CN114161784A - Light multidirectional buffering and energy absorbing structure of stainless steel ultrathin strip and preparation method - Google Patents
Light multidirectional buffering and energy absorbing structure of stainless steel ultrathin strip and preparation method Download PDFInfo
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- CN114161784A CN114161784A CN202111436444.6A CN202111436444A CN114161784A CN 114161784 A CN114161784 A CN 114161784A CN 202111436444 A CN202111436444 A CN 202111436444A CN 114161784 A CN114161784 A CN 114161784A
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Abstract
The invention provides a light multidirectional buffering energy-absorbing structure of a stainless steel ultra-thin strip and a preparation method thereof, wherein the structure comprises a honeycomb sandwich structure, panel structures are arranged on the upper surface and the lower surface of the honeycomb sandwich structure, each panel structure comprises a plurality of single-layer corrugated boards, and the arrangement directions of corrugated groove layers in the upper single-layer corrugated board and the lower single-layer corrugated board are mutually vertical; the multidirectional buffering energy-absorbing structure is provided with bearing structures in all directions, and can resist the load effects of impact, compression, bending and the like from different directions; meanwhile, the stainless steel ultra-thin strip is used as a main component material of the structure, so that the mechanical property and the service temperature are greatly improved compared with aramid paper honeycomb and aluminum honeycomb structures; in addition, the actual requirements of different protective structures can be met by regulating and controlling the sizes of the grooves in the honeycomb sandwich structure and the corrugated groove layer and selecting the filling materials in the corrugated groove layer, and the designability is strong; the stainless steel ultra-thin strip selected finally has good processability and low manufacturing cost.
Description
Technical Field
The invention relates to the field of design and preparation of light protective structures, in particular to a light multidirectional buffering energy-absorbing structure of a stainless steel ultrathin strip and a preparation method thereof.
Background
Honeycomb sandwich composite materials are generally lightweight materials of composite structure formed by bonding fibers or metal panels to the upper and lower skins of a honeycomb core by a glue bonding process. The honeycomb sandwich composite material has the advantages of light weight, good structural performance, high bending strength and rigidity, sound and heat insulation, high specific energy absorption and the like, and is widely applied to structural parts of aerospace aircrafts such as wings, fuselages, empennages, airplane floors, radar covers, liquid hydrogen storage tanks and the like.
In the manufacture of honeycomb sandwich composite panels, different types of fiber or metal sheets are generally used as component materials of the panels, and the sheets are bonded and laminated by using corresponding resin adhesives to be bonded and laminated with a honeycomb core material. The properties of panels made from materials of different compositions vary from material to material. However, in an actual service environment, various loads, especially impact loads, to which the structural member is subjected may originate from various directions, which requires that the energy-absorbing and buffering structure has the capability of resisting the multi-directional impact load.
In the out-of-plane direction of the traditional honeycomb sandwich composite material, the panel and the honeycomb core resist compression load together, so that the bearing capacity is high; however, the honeycomb core cannot bear load in the in-plane direction, and the bearing of the face plate is very limited, so that the sandwich plate cannot buffer and absorb energy. The problems that the traditional honeycomb sandwich composite material cannot effectively bear the load in the face-to-face direction and the mechanical property of the material prepared from the honeycomb core is insufficient are caused.
Disclosure of Invention
In order to solve the defects and shortcomings of the prior art, the light multidirectional buffering and energy absorbing structure of the stainless steel ultrathin strip and the preparation method are provided, so that the problems that the traditional honeycomb sandwich composite material is weak in-plane impact load resistance and the mechanical property of the honeycomb core preparation material is insufficient can be solved.
The light multidirectional buffering and energy absorbing structure of the stainless steel ultrathin strip comprises a honeycomb sandwich structure, wherein panel structures are arranged on the upper surface and the lower surface of the honeycomb sandwich structure, each panel structure comprises a plurality of single-layer corrugated boards, and the arrangement directions of corrugated groove layers in the upper single-layer corrugated board and the lower single-layer corrugated board are perpendicular to each other.
As a further improvement of the scheme, the single-layer corrugated board comprises an upper surface layer, a corrugated groove layer and a lower surface layer from top to bottom, wherein the corrugated groove layer is filled with fly ash floating beads.
