CN104589731B - Rectangular pyramid resin base truss core foamed composite flat board and manufacture method - Google Patents

Abstract

Square pyramid resin-based lattice sandwich foam composite material flat plate and its manufacturing method. The present invention relates to square pyramid resin-based lattice sandwich foam composite material flat plate and its manufacturing method. In order to solve the toughening effect of foam sandwich composite material in the prior art, the present invention, The unsewn foam sandwich material is easy to delaminate, the rigidity and strength of the foam core sandwich structure are weak, and defects are easy to occur between the foam and the panel. The Z-direction reinforced foam core sandwich composite material increases the connection of the foam box panels, but its shear resistance is poor and the cost is high. The flat panel includes an upper panel, a lower panel, a lattice core and a foam material board. The upper panel, the lower panel and the foam material board are all rectangular plates, the foam material board is arranged horizontally, the dot matrix core is inserted on the foam material board, and the upper panel is laid on the upper end surface of the foam material board, and the lower panel is laid on the The invention relates to the lower end surface of a foam material plate, and belongs to the field of engineering material preparation and structural design.

Description

Square pyramid resin-based lattice sandwich foam composite material flat plate and manufacturing method

technical field

The invention relates to a resin-based lattice sandwich foam composite material flat plate and a preparation process thereof, in particular to a quadrangular pyramid resin-based lattice sandwich foam composite flat plate and a manufacturing method thereof.

Background technique

Lattice material is an ordered ultra-light porous material manufactured by simulating molecular lattice configuration. Lattice material is a periodic structural material composed of nodes and connecting rod elements between nodes. Its characteristic is that its mesoscopic configuration is a three-dimensional grid system, and the lattice sandwich foam is filled with foam in the gaps in the grid. This design improves the specific stiffness and specific strength, and enhances energy absorption. Lattice materials have better mechanical properties than metal foams with disordered microstructure at the same weight. At the same time, the gaps between lattice material grids can perform functional requirements such as oil storage and battery configuration; the porous characteristics of lattice materials meet the requirements for convective heat exchange to achieve temperature control; the unique stretching properties of grids make it promote There is a lot of room for development in the research of dynamic, braking and damped vibration. The unsewn foam sandwich material is easy to delaminate, and the rigidity and strength of the foam core sandwich structure are weak.

In order to increase the stiffness and strength of the foam core sandwich structure, foreign scholars have proposed some concepts and technologies for Z-direction reinforcement of the composite sandwich structure in recent years, and combined with a new low-cost forming process, the mechanical properties and damage of the composite sandwich structure have been improved. The tolerance has been significantly improved, creating conditions for the application of composite sandwich structures in aircraft main load-bearing structures. Z-direction reinforced foam core sandwich composite material is a new type of lightweight sandwich structure material, including sewing reinforcement, Z-pin reinforcement and X-shaped carbon fiber pin (X-Cor for short) reinforcement technology. Z-direction reinforced foam core sandwich composite material increases the connection of foam box panels, but its shear resistance is poor and the cost is high. In 2001, Larry E.Stanley of Utah University in the United States proposed a new concept sewing with the support of NASA. Reinforced foam core sandwich composite material, the structure is composed of upper and lower carbon fiber composite laminates and a rigid foam core material in the middle, Z-direction is sewn with high-strength Kevlar sutures, thereby enhancing the connection between the foam core material and the panel, Therefore, its strength and stiffness are superior to those of unstitched foam core sandwich composites, which can effectively improve the interlayer performance of sandwich panels.

Contents of the invention

The present invention aims to solve the toughening effect of the foam sandwich composite material in the prior art, the foam sandwich material without sewing is easy to delaminate, the rigidity and strength of the foam core sandwich structure are weak, and defects are easily generated between the foam and the panel. The Z-direction reinforced foam core sandwich composite material increases the connection of foam box panels, but its shear resistance is poor and the cost is high, and further provides a quadrangular pyramid resin-based lattice sandwich foam composite plate and a manufacturing method.

