure efficiently absorbs energy during compression and expansion, while simultaneously supporting the concave hexagonal frame, creating a synergistic working mechanism. As the load gradually increases, the elliptical structure may flatten, but its geometric stability and the protection provided by the hexagonal frame effectively prevent failure or tearing of traditional honeycomb structures under high loads. Furthermore, the upper and lower cover plates not only serve as the primary load-bearing platforms but also further protect the sandwich structure by distributing loads, enhancing overall impact resistance. The flexible deformation of the elliptical internal structure evenly distributes external stress, while the symmetrical frame of the concave hexagon provides strong rigid support, preventing localized stress concentration and structural instability. This synergistic effect enables the structure to exhibit excellent energy absorption, load distribution, and impact resistance under multi-level load conditions, demonstrating broad application potential. Attached Figure Description

[0017] To more clearly illustrate the technical solutions in the embodiments of this utility model, the drawings used in the description of the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0018] Figure 1 A schematic diagram of a honeycomb sandwich structure with an inscribed ellipse provided by this utility model;

[0019] Figure 2 A schematic diagram of the structure of a single cell of a honeycomb sandwich with an inscribed ellipse provided by this utility model;

[0020] Figure 3 A schematic diagram of the transverse connection of a single cell in an inscribed ellipse honeycomb sandwich layer provided by this utility model;

[0021] Figure 4 This is a schematic diagram showing the longitudinal and transverse connections of the single cells of an inscribed elliptical honeycomb sandwich layer provided by this utility model.

[0022] Figure label:

[0023] 1. Cover plate; 2. Core layer; 3. External structure; 4. Internal structure; 5. Unit cell. Detailed Implementation

[0024] To make the objectives, technical solutions, and advantages of the embodiments of this utility model clearer, the technical solutions of the embodiments of this utility model will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some, not all, of the embodiments of this utility model. All other embodiments obtained by those skilled in the art based on the described embodiments of this utility model without creative effort are within the scope of protection of this utility model.

[0025] Unless otherwise defined, the technical or scientific terms used in this invention shall have the ordinary meaning understood by one of ordinary skill in the art to which this invention pertains. The terms "first," "second," and similar terms used in this invention do not indicate any order, quantity, or importance, but are merely used to distinguish different components. Similarly, the terms "an," "a," or "the" do not indicate a quantity limitation, but rather indicate the presence of at least one. The terms "comprising" or "including" mean that the element or object preceding the word encompasses the elements or objects listed following the word and their equivalents, without excluding other elements or objects. The terms "connected" or "linked" are not limited to physical or mechanical connections, but can include electrical connections, whether direct or indirect.

[0026] It should be noted that the terms "upper", "lower", "left", "right", "front", and "back" used in this utility model are only used to indicate relative positional relationships. When the absolute position of the object being described changes, the relative positional relationship may also change accordingly.

[0027] like Figures 1-4 As shown, a honeycomb sandwich with an inscribed ellipse is provided, comprising two opposite and symmetrically arranged cover plates 1, with a core layer 2 disposed between the two cover plates 1. The core layer includes a plurality of unit cells 5 arranged in a rectangle with the length direction of the cover plate 1 as the length side and the distance between the two cover plates 1 as the width side. Each unit cell 5 is connected to adjacent unit cells 5 laterally and longitudinally, that is, the number of unit cells 5 connected laterally is the number of unit cells 5 columns, and the number of unit cells 5 connected longitudinally is the number of unit cells 5 rows. Each unit cell 5 is connected to each other, and the number of unit cells 5 in each column is the same, and the number of unit cells 5 in each row is the same. The core layer 2 can be composed of a single row of unit cells 5. The core layer 2 includes at least two unit cells 5.

[0028] The unit cell 5 includes an internal structure 4 and an external structure 3. The internal structure 4 is placed inside the external structure 3. The cross-section of the internal structure 4 is elliptical, and the major axis of the internal structure 4 is longitudinally arranged. The cross-section of the external structure 3 is a concave hexagon. The concave hexagon is formed by two identical trapezoids connected to each other in reverse. Specifically, the top side of the first trapezoid is the first side, and the bottom side is the second side. The first side is longer than the second side. The top side of the second trapezoid is the third side, and the bottom side is the fourth side. The third side is shorter than the fourth side. The lengths of the second and third sides are equal, and the lengths of the first and fourth sides are equal. The second and third sides are connected and coincident, thus connecting the two trapezoids together to obtain the concave hexagon of the cross-section of the external structure 3. The upper end of the inner structure 4 is tangent to the top of the outer structure 3, and the lower end of the inner structure 4 is tangent to the bottom of the outer structure 3. That is, the top of the ellipse is tangent to the top edge of the concave hexagon, and the point of tangency is the vertex of the major axis of the ellipse. The bottom of the ellipse is tangent to the bottom edge of the concave hexagon, and the point of tangency is the bottom point of the major axis of the ellipse.

[0029] The two concave points of the outer structure 3 are respectively placed on both sides of the inner structure 4, and the two concave points are located on the minor axis of the inner structure 4. That is, the connection point of the side of the two trapezoids on the same side is located on the ellipse, and the two connection points are the two endpoints of the minor axis of the ellipse.

