CN109483962B - Automobile front panel with multi-layer sandwich composite structure and application of structure - Google Patents
Automobile front panel with multi-layer sandwich composite structure and application of structure Download PDFInfo
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Abstract
The invention discloses a multi-level sandwich composite structure and an automobile front panel applying the same, wherein the composite structure comprises an upper top plate, a first sandwich body and a middle partition plate which are sequentially connected, the first sandwich body comprises a plurality of first matrixes, the first matrixes are periodically arranged on a horizontal plane in an array manner, each first matrix comprises four first cross units, the four first cross units are respectively arranged along the diagonal lines of the four side surfaces of a cube, the four first cross units are sequentially connected, a first cavity is defined by the four first cross units, and two adjacent first matrixes are connected through respective first cross units. The composite structure greatly improves the structural rigidity and strength, bending resistance, penetration resistance and different-surface collision resistance. The first sandwich body is of a single-level lattice structure and has higher energy absorption capacity, and the first cavity has a noise reduction function.
Description
Technical Field
The invention relates to the technical field of automobile equipment, in particular to a multi-layer sandwich composite structure and an automobile front wall plate using the same.
Background
The holding capacity of automobiles in china has been very large and is continuously increasing. Even so, the quantity of automobiles per capita in China is still a great distance away from developed countries, and in the development of the future China industry, the automobiles still have a great growth space as the pillar industry. With the development of various technologies and the continuous improvement of the living standard of people in the field of automobile equipment, the experience requirements of people for taking automobiles are increasingly improved, particularly, the requirements for the smoothness, the noise level, the safety and other performances of the automobiles in the driving process are increasingly strict, and the automobile engineer is also promoted to pay more attention to the synchronous realization of high performance and multiple functions when researching and developing related parts. The automobile front wall board is used as a key partition board component in front of an engine compartment and a carriage, and plays an important role in aspects of engine noise isolation, engine compartment heat insulation, impact penetration resistance and the like. Therefore, the dash panel component with high collision resistance, high barrier performance and high penetration resistance of the automobile equipment has very important significance. However, most automobile front wall panels on the market at present are simple in structure and single in function, cannot effectively block a large amount of noise and heat generated by an engine of an automobile in the driving process, and cannot meet high requirements of the automobile on crashworthiness and penetration resistance when the automobile is subjected to a frontal impact accident. Therefore, the structure is designed and applied to the front wall plate, so that the requirements of high crashworthiness and light weight can be met while noise and heat generated by the engine compartment can be effectively blocked, and the structure has very important application value and practical significance.
Disclosure of Invention
The invention provides a multi-level sandwich composite structure and an automobile front panel applying the same, which overcome the defects of the background technology. One of the technical schemes adopted by the invention for solving the technical problems is as follows:
a multi-level sandwich composite structure is characterized in that: the sandwich plate comprises an upper top plate, a first sandwich body, a middle partition plate, a second sandwich body and a lower bottom plate, wherein the first sandwich body is fixedly connected to the top surface of the upper top plate and the top surface of the middle partition plate, the second sandwich body is fixedly connected between the bottom surface of the middle partition plate and the lower bottom plate, the first sandwich body comprises a plurality of first base bodies, the first base bodies are arranged on the horizontal plane in a periodic array mode, each first base body comprises four first cross units, the four first cross units are arranged along the diagonal lines of the four side surfaces of the square body respectively, the four first cross units are connected in sequence and enclose a first cavity between the four first cross units, and every two adjacent first base bodies are connected through respective first cross units.
In a preferred embodiment: the top ends and the bottom ends of the four first cross units of each first base body are respectively provided with a first connecting plane and a second connecting plane, and the first connecting planes are connected with the upper top plate in an adhesive manner and the second connecting planes are connected with the lower bottom plate in an adhesive manner.
In a preferred embodiment: the first cross units comprise two semi-cylindrical rod bodies which are arranged in a cross mode, the semi-cylindrical rod bodies are provided with outer side faces intersected with the central axis, the outer side faces of the semi-cylindrical rod bodies of the respective first cross units are attached to the outer side faces of the adjacent two first base bodies, and the respective semi-cylindrical rod bodies of the two connected first cross units are encircled to form a cylinder.
