CN114394058A - Curved surface paper folding tube structure with good buffering energy-absorbing characteristic - Google Patents
Curved surface paper folding tube structure with good buffering energy-absorbing characteristic Download PDFInfo
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- CN114394058A CN114394058A CN202111623431.XA CN202111623431A CN114394058A CN 114394058 A CN114394058 A CN 114394058A CN 202111623431 A CN202111623431 A CN 202111623431A CN 114394058 A CN114394058 A CN 114394058A
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- curved
- good buffering
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- folding unit
- arc
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- 230000003139 buffering effect Effects 0.000 title claims abstract description 22
- 239000000463 material Substances 0.000 claims description 9
- 229910001220 stainless steel Inorganic materials 0.000 claims description 5
- 239000010935 stainless steel Substances 0.000 claims description 5
- 238000010146 3D printing Methods 0.000 claims description 3
- 239000002184 metal Substances 0.000 claims description 3
- 244000062793 Sorghum vulgare Species 0.000 claims 3
- 235000019713 millet Nutrition 0.000 claims 3
- 230000002093 peripheral effect Effects 0.000 abstract description 3
- 238000010521 absorption reaction Methods 0.000 description 11
- 238000007906 compression Methods 0.000 description 6
- 230000006835 compression Effects 0.000 description 5
- 238000013461 design Methods 0.000 description 5
- 238000006073 displacement reaction Methods 0.000 description 5
- 238000004088 simulation Methods 0.000 description 3
- 238000000034 method Methods 0.000 description 2
- 238000012986 modification Methods 0.000 description 2
- 230000004048 modification Effects 0.000 description 2
- 238000006467 substitution reaction Methods 0.000 description 2
- 238000005452 bending Methods 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 238000002474 experimental method Methods 0.000 description 1
- 238000011160 research Methods 0.000 description 1
- 230000007704 transition Effects 0.000 description 1
Images
Classifications
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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
-
- 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
- B60R19/04—Bumpers, i.e. impact receiving or absorbing members for protecting vehicles or fending off blows from other vehicles or objects formed from more than one section in a side-by-side arrangement
- B60R19/14—Bumpers, i.e. impact receiving or absorbing members for protecting vehicles or fending off blows from other vehicles or objects formed from more than one section in a side-by-side arrangement having folding parts
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B61—RAILWAYS
- B61F—RAIL VEHICLE SUSPENSIONS, e.g. UNDERFRAMES, BOGIES OR ARRANGEMENTS OF WHEEL AXLES; RAIL VEHICLES FOR USE ON TRACKS OF DIFFERENT WIDTH; PREVENTING DERAILING OF RAIL VEHICLES; WHEEL GUARDS, OBSTRUCTION REMOVERS OR THE LIKE FOR RAIL VEHICLES
- B61F19/00—Wheel guards; Bumpers; Obstruction removers or the like
- B61F19/04—Bumpers or like collision guards
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B64—AIRCRAFT; AVIATION; COSMONAUTICS
- B64D—EQUIPMENT FOR FITTING IN OR TO AIRCRAFT; FLIGHT SUITS; PARACHUTES; ARRANGEMENTS OR MOUNTING OF POWER PLANTS OR PROPULSION TRANSMISSIONS IN AIRCRAFT
- B64D45/00—Aircraft indicators or protectors not otherwise provided for
-
- 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
- B60R2019/026—Buffers, i.e. bumpers of limited extent
-
- 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
- B60R2019/1806—Structural beams therefor, e.g. shock-absorbing
- B60R2019/1813—Structural beams therefor, e.g. shock-absorbing made of metal
Abstract
The utility model provides a curved surface paper folding tube structure with good buffering energy-absorbing characteristic, includes pipy folding unit, folding unit comprises the folded sheet that the polylith connected gradually, connects through valley book between two adjacent folded sheets, and the folded sheet includes through mountain book first cell board and the second cell board of connecting, and valley book and mountain book are arranged along folding unit's peripheral direction in turn, and valley book and mountain book all are the curve form. The folding unit is provided with a plurality of curved surface structures, and the folding unit is provided with a plurality of plane structures which are formed by linear creases and have stronger bearing capacity, thus belonging to the technical field of buffering.
Description
Technical Field
The invention relates to the technical field of buffering, in particular to a curved surface paper folding tube structure with good buffering and energy absorbing characteristics.
