CN109284542A - A kind of high intensity, porous material energy absorption device and porous material strength determine method - Google Patents
A kind of high intensity, porous material energy absorption device and porous material strength determine method Download PDFInfo
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- CN109284542A CN109284542A CN201811024028.3A CN201811024028A CN109284542A CN 109284542 A CN109284542 A CN 109284542A CN 201811024028 A CN201811024028 A CN 201811024028A CN 109284542 A CN109284542 A CN 109284542A
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- porous material
- relative density
- tubular body
- energy absorption
- absorption device
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- G—PHYSICS
- G06—COMPUTING; CALCULATING OR COUNTING
- G06F—ELECTRIC DIGITAL DATA PROCESSING
- G06F30/00—Computer-aided design [CAD]
- G06F30/20—Design optimisation, verification or simulation
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N3/00—Investigating strength properties of solid materials by application of mechanical stress
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N2203/00—Investigating strength properties of solid materials by application of mechanical stress
- G01N2203/02—Details not specific for a particular testing method
- G01N2203/0202—Control of the test
- G01N2203/0212—Theories, calculations
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- G—PHYSICS
- G06—COMPUTING; CALCULATING OR COUNTING
- G06F—ELECTRIC DIGITAL DATA PROCESSING
- G06F2119/00—Details relating to the type or aim of the analysis or the optimisation
- G06F2119/06—Power analysis or power optimisation
Abstract
The present invention discloses a kind of high intensity, porous material energy absorption device and its porous material strength determines method；Energy absorption device includes support plate (2), maneuvering board (1), porous material (3), the porous material (3) is formed by multiple rows of horizontal positioned tubular body is stacked, each tubular body (4) axis is parallel to each other and in the same plane in each row, successively side by side close to placement, in every row's tubular body (4), the structure size and relative density of each tubular body (4) are arranged symmetrically relative to the central axis (5) of porous material, in every row's tubular body (4), along central axis (5) side setting adjacent tubular body (4) between there are relative density differences；Porous material strength determines that method includes: that (10) relative density disaggregation calculates, and (20) relative density determines, (30) cell parameter calculates, and (40) coefficient of intensification calculates, and (50) structural strength determines.High intensity, porous material energy absorption device of the invention, intensity is high, material saves.
Description
Technical field
The invention belongs to strengthen porous material technical field, the high intensity, porous material that especially a kind of intensity is high, material saves
Material energy absorption device and porous material strength determine method.
Background technique
In fields such as building, traffic, porous material has been widely used as protective materials.Usually, it is desirable that
Fender has lighter quality again while protective capacities with higher, this requires under certain quality as far as possible
The intensity for improving porous material, makes to be effectively protected by fender.
The prior art such as Chinese invention patent " a kind of honeycomb and design method for improving structural strength " (application number:
CN201610539128.4, publication number: CN106678221A, publication date: 2017-05-17), it discloses by periodically folding
Honeycomb cell array composition the porous material with periodical folding characteristic.The honeycomb cell element in each fold period is carried out
It folds twice, the first fold direction is any, and second fold direction is contrary with the first fold, honeycomb cell element after folding
Surface and fold before honeycomb cell element surface angular range between 10 °~34 °, by periodical folded-sheet honeycomb structure cell element along antarafacial direction into
Row is connected in series, and carries out array in in-plane direction after connection, honeycomb in-plane direction structural strength can be improved.But this method
The problem is that: the design parameter of honeycomb is more, structure is complicated；Strength theory model is not provided, cannot achieve function
It can navigation designing.
Summary of the invention
The purpose of the present invention is to provide a kind of high intensity, porous material energy absorption device, intensity is high, material saves.
Another object of the present invention is to provide a kind of porous material strengths to determine method, to simple, accurate determining high
The intensity of porous material in strength porous material energy absorption device.
The technical solution for realizing the aim of the invention is as follows:
A kind of high intensity, porous material energy absorption device, including support plate 2, maneuvering board 1 and upper end be connected with support plate 2,
The porous material 3 that lower end is connected with maneuvering board 1, the porous material 3 is formed by multiple rows of horizontal positioned tubular body is stacked, each to arrange
In each 4 axis of tubular body be parallel to each other and in the same plane, successively side by side close to placement, in every row's tubular body 4, respectively
The structure size and relative density of tubular body 4 are arranged symmetrically relative to the central axis 5 of porous material, in every row's tubular body 4,
Along 5 side of central axis setting adjacent tubular body 4 between there are relative density differences.
Realize the technical solution of another object of the present invention are as follows:
A kind of porous material strength of energy absorption device determines method, includes the following steps:
(10) relative density disaggregation calculates: according to gradient porous material relative density theoretical model, calculating relative density solution
Collection；
(20) relative density determines: different solution and its corresponding gradient factor is concentrated according to relative density solution, determining should
Solve the relative density of corresponding porous material；
(30) cell parameter calculates: calculating porous material tubular body according to even porous material relative density theoretical model
The value of gradient control parameter.
