CN110576654B - Sandwich structure applied to automobile collision energy-absorbing box - Google Patents
Sandwich structure applied to automobile collision energy-absorbing box Download PDFInfo
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- CN110576654B CN110576654B CN201910831546.4A CN201910831546A CN110576654B CN 110576654 B CN110576654 B CN 110576654B CN 201910831546 A CN201910831546 A CN 201910831546A CN 110576654 B CN110576654 B CN 110576654B
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B32—LAYERED PRODUCTS
- B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
- B32B3/00—Layered products comprising a layer with external or internal discontinuities or unevennesses, or a layer of non-planar form; Layered products having particular features of form
- B32B3/10—Layered products comprising a layer with external or internal discontinuities or unevennesses, or a layer of non-planar form; Layered products having particular features of form characterised by a discontinuous layer, i.e. formed of separate pieces of material
- B32B3/12—Layered products comprising a layer with external or internal discontinuities or unevennesses, or a layer of non-planar form; Layered products having particular features of form characterised by a discontinuous layer, i.e. formed of separate pieces of material characterised by a layer of regularly- arranged cells, e.g. a honeycomb structure
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B32—LAYERED PRODUCTS
- B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
- B32B15/00—Layered products comprising a layer of metal
- B32B15/04—Layered products comprising a layer of metal comprising metal as the main or only constituent of a layer, which is next to another layer of the same or of a different material
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B32—LAYERED PRODUCTS
- B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
- B32B3/00—Layered products comprising a layer with external or internal discontinuities or unevennesses, or a layer of non-planar form; Layered products having particular features of form
- B32B3/26—Layered products comprising a layer with external or internal discontinuities or unevennesses, or a layer of non-planar form; Layered products having particular features of form characterised by a particular shape of the outline of the cross-section of a continuous layer; characterised by a layer with cavities or internal voids ; characterised by an apertured layer
- B32B3/266—Layered products comprising a layer with external or internal discontinuities or unevennesses, or a layer of non-planar form; Layered products having particular features of form characterised by a particular shape of the outline of the cross-section of a continuous layer; characterised by a layer with cavities or internal voids ; characterised by an apertured layer characterised by an apertured layer, the apertures going through the whole thickness of the layer, e.g. expanded metal, perforated layer, slit layer regular cells B32B3/12
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B32—LAYERED PRODUCTS
- B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
- B32B33/00—Layered products characterised by particular properties or particular surface features, e.g. particular surface coatings; Layered products designed for particular purposes not covered by another single class
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B32—LAYERED PRODUCTS
- B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
- B32B5/00—Layered products characterised by the non- homogeneity or physical structure, i.e. comprising a fibrous, filamentary, particulate or foam layer; Layered products characterised by having a layer differing constitutionally or physically in different parts
- B32B5/02—Layered products characterised by the non- homogeneity or physical structure, i.e. comprising a fibrous, filamentary, particulate or foam layer; Layered products characterised by having a layer differing constitutionally or physically in different parts characterised by structural features of a fibrous or filamentary layer
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B32—LAYERED PRODUCTS
- B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
- B32B2307/00—Properties of the layers or laminate
- B32B2307/50—Properties of the layers or laminate having particular mechanical properties
- B32B2307/56—Damping, energy absorption
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B32—LAYERED PRODUCTS
- B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
- B32B2605/00—Vehicles
- B32B2605/08—Cars
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02T—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO TRANSPORTATION
- Y02T10/00—Road transport of goods or passengers
- Y02T10/10—Internal combustion engine [ICE] based vehicles
- Y02T10/40—Engine management systems
Abstract
The invention provides a sandwich structure applied to an automobile collision energy-absorbing box, which comprises the following components: the upper layer composite board, the composite interlayer and the bottom layer composite board are arranged in a laminated manner; wherein, the upper layer composite board comprises composite material fiber cloth and a titanium metal plate which are arranged in a lamination way; the composite interlayer comprises a calabash tube thin-wall structure and an annular honeycomb structure; the bottom layer composite board comprises titanium metal plates and porous metal materials which are arranged in a laminated mode. The sandwich structure overcomes the problems of high peak stress, low efficiency, heavy weight and the like of the traditional collision energy absorption structure, and can design the low peak stress, high efficiency and light automobile collision energy absorption structure so as to achieve the aim of developing safe, light and environment-friendly automobiles.
Description
Technical Field
The invention relates to an automobile collision sandwich structure, and belongs to the field of automobile passive safety protection.