[0030] The thickness of each unit cell 5 is equal to the width of the cover plate 1. When a unit cell 5 is laterally connected to an adjacent unit cell 5 (connected along the length of the cover plate 1), in the cross-sections of the two laterally adjacent and connected unit cells 5, the adjacent endpoints of the top edges of the two unit cells 5 coincide, and the adjacent endpoints of the bottom edges of the two unit cells 5 coincide. That is, the adjacent endpoints of the top edges of the two concave hexagons coincide, and the adjacent endpoints of the bottom edges of the two concave hexagons coincide. When a unit cell 5 is longitudinally connected to an adjacent unit cell 5 (connected along the distance between the two cover plates 1), in the cross-sections of the two longitudinally adjacent and connected unit cells 5, the bottom edge of the upper unit cell 5 coincides with the top edge of the lower unit cell 5, that is, the bottom edge of the upper concave hexagon coincides with the top edge of the lower concave hexagon. The cover plate 1 is mainly used as a load-bearing platform and to distribute and transfer loads, while the core layer 2 mainly serves as a deformation energy absorption and load-bearing layer.

[0031] This design features a simple structure, with each unit cell composed of a concave hexagon and an inscribed ellipse. Under external loads, both the concave hexagon and the inscribed ellipse deform, working synergistically to optimize energy absorption. The edges of the concave hexagon bend and contract under stress, effectively dispersing external impact forces. The inscribed ellipse, through its bending characteristics, provides additional structural support during stress, enhancing overall impact resistance and energy absorption. The deformation of the edges and central region of the concave hexagon exhibits a strong synergistic effect. Under external loads, the concave portion of the hexagon reduces pressure concentration and disperses force transmission through its bending characteristics, enabling the structure to efficiently absorb external energy while maintaining stability. The ellipse's shape possesses excellent mechanical properties; under external forces, its bending characteristics help reduce the magnitude of deformation, and its stability allows for uniform stress distribution, further improving energy absorption efficiency. The combined deformation pattern of the inscribed ellipse and the concave hexagon makes the overall unit cell structure less prone to plastic deformation, maintaining high stability.

[0032] The unit cell structure within the sandwich layer, designed with an ellipse inscribed within a concave hexagon, exhibits superior mechanical performance and stability under external loads. The elliptical structure efficiently absorbs energy during compression and expansion, while simultaneously supporting the concave hexagonal frame, creating a synergistic working mechanism. As the load gradually increases, the elliptical structure may flatten, but its geometric stability and the protection provided by the hexagonal frame effectively prevent failure or tearing of traditional honeycomb structures under high loads. Furthermore, the upper and lower cover plates not only serve as the primary load-bearing platforms but also further protect the sandwich structure by distributing loads, enhancing overall impact resistance. The flexible deformation of the elliptical internal structure evenly distributes external stress, while the symmetrical frame of the concave hexagon provides strong rigid support, preventing localized stress concentration and structural instability. This synergistic effect enables the structure to exhibit excellent energy absorption, load distribution, and impact resistance under multi-level load conditions, demonstrating broad application potential.

[0033] The following points need to be explained:

[0034] (1) The accompanying drawings of this utility model embodiment only involve the structure involved in this utility model embodiment. Other structures can refer to the general design.

[0035] (2) For clarity, the thickness of layers or regions is enlarged or reduced in the drawings used to describe embodiments of the present invention, i.e., these drawings are not drawn to scale. It is understood that when an element such as a layer, film, region or substrate is referred to as being “above” or “below” another element, the element may be “directly” located “above” or “below” the other element or there may be intermediate elements.

[0036] (3) Where there is no conflict, the embodiments of this utility model and the features in the embodiments can be combined with each other to obtain new embodiments.

[0037] The above are merely specific embodiments of this utility model, but the protection scope of this utility model is not limited thereto. The protection scope of this utility model shall be determined by the protection scope of the claims.

Claims

1. A honeycomb sandwich with an inscribed ellipse, characterized in that, include: It includes a cover plate and a core layer, with the core layer disposed between two symmetrically arranged cover plates; the core layer includes a plurality of unit cells arranged in an array, each unit cell including an internal structure and an external structure, the cross-section of the internal structure being elliptical and the cross-section of the external structure being concave hexagonal.

2. The honeycomb sandwich with an inscribed ellipse according to claim 1, characterized in that, The concave hexagon is composed of two identical trapezoids connected in reverse order, and the internal structure is placed within the external structure.

3. The honeycomb interlayer with an inscribed ellipse according to claim 2, characterized in that, The upper end of the internal structure is tangent to the top of the external structure, the lower end of the internal structure is tangent to the bottom of the external structure, and the two concave points of the external structure are respectively placed on both sides of the internal structure, and the two concave points are located on the short axis of the internal structure.

4. The honeycomb interlayer with an inscribed ellipse according to claim 1, characterized in that, The thickness of each of the said unit cells is equal to the width of the cover plate.

5. The honeycomb sandwich with an inscribed ellipse according to claim 1, characterized in that, The core layer comprises a plurality of unit cells arranged in a rectangle with the length of the cover plate as the length side and the distance between two cover plates as the width side. Each unit cell is connected laterally and longitudinally to the adjacent unit cells.

6. The honeycomb sandwich with an inscribed ellipse according to claim 5, characterized in that, When the unit cell is laterally connected to an adjacent unit cell, the adjacent endpoints of the top edges of the two laterally adjacent and connected unit cells coincide, and the adjacent endpoints of the bottom edges of the two unit cells coincide.

7. The honeycomb sandwich with an inscribed ellipse according to claim 5, characterized in that, When the unit cell is longitudinally connected to an adjacent unit cell, in the cross-section of the two longitudinally adjacent and connected unit cells, the bottom edge of the upper unit cell coincides with the top edge of the lower unit cell.

8. The honeycomb sandwich with an inscribed ellipse according to claim 3, characterized in that, The tangent points of the internal structure and the external structure are respectively located on the long axis of the internal structure.

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