CN114407816A - Foam metal filling pipe buffering energy-absorbing structure capable of controlling energy absorption and initial peak value - Google Patents
Foam metal filling pipe buffering energy-absorbing structure capable of controlling energy absorption and initial peak value Download PDFInfo
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- CN114407816A CN114407816A CN202111555412.8A CN202111555412A CN114407816A CN 114407816 A CN114407816 A CN 114407816A CN 202111555412 A CN202111555412 A CN 202111555412A CN 114407816 A CN114407816 A CN 114407816A
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B60—VEHICLES IN GENERAL
- B60R—VEHICLES, VEHICLE FITTINGS, OR VEHICLE PARTS, NOT OTHERWISE PROVIDED FOR
- B60R19/00—Wheel guards; Radiator guards, e.g. grilles; Obstruction removers; Fittings damping bouncing force in collisions
- B60R19/02—Bumpers, i.e. impact receiving or absorbing members for protecting vehicles or fending off blows from other vehicles or objects
- B60R19/023—Details
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B60—VEHICLES IN GENERAL
- B60R—VEHICLES, VEHICLE FITTINGS, OR VEHICLE PARTS, NOT OTHERWISE PROVIDED FOR
- B60R19/00—Wheel guards; Radiator guards, e.g. grilles; Obstruction removers; Fittings damping bouncing force in collisions
- B60R19/02—Bumpers, i.e. impact receiving or absorbing members for protecting vehicles or fending off blows from other vehicles or objects
- B60R19/18—Bumpers, i.e. impact receiving or absorbing members for protecting vehicles or fending off blows from other vehicles or objects characterised by the cross-section; Means within the bumper to absorb impact
- B60R19/22—Bumpers, i.e. impact receiving or absorbing members for protecting vehicles or fending off blows from other vehicles or objects characterised by the cross-section; Means within the bumper to absorb impact containing mainly cellular material, e.g. solid foam
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B60—VEHICLES IN GENERAL
- B60R—VEHICLES, VEHICLE FITTINGS, OR VEHICLE PARTS, NOT OTHERWISE PROVIDED FOR
- B60R19/00—Wheel guards; Radiator guards, e.g. grilles; Obstruction removers; Fittings damping bouncing force in collisions
- B60R19/02—Bumpers, i.e. impact receiving or absorbing members for protecting vehicles or fending off blows from other vehicles or objects
- B60R19/24—Arrangements for mounting bumpers on vehicles
- B60R19/26—Arrangements for mounting bumpers on vehicles comprising yieldable mounting means
- B60R19/28—Metallic springs
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B60—VEHICLES IN GENERAL
- B60R—VEHICLES, VEHICLE FITTINGS, OR VEHICLE PARTS, NOT OTHERWISE PROVIDED FOR
- B60R19/00—Wheel guards; Radiator guards, e.g. grilles; Obstruction removers; Fittings damping bouncing force in collisions
- B60R19/02—Bumpers, i.e. impact receiving or absorbing members for protecting vehicles or fending off blows from other vehicles or objects
- B60R19/24—Arrangements for mounting bumpers on vehicles
- B60R19/26—Arrangements for mounting bumpers on vehicles comprising yieldable mounting means
- B60R19/30—Elastomeric material
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B60—VEHICLES IN GENERAL
- B60R—VEHICLES, VEHICLE FITTINGS, OR VEHICLE PARTS, NOT OTHERWISE PROVIDED FOR
- B60R19/00—Wheel guards; Radiator guards, e.g. grilles; Obstruction removers; Fittings damping bouncing force in collisions
- B60R19/02—Bumpers, i.e. impact receiving or absorbing members for protecting vehicles or fending off blows from other vehicles or objects
- B60R19/24—Arrangements for mounting bumpers on vehicles
- B60R19/26—Arrangements for mounting bumpers on vehicles comprising yieldable mounting means
- B60R19/34—Arrangements for mounting bumpers on vehicles comprising yieldable mounting means destroyed upon impact, e.g. one-shot type
Abstract
The invention discloses a foam metal filling pipe buffering energy-absorbing structure capable of controlling energy absorption and initial peak values, and relates to the field of buffering energy-absorbing devices. The invention comprises a thin-wall tubular structure shell, a central thin-wall pipe and a foam metal sandwich filling reinforcing structure; the foam metal sandwich filling reinforcing structure is foam metal with an L-shaped section, the thin-wall tubular structure shell is an aluminum alloy, magnesium alloy or steel thin-wall tube, four corners of the outer contour of the section are chamfered rectangles, and L-shaped inducing open holes are formed in the extension surfaces of the four corners at equal intervals. The invention improves the buffering energy-absorbing capacity, the stability and the controllability of the structure weight and the cost, and realizes the control of the initial peak force on the premise of not remarkably reducing the energy-absorbing capacity; the energy absorption box has the advantages of light weight, high energy absorption per unit mass, stable deformation and load, higher controllability, low initial peak force, high designability and high economy.