Background
With the continuous development of the automobile industry, the automobile has become one of important pillar industries of national economy at present, and the automobile conservation amount in China reaches 2.4 hundred million by the end of 2018. The rapid increase of the number of automobiles brings convenience to the life of people and also brings more serious safety and environmental protection problems. Therefore, improving the safety and environmental protection of automobiles is a common goal of the global automobile industry at present. When an automobile collides, the thin-wall energy-absorbing box structure on the longitudinal beam of the automobile beam absorbs energy generated by collision through plastic deformation generated by crushing, so that the collision energy transferred to an occupant is reduced to the greatest extent, the purpose of protecting the occupant is achieved, and the automobile collision energy-absorbing box is very important. At present, most of the crash energy-absorbing boxes are square or round tubular members, the peak stress is high, the specific energy absorption is low, and better safety performance cannot be achieved when the automobile collides, meanwhile, most of the crash energy-absorbing boxes at present are generally heavy in order to achieve higher crashworthiness, more energy consumption and emission are brought by heavy automobile body mass, and therefore, the requirements of people on automobile safety, light weight and environmental protection cannot be met by most of the crash energy-absorbing boxes at present. Therefore, the design of the automobile anti-collision thin-wall energy-absorbing box with low peak stress, high energy-absorbing ratio and light weight has very important significance.
Disclosure of Invention
The invention aims to solve the main problems of high peak stress, low efficiency, heavy weight and the like of the traditional collision energy-absorbing box, and designs a low peak stress, high efficiency and light automobile collision energy-absorbing box structure so as to achieve the aim of developing an automobile with safety, light weight and environmental protection.
In order to solve the above problems, the present invention provides a sandwich structure applied to an automobile crash box, comprising: the upper layer composite board, the composite interlayer and the bottom layer composite board are arranged in a laminated manner;
wherein, the upper layer composite board comprises composite material fiber cloth and a titanium metal plate which are arranged in a lamination way; the composite interlayer comprises a calabash tube thin-wall structure and an annular honeycomb structure; the bottom layer composite board comprises titanium metal plates and porous metal materials which are arranged in a laminated manner;
the calabash thin-wall structure and the garland honeycomb structure form array arrangement, wherein the calabash thin-wall structure is positioned at four vertex angles of the array structure, and the garland honeycomb structure is positioned at other positions of the array;
characteristic curve of the gourd pipe thin-wall structureIs composed of three sections of different sinusoids, wherein the three sections of different sinusoids are respectively: y is 1 ＝2sinx，y 2 ＝sinx，
The garland type honeycomb structure consists of three circles, two sections of circular arcs and an octagon, wherein the two circles are distributed along the vertical symmetry axis of the octagon, and the other circle is arranged at the center of the octagon; two circles distributed along the vertical symmetry axis of the octagon are tangent and respectively tangent with the upper side and the lower side of the octagon; the endpoints of the two sections of circular arcs are respectively intersected with two circles distributed along the vertical symmetry axis of the octagon, and the two sections of circular arcs are respectively tangent with the left side and the right side of the octagon.
In a preferred embodiment: the composite material fiber cloth consists of aramid fiber, carbon fiber, glass fiber and metal fiber.
In a preferred embodiment: the aramid fiber, the carbon fiber, the glass fiber and the metal fiber are laminated and formed at angles of 0 degrees, 45 degrees, 90 degrees and 135 degrees from top to bottom respectively.
In a preferred embodiment: the titanium metal plate of the bottom composite plate is contacted with the lower surface of the composite interlayer.
Compared with the prior art, the invention has the beneficial effects that:
1. the invention provides a sandwich structure applied to an automobile crash box, which adopts titanium metal plates which are arranged at two ends of a composite interlayer, wherein the titanium metal has high strength, so that energy generated during the crash can be effectively and stably transferred to the composite interlayer, abrupt change of the transfer direction of crash force is effectively prevented, the energy absorption performance of the composite interlayer is more effectively utilized, and the energy absorption efficiency is improved.
2. The invention provides a sandwich structure applied to an automobile crash box, which mainly absorbs energy through a middle composite interlayer. The thin-wall structure of the calabash tube can effectively reduce peak stress, so that the danger faced by passengers in the car when collision occurs is reduced, and the multi-layer curved surface structure of the calabash tube can effectively guide the plastic deformation of the structure, so that the aim of high-efficiency energy absorption is achieved. The garland honeycomb structure has higher specific energy absorption, and the curved surface can adapt to the multi-angle collision condition, so that the safety of passengers is effectively protected.