(40) coefficient of intensification calculates: according to cell parameter and the corresponding tradition with same overall and relative density
The structural parameters of even porous material calculate coefficient of intensification；
(50) structural strength determines: according to the yield stress of coefficient of intensification and raw material, the knot of porous material is calculated
Structure intensity.
Compared with prior art, the present invention its remarkable advantage is:
1, structure is simple and easy to implement；
2, the intensity of honeycomb can be significantly improved on the basis of not increasing raw material, to improve the use of material
Efficiency meets lightweight demand；
3, functional direction design can be carried out according to theoretical model.
Detailed description of the invention
Fig. 1 is the structural schematic diagram of the high intensity, porous material energy absorption device of the present invention.
Fig. 2 is the cellular structural schematic diagram of regular hexagon of embodiment.
Fig. 3 is the schematic diagram of piecewise linearity gradient distribution mode in the present invention.
Fig. 4 is porous material strength of the present invention with whole relative density change curve.
Fig. 5 is that the porous material strength of energy absorption device of the present invention determines the flow chart of method.
In figure, maneuvering board 1, support plate 2, porous material 3.
Specific embodiment
As shown in Figure 1, the high intensity, porous material energy absorption device of the present invention, including support plate 2, maneuvering board 1 and upper end with
The porous material 3 that support plate 2 is connected, lower end is connected with maneuvering board 1, the porous material 3 is by multiple rows of horizontal positioned tubular body
Stacked to form, each 4 axis of tubular body is parallel to each other and in the same plane in each row, described every successively side by side close to placement
It arranges in tubular body 4, the structure size and relative density of each tubular body 4 are arranged symmetrically relative to the central axis 5 of porous material, described
In every row's tubular body 4, along 5 side of central axis setting adjacent tubular body 4 between there are relative density differences.
Preferably, the relative density in every row's tubular body 4, between the adjacent tubular body 4 of 5 side of central axis setting
Difference is definite value.
As further preferred, the central axis 5 respectively arranged is in the same plane.
4 section of tubular body can be any period planform.It preferably, is in regular hexagon, circle or square.
The present embodiment is using regular hexagon honeycomb as porous material (as shown in Figure 2), by 5 sub- honeycomb 31-
35 compositions (shown in such as Fig. 2 (a)).Sub-honeycomb structure 31-35 realizes that it is opposite by changing the arm thickness of regular hexagon cell element
The change of density, as shown in Fig. 2 (b), wherein sub-honeycomb structure 31 and 35,32 and 34 is respectively provided with identical relative density.By
It is odd number in sub-honeycomb structure number, sub-honeycomb structure 33 has individual relative density.Each sub-honeycomb structure relative density
Changing rule is as shown in Figure 4.It, can under the premise of the number of the whole relative density of honeycomb and sub-honeycomb structure is given
Honeycomb parameter is designed by following steps and predicts its intensity.
As shown in figure 5, a kind of porous material strength such as aforementioned energy absorption device of the present invention determines method, including walk as follows
It is rapid:
(10) relative density disaggregation calculates: according to gradient porous material relative density theoretical model, calculating relative density solution
Collection；
(10) the relative density disaggregation calculates step specifically, being calculated as follows to obtain relative density disaggregation:
Wherein Δ ρiFor the relative density of i-th of sub- porous material, Δ ρHFor the whole relative density of porous material, A, B,
C forms constraint matrix, and wherein A is constraint matrix, and B is symmetry constraint matrix, and C is gradient constraint matrix.Wherein
Wherein n is the number of sub- porous material, and int () indicates to be rounded downwards, and up () expression rounds up.When the columns of B
When for odd number, there is 0 vector of a column at center.When the columns of C is less than or equal to 4, it is not present.
(20) relative density determines: different solution and its corresponding gradient factor is concentrated according to relative density solution, determining should
Solve the relative density of corresponding porous material；
(20) relative density can solve after determining step specifically, determining the gradient factor of porous material as the following formula
It is focused to find out to obtain the homographic solution of the relative density of porous material:
(30) cell parameter calculates: calculating porous material tubular body according to even porous material relative density theoretical model
The value of gradient control parameter.
(30) the cell element gradient control parameter can be by the relative density theoretical model Δ ρ of even porous materiali=f (a,
B, c) it is Converse solved obtain, wherein a, b, c are porous material Cellular structure parameter.
(40) coefficient of intensification calculates: according to cell parameter and the corresponding tradition with same overall and relative density
The structural parameters of even porous material calculate coefficient of intensification；
(40) coefficient of intensification can be by formula ξ=g (a, b, c, Li,w1,w2) be calculated.Wherein LiFor the porous material of son
Expect i width in the horizontal direction, w1And w2It is porous material in length both vertically as well as horizontally.
(50) structural strength determines: according to the yield stress of coefficient of intensification and raw material, the knot of porous material is calculated
Structure intensity.
(50) structural strength determines step specifically, being calculated as follows to obtain the structural strength of porous material:
Wherein,To have the even porous material of identical size and whole relative density with porous material in the present invention
Intensity.