Description
Technical Field
The invention belongs to the field of buffering and energy-absorbing devices, and particularly relates to a foam metal filling pipe buffering and energy-absorbing structure capable of controlling energy absorption and initial peak values.
Background
The buffering energy-absorbing device is an important element for protecting the safety of both sides of an collided object in the collision process, and is crushed and deformed when a vehicle and the like collide frontally, so that the energy is absorbed and the protected object is buffered and protected. To achieve the above goal, the structure needs to have a smoother load and absorb more energy at the same time during the axial compression process; at present, a thin-wall metal tube structure widely used for a buffering energy-absorbing device shows periodic wrinkle deformation under axial crushing, on one hand, a lot of energy can be absorbed by the wrinkles through plastic deformation in the forming process, and on the other hand, the structural bearing capacity can be basically kept stable through a periodic deformation mode. However, the conventional energy absorption box with a thin-wall structure has the following defects: the first fold of the energy absorption box is formed by a large acting force, and an initial peak force far higher than the stable bearing capacity of the energy absorption box is generated, so that the structure of a protected object is threatened; the thin-wall energy absorption box adopts a hollow structure, and the space utilization rate is low.
The foam metal filled tube technology introduces foam metal into a thin-wall tube as filler to form a foam metal filled tube structure. The structure utilizes the foam metal as an artificial porous material, has the advantages of high porosity, small density and light weight, the density of the common foam metal in the prior art is about 10-20% of that of the base metal, and the foam metal has the characteristics of high specific strength and stable crushing stress platform, but has the defect of low axial pressure bearing capacity. The foam metal filling pipe structure is characterized in that: the advantages of the foam metal filler and the thin-wall structure are fully exerted to make up for each other, the space utilization rate of the structure is improved, and the energy absorption effect of the structure is improved through the interaction between the foam metal filler and the thin-wall structure.
The simple filling thin-wall tube structure of the traditional foam metal has the following defects: the single-tube filling structure in the structure has poor controllability on energy absorption and buffering performance, the mutual influence between the energy absorption capacity and the stability of the shaft pressure cannot be independently adjusted, the energy absorption performance and the peak value of the shaft pressure are often simultaneously improved, and the specific multi-working-condition target is difficult to design in a targeted manner; the foam metal single tube filling structure is difficult to obtain higher effective stroke and unit mass energy absorption, and even the thin-wall tube is possibly torn due to the fact that the interaction between the thin-wall tube and the foam metal is too strong; and the foam metal pipe structure needs to increase the consumption of foam aluminum or increase the wall thickness of the pipe wall when the energy absorption is improved, so that the manufacturing cost and the quality of the foam metal pipe structure are synchronously improved.
Disclosure of Invention
The invention provides a foam metal filling pipe buffering energy-absorbing structure capable of controlling energy absorption and initial peak values, and solves the problems.