As a further improvement of the above aspect, the cross-sectional shape of the corrugated groove layer is trapezoidal.
As a further improvement of the scheme, the honeycomb sandwich structure, the upper surface layer, the corrugated groove layer and the lower surface layer are all made of stainless steel ultra-thin strips.
A preparation method of a light multidirectional buffering energy-absorbing structure of a stainless steel ultra-thin strip is characterized by comprising the following steps of: the method comprises the following steps:
firstly, preparing a honeycomb sandwich structure:
secondly, preparing the single-layer corrugated board:
step 10, placing a PO hot melt adhesive film on the upper surface of the fly ash floating bead, then covering a layer of stainless steel band, placing the PO hot melt adhesive film under a hot press, heating to 150 ℃, pressurizing and curing to complete the sealing of the upper surface of the corrugated groove layer and obtain a single-layer corrugated board semi-finished product;
step 11, turning over the single-layer corrugated board semi-finished product obtained in the step 10, and repeating the operations of the steps 9 and 10 to complete the sealing of the lower surface layer of the corrugated groove layer to obtain a single-layer corrugated board;
preparation of three-layer panel structure
Step 12, alternately stacking a plurality of single-layer corrugated boards in the longitudinal direction and the transverse direction, laying PO hot melt adhesive among the single-layer corrugated boards, and then placing the single-layer corrugated boards on a hot press to heat and pressurize for curing, thus finishing the preparation of the panel structure;
composition of honeycomb sandwich structure and panel structure
And step 13, placing panel structures on the upper surface layer and the lower surface layer of the honeycomb sandwich structure, placing PO hot melt adhesive between the honeycomb sandwich structure and the panel structures, and curing by using a hot press to obtain the multidirectional buffering energy-absorbing structure.
As a further improvement of the scheme, the stainless steel ultra-thin strip in the step 1 is in a semi-hard state with the thickness of 20 μm.
As a further improvement of the above scheme, in the step 3, the width of the organic silicon structural adhesive is 5mm, the interval between adjacent organic silicon structural adhesives is 20mm, and the staggered distance between the positions where the organic silicon structural adhesive is coated on the stainless steel bands of the odd number layers and the even number layers is 10 mm.
As a further improvement of the above solution, the PO hot melt adhesive thickness in the step 10 is 40 μm.
As a further improvement of the scheme, the thickness of the PO hot melt adhesive in the step 13 is 250 μm. The invention has the beneficial effects that:
compared with the prior art, the light multidirectional buffering and energy absorbing structure of the stainless steel ultrathin strip and the preparation method thereof provided by the invention have the following advantages:
(1) the multidirectional buffering energy-absorbing structure is provided with a bearing structure in each direction, so that the multidirectional buffering energy-absorbing structure can effectively resist the load effects of impact, compression, bending and the like from different directions;
(2) the multidirectional buffering energy-absorbing structure adopts a stainless steel ultra-thin strip as a main component material of the structure, and compared with aramid fiber paper honeycomb and aluminum honeycomb structures, the mechanical property and the service temperature are greatly improved;
(3) the multidirectional buffering energy-absorbing structure can meet the actual requirements of different protective structures through regulating and controlling the sizes of grooves in the honeycomb sandwich structure and the corrugated groove layer and selecting the filling materials in the corrugated groove layer, and has extremely strong designability;
(4) the stainless steel ultra-thin strip has good processability and low manufacturing cost.
Drawings
FIG. 1 is a schematic view of a multi-directional energy absorption structure according to the present invention;
FIG. 2 is a process flow diagram of a honeycomb sandwich structure of the present invention;
fig. 3 is a process flow diagram of a single layer corrugated board of the present invention;
FIG. 4 is a process flow diagram of the panel structure of the present invention.
Wherein: 1-stainless steel ultra-thin strip; 2-organic silicon structural adhesive; 3-a corrugated groove layer; 4-a honeycomb sandwich structure; 5-corrugated mould pressing; 6-PO hot melt adhesive; 7-fly ash floating beads; 8-single-layer corrugated board; 9-panel construction.
