Fiber reinforced foam sandwich composite material plate

Abstract

The utility model discloses a fiber reinforced foam sandwich composite material plate which comprises a PET (polyethylene terephthalate) plate, a PET support column, three-dimensional glass fiber fabric and a foam wrapping body, a plurality of PET supporting columns are arranged on the PET plate to form a supporting body; the three-dimensional glass fiber fabric is arranged on the supporting body; the supporting body is located in the inner cavity of the foam wrapping body. According to the composite material plate, the mechanical property of a foam sandwich structure is remarkably improved, and compared with a traditional foam sandwich plate, the risk that a connection interface falls off is reduced. The composite material plate disclosed by the utility model has higher specific strength and specific modulus, light weight and low cost, and the fluctuation of the performance influenced by the environment is small.

Description

Technical Field

[0001] The utility model relates to the technical field of blade core materials, in particular to a fiber-reinforced foam sandwich composite material board. Background Art

[0002] Core material is one of the key materials for the manufacture of wind turbine blades. Currently, the core materials used in wind turbine blade manufacturing mainly include balsa wood and rigid foam (polyvinyl chloride (PVC) and polyethylene terephthalate (PET).

[0003] Balsa wood has excellent directional performance in fiber direction, but balsa wood is a naturally grown natural polymer material. It is affected by the climate and environment, its performance fluctuates greatly, and it is susceptible to biological damage, resulting in inevitable defects. The supply price fluctuates greatly, and the supply stability cannot be guaranteed.

[0004] Rigid foam can control the raw materials and foaming process, and its performance is stable and controllable, but its mechanical properties are quite different from those of balsa wood.

[0005] Therefore, a fiber-reinforced foam sandwich composite material panel is designed to improve the defects of using balsa wood and rigid foam alone. Utility Model Content

[0006] The technical problem to be solved by the utility model is to provide a fiber reinforced foam sandwich composite material board with high specific strength and specific modulus, light weight, low cost and small fluctuation of performance affected by the environment.

[0007] In order to solve the above technical problems, the present invention adopts the following technical solution: a fiber-reinforced foam sandwich composite material panel, including a PET board, PET pillars, a three-dimensional glass fiber fabric and a foam wrapping body; a plurality of PET pillars are arranged on the PET board to form a support body; the three-dimensional glass fiber fabric is arranged on the support body; the support body is located in the internal cavity of the foam wrapping body.

[0008] Furthermore, the PET pillar and the PET plate are integrally formed.

[0009] Furthermore, the PET pillar is a hollow structure.

[0010] Furthermore, the cross section of the PET pillar is hexagonal, and a hollow inner cavity with a hexagonal structure is provided therein.

[0011] Furthermore, it also includes a PET top plate; the PET top plate is located above the support body; a plurality of PET pillars are arranged on the PET top plate; the PET pillars on the PET top plate are staggered with the PET pillars on the PET plate.

[0012] Furthermore, a plurality of through holes are provided on the PET top plate and the PET plate; and the inner cavity of the PET pillar is communicated with the through holes at corresponding positions.

[0013] Furthermore, a plurality of holes are provided on the inner cavity side wall of the PET pillar.

[0014] Furthermore, a positioning column is provided on a side of the PET plate and the PET top plate away from the three-dimensional glass fiber fabric.

[0015] The beneficial effects of the utility model are:

[0016] The composite panels of this utility model significantly improve the mechanical properties of the foam sandwich structure and reduce the risk of interface separation compared to traditional foam sandwich panels. The composite panels of this utility model have high specific strength and modulus, are lightweight, low cost, and have minimal performance fluctuations due to environmental influences. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] The present invention will be further described below with reference to the accompanying drawings and embodiments.

[0018] Figure 1 This is a structural diagram of Example 1.

[0019] Figure 2 This is a cross-sectional view of Example 1.