Background
In practical engineering applications, such as automobiles, trains, airplanes, etc., having energy absorbing devices for reducing damage caused in traffic collision accidents, generally speaking, in order to obtain an ideal energy absorbing device, a thin-walled tube is usually selected as an ideal model, and in a crashworthiness design, the structure has a lower initial peak force and a lower average crushing force.
The existing research shows that the thin-walled tube with the paper folding pattern can effectively reduce the initial peak force and improve the energy absorption capacity, and the structure is simple to prepare. However, the conventional paper folding tube structure mainly focuses on linear creases, namely, only one mode of fixing the creases between two vertexes limits the degree of freedom of structural design, and further causes the energy absorption capacity of the paper folding tube to be limited.
Disclosure of Invention
Aiming at the technical problems in the prior art, the invention aims to: the curved surface paper folding pipe structure has strong energy absorption capacity and good buffering and energy absorption characteristics.
In order to achieve the purpose, the invention adopts the following technical scheme: the utility model provides a curved surface paper folding tube structure with good buffering energy-absorbing characteristic, includes pipy folding unit, folding unit comprises the folded sheet that the polylith connected gradually, connects through valley book between two adjacent folded sheets, and the folded sheet includes through mountain book first cell board and the second cell board of connecting, and valley book and mountain book are arranged along folding unit's peripheral direction in turn, and valley book and mountain book all are the curve form.
After the structure is adopted, various crease bending forms between two points can be realized by adopting the curved crease, the design freedom degree of the paper folding tube structure is greatly improved, the energy absorption capacity of the paper folding tube structure is favorably further improved, the curved crease is adopted, the folding units form a plurality of curved surface structures, and the bearing capacity of the folding device is stronger compared with a plurality of plane structures formed by linear creases.
Preferably, the mountain fold comprises two first arc line segments, the adjacent first arc line segments are connected through a first connecting segment, and the two first arc line segments are symmetrical to each other; the valley fold comprises two second arc line sections, the adjacent second arc line sections are connected through a second connecting section, and the two second arc line sections are symmetrical to each other.
Preferably, the first connecting section and the second connecting section are both circular arc-shaped.
Preferably, the folding plates include a first edge line and a second edge line respectively connecting two adjacent folding plates; in each folding plate, the bulge of the first arc line segment faces the second edge line, the starting position of the mountain fold is the same as that of the first edge line, and the end position of the mountain fold is the same as that of the first edge line.
Preferably, the curvature of the first arc segment is greater than the curvature of the second arc segment.
Preferably, the first arc segment is smoothly connected with the first connecting segment, and the second arc segment is smoothly connected with the second connecting segment.
As a preference, the folding unit consists of 6 folding plates.
Preferably, the material of the folding unit is metal.
Preferably, the material of the folding unit is 316L stainless steel.
As a preference, the folding unit is made by 3D printing.
In summary, the present invention has the following advantages: the structure of the invention is light, and the curved crease form is adopted to improve the freedom degree of the structural design, the curved crease form is changed, the buckling instability process of the curved plate of the curved paper folding tube structure when stressed is changed, the adjustment of the buffering and energy absorbing characteristics of the curved paper folding tube structure is realized, and the type requirement can be better adapted; the curved crease lines form a plurality of curved surfaces, so that the bearing capacity is higher; the arc-shaped connecting section in the middle of the folding line is in transition, so that the problem of stress concentration generated during folding is avoided, and the energy absorption capacity of the whole folding unit is improved.
Drawings
Fig. 1 is a perspective view of a folding unit.
Fig. 2 is a plan view of the folded plate after being unfolded.
Fig. 3 is a plan view of the folded unit after being unfolded.
Fig. 4 is a schematic diagram of design parameters of a folding plate.
FIG. 5 is w1Force-displacement curve obtained by quasi-static compression simulation of the folding unit when the folding unit is 10 mm.
FIG. 6 shows a variation w1And carrying out quasi-static compression simulation on the folding unit to obtain a force-displacement curve chart
Wherein, 1 is mountain fold, 2 is valley fold, 3 is first edge line, 4 is second edge line, and 5 is boundary line. 11 is a first arc segment, 12 is a first connecting segment, 21 is a second arc segment, and 22 is a second connecting segment.
Detailed Description
The present invention will be described in further detail with reference to the accompanying drawings and detailed description.
Example one
As shown in figures 1 and 2, a curved surface paper folding tube structure with good buffering energy-absorbing characteristic, includes pipy folding unit, and folding unit comprises the folded sheet that the polylith connected gradually, connects through valley book between two adjacent folded sheets, and the folded sheet includes through mountain book first unit board and the second unit board of connecting, valley book and mountain book arrange in turn along folding unit's peripheral direction, valley book and mountain book all are the curve form.