In order to solve the technical problems, the invention is realized by the following technical scheme:
the foam metal filled tube buffering energy absorption structure capable of controlling energy absorption and initial peak values is a structure with an outer square and an inner circle, and comprises a thin-wall tubular structure shell and a central thin-wall tube arranged inside the thin-wall tubular structure shell, wherein one end of the thin-wall tubular structure shell and one end of the central thin-wall tube are connected with an automobile bumper in a welding mode, a reinforcing plate with a fixed connecting hole in the surface is welded at the position where the other end of the thin-wall tubular structure shell is connected with a longitudinal beam, and foam metal is filled in a gap between the two thin-wall tubes. Adopt the interior outer tube collocation of different cross sectional shape, increase the interact between the structure interior outer tube, can not additionally increase the structure energy-absorbing under the condition of structure quality through this kind of mode. The technical key point of the invention is a novel filling structure and a performance control method thereof,
the foam metal sandwich filling reinforcing structure is arranged between the thin-wall tubular structure shell and the central thin-wall pipe and is positioned at the corner; the foam metal sandwich filling reinforcing structure is made of foam metal with an L-shaped section, which is matched with the central thin-wall pipe and the inner corner of the shell of the thin-wall tubular structure, and four side parts of foam aluminum which has a serious barrier effect on the inward deformation of the outer pipe are removed, so that the energy absorption efficiency of the double-pipe sandwich structure and the stability and controllability of the structural deformation are improved;
a first buffer rubber filling layer is filled among the inner wall of the thin-wall tubular structure shell, the two adjacent foam metal sandwich filling reinforcing structures and the central thin-wall tube, and a second buffer rubber filling layer is filled in the central thin-wall tube.
Further, when the double-tube foamed aluminum filling structure is used for buffering energy, the inner tube is shortened inwards at the impact end, so that the initial wrinkles of the inner tube and the outer tube are ensured not to occur simultaneously in the axial compression process, the initial peak value of the structural axial pressure is lower, and the energy absorption after the initial wrinkles is not influenced;
further, the inward shortening distance of the inner pipe is shorter than the length of one fold of the outer pipe, so that the energy absorption after the initial fold is not influenced, wherein the length of one fold of the outer pipe can be obtained by a single axial compression test of the outer pipe or calculated by adopting a formula.
Further, the specific shortened length of the inner pipe can be calculated according to the mechanical property and the foamed aluminum strength of the inner pipe and the outer pipe under the independent axial compression aiming at the maximum safe axial pressure index allowed by the working condition. And subtracting the sum of the peak value of the self axial pressure of the inner pipe, the average axial pressure of the foamed aluminum and the interaction between the outer pipe and the foamed aluminum from the maximum safe axial pressure in the calculation, and taking the axial pressure displacement distance of the outer pipe slightly lower than the difference as the shortened length of the inner pipe.
Further, the foam metal is a closed-cell foam material with the relative density of 10-30% and is prepared by a melt foaming method.
Further, the reinforcing plate is made of aluminum alloy, magnesium alloy or steel; the central thin-walled tube is an aluminum alloy, magnesium alloy or steel thin-walled tube; the foam metal sandwich filling reinforcing structure and the mounting end of the bumper adopt a beveling structure.
Furthermore, the thin-wall tubular structure shell is an aluminum alloy, magnesium alloy or steel thin-wall tube, and four corners of the outer profile of the cross section are chamfered rectangles.
Furthermore, the extension surfaces of the four corners of the outer contour of the cross section are provided with inducing holes at equal intervals, and the inducing holes are of L-shaped structures.
Furthermore, the opening end part of the thin-wall tubular structure shell and the positions at four corners of the outer contour of the cross section are respectively and longitudinally provided with an induction open slot.