The technical solution adopted by the present invention to solve the above-mentioned technical problems is: the flat plate includes an upper panel, a lower panel, a lattice core and a foam material plate, and the upper panel, the lower panel and the foam material plate are all rectangular plates, and the foam material The board is arranged horizontally, the dot matrix core is inserted on the foam material board, the upper panel is laid on the upper end surface of the foam material board, and the lower panel is laid on the lower end surface of the foam material board.

Square pyramid resin-based lattice sandwich foam composite material flat plate and manufacturing method thereof, the method is realized according to the following steps: Step 1: Prefabricated foam with holes: preparing a cuboid foam, the length of the cuboid foam is 100mm, and the width of the cuboid foam is 100mm , the height of the cuboid foam is 15mm, and the through holes corresponding to the quadrangular pyramid cells are sequentially processed on the cuboid foam from left to right to complete the processing of the porous foam;

Step 2: The first layer laying: the resin-based composite material layer is respectively laid on the upper end surface and the lower end surface of the prefabricated porous foam body;

Step 3: Resin-based fiber bundle insertion: install the quadrangular pyramid cells side by side on the foam material board from left to right;

Step 4: The second layering: Lay the upper panel again on the upper end of the resin-based composite material layer laid for the first time, and lay the lower panel again on the lower end of the resin-based composite material layer laid for the first time, at 135 degrees Celsius Curing was carried out for 3 hours under a pressure of 0.1 MPa.

The beneficial effect of the present invention is that: the present invention adopts the resin-based fiber bundle interpenetration process to prepare a resin-based lattice sandwich foam composite material plate with a square pyramid configuration, which is simple and convenient to process, low in cost and easy to realize. Due to the high specific stiffness and specific strength of the rectangular pyramid-shaped resin-based lattice sandwich foam composite plate, the load-bearing efficiency of the material is improved. At the same time, it also has good noise reduction, electromagnetic radiation shielding, impact and collision resistance. Energy absorption capacity.

Description of drawings

Fig. 1 is a schematic diagram of a rectangular pyramid configuration resin-based lattice non-sandwich foam composite flat panel of the present invention, and Fig. 2 is a plurality of quadrangular pyramid cells 4 on each resin-based fiber bundle rod 5 on the lattice core of the present invention. The resin-based fiber bundle rod 5 of the position forms the schematic diagram of the plane, and the dotted line is the straight line that the resin-based fiber bundle rod 5 of the relative position forms a plane. Fig. 3 is a schematic diagram of the porous foam of the present invention, and Fig. 4 is the resin-based fiber of the present invention The schematic diagram of the beam rod 5 installed on the foam material board 7, the direction of the arrow is the installation direction and the installation sequence diagram of the resin-based fiber bundle rod 5, and FIG. 5 is an enlarged view of A in FIG. 1 .

detailed description

Specific embodiment 1: This embodiment is described in conjunction with Fig. 1-Fig. 4, the quadrangular pyramid resin-based lattice sandwich foam composite material flat plate and its manufacturing method, the flat plate includes an upper panel 1, a lower panel 2, a lattice core 3 and a foam The material plate 7, the upper panel 1, the lower panel 2 and the foam material plate 7 are all rectangular plates, the foam material plate 7 is arranged horizontally, the dot matrix core 3 is inserted on the foam material plate 7, and the upper panel 1 is laid on On the upper face of the foam board 7 , the lower panel 2 is laid on the lower face of the foam board 7 .

Specific embodiment two: This embodiment is described in conjunction with Fig. 1 and Fig. 2, square pyramid resin-based lattice sandwich foam composite material flat plate and its manufacturing method, and described lattice core 3 is arranged side by side by a plurality of square pyramid cells 4 horizontally composition.

Specific embodiment three: This embodiment is described in conjunction with Fig. 1 and Fig. 2, the quadrangular pyramid resin-based lattice sandwich foam composite material flat plate and its manufacturing method, the quadrangular pyramid cell unit 4 includes four resin-based fiber bundle rods 5, four resin-based The tops of the fiber bundle rods 5 are compared with one point, and the bottom ends of the four resin-based fiber bundle rods 5 are located on the same horizontal plane, and the bottom ends of the four resin-based fiber bundle rods 5 are located on the same horizontal plane to form a rectangle.

In this embodiment, the resin-based fiber is composed of one or more materials in fiber reinforcements such as glass fiber, carbon fiber, basalt fiber or aramid fiber.