3. The invention provides a sandwich structure applied to an automobile crash box, which is made of composite material fiber cloth, titanium metal, light aluminum alloy and porous metal materials, wherein the materials are smaller in mass while meeting the safety, meet the design requirement of light weight and meet the environmental protection theme.
Description of the drawings:
FIG. 1 is a schematic view of the overall structure of the present invention;
FIG. 2 is a schematic cross-sectional view of an upper composite panel of the present invention;
FIG. 3 is a schematic top view of the upper composite panel of the present invention;
FIG. 4 is a schematic illustration of a composite sandwich structure of the present invention;
FIG. 5 is a schematic view of the underlying composite panel structure of the present invention;
FIG. 6 is a schematic diagram of a thin-wall structure of a calabash tube of the present invention;
FIG. 7 is a schematic view of a rosette honeycomb structure of the present invention;
the specific embodiment is as follows:
the description is further illustrated below in connection with specific embodiments. It should be noted that: the following examples are given for illustration of the invention and are not intended to limit the scope of the invention, but all modifications and variations that do not depart from the scope of the invention are intended to be included in the scope of the invention as defined in the claims.
The invention provides a sandwich structure applied to an automobile crash box, which comprises an upper composite board 101, a composite interlayer 102 and a bottom composite board 103 as shown in fig. 1.
The upper layer composite board 101 is shown in fig. 2 and 3, and comprises composite fiber cloth 201 and titanium metal plate 202; the composite material fiber cloth 201 is composed of aramid fiber 203, carbon fiber 204, glass fiber 205 and metal fiber 206, has the advantages of high axial strength, light weight, good fatigue, small thermal expansion coefficient and the like, and can improve the crashworthiness of the energy absorption box and the applicability under multiple environments; the titanium metal plate 202 is in contact with the middle composite interlayer 102, the titanium metal has small density, good low-temperature performance and high thermal strength, can adapt to the collision condition under severe weather, and has larger strength to well transfer the energy generated by collision to the middle composite interlayer and absorb more collision energy as much as possible by the middle composite interlayer.
The aramid fiber layer 203, the carbon fiber layer 204, the glass fiber layer 205 and the metal fiber layer 206 are laminated and formed at angles of 0 °, 45 °, 90 ° and 135 ° from top to bottom respectively, and the multi-angle braiding technology can effectively avoid negative effects caused by defects of various fiber materials, so that the whole composite fiber cloth has ideal performance.
The composite interlayer 102 is shown in fig. 4 and consists of a calabash tube thin-wall structure 301 and a garland-shaped honeycomb structure 302, wherein the calabash tube thin-wall structure 301 is shown in fig. 6, and the garland-shaped honeycomb structure 302 is shown in fig. 7. The calabash thin-wall structure 301 and the garland type honeycomb structure 302 form array arrangement, wherein the calabash thin-wall structure 301 is positioned at four vertex angles of the array structure, and the garland type honeycomb structure 302 is positioned at other positions of the array; the characteristic curve of the calabash thin-wall structure 301 is composed of three sections of different sinusoidal curves, and the three sections of different sinusoidal curves are respectively: y is 1 ＝2sinx，y 2 ＝sin x，
The reason for adopting three sections of different sinusoids is that a multi-layer structure with smooth transition at the joint can be generated, and each layer has similar characteristics, so that the structure is ensured to have very stable performance on the whole, and the whole structure can stably play the role of guiding the honeycomb part in the composite interlayer to deform layer by layer when being impacted.
The garter-type honeycomb structure 302 is composed of three circles, two sections of circular arcs and an octagon, wherein the two circles are distributed along the vertical symmetry axis of the octagon, and the other circle is arranged at the center of the octagon; two circles distributed along the vertical symmetry axis of the octagon are tangent and respectively tangent with the upper side and the lower side of the octagon; the endpoints of the two sections of circular arcs are respectively intersected with two circles distributed along the vertical symmetry axis of the octagon, and the two sections of circular arcs are respectively tangent with the left side and the right side of the octagon.