In a preferred embodiment: the second sandwich body comprises a plurality of second base bodies, the plurality of second base bodies are arranged on the horizontal plane in a periodic array mode, each second base body is composed of four second cross units, the four second cross units are arranged along the diagonal lines of the four side faces of the cube respectively, the four second cross units are connected in sequence and enclose a second cavity between the four second cross units, the number of the second cavities is the same as that of the first cavities, the second cavities correspond to the first cavities one by one, and every two adjacent second base bodies are connected through the corresponding second cross units.
In a preferred embodiment: the second cross unit comprises two composite rod bodies which are arranged in a cross mode, and each composite rod body is composed of a plurality of longitudinally superposed first base bodies.
In a preferred embodiment: the upper top plate is provided with upper through holes which are the same in number and correspond to the first cavities one to one.
In a preferred embodiment: the middle partition board is provided with middle through holes which are the same as the second cavities in number and correspond to the second cavities one to one.
In a preferred embodiment: the upper through hole and the middle through hole are concentrically arranged, and the aperture of the middle through hole is smaller than that of the upper through hole.
In a preferred embodiment: the upper top plate comprises a barrier film layer and an aluminum plate layer which are arranged up and down, the barrier film layer and the aluminum plate layer are connected in an adhesive mode, and the barrier film layer is formed by laminating an aluminum foil veneer, a polyethylene film, a warp-weft knitted fabric and a metal coating through hot melt adhesive; the middle partition plate is made of an aluminum alloy material; the lower bottom plate is made of carbon fiber materials; the first sandwich body and the second sandwich body are both made of stainless steel materials.
The second technical scheme adopted by the invention for solving the technical problems is as follows: the automobile front wall plate with the multilayer sandwich composite structure is characterized in that: the front wall plate is made of the multi-layer sandwich composite structure, the upper top plate faces the direction of the engine compartment, and the lower bottom plate faces the direction of the carriage.
Compared with the background technology, the technical scheme has the following advantages:
1. this composite construction includes top plate, first sandwich body, intermediate bottom, second sandwich body and lower floor, compares in single aluminum plate, and this composite construction very big improvement structural rigidity and intensity, bending resistance, anti penetration performance and different face crashworthiness can. Meanwhile, the first sandwich body comprises a plurality of first base bodies, the plurality of first base bodies are arranged on the horizontal plane in a periodic array mode, each first base body is composed of four first cross units, the four first cross units are arranged along the diagonal lines of the four side faces of the cube respectively, the four first cross units are connected in sequence, a first cavity is defined by the four first cross units, and every two adjacent first base bodies are connected through the respective first cross unit. The first sandwich body is of a single-level lattice structure and has higher energy absorption capacity, and the first cavity has a noise reduction function.
2. Through first connecting plane and last roof adhesive bonding, through second connecting plane and lower plate adhesive bonding for first sandwich body is bigger with last roof, first sandwich body and the sticky area of lower plate, connects more firmly.
3. The first cross units comprise two semi-cylindrical rod bodies which are arranged in a cross mode, the semi-cylindrical rod bodies are provided with outer side faces intersected with the central axis, the outer side faces of the semi-cylindrical rod bodies of the two adjacent first base bodies are attached together through the respective first cross units, and the respective semi-cylindrical rod bodies of the two connected first cross units are enclosed into a cylinder, so that the stress concentration and the fracture generation of the first sandwich body can be prevented.
4. The second sandwich body comprises a plurality of second base bodies, the plurality of second base bodies are arranged on the horizontal plane in a periodic array mode, each second base body is composed of four second cross units, the four second cross units are arranged along the diagonals of the four side faces of the cube respectively, the four second cross units are connected in sequence and enclose a second cavity between the four second cross units, the number of the second cavities is the same as that of the first cavities, the second cavities correspond to the first cavities one by one, and the two adjacent second base bodies are connected through the respective second cross units. Therefore, the external structure of the second sandwich body is the same as that of the first sandwich body, the energy absorption capacity is higher, and the second cavity has the noise reduction function.