Specific Embodiment Four: In conjunction with Fig. 1 and Fig. 2, the present embodiment is described, a rectangular pyramid resin-based lattice sandwich foam composite material flat plate and a manufacturing method, and the foam material plate 7 is processed with a plurality of quadrangular pyramid cells 4 each Each resin-based fiber bundle rod 5 corresponds to a through hole 6, and each through hole 6 is provided with a resin-based fiber bundle rod 5, and the other is the same as the first embodiment.

Specific embodiment five: This embodiment is described in conjunction with Fig. 1 and Fig. 2, a quadrangular pyramid resin-based lattice sandwich foam composite material flat plate and a manufacturing method thereof, the upper panel 1 is an upper panel 1 made of a resin-based composite material, and the lower panel 1 is made of a resin-based composite material. The panel 2 is a lower panel 2 made of a resin-based composite material, and the others are the same as the first embodiment.

Specific embodiment six: This embodiment is described in conjunction with Fig. 1-Fig. 4, the square pyramid resin-based lattice sandwich foam composite material flat plate and its manufacturing method, the center line of each of the resin-based fiber bundle rods 5 and the four resin-based The angle range formed by the horizontal plane where the rectangle is formed by the bottom end of the fiber bundle rod 5 is 30° to 50° or 50° to 80°. When the angle formed by the horizontal plane where the bottom end of the rod 5 forms a rectangle is 50°, the specific rigidity and specific strength of the rectangular pyramid-shaped resin-based lattice sandwich foam composite plate can reach the best, and the load-bearing efficiency of the material can reach the highest effect. It is the same as Embodiment 1.

Specific embodiment seven: This embodiment is described in conjunction with Fig. 1-Fig. 4, and the square pyramid resin-based lattice sandwich foam composite material flat plate and its manufacturing method adopt specific embodiment one, two, three, four, five or six

Step 1: Prefabricated foam with holes: prepare cuboid foam, the length of the cuboid foam is 100mm, the width of the cuboid foam is 100mm, and the height of the cuboid foam is 15mm. Process the cuboid foam from left to right to correspond to the quadrangular pyramid cell 4 The through hole 6 completes the processing of the porous foam;

Step 2: Laying the first layer: laying a resin-based composite material layer 8 on the upper end surface and the lower end surface of the prefabricated porous foam body respectively;

Step 3: Resin-based fiber bundle insertion: the quadrangular pyramidal cells 4 are installed side by side on the foam material board 7 from left to right;

Step 4: Lay the second layer: Lay the upper panel 1 again on the upper end surface of the resin-based composite material layer laid for the first time, and lay the lower panel 2 again on the lower end surface of the resin-based composite material layer laid for the first time. Curing was carried out at 135 degrees centigrade and 0.1 MPa pressure for 3 hours.

Embodiment 8: This embodiment is described in conjunction with Fig. 1-Fig. 4, quadrangular pyramid resin-based lattice sandwich foam composite material flat plate and manufacturing method, step 5: as described in step 3, quadrangular pyramid is installed on the left side of the foam with holes In the four through holes 6 of the cell 4, the first resin-based fiber bundle rod 5 passes through the resin-based composite material layer 8 laid on the top of the porous foam and is inserted in the through hole 6 on the left side, and Pass the first resin-based fiber bundle rod 5 through the resin-based composite material layer 8 at the bottom end of the porous foam, and pass the second resin-based fiber bundle rod 5 through the resin-based composite material layer 8 at the bottom end of the porous foam The through hole 6 located on the right side of the same quadrangular pyramid cell unit 4 passes through the resin-based composite material layer 8 at the top to form a triangular loop, and then the third resin-based fiber bundle rod 5 is passed through and laid on the top of the porous foam The resin-based composite material layer 8 is inserted in another through hole 6 on the left side of the same quadrangular pyramid cell 4, and the third resin-based fiber bundle rod 5 is passed through the resin-based composite material at the bottom end of the porous foam. Material layer 8, the resin-based composite material layer 8 that the fourth resin-based fiber bundle rod 5 passes through the bottom end of the porous foam passes through another through hole 6 that is located on the right side of the same quadrangular pyramid cell 4, and passes through another through hole 6 located on the right side of the same quadrangular pyramid cell The top layer of resin-based composite material 8;

Step 6: As described in Step 5, insert a plurality of quadrangular pyramidal cells 4 from left to right on the foam material board 7 to complete the insertion of the dot matrix core 3. Others are the same as Embodiment 7.