Claims (10)
1. a kind of high intensity, porous material energy absorption device, including support plate (2), maneuvering board (1) and upper end and support plate (2)
It is connected, the porous material (3) that lower end is connected with maneuvering board (1), the porous material (3) is folded by multiple rows of horizontal positioned tubular body
It sets, each tubular body (4) axis is parallel to each other and in the same plane in each row, successively side by side close to placement, feature
It is:
In every row's tubular body (4), central axis of the structure size and relative density of each tubular body (4) relative to porous material
(5) it is arranged symmetrically, the presence in every row's tubular body (4), between the adjacent tubular body (4) of central axis (5) side setting
Relative density difference.
2. energy absorption device according to claim 1, it is characterised in that:
In every row's tubular body (4), the relative density difference between the adjacent tubular body (4) of central axis (5) side setting is
Definite value.
3. energy absorption device according to claim 2, it is characterised in that:
The central axis (5) respectively arranged is in the same plane.
4. energy absorption device according to claim 2, it is characterised in that:
Tubular body (4) section is in any periods planforms such as regular hexagon, circle or squares.
5. a kind of porous material strength of the energy absorption device as described in one of Claims 1-4 determines method, which is characterized in that
Include the following steps:
(10) relative density disaggregation calculates: according to gradient porous material relative density theoretical model, calculating relative density disaggregation；
(20) relative density determines: concentrating different solution and its corresponding gradient factor according to relative density solution, determines the solution pair
The relative density for the porous material answered；
(30) cell parameter calculates: the gradient of porous material tubular body is calculated according to even porous material relative density theoretical model
The value of control parameter.
(40) coefficient of intensification calculates: according to cell parameter and the corresponding conventional uniform with same overall and relative density
The structural parameters of porous material calculate coefficient of intensification；
(50) structural strength determines: according to the yield stress of coefficient of intensification and raw material, the structure that porous material is calculated is strong
Degree.
6. porous material strength according to claim 5 determines method, which is characterized in that (10) the relative density disaggregation
Step is calculated specifically, being calculated as follows to obtain relative density disaggregation:
Wherein Δ ρiFor the relative density of i-th of sub- porous material, Δ ρHFor the whole relative density of porous material, A, B, C composition
Constraint matrix, wherein A is constraint matrix, and B is symmetry constraint matrix, and C is gradient constraint matrix.Wherein
Wherein n is the number of sub- porous material, and int () indicates to be rounded downwards, and up () expression rounds up.When the columns of B is surprise
When number, there is 0 vector of a column at center.When the columns of C is less than or equal to 4, it is not present.
7. porous material strength according to claim 6 determines method, which is characterized in that (20) relative density determines
Step in solution after the gradient factor of determining porous material specifically, can be focused to find out to obtain the relatively close of porous material as the following formula
The homographic solution of degree:
8. porous material strength according to claim 7 determines method, which is characterized in that (30) the cell element gradient control
Parameter can be by the relative density theoretical model Δ ρ of even porous materiali=f (a, b, c) is Converse solved to be obtained, and wherein a, b, c are
Porous material Cellular structure parameter.
9. porous material strength according to claim 8 determines method, which is characterized in that (40) coefficient of intensification can be by
Formula ξ=g (a, b, c, Li,w1,w2) be calculated.Wherein LiFor sub- porous material i width in the horizontal direction, w1And w2It is more
Porous materials are in length both vertically as well as horizontally.
10. porous material strength according to claim 9 determines method, which is characterized in that (50) structural strength is true
Step is determined specifically, being calculated as follows to obtain the structural strength of porous material:
Wherein,To have the strong of the even porous material of identical size and whole relative density with porous material in the present invention
Degree.
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110948878A (en) * | 2019-11-19 | 2020-04-03 | 中国科学技术大学 | Explosion gradient-imitating polycell bullet and design and manufacture method thereof |
| CN114379488A (en) * | 2022-01-24 | 2022-04-22 | 中南大学 | Bionic gradient multi-stage tubular structure |
Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US7195638B1 (en) * | 2002-12-30 | 2007-03-27 | Advanced Cardiovascular Systems, Inc. | Catheter balloon |
| CN102261415A (en) * | 2011-05-11 | 2011-11-30 | 北京交通大学 | Method for controlling energy absorbing capacity of gradient porous material |
-
2018
- 2018-09-04 CN CN201811024028.3A patent/CN109284542B/en active Active
Patent Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US7195638B1 (en) * | 2002-12-30 | 2007-03-27 | Advanced Cardiovascular Systems, Inc. | Catheter balloon |
| CN102261415A (en) * | 2011-05-11 | 2011-11-30 | 北京交通大学 | Method for controlling energy absorbing capacity of gradient porous material |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110948878A (en) * | 2019-11-19 | 2020-04-03 | 中国科学技术大学 | Explosion gradient-imitating polycell bullet and design and manufacture method thereof |
| CN110948878B (en) * | 2019-11-19 | 2022-07-15 | 中国科学技术大学 | Explosion gradient-imitating polycell bullet and design and manufacture method thereof |
| CN114379488A (en) * | 2022-01-24 | 2022-04-22 | 中南大学 | Bionic gradient multi-stage tubular structure |
| CN114379488B (en) * | 2022-01-24 | 2024-03-08 | 中南大学 | Bionic gradient multistage tubular structure |
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