5. The second cross unit comprises two composite rod bodies which are arranged in a cross mode, each composite rod body is composed of a plurality of longitudinally superposed first base bodies, the second sandwich body is of a multi-layer lattice structure, each composite rod body is provided with a first cavity, the porosity is increased, and noise is dissipated through continuous non-concentrated scattering so that the noise reduction effect is achieved. Therefore, the whole sandwich composite structure forms gradient gradual progress from top to bottom, and is beneficial to gradually absorbing and dissipating noise.
6. The upper top plate is provided with upper through holes which are the same in number and correspond to each other one by one, so that external noise can enter the first cavities of the first sandwich bodies through the upper through holes, and the noise guide function is achieved.
7. The middle partition board is provided with middle through holes which are the same in number as the second cavities and correspond to the second cavities one by one, the upper portions of the middle through holes correspond to the first cavities of the first sandwich bodies, the lower portions of the middle through holes correspond to the second cavities of the second sandwich bodies, and the middle through holes can guide noise in the first cavities into the second cavities and have the function of guiding the noise.
8. The upper through hole and the middle through hole are concentrically arranged, the aperture of the middle through hole is smaller than that of the upper through hole, noise can be greatly restricted in the first cavity of the first sandwich body and the second cavity of the second sandwich body, and a large amount of noise generated by the engine is prevented from being continuously reflected in the engine compartment so as to be strengthened; and meanwhile, the further heat insulation can be realized.
9. The upper top plate comprises a barrier film layer and an aluminum plate layer which are arranged up and down, the barrier film layer and the aluminum plate layer are connected in an adhesive mode, and the barrier film layer is formed by laminating an aluminum foil veneer, a polyethylene film, a warp-weft knitted fabric and a metal coating through hot melt adhesive; the barrier film has higher reflection effect and good barrier effect on heat radiation, can effectively isolate a large amount of heat generated by an engine in the running process of an automobile, and can prevent a large amount of heat and waste gas in an engine compartment from entering a compartment to influence passengers, particularly drivers, and can effectively isolate the heat generated by the engine compartment to prevent a large amount of wire harnesses and circuits in the compartment, particularly in the front of the automobile, from being influenced and interfered, so that the possibility of spontaneous combustion of the automobile is greatly reduced; the light texture is beneficial to realizing light weight; the middle partition plate is made of an aluminum alloy material, and the lower bottom plate is made of a carbon fiber material and is light in texture; the first sandwich body and the second sandwich body are both made of stainless steel materials, and the rigidity is high.
10. The front wall plate is made of the multi-layer sandwich composite structure, the upper top plate faces the direction of the engine compartment, the lower bottom plate faces the direction of the compartment, when a front collision accident happens to the vehicle, the front wall plate serves as a last barrier for protecting safety of passengers, the front wall plate with excellent collision resistance of the vehicle can effectively block further impact of front damaged parts of the vehicle, a large amount of impact energy generated by external collision is effectively absorbed, straight-face impact of parts with strong rigidity in the engine compartment, such as the engine shell, on the passengers in the compartment is avoided to a great extent, effective protection is formed on safety of the passengers, the passengers are prevented from being subjected to secondary injury in the collision process, and the overall passive safety performance of the vehicle is greatly improved. And can guarantee to increase the thickness of bounding wall under the condition that does not increase the quality, be favorable to improving its vibration characteristic and natural frequency, effectively restrain the vibration of bounding wall, avoid producing resonance with the engine, reduce the excitation influence of engine vibration to bounding wall before, greatly reduced the acoustic radiation that has bounding wall vibration arouse to reach the purpose that the damping was fallen and is made an uproar, improve the travelling comfort of riding.
Drawings
The invention is further illustrated by the following figures and examples.
FIG. 1 is a schematic diagram of a multi-layered sandwich composite structure according to a preferred embodiment.