Compared with the prior art, the invention has the following beneficial effects:
according to the design scheme of the impact energy absorption structure with the thin-wall metal inner pipe arranged in the center and the foam metal filling reinforcing structure matched with the inner pipe and the outer pipe, the inner pipe and the outer pipe with different cross section shapes are combined, so that the controllability of mutual interference of deformation between the inner pipe and the outer pipe is increased while the weight is not increased, and the buffering energy absorption capacity and the designability are improved; the controllability of the structural weight and the cost is improved through the four-corner L-shaped filling design; the control of the initial peak force is realized on the premise of not remarkably reducing the energy absorption by shortening the inner pipe and beveling the filler; the energy absorption box has the advantages of light weight, high energy absorption per unit mass, stable deformation and load, higher controllability, low initial peak force, high designability and high economy.
Of course, it is not necessary for any product in which the invention is practiced to achieve all of the above-described advantages at the same time.
Drawings
In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the drawings used in the description of the embodiments will be briefly introduced below, and it is obvious that the drawings in the following description are only some embodiments of the present invention, and it is obvious for those skilled in the art that other drawings can be obtained according to the drawings without creative efforts.
FIG. 1 is a schematic structural view of an embodiment 1 of a foamed metal filled tube with controllable impact energy absorption and initial peak value according to the present invention;
FIG. 2 is a front view of the structure of FIG. 1;
FIG. 3 is a schematic structural view of an embodiment 2 of a foamed metal filled tube with controllable impact energy absorption and initial peak value according to the present invention;
FIG. 4 is a schematic structural view of an embodiment 3 of a foamed metal filled tube with controllable impact energy absorption and initial peak value according to the present invention;
FIG. 5 is a schematic structural view of an embodiment 4 of a foamed metal filled tube with controllable impact energy absorption and initial peak value according to the present invention;
FIG. 6 is a graph comparing the axle pressure of the foam metal filled design crash box of example 4 with the axle pressure of an unfilled crash box of the same dimensions;
in the drawings, the components represented by the respective reference numerals are listed below:
1-thin-wall tubular structure shell, 101-oblique cutting structure, 102-induction opening hole, 104-fixed connecting hole, 105-chamfer, 106-induction open slot, 2-central thin-wall tube, 3-foam metal sandwich filling reinforcing structure, 4-reinforcing plate, 5-first buffer rubber filling layer and 6-second buffer rubber filling layer.
Detailed Description
The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
In the description of the present invention, it is to be understood that the terms "inside", "center", "corner", "section", etc. indicate an orientation or positional relationship merely for convenience in describing the present invention and simplifying the description, but do not indicate or imply that the referenced components or elements must have a particular orientation, be constructed and operated in a particular orientation, and thus, should not be construed as limiting the present invention.
Based on the defects mentioned in the background technology, the invention solves the problems that the initial peak force of the existing energy absorption box is higher and the axial pressure energy absorption and the axial pressure stability can not be independently controlled, and solves the problems that the energy absorption box of the traditional foam metal single tube filling structure has insufficient design, poorer controllability, insufficient energy absorption per unit mass, higher cost and the like; the foam metal filling pipe structure can independently control the energy absorption capacity and the initial peak value of the axial pressure, has stronger energy absorption capacity and more controllable cost; the following is set forth in detail:
specific example 1:
referring to fig. 1-2, the foam metal filled tube buffering energy absorption structure capable of controlling energy absorption and initial peak value of the invention is specifically a structure with square outside and round inside, and comprises a thin-wall tubular structure shell 1 and a central thin-wall tube 2 installed inside the thin-wall tubular structure shell 1, wherein one end of the thin-wall tubular structure shell 1 and one end of the central thin-wall tube 2 are connected with an automobile bumper in a welding manner, and a reinforcing plate 4 with a fixed connecting hole 104 formed on the surface is welded at the position where the other end is connected with a longitudinal beam; in the embodiment, the thin-wall tubular structure shell 1 is an aluminum alloy thin-wall tube, and four corners of the outer profile of the cross section are rectangles with chamfers 105; the height of the section of the thin-wall tubular structure shell 1 is 80mm, the width of the section is 100mm, the overall length of the thin-wall tubular structure shell 1 is 250mm, and the wall thickness of the thin-wall tubular structure shell is 2.6 mm; the wall thickness of the central thin-wall pipe 2 is 1.2mm, and the diameter is 60 mm; the central thin-wall pipe 2 is flush with the shell at the mounting end of the longitudinal beam and is flush with the induction hole closest to the front protector at the front protector mounting end;
a foam metal sandwich filling reinforcing structure 3 positioned at the corner position between the thin-wall tubular structure shell 1 and the central thin-wall tube 2; the foam metal sandwich filling reinforcing structure 3 is four foam metals with L-shaped sections, which are matched with the central thin-wall pipe 2 and the inner corners of the thin-wall tubular structure shell 1;
a first buffer rubber filling layer 5 is filled among the inner wall of the thin-wall tubular structure shell 1, the two adjacent foam metal sandwich filling reinforcing structures 3 and the central thin-wall pipe 2, and a second buffer rubber filling layer 6 is filled in the central thin-wall pipe 2; the density of the first cushion rubber filling layer 5 was 0.94g/cm3The isoprene rubber of (3); the second cushion rubber filling layer 6 is 0.85g/cm3The ethylene-propylene rubber.
Wherein the foamed metal is a closed-cell foamed aluminum material with a relative density of 10%.
Wherein, the reinforcing plate 4 is made of aluminum alloy, magnesium alloy or steel; the central thin-walled tube 2 is an aluminum alloy, magnesium alloy or steel thin-walled tube; the foam metal sandwich filling reinforcing structure 3 and the mounting end of the bumper adopt a beveling structure 101, and the lengths of the beveled long side and short side are respectively the same as the lengths of the casing and the inner pipe which are matched with the beveling long side and short side; .
Specific example 2:
as shown in fig. 3, the present embodiment differs from embodiment 1 in that the thin-walled tubular structural shell 1 is a magnesium alloy thin-walled tube, and the foamed metal is a closed-cell foamed magnesium material having a relative density of 15%; and four corners of the outer contour of the cross section are rectangles with chamfers 105; the opening end part of the thin-wall tubular structure shell 1 and the positions at four corners of the outer contour of the cross section are respectively and longitudinally provided with an induction open slot 106, the width of the induction open slot 106 is 12mm, and the length of the induction open slot 106 is 50mm, so that the initial peak value of the structure is further reduced.
Specific example 3:
as shown in fig. 4, the present embodiment differs from embodiment 1 in that the metal foam is a closed-cell aluminum foam material having a relative density of 20%; the thin-wall tubular structure shell 1 is a steel thin-wall tube, the induction holes 102 are formed in the extension surfaces of four corners of the outer contour of the cross section at equal intervals, the induction holes 102 are of an L-shaped structure, the width of each induction hole is 20mm, the length of a single edge of each induction hole is 20mm, the end portions of the induction holes 102 are arc-shaped openings, the number of the induction holes 102 formed in the extension surfaces of the four corners of the outer contour of a single cross section is two in the specific embodiment, and the adjacent intervals are 40 mm.