Claims (2)

1. A kind of 1. manufacture method of rectangular pyramid resin base truss core foamed composite flat board, it is characterised in that：Four rib Cone resin base truss core foamed composite flat board includes top panel (1), lower panel (2), dot matrix fuse (3) and foamed material Plate (7), the top panel (1), lower panel (2) and foam for panel (7) are rectangular slab, and foam for panel (7) level is set To put, dot matrix fuse (3) is inserted on foam for panel (7), and top panel (1) is laid on the upper surface of foam for panel (7), Lower panel (2) is laid on the lower surface of foam for panel (7), and the dot matrix fuse (3) is by multiple rectangular pyramid cell element (4) water The flat composition that is arranged side by side, the rectangular pyramid cell element (4) include four resin base fibre bundle bars (5), four resin base fibre bundle bars (5) top intersects at a point, and the bottom of four resin base fibre bundle bars (5) is located in same level, and four resin bases Same level where the bottom of fibre bundle bar (5) forms rectangle, the center line of each resin base fibre bundle bar (5) with It it is 30 °~50 ° positioned at the horizontal plane angulation scope where the bottom composition rectangle of four resin base fibre bundle bars (5) Or 50 °~80 °；

   Methods described is realized according to following steps：

   Step 1：Prefabricated foam with holes：Prepare cuboid foam, a length of 100mm of cuboid foam, cuboid foam it is a width of 100mm, a height of 15mm of cuboid foam, processed successively from left to right on cuboid foam corresponding with rectangular pyramid cell element (4) Through hole (6), complete the processing of foam with holes；

   Step 2：First time laying：Polymer matrix composites layer is laid respectively in prefabricated foam upper surface with holes and lower surface (8)；

   Step 3：Resin base fibre bundle inserts：Rectangular pyramid cell element (4) is mounted side by side on foam for panel successively from left to right (7) on；

   Step 4：Second of laying：Top panel is laid again in the upper surface of the polymer matrix composites layer of first time laying (1) lower panel (2), is laid again in the lower surface of the polymer matrix composites layer of first time laying, at 135 degree Celsius 0.1 million Solidification 3 hours is carried out under pa pressurized conditions.
2. 2. the manufacture method of rectangular pyramid resin base truss core foamed composite flat board according to claim 1, its feature It is：Methods described is realized according to following steps：

   Step 5：In four through holes (6) that rectangular pyramid cell element (4) is installed on the left of prefabricated foam with holes, by first resin base Fibre bundle bar (5) passes through the polymer matrix composites layer (8) for being laid on prefabricated foam tip with holes and is inserted into positioned at left side In through hole (6), and first resin base fibre bundle bar (5) is placed through to the polymer matrix composites of prefabricated foam bottom with holes Layer (8), second resin base fibre bundle bar (5) is passed through through the polymer matrix composites layer (8) of prefabricated foam bottom with holes Through hole (6) on the right side of same rectangular pyramid cell element (4), and it is placed through polymer matrix composites layer (8) formation on top Triangle loop, then the resin base for being laid on prefabricated foam tip with holes is passed through to answer the 3rd resin base fibre bundle bar (5) In condensation material layer (8) and another through hole (6) being inserted on the left of same rectangular pyramid cell element (4), by the 3rd resin Base fibre bundle bar (5) is placed through the polymer matrix composites layer (8) of prefabricated foam bottom with holes, by the 4th resin base fiber Beam bar (5) is placed through same rectangular pyramid cell element (4) right side through the polymer matrix composites layer (8) of prefabricated foam bottom with holes Another through hole (6) of side, and it is placed through the polymer matrix composites layer (8) on top；

   Step 6：Multiple rectangular pyramid cell elements (4) are inserted into completion dot matrix fuse on foam for panel (7) successively from left to right (3) insert.