FIG. 2 is a schematic side view of a multi-level sandwich composite structure according to a preferred embodiment.
FIG. 3 is a top view of the top plate of the preferred embodiment.
FIG. 4 is a schematic top view of a preferred embodiment of the intermediate deck.
FIG. 5 is a schematic view of the overall structure of the first sandwich body according to the preferred embodiment.
Fig. 6 is a schematic diagram illustrating a structural principle of the first cross unit.
FIG. 7 is a schematic structural diagram of the first substrate according to a preferred embodiment.
FIG. 8 is a schematic top view of the first sandwich in accordance with the preferred embodiment.
FIG. 9 is a schematic top view of the second sandwich in accordance with the preferred embodiment.
FIG. 10 is a schematic structural diagram of a second substrate according to a preferred embodiment.
FIG. 11 is a schematic side view of a second substrate according to a preferred embodiment.
Fig. 12 is a schematic structural diagram of the first substrate at a shown in fig. 11.
Detailed Description
Referring to fig. 1 to 12, a preferred embodiment of a multi-layered sandwich composite structure and a dash panel for a vehicle using the same includes an upper top plate 10, a first sandwich body 20, a middle partition plate 30, a second sandwich body 40, and a lower bottom plate 50.
The upper top plate 10 comprises a barrier film layer and an aluminum plate layer which are arranged from top to bottom, the barrier film layer and the aluminum plate layer are connected in an adhesive mode, and the barrier film layer is formed by laminating an aluminum foil veneer, a polyethylene film, a warp-weft knitted fabric and a metal coating through hot melt adhesive. The barrier film has higher reflection effect and good barrier effect on heat radiation, is applied to the front panel of the automobile, can effectively isolate a large amount of heat generated by an engine in the running process of the automobile, and can prevent a large amount of heat and waste gas in an engine compartment from entering a compartment to influence passengers, particularly drivers, and can effectively isolate the heat generated by the engine compartment to prevent a large amount of wire harnesses and circuits in the compartment, particularly in the front part of the automobile, from being influenced and interfered, so that the possibility of spontaneous combustion of the automobile is greatly reduced; and the light texture is favorable for realizing light weight. In this embodiment, the thickness of the upper top plate is designed to be 1-2 mm. According to actual needs, the thickness of the front wall plate can be designed according to the specific automobile type, and then the thickness of the top plate can be designed.
In this embodiment, the upper top plate 10 is provided with an upper through hole 11. As shown in fig. 3, the upper through hole 11 is a circular hole, and a plurality of upper through holes are arranged in a periodic lattice. The upper top plate 10 is provided with an upper through hole 11, so that external noise can enter the first cavity of the first sandwich body 20 through the upper through hole 11, and the function of introducing noise is achieved.
The first clamping body 20 is fixedly connected to the top surfaces of the upper top plate 10 and the partition plate 30. The first sandwich body 20 comprises a plurality of first substrates 21, the plurality of first substrates 21 are arranged in a periodic array on a horizontal plane, each first substrate 21 comprises four first cross units, the four first cross units are arranged along the diagonals of the four sides of the cube shown in fig. 6, the four first cross units are sequentially connected and form a first cavity 22 between the four first cross units, and the two adjacent first substrates 21 are connected through the respective first cross units. The number of the first cavities 22 is the same as that of the upper through holes 11, and the first cavities correspond to the upper through holes one by one. The size of the cube in fig. 6 may be designed to be 20 mm. The first sandwich body 20 can be manufactured by additive manufacturing rapid prototyping, and is made of stainless steel.
The composite structure comprises an upper top plate 10, a first sandwich body 20, a middle partition plate 30, a second sandwich body 40 and a lower bottom plate 50, and compared with a single aluminum plate, the composite structure greatly improves structural rigidity and strength, bending resistance, penetration resistance and different-surface collision resistance. Meanwhile, the structure of the first sandwich body 20 is a single-level lattice structure, which has a higher energy absorption capability, and the first cavity 22 has a noise reduction function.