The mountain fold comprises two first arc line sections, adjacent first arc line sections are connected through a first connecting section, and the two first arc line sections are symmetrical to each other; the valley fold comprises two second arc line sections, the adjacent second arc line sections are connected through a second connecting section, and the two second arc line sections are symmetrical to each other.
The first connecting section and the second connecting section are both arc-shaped.
The folding plates comprise a first edge line and a second edge line which are respectively connected with two adjacent folding plates; in each folding plate, the bulge of the first arc line segment faces the second edge line, the starting position of the mountain fold is the same as that of the first edge line, and the end position of the mountain fold is the same as that of the first edge line. The folding plate further comprises two boundary lines at both ends.
The curvature of the first arc segment is greater than the curvature of the second arc segment.
The first arc line segment is smoothly connected with the first connecting segment, and the second arc line segment is smoothly connected with the second connecting segment.
The folding unit consists of 6 folding plates.
The material of the folding unit is metal.
The material of the folding unit is 316L stainless steel.
The folding unit is made by 3D printing.
The curved surface paper folding tube structure with good buffering and energy absorbing characteristics can be implemented in the following mode.
The method comprises the following steps: the folding plate is used as a basic unit to set geometrical parameters, as shown in FIG. 3, in an xy coordinate system, the half height of the folding plate is set to be 2h, and the distances from valley fold and mountain fold to the x axis are respectively set to be w1，w2In order to eliminate the influence of stress concentration, the valley fold and the mountain fold are respectively rounded at symmetrical positions to respectively form a first connecting section and a second connecting section which are in a shape of a circular horn, and the radius of the first connecting section and the radius of the second connecting section are respectively r1And r2And (4) showing.
Step two: according to the geometric parameters of the basic unit, the valley fold line and the mountain fold line of the folded unit can be expressed by the following equations:
step three: in order to avoid the intersection of valley fold and mountain fold, the alternating arrangement between the two is not changed, so that w1＜w2. The margin width of one folding plate is limited to w. Let r1、r2The ratio to the half height of the cell 2h is a constant value k1And k2The following formula is given.
Let k1＝3.375，k2＝9。
As shown in FIG. 4, W is the perimeter of the upper and lower bottom surfaces of the folding unit, and H is the height of the folding unit. N is a radical ofxThe number of the folded plates in the x-axis direction, NyThe number of the folding plates in the y-axis direction.
The values of the geometric parameters are as follows: 67.5mm for 2h, 40mm for w, w2＝30mm，w1＝10mm，Nx＝6，Ny＝1。
The folding unit is made of 316L stainless steel material with good ductility. Tensile experiments were performed on 316L stainless steel material to obtain material property parameters. Establishing the finite element model of the curved surface paper folding tube structure with the buffer energy absorption characteristic, and performing quasi-static compression simulation on the finite element model by using Abaqus finite element simulation software to obtain a force-displacement curve shown in figure 5. As can be seen from the curve, in the initial compression process, the curved surface paper folding tube structure obtains the initial peak force; along with the increase of the compression displacement, the peak force is reduced to a relatively stable range, and in the range, the curved paper folding pipe is in a stable compression state, so that effective energy absorption can be realized; and finally, the curved paper folding tube structure enters a crushing stage. The shaded area in fig. 5 represents the effective energy absorption area, and it can be found that the curved origami structure has better energy buffering capacity.
Changing the key geometric parameter w under the condition of ensuring other parameters to be consistent with the initial two-dimensional plane structure1Which were set to 5mm and 10mm, respectively, and a force-displacement curve as shown in fig. 6 was obtained, and the results showed that w was1Area ratio w of effective energy absorption area when the thickness is 10mm1Greater at 5mm, i.e. greater ability to absorb energy. Therefore, the energy absorption capacity of the curved surface paper folding pipe structure can be conveniently adjusted by simply changing the position of the curved surface folding line.
The above embodiments are preferred embodiments of the present invention, but the present invention is not limited to the above embodiments, and any other changes, modifications, substitutions, combinations, and simplifications which do not depart from the spirit and principle of the present invention should be construed as equivalents thereof, and all such changes, modifications, substitutions, combinations, and simplifications are intended to be included in the scope of the present invention.