Specific example 4:
as shown in fig. 5, the present embodiment differs from embodiment 1 in that the metal foam is a closed-cell aluminum foam material having a relative density of 18%; the extension surfaces of the four corners of the outer contour of the cross section are provided with two induction holes 102 at equal intervals, the induction holes 102 are of L-shaped structures, the width is 20mm, the length of a single side is 20mm, the end parts of the induction holes 102 are arc-shaped openings, the extension surfaces of the four corners of the outer contour of a single cross section are provided with two induction holes 102, and the adjacent intervals are 40 mm;
in addition, the opening end part of the thin-wall tubular structure shell 1 and the positions at the four corners of the outer contour of the cross section are respectively and longitudinally provided with an induction open slot 106, the width of the induction open slot 106 is 12mm, and the length of the induction open slot 106 is 50mm, so that the initial peak value of the structure is further reduced;
the invention relates to a foam metal filling box which is of a double-tube structure, and is technically characterized by being a novel filling structure and a performance control method thereof, wherein the foam metal filling box comprises an energy absorption box thin-wall tube structure shell connected with a longitudinal beam and a bumper, and a foam metal sandwich filling reinforcing structure arranged between a thin-wall tube in the shell and two thin-wall tube structures; one end of the energy absorption box is fixedly connected with the bumper in a welding way, and the other end of the energy absorption box is connected with the longitudinal beam through a reinforcing plate fixedly connected in a welding way;
suction energy and initial peak value synchronous control method and design → non-equal length double tube and peak value control method; energy absorption improving method → outer square inner circle filling structure without increasing weight and cost; cost control method → tetragonal filling structure;
the axle pressure of the energy absorption box with the foam metal filling design of the embodiment is compared with that of the energy absorption box without filling in the same size, and as shown in the attached figure 6, compared with the energy absorption box without filling, the axle pressure platform with the energy absorption box with the filling design is improved by about 87.2 percent, and the load fluctuation is reduced by about 46 percent;
when the double-tube foamed aluminum filling structure is used for buffering energy, the central thin-wall tube 2 is inwards shortened at the impact end, so that the initial wrinkles of the central thin-wall tube 2 and the thin-wall tubular structure shell 1 are ensured not to occur simultaneously in the axial compression process, the initial peak value of the structural axial pressure is lower, and the energy absorption after the initial wrinkles is not influenced;
the inward shortening distance of the inner pipe is shorter than the length of one fold of the outer pipe, so that the energy absorption after the initial fold is not influenced, wherein the length of one fold of the outer pipe can be obtained by an independent axial compression test of the outer pipe, or the initial peak value of the square thin-walled pipe is respectively calculated by adopting the following formula:
when in use, according to the mechanical property and the foamed aluminum strength under the independent axial compression of the central thin-wall pipe 2 and the thin-wall tubular structure shell 1, the peak value force of the axial pressure when the thin-wall tubular structure shell 1 is initially folded is estimated to be the sum of the self axial pressure of the outer pipe and the average axial pressure of the foamed aluminum, and the peak value force of the axial pressure when the central thin-wall pipe 2 is estimated to be the sum of the peak value of the self axial pressure of the central thin-wall pipe 2, the axial pressure of the thin-wall tubular structure shell 1, the average axial pressure of the foamed aluminum and the interaction between the thin-wall tubular structure shell 1 and the foamed aluminum, wherein the interaction can be calculated by adopting the following formula:
therefore, the wall thickness of the inner pipe and the outer pipe and the length of the inner pipe are selected according to the maximum safe shaft pressure allowed by the working condition;
foam metal sandwich between the inner thin-wall pipe and the outer thin-wall pipe of the structure of the central thin-wall pipe 2 and the thin-wall tubular structure shell 1 is not completely filled, and four L-shaped foam metal materials which are matched with the corners of the square pipe of the energy absorption box shell and the inner thin-wall pipe are used for improving and removing four side parts of foam aluminum which has a serious barrier effect on the inward deformation of the outer pipe, so that the energy absorption efficiency of a double-pipe sandwich structure and the stability and controllability of the structural deformation are improved.
Has the advantages that:
according to the design scheme of the energy absorption box with the thin-wall metal inner pipe arranged in the center and the foam metal filling reinforcing structure matched with the inner pipe and the outer pipe, the controllability of mutual interference of deformation between the inner pipe and the outer pipe is improved through combination of the inner pipe and the outer pipe with different section shapes, and the buffering energy absorption capacity and the stability are improved; the controllability of the structural weight and the cost is improved through the four-corner L-shaped filling design; the control of the initial peak force is realized on the premise of not remarkably reducing the energy absorption by shortening the inner pipe and beveling the filler; the energy absorption box has the advantages of light weight, high energy absorption per unit mass, stable deformation and load, higher controllability, low initial peak force, high designability and high economy.