[0020] Figure 3 This is a schematic structural diagram of Example 2. DETAILED DESCRIPTION

[0021] The technical solution of the present invention will be clearly and completely described below through specific implementation methods. Example 1

[0022] refer to Figure 1 and Figure 2 The present invention relates to a fiber-reinforced foam sandwich composite panel comprising a PET board 1, PET struts 2, a three-dimensional glass fiber fabric 3, and a foam wrapping 4. The PET board 1 is provided with a plurality of PET struts 2 forming a support body; the PET struts 2 are integrally formed with the PET board 1. The PET struts 2 are hollow structures. The PET struts have a hexagonal cross-section and contain a hexagonal hollow cavity. The three-dimensional glass fiber fabric 3 is provided on the support body, which is located within the internal cavity of the foam wrapping 4.

[0023] In this embodiment, the mechanical properties of the foam sandwich structure are improved, and compared with the traditional foam sandwich panels, the risk of the connection interface falling off is reduced.

[0024] Preferably, the inner cavity side wall of the PET pillar is provided with a plurality of holes. Example 2

[0025] like Figure 3 As shown, the fiber reinforced foam sandwich composite material panel of this embodiment further includes a PET top plate 5; the PET top plate 5 is located above the support body; a plurality of PET pillars 2 are provided on the PET top plate 5; the PET pillars 2 on the PET top plate 5 are staggered with the PET pillars 2 on the PET plate 1.

[0026] In this embodiment, a plurality of through holes are provided on the PET top plate 5 and the PET plate 1; the inner cavity of the PET pillar 2 is communicated with the through holes at corresponding positions.

[0027] In this embodiment, the PET plate 1 and the PET top plate 5 are further provided with positioning posts 6 on a side away from the three-dimensional glass fiber fabric 3 .

[0028] This embodiment further improves the mechanical properties of the foam sandwich structure.

[0029] The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. Those skilled in the art may make various modifications or equivalent substitutions to the present invention within the essence and protection scope of the present invention, and such modifications or equivalent substitutions should also be deemed to fall within the protection scope of the technical solution of the present invention.

Claims

1. A fiber-reinforced foam sandwich composite material panel, characterized in that: The invention comprises a PET plate (1), a PET pillar (2), a three-dimensional glass fiber fabric (3) and a foam wrapping body (4); a plurality of PET pillars (2) are arranged on the PET plate (1) to form a support body; the three-dimensional glass fiber fabric (3) is arranged on the support body; and the support body is located in the internal cavity of the foam wrapping body (4).

2. The fiber-reinforced foam sandwich composite material panel according to claim 1, characterized in that: The PET pillar (2) and the PET plate (1) are integrally formed.

3. A fiber-reinforced foam sandwich composite material panel according to claim 1 or 2, characterized in that: The PET pillar (2) is a hollow structure.

4. The fiber-reinforced foam sandwich composite material panel according to claim 3, characterized in that: The cross section of the PET pillar is hexagonal, and a hollow inner cavity with a hexagonal structure is provided therein.

5. The fiber-reinforced foam sandwich composite material panel according to claim 1, characterized in that: It also includes a PET top plate (5); the PET top plate (5) is located above the support body; a plurality of PET pillars (2) are arranged on the PET top plate (5); the PET pillars (2) on the PET top plate (5) and the PET pillars (2) on the PET plate (1) are staggered.

6. The fiber-reinforced foam sandwich composite material panel according to claim 5, characterized in that: A plurality of through holes are provided on the PET top plate (5) and the PET plate (1); and the inner cavity of the PET pillar (2) is communicated with the through holes at corresponding positions.

7. The fiber-reinforced foam sandwich composite material panel according to claim 6, characterized in that: The inner cavity side wall of the PET pillar (2) is provided with a plurality of holes.

8. The fiber-reinforced foam sandwich composite material panel according to claim 1, characterized in that: Positioning columns (6) are also provided on the side of the PET plate (1) and the PET top plate (5) away from the three-dimensional glass fiber fabric (3).

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