In this embodiment, as shown in fig. 7, the top end and the bottom end of each of the four first cross units 21 are respectively provided as a first connecting plane 23 and a second connecting plane 24, and are adhesively connected to the aluminum plate layer of the upper top plate 10 through the first connecting plane 23 and adhesively connected to the lower bottom plate 50 through the second connecting plane 24. Through first connection plane 23 and last roof 10 adhesive bonding, through second connection plane 24 and lower plate 50 adhesive bonding for the sticky area of first sandwich body 20 and last roof, first sandwich body 20 and lower plate 50 is bigger, connects more firmly.
In this embodiment, as shown in fig. 7, the first crossing unit includes two half-cylindrical rods 25 arranged in a crossing manner, each half-cylindrical rod 25 has an outer side 26 intersecting with the central axis, two adjacent first bases 21 are attached together through the outer side 26 of the half-cylindrical rod 25 of the respective first crossing unit, and the respective half-cylindrical rods 25 of the two connected first crossing units enclose a cylinder. The first cross unit is structurally designed such that the first sandwich body 20 can prevent stress concentration and a fracture phenomenon.
The intermediate partition 30 is made of an aluminum alloy material.
In this embodiment, the intermediate partition 30 is provided with intermediate through holes 31, the number of which is the same as that of the upper through holes 11 or the first cavities 22, and the intermediate through holes correspond to one another. The intermediate partition plate 30 has an intermediate through hole 31, an upper portion of the intermediate through hole 31 corresponds to the first cavity 22 of the first sandwich body 20, a lower portion of the intermediate through hole 31 corresponds to the second cavity of the second sandwich body 40, and the intermediate through hole 31 can guide noise in the first cavity 22 into the second cavity, thereby having a function of guiding noise.
In this embodiment, the upper through hole 11 and the middle through hole 31 are concentrically arranged, and the diameter of the middle through hole 31 is smaller than that of the upper through hole 11. The upper through hole 11 and the middle through hole 31 are concentrically arranged, the aperture of the middle through hole 31 is smaller than that of the upper through hole 11, noise can be greatly restricted in the first cavity 22 of the first sandwich body and the second cavity of the second sandwich body 40, and a large amount of noise generated by an engine is prevented from being constantly reflected in an engine compartment and is enhanced; and meanwhile, the further heat insulation can be realized.
The second sandwich body 40 is fixedly connected between the bottom surface of the middle clapboard 30 and the lower bottom plate 50.
In this embodiment, the second sandwich body 40 includes a plurality of second substrates 41, the plurality of second substrates 41 are arranged in a periodic array on a horizontal plane, the second substrate 41 is composed of four second cross units, the four second cross units are respectively arranged along diagonal lines of four side surfaces of the cube, the four second cross units are sequentially connected and enclose a second cavity 42 between the four second cross units, the number of the second cavities 42 is the same as that of the first cavities 22, and the two adjacent second substrates 41 are connected by respective second cross units. It can be seen that the second sandwich body 40 has the same outer structure as the first sandwich body 20, has a higher energy absorbing capability, and the second cavity 42 has a noise reduction function.
In this embodiment, as shown in fig. 10 and 11, the second crossing unit includes two crossing composite rods, each of which is composed of a plurality of longitudinally stacked first bases 21 shown in fig. 12. That is, the structure of the first base 21 in the composite rod body is identical to the structure of the first base 21 in the first sandwich body 20. The second cross unit comprises two composite rod bodies which are arranged in a cross mode, each composite rod body is composed of a plurality of longitudinally superposed first base bodies 21, the second sandwich body is of a multi-layer lattice structure, each composite rod body is provided with a first cavity, the porosity is increased, and noise is dissipated through continuous non-concentrated scattering so that the noise reduction effect is achieved. Therefore, the whole sandwich composite structure forms gradient gradual progress from top to bottom, and is beneficial to gradually absorbing and dissipating noise.
In this embodiment, the second core body 40 can be manufactured by rapid additive manufacturing and forming, and is made of stainless steel.