Detailed Description
The following detailed description of embodiments of the invention is provided in conjunction with the appended drawings:
as shown in fig. 1-4, the light multidirectional buffering energy-absorbing structure of the stainless steel ultra-thin strip comprises a honeycomb sandwich structure 4, wherein panel structures 9 are arranged on the upper surface and the lower surface of the honeycomb sandwich structure 4, each panel structure 9 comprises a plurality of single-layer corrugated boards 8, and the arrangement directions of corrugated groove layers 3 in the upper single-layer corrugated board 8 and the lower single-layer corrugated board 8 which are adjacent to each other are mutually perpendicular; the single-layer corrugated board 8 comprises an upper surface layer, a corrugated groove layer 3 and a lower surface layer from top to bottom, wherein the corrugated groove layer 3 is filled with fly ash floating beads 7; the cross section of the corrugated groove layer 3 is trapezoidal; the upper surface layer, the corrugated groove layer 3 and the lower surface layer are all made of stainless steel ultra-thin strips 1.
A preparation method of a light multidirectional buffering energy-absorbing structure of a stainless steel ultra-thin strip is characterized by comprising the following steps of: the method comprises the following steps:
firstly, preparing a honeycomb sandwich structure 4:
secondly, preparing the single-layer corrugated board 8:
step 10, placing a PO hot melt adhesive 6 film on the upper surface of the fly ash floating bead 7, wherein the thickness of the PO hot melt adhesive 6 is 40 mu m, covering a layer of stainless steel belt, placing the stainless steel belt under a hot press, heating to 150 ℃, pressurizing and curing, namely completing the sealing of the upper surface of the corrugated groove layer 3, and obtaining a semi-finished product of the single-layer corrugated board 8;
step 11, turning over the single-layer corrugated board semi-finished product obtained in the step 10, and repeating the operations of the steps 9 and 10 to complete the sealing of the lower surface layer of the corrugated groove layer 3 to obtain a single-layer corrugated board 8;
preparation of Panel Structure 9
Step 12, alternately stacking a plurality of single-layer corrugated boards 8 in the longitudinal direction and the transverse direction, laying a PO hot melt adhesive 6 film between the single-layer corrugated boards 8, and then placing the single-layer corrugated boards on a hot press for heating, pressurizing and curing to complete the preparation of the panel structure 9;
composition of honeycomb sandwich structure 4 and panel structure 9
And step 13, placing the panel structures 9 on the upper surface layer and the lower surface layer of the honeycomb sandwich structure 4, placing a PO hot melt adhesive 6 membrane between the honeycomb sandwich structure 4 and the panel structures 9, wherein the thickness of the PO hot melt adhesive 6 is 250 micrometers, and curing by using a hot press to obtain the multidirectional buffering energy-absorbing structure.
The above embodiments are not limited to the technical solutions of the embodiments themselves, and the embodiments may be combined with each other into a new embodiment. The above embodiments are only for illustrating the technical solutions of the present invention and are not limited thereto, and any modification or equivalent replacement without departing from the spirit and scope of the present invention should be covered within the technical solutions of the present invention.
Claims (9)
1. The utility model provides a multidirectional buffering energy-absorbing structure of light based on stainless steel extremely thin area which characterized in that: including honeycomb sandwich structure (4), honeycomb sandwich structure's (4) upper surface, lower surface all are provided with panel structure (9), panel structure (9) are including a plurality of individual layer corrugated sheet (8), and upper and lower two are adjacent the direction mutually perpendicular of arranging of corrugated groove layer (3) in individual layer corrugated sheet (8).
2. The light multidirectional buffering and energy absorbing structure based on the stainless steel ultrathin strip is characterized in that: the single-layer corrugated board (8) comprises an upper surface layer, a corrugated groove layer (3) and a lower surface layer from top to bottom, wherein the corrugated groove layer (3) is filled with fly ash floating beads (7).
3. The light multidirectional buffering and energy absorbing structure based on the stainless steel ultrathin strip is characterized in that: the cross section of the corrugated groove layer (3) is trapezoidal.
4. The light multidirectional buffering and energy absorbing structure based on the stainless steel ultrathin strip is characterized in that: the honeycomb sandwich structure (4), the upper surface layer, the corrugated groove layer (3) and the lower surface layer are all made of stainless steel ultra-thin strips (1).
