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Pyramid-shaped lattice sandwich shell made of composites and preparation method of pyramid-shaped lattice core sandwich shell

A technology of composite materials and pyramids, which is applied in the field of composite material pyramid-shaped lattice sandwich shells and its preparation, can solve the problems of inaccessibility of lattice core spaces, excessive manual operations, and complicated preparation processes, and achieves a wide range of applications , Less manual operation, simple preparation process

Active Publication Date: 2015-12-30
HARBIN INST OF TECH
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  • Abstract
  • Description
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  • Application Information

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Problems solved by technology

[0004] The present invention solves the problem that the space of the existing lattice core cannot be penetrated, and it is inconvenient to realize the functions of pre-embedding, heat conduction, ventilation and heat transfer. At the same time, the existing composite material pyramid-shaped lattice sandwich shell is heavy and its preparation process is complicated. , too many manual operations and low preparation efficiency, and then propose a composite material pyramid lattice sandwich shell and its preparation method

Method used

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  • Pyramid-shaped lattice sandwich shell made of composites and preparation method of pyramid-shaped lattice core sandwich shell
  • Pyramid-shaped lattice sandwich shell made of composites and preparation method of pyramid-shaped lattice core sandwich shell
  • Pyramid-shaped lattice sandwich shell made of composites and preparation method of pyramid-shaped lattice core sandwich shell

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specific Embodiment approach 1

[0024] Specific implementation mode one: combine figure 2 , image 3 , Figure 4 , Figure 5 and Figure 6 Describe the present embodiment, which includes a pyramid-shaped lattice core 1, a composite material inner panel and a composite material outer panel;

[0025] The pyramidal lattice core 1 comprises N inner core bars 4, N outer core bars 5, a plurality of pyramidal lattice structure unit cells 6, and the N inner core bars 4 and N outer core bars Core strips 5 are staggered to form a cylinder, N inner core strips 4 are arranged close to the central axis of the cylinder, N outer core strips 5 are arranged away from the cylindrical central axis, each inner core strip 4 A plurality of pyramid-shaped lattice structure unit cells 6 are arranged along the cylindrical axial direction between the adjacent outer core strips 5, and each pyramid-shaped lattice structure unit cell 6 is composed of four rods in order. The secondary connection forms a trapezoidal one piece, the i...

specific Embodiment approach 2

[0028] Specific implementation mode two: combination Figure 6 Describe this embodiment, in this embodiment, each pyramid-shaped lattice structure unit cell 6 comprises a long rod 6-1, a short rod 6-2 and two connecting rods 6-3, and the long rod 6-1 and the short rod 6-2 are parallel to each other, and the long rod 6-1 and the short rod 6-2 are connected by two connecting rods 6-3 to form a trapezoidal hole structure, between each inner core strip 4 and its adjacent outer core A plurality of short rods 6-2 in a plurality of pyramidal lattice structure unit cells 6 between the sub-bars 5 are staggered from top to bottom, and the long rods 6-1 in each pyramidal lattice structure unit cell 6 are connected with each other. The short rods 6-2 in two adjacent pyramidal lattice structure unit cells 6 are on the same straight line. Other unmentioned structures and connections are the same as those in the first embodiment.

specific Embodiment approach 3

[0029] Specific implementation mode three: combination figure 2 , image 3 , Figure 4 and Figure 5 Describe this embodiment, in this embodiment, the outer surface of each pyramid-shaped lattice structure unit cell 6 is bonded with the outer panel of the composite material, and the inner surface of each pyramid-shaped lattice structure unit cell 6 is bonded to the inner surface of the composite material. The panels are glued together.

[0030] In this embodiment, the inner surface of each pyramid-shaped lattice structure unit cell 6 is glued to the composite material inner panel by resin, and the outer surface of each pyramid-shaped lattice structure unit cell 6 is bonded to the composite material outer panel by resin. Other unmentioned structures and connections are the same as those in the first or second embodiment.

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Abstract

The invention relates to a pyramid-shaped lattice sandwich shell made of composites and a preparation method of the pyramid-shaped lattice core sandwich shell and aims at solving the problems that existing lattice core spaces are not penetrable, pre-burying, heat conduction, ventilation and heat transfer functions are not convenient to achieve, and meanwhile existing pyramid-shaped lattice sandwich shells made of composites are high in weight, complex in preparation process, excessive in manual operation and low in preparation efficiency. According to the shell, N inner core strips and N outer core stripes are arranged in a staggered mode for forming a cylindrical shape, multiple pyramid-shaped lattice structure unit cells are arranged between each inner core strip and the corresponding adjacent outer core strip, and each pyramid-shaped lattice structure unit cell is a pyramid-shaped integrated part which is formed by connecting heads and tails of four rod pieces in sequence. The preparation method comprises the seven steps of drawing trapezoid on rectangular knitting prepreg materials, processing trapezoidal holes, laying the knitting prepreg materials on a dedicated die, conducting curing and conducting demolding in sequence. The pyramid-shaped lattice sandwich shell made of the composites and the preparation method are applicable to the fields of aviation and aerospace.

Description

technical field [0001] The invention specifically relates to a composite material pyramid-shaped lattice sandwich shell and a preparation method thereof. Background technique [0002] Composite lattice material is an advanced lightweight and multifunctional structural material with great potential. The biggest difference from traditional materials is that it has a series of excellent properties such as low density, high specific modulus, and small thermal expansion coefficient. Therefore, it has many excellent properties. performance. With the development of manufacturing technology in the industry, the lattice sandwich structure made of carbon fiber composite materials has further expanded its application fields, especially in the field of aerospace. From a structural point of view, the lattice sandwich structure has mechanical properties comparable to traditional honeycomb structures. And better than metal foam. However, the existing lattice cores, including grid-type an...

Claims

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Application Information

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IPC IPC(8): B29C70/34
CPCB29C70/342
Inventor 王兵周磊王世勋吴林志马力张东兴
Owner HARBIN INST OF TECH
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