The lower plate 50 is made of a carbon fiber material. The second core 40 is connected to the lower plate 50 by gluing.
The automobile front wall plate with the multi-layer sandwich composite structure is characterized in that the front wall plate is made of the multi-layer sandwich composite structure, a blocking film layer of an upper top plate 10 faces the direction of an engine compartment and is connected with a front upright post, and a lower bottom plate 50 faces the direction of a carriage and is connected with a floor. The connection between the top plate 10 and the front pillar and the connection between the bottom plate 50 and the floor can be performed by gluing or locking.
When the engine generates noise, the noise is guided into the first cavity 22 of the first sandwich body 20 from the upper through hole 11 of the upper top plate 10 to be dissipated, the rest noise enters the second cavity 42 through the middle through hole 31 to be dissipated, and the aperture of the middle through hole 31 is smaller than that of the upper through hole 11, so that the noise entering the first cavity 22 can be constrained in the first sandwich body 20 to the maximum extent, and a large amount of noise generated by the engine is prevented from being continuously reflected in the engine compartment to be reinforced; meanwhile, the second sandwich body 40 adopts a multi-level lattice structure, so that the whole front wall panel forms a gradient type gradual advance from top to bottom, and the noise is gradually absorbed and dissipated; each composite rod body is also provided with a plurality of communicated first cavities 22, so that the porosity is increased, and the noise can be better reduced; moreover, the lower plate 50 is not provided with a through hole, so that noise cannot enter the carriage from the lower plate 50, the noise is blocked, and noise interference on passengers is reduced.
The front wall plate is made of the multi-layer sandwich composite structure, the upper top plate 10 faces the direction of the engine compartment, the lower bottom plate 50 faces the direction of the compartment, when a front collision accident happens to the vehicle, the front wall plate serves as a last barrier for protecting the safety of passengers, the front wall plate with excellent collision resistance of the vehicle can effectively block further impact of front damaged parts of the vehicle, a large amount of impact energy generated by external collision is effectively absorbed, straight-face impact of parts with strong rigidity in the engine compartment, such as an engine shell and the like, on the passengers in the compartment is avoided to a great extent, the passengers are effectively protected safely, secondary damage is prevented from being caused in the collision process, and the overall passive safety performance of the vehicle is greatly improved. And can guarantee to increase the thickness of bounding wall under the condition that does not increase the quality, be favorable to improving its vibration characteristic and natural frequency, effectively restrain the vibration of bounding wall, avoid producing resonance with the engine, reduce the excitation influence of engine vibration to bounding wall before, greatly reduced the acoustic radiation that has bounding wall vibration arouse to reach the purpose that the damping was fallen and is made an uproar, improve the travelling comfort of riding.
The above description is only a preferred embodiment of the present invention, and therefore should not be taken as limiting the scope of the invention, which is defined by the appended claims and their equivalents.
Claims (5)
1. A multi-level sandwich composite structure is characterized in that: the square comprises an upper top plate, a first sandwich body, a middle partition plate, a second sandwich body and a lower bottom plate, wherein the first sandwich body is fixedly connected to the upper top plate and the top surface of the middle partition plate, the second sandwich body is fixedly connected between the bottom surface of the middle partition plate and the lower bottom plate, the first sandwich body comprises a plurality of first base bodies, the first base bodies are arranged on a horizontal plane in a periodic array mode, each first base body comprises four first cross units, the four first cross units are arranged along the diagonal lines of the four side surfaces of the square respectively, the four first cross units are connected in sequence, a first cavity is defined by the four first cross units, and two adjacent first base bodies are connected through respective first cross units;
the top ends and the bottom ends of the four first cross units of each first base body are respectively provided with a first connecting plane and a second connecting plane, and the top ends and the bottom ends of the four first cross units are connected with the upper top plate through the first connecting planes in an adhesive manner and are connected with the middle partition plate through the second connecting planes in an adhesive manner;
the first cross units comprise two semi-cylindrical rod bodies which are arranged in a cross mode, the semi-cylindrical rod bodies are provided with outer side faces intersected with the central axis, two adjacent first matrixes are attached together through the outer side faces of the semi-cylindrical rod bodies of the respective first cross units, and the respective semi-cylindrical rod bodies of the two connected first cross units enclose a cylinder;
the upper top plate is provided with upper through holes which are the same as the first cavities in number and correspond to the first cavities one by one;
the middle partition board is provided with middle through holes which are the same as the second cavities in number and correspond to the second cavities one by one;
the upper through hole and the middle through hole are concentrically arranged, and the aperture of the middle through hole is smaller than that of the upper through hole.