The preferred embodiments of the invention disclosed above are intended to be illustrative only. The preferred embodiments are not intended to be exhaustive or to limit the invention to the precise embodiments disclosed. Obviously, many modifications and variations are possible in light of the above teaching. The embodiments were chosen and described in order to best explain the principles of the invention and the practical application, to thereby enable others skilled in the art to best utilize the invention. The invention is limited only by the claims and their full scope and equivalents.
Claims (6)
1. Foam metal filled tube buffering energy-absorbing structure of steerable energy-absorbing and initial peak value specifically is the structure of circle in the foreign side, including thin wall tubular structure shell (1) and install in inside central thin wall pipe (2) of thin wall tubular structure shell (1), the welding links to each other between the one end of thin wall tubular structure shell (1) and central thin wall pipe (2) and the car bumper, and the reinforcing plate (4) of fixed connection hole (104) have been seted up on the surface to the position welding that the other end links to each other with the longeron, its characterized in that:
a foam metal sandwich filling reinforcing structure (3) positioned at the corner position between the thin-wall tubular structure shell (1) and the central thin-wall pipe (2); the foam metal sandwich filling reinforcing structure (3) is foam metal with an L-shaped section matched with the central thin-wall pipe (2) and the inner corner of the thin-wall tubular structure shell (1);
a first buffer rubber filling layer (5) is filled among the inner wall of the thin-wall tubular structure shell (1), the two adjacent foam metal sandwich filling reinforcing structures (3) and the central thin-wall pipe (2), and a second buffer rubber filling layer (6) is filled in the central thin-wall pipe (2).
2. The structure of claim 1, wherein the foam metal is a closed cell foam having a relative density of 10-30%.
3. The energy-absorbing and initial peak-value-controllable foam metal filled tube buffer energy-absorbing structure according to claim 1, wherein the reinforcing plate (4) is made of aluminum alloy, magnesium alloy or steel; the central thin-walled tube (2) is an aluminum alloy, magnesium alloy or steel thin-walled tube; the foam metal sandwich filling reinforcing structure (3) and the mounting end of the bumper adopt a beveling structure (101).
4. The energy-absorbing and initial peak-value-controllable foam metal filled tube buffering and energy-absorbing structure according to claim 1, wherein the thin-wall tubular structure shell (1) is a thin-wall tube made of aluminum alloy, magnesium alloy or steel, and four corners of the outer profile of the cross section are rectangles with chamfers (105).
5. The foam metal filled tube buffering energy absorption structure capable of controlling energy absorption and initial peak value according to claim 4, characterized in that the extension surfaces of four corners of the cross section outer contour are provided with inducing openings (102) at equal intervals, and the inducing openings (102) are of L-shaped structure.
6. The energy absorption and initial peak value controllable foam metal filled tube buffering and energy absorption structure according to claim 4, characterized in that the open end of the thin-walled tubular structure shell (1) and the four corners of the cross-sectional outer contour are respectively and longitudinally provided with an induction open slot (106).
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| CN202111555412.8A CN114407816A (en) | 2021-12-17 | 2021-12-17 | Foam metal filling pipe buffering energy-absorbing structure capable of controlling energy absorption and initial peak value |
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| CN202111555412.8A CN114407816A (en) | 2021-12-17 | 2021-12-17 | Foam metal filling pipe buffering energy-absorbing structure capable of controlling energy absorption and initial peak value |
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN115534852A (en) * | 2022-10-22 | 2022-12-30 | 中南大学 | Multi-pipe energy absorption device based on pipe fitting height-induced ring distribution differentiation design |
| CN115534852B (en) * | 2022-10-22 | 2024-05-03 | 中南大学 | Multitube energy-absorbing device based on pipe fitting height-induced ring distribution differentiation design |
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