5. A preparation method of a light multidirectional buffering energy-absorbing structure based on a stainless steel ultra-thin strip is characterized by comprising the following steps of: the method comprises the following steps:
firstly, preparing a honeycomb sandwich structure (4):
step 1, cutting a stainless steel ultra-thin strip (1) into a plurality of stainless steel strips with certain length and width;
step 2, cleaning the surface of the stainless steel band by using acetone;
step 3, coating organic silicon structural adhesive (2) on the surface of the stainless steel band by using an automatic coating machine, wherein the positions coated with the organic silicon structural adhesive (2) are staggered for a certain distance on the stainless steel bands of the odd number layers and the even number layers;
step 4, stacking the stainless steel strips obtained in the step 3 layer by layer, and waiting for the organic silicon structural adhesive (2) to be completely dried and cured to obtain a plurality of layers of stainless steel strips;
step 5, fixing the top of the multilayer stainless steel strip obtained in the step 4 by using a fixture, applying a certain force to the bottom of the multilayer stainless steel strip by using traction equipment, and slowly pulling the bottom open to finish the preparation of the honeycomb core of the stainless steel ultra-thin strip (1);
secondly, preparing the single-layer corrugated board (8):
step 6, cutting the stainless steel ultra-thin strip (1) into a plurality of stainless steel strips with certain length and width;
step 7, placing the stainless steel band obtained in the step 6 between corrugated mould pressing dies (5), and pressing into a corrugated structure to obtain a corrugated groove layer (3);
step 8, cleaning the surface of the corrugated groove layer (3) by using acetone;
step 9, placing the corrugated groove layer (3) in a mold with the same size, filling fly ash floating beads (7) in grooves of the corrugated groove layer (3), injecting thermoplastic resin glue, removing overflowing glue and scraping the surface;
step 10, placing the PO hot melt adhesive (6) film on the upper surface of the fly ash floating bead (7), then covering a layer of stainless steel belt, placing the PO hot melt adhesive film under a hot press, heating to 150 ℃, pressurizing and curing to complete the sealing of the upper surface of the corrugated groove layer (3) and obtain a semi-finished product of the single-layer corrugated board (8);
step 11, turning over the semi-finished product of the single-layer corrugated board (8) obtained in the step 10, and repeating the operations in the steps 9 and 10 to complete the sealing of the lower surface layer of the corrugated groove layer (3) to obtain the single-layer corrugated board (8);
preparation of Panel Structure (9)
Step 12, alternately stacking a plurality of single-layer corrugated boards (8) in the longitudinal direction and the transverse direction, laying PO hot melt adhesive (6) among the single-layer corrugated boards (8), and then placing the single-layer corrugated boards on a hot press for heating, pressurizing and curing to complete the preparation of the panel structure (9);
composition of honeycomb sandwich structure (4) and panel structure (9)
And step 13, placing panel structures (9) on the upper surface layer and the lower surface layer of the honeycomb sandwich structure (4), placing PO hot melt adhesive (6) between the honeycomb sandwich structure (4) and the panel structures (9), and curing by using a hot press to obtain the multidirectional buffering energy-absorbing structure.
6. The method for preparing the light multidirectional buffering energy-absorbing structure based on the stainless steel ultrathin strip is characterized by comprising the following steps of: the stainless steel ultra-thin strip (1) in the step 1 is in a semi-hard state with the thickness of 20 mu m.
7. The method for preparing the light multidirectional buffering energy-absorbing structure based on the stainless steel ultrathin strip is characterized by comprising the following steps of: in the step 3, the width of the organic silicon structural adhesive (2) is 5mm, the interval between adjacent organic silicon structural adhesives (2) is 20mm, and the staggered distance of the positions where the organic silicon structural adhesive (2) is coated on the stainless steel bands of the odd layers and the even layers is 10 mm.
8. The method for preparing the light multidirectional buffering energy-absorbing structure based on the stainless steel ultrathin strip is characterized by comprising the following steps of: the thickness of the PO hot melt adhesive (6) in the step 10 is 40 μm.
9. The method for preparing the light multidirectional buffering energy-absorbing structure based on the stainless steel ultrathin strip is characterized by comprising the following steps of: the thickness of the PO hot melt adhesive (6) in the step 13 is 250 mu m.
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| CN114161784B (en) | 2024-04-23 |
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