2. The multi-level sandwich composite structure of claim 1, wherein: the second sandwich body comprises a plurality of second base bodies, the plurality of second base bodies are arranged on the horizontal plane in a periodic array mode, each second base body is composed of four second cross units, the four second cross units are arranged along the diagonal lines of the four side faces of the cube respectively, the four second cross units are connected in sequence and enclose a second cavity between the four second cross units, the number of the second cavities is the same as that of the first cavities, the second cavities correspond to the first cavities one by one, and every two adjacent second base bodies are connected through the corresponding second cross units.
3. The multi-level sandwich composite structure of claim 2, wherein: the second cross unit comprises two composite rod bodies which are arranged in a cross mode, and each composite rod body is composed of a plurality of longitudinally superposed first base bodies.
4. The multi-level sandwich composite structure of claim 1, wherein: the upper top plate comprises a barrier film layer and an aluminum plate layer which are arranged up and down, the barrier film layer and the aluminum plate layer are connected in an adhesive mode, and the barrier film layer is formed by laminating an aluminum foil veneer, a polyethylene film, a warp-weft knitted fabric and a metal coating through hot melt adhesive; the middle partition plate is made of an aluminum alloy material; the lower bottom plate is made of carbon fiber materials; the first sandwich body and the second sandwich body are both made of stainless steel materials.
5. An automotive dash panel using the multi-layer sandwich composite structure of any one of claims 1 to 4, wherein: the front wall plate is made of the multi-layer sandwich composite structure, the upper top plate faces the direction of the engine compartment, and the lower bottom plate faces the direction of the carriage.
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| KR102465715B1 (en) * | 2020-07-22 | 2022-11-11 | 주식회사 알에스랩 | An unit-cell structure and A sandwich plate comprising the same |
| CN112674938B (en) * | 2020-10-23 | 2022-09-09 | 北京工业大学 | Noise reduction earplug based on dot matrix structure |
Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102840423A (en) * | 2012-09-18 | 2012-12-26 | 青岛同力得塑料蜂巢有限公司 | Heat preservation and thermal insulation double-layered honeycomb board |
| CN104441839A (en) * | 2014-12-16 | 2015-03-25 | 湖南大学 | Energy absorption structure for corrugated sandwich panel |
| CN107498948A (en) * | 2017-08-21 | 2017-12-22 | 哈尔滨工程大学 | A kind of multi-gradient dot-matrix sandwich panel and preparation method thereof |
| CN107804046A (en) * | 2017-09-18 | 2018-03-16 | 航天材料及工艺研究所 | A kind of composite sound-deadening and noise-reducing sound lining and preparation method thereof |
-
2018
- 2018-11-20 CN CN201811382785.8A patent/CN109483962B/en active Active
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102840423A (en) * | 2012-09-18 | 2012-12-26 | 青岛同力得塑料蜂巢有限公司 | Heat preservation and thermal insulation double-layered honeycomb board |
| CN104441839A (en) * | 2014-12-16 | 2015-03-25 | 湖南大学 | Energy absorption structure for corrugated sandwich panel |
| CN107498948A (en) * | 2017-08-21 | 2017-12-22 | 哈尔滨工程大学 | A kind of multi-gradient dot-matrix sandwich panel and preparation method thereof |
| CN107804046A (en) * | 2017-09-18 | 2018-03-16 | 航天材料及工艺研究所 | A kind of composite sound-deadening and noise-reducing sound lining and preparation method thereof |
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