Although the mechanical properties of the single calabash thin-wall structure 301 are inferior to those of the honeycomb structure, the graded multi-layer design is more favorable for guiding the structure to perform layer-by-layer compression deformation when the structure is impacted, so the calabash thin-wall structure 301 is arranged at four corners of the composite interlayer, the purpose of the structure is to guide the composite interlayer to perform layer-by-layer compression deformation better after the impact is impacted, and the rest positions are filled by the annular honeycomb structure 302, so the structure aims to make up the defect of total energy absorption of the calabash thin-wall structure 301. The combination of the two can ensure that the sandwich structure absorbs more energy and the energy absorbing efficiency is high enough. The symmetrical sandwich structure can effectively cope with collision of various angles, the calabash tube thin-wall structure 301 can effectively reduce peak stress, the curved side wall of the calabash tube thin-wall structure can guide the honeycomb to perform plastic deformation, and further energy absorption is more efficient, the garland type honeycomb structure 302 has higher energy absorption ratio, and more collision energy can be stably and efficiently absorbed.
As shown in fig. 5, the bottom layer composite board 103 is composed of a titanium metal plate 401 and a porous metal material 402, the titanium metal plate 401 is in contact with the middle composite interlayer 102, the higher strength of the titanium metal plate assists the middle composite interlayer 102 to absorb collision energy more efficiently, the other layer is the porous metal material 402, and the porous metal material 402 has the characteristics of small specific gravity, good rigidity, good specific strength and the like, can assist the middle composite interlayer 102 to absorb energy, and can improve the stability of the whole sandwich structure due to the characteristic of good shock absorption.
The sandwich structure is composed of all parts by bonding means, and the manufacturing means is simple. The invention adopts light materials such as fiber materials, titanium metals, light aluminum alloys, porous metal materials and the like, effectively meets the light weight requirement, and can effectively reduce the energy consumption of the automobile while fully ensuring the absorption of collision energy, thereby reducing the emission pollution and meeting the design requirement of the environment-friendly automobile.
The foregoing is merely illustrative of the preferred embodiments of the present invention and is not intended to limit the scope of the invention. Equivalent changes and modifications are intended to be covered by this invention, as equivalents will fall within the scope of the invention.
Claims (4)
1. Be applied to sandwich structure on car collision energy-absorbing box, its characterized in that includes: the upper layer composite board, the composite interlayer and the bottom layer composite board are arranged in a laminated manner;
wherein, the upper layer composite board comprises composite material fiber cloth and a titanium metal plate which are arranged in a lamination way; the composite interlayer comprises a calabash tube thin-wall structure and an annular honeycomb structure; the bottom layer composite board comprises titanium metal plates and porous metal materials which are arranged in a laminated manner;
the calabash thin-wall structure and the garland honeycomb structure form array arrangement, wherein the calabash thin-wall structure is positioned at four vertex angles of the array structure, and the garland honeycomb structure is positioned at other positions of the array;
the characteristic curve of the calabash tube thin-wall structure is composed of three sections of different sinusoidal curves, wherein the three sections of different sinusoidal curves are respectively: y is 1 ＝2sinx，y 2 ＝sinx，
The garland type honeycomb structure consists of three circles, two sections of circular arcs and an octagon, wherein the two circles are distributed along the vertical symmetry axis of the octagon, and the other circle is arranged at the center of the octagon; two circles distributed along the vertical symmetry axis of the octagon are tangent and respectively tangent with the upper side and the lower side of the octagon; the endpoints of the two sections of circular arcs are respectively intersected with two circles distributed along the vertical symmetry axis of the octagon, and the two sections of circular arcs are respectively tangent with the left side and the right side of the octagon.
2. The sandwich structure applied to an automobile crash box according to claim 1, wherein: the composite material fiber cloth consists of aramid fiber, carbon fiber, glass fiber and metal fiber.
3. The sandwich structure applied to an automobile crash box according to claim 2, wherein: the aramid fiber, the carbon fiber, the glass fiber and the metal fiber are laminated and formed at angles of 0 degrees, 45 degrees, 90 degrees and 135 degrees from top to bottom respectively.
4. The sandwich structure applied to an automobile crash box according to claim 1, wherein: the titanium metal plate of the bottom composite plate is contacted with the lower surface of the composite interlayer.
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Families Citing this family (3)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN111619170B (en) * | 2020-06-23 | 2022-12-23 | 华侨大学 | Sandwich structure for passenger car protection structure |
| CN112081850A (en) * | 2020-09-30 | 2020-12-15 | 华侨大学 | Vibration-damping energy-absorbing composite capsule |
| CN113007583B (en) * | 2021-03-17 | 2022-11-18 | 三峡大学 | Cellular progressive hierarchical honeycomb sandwich structure |
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