Claims (10)
1. The utility model provides a curved surface folded paper tube structure with good buffering energy-absorbing characteristic which characterized in that: including pipy folding unit, folding unit comprises the folded sheet that the polylith connected gradually, connects through the millet between two adjacent folded sheets, and the folded sheet includes through mountain roll over first cell board and the second cell board of connecting, and the millet is rolled over and mountain is rolled over the periphery direction along folding unit and is arranged in turn, and the millet is rolled over and mountain is rolled over all to be the curve form.
2. The curved origami structure with good buffering and energy absorbing characteristics as claimed in claim 1, wherein: the mountain fold comprises two first arc line sections, adjacent first arc line sections are connected through a first connecting section, and the two first arc line sections are symmetrical to each other;
the valley fold comprises two second arc line sections, the adjacent second arc line sections are connected through a second connecting section, and the two second arc line sections are symmetrical to each other.
3. The curved origami structure with good buffering and energy absorbing characteristics as claimed in claim 2, wherein: the first connecting section and the second connecting section are both arc-shaped.
4. The curved origami structure with good buffering and energy absorbing characteristics as claimed in claim 2, wherein: the folding plates comprise a first edge line and a second edge line which are respectively connected with two adjacent folding plates; in each folding plate, the bulge of the first arc line segment faces the second edge line, the starting position of the mountain fold is the same as that of the first edge line, and the end position of the mountain fold is the same as that of the first edge line.
5. The curved origami structure with good buffering and energy absorbing characteristics as claimed in claim 2, wherein: the curvature of the first arc segment is greater than the curvature of the second arc segment.
6. The curved origami structure with good buffering and energy absorbing characteristics as claimed in claim 2, wherein: the first arc line segment is smoothly connected with the first connecting segment, and the second arc line segment is smoothly connected with the second connecting segment.
7. The curved origami structure with good buffering and energy absorbing characteristics as claimed in claim 1, wherein: the folding unit consists of 6 folding plates.
8. The curved origami structure with good buffering and energy absorbing characteristics as claimed in claim 1, wherein: the material of the folding unit is metal.
9. The curved origami structure with good buffering and energy absorbing characteristics as claimed in claim 8, wherein: the material of the folding unit is 316L stainless steel.
10. The curved origami structure with good buffering and energy absorbing characteristics as claimed in claim 1, wherein: the folding unit is made by 3D printing.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202111623431.XA CN114394058A (en) | 2021-12-28 | 2021-12-28 | Curved surface paper folding tube structure with good buffering energy-absorbing characteristic |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202111623431.XA CN114394058A (en) | 2021-12-28 | 2021-12-28 | Curved surface paper folding tube structure with good buffering energy-absorbing characteristic |
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|---|---|
| CN114394058A true CN114394058A (en) | 2022-04-26 |
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| CN202111623431.XA Pending CN114394058A (en) | 2021-12-28 | 2021-12-28 | Curved surface paper folding tube structure with good buffering energy-absorbing characteristic |
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Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US3995901A (en) * | 1974-06-24 | 1976-12-07 | E. I. Dupont De Nemours And Company | Energy-absorbing systems |
| US20050212328A1 (en) * | 1999-11-11 | 2005-09-29 | Michael Ashmead | Energy-absorbing structure |
| CN110696760A (en) * | 2019-11-07 | 2020-01-17 | 五邑大学 | Method and structure for realizing energy absorption structure of paper folding rib plate |
| CN111688297A (en) * | 2020-05-15 | 2020-09-22 | 西安交通大学 | Corrugated-folded paper multi-level sandwich energy absorption structure and preparation method thereof |
| CN112208677A (en) * | 2020-09-30 | 2021-01-12 | 广州大学 | Stack type paper folding structure with variable rigidity characteristic |
| CN214939641U (en) * | 2021-03-26 | 2021-11-30 | 华侨大学 | Corrugated energy absorption structure |
-
2021
- 2021-12-28 CN CN202111623431.XA patent/CN114394058A/en active Pending
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US3995901A (en) * | 1974-06-24 | 1976-12-07 | E. I. Dupont De Nemours And Company | Energy-absorbing systems |
| US20050212328A1 (en) * | 1999-11-11 | 2005-09-29 | Michael Ashmead | Energy-absorbing structure |
| CN110696760A (en) * | 2019-11-07 | 2020-01-17 | 五邑大学 | Method and structure for realizing energy absorption structure of paper folding rib plate |
| CN111688297A (en) * | 2020-05-15 | 2020-09-22 | 西安交通大学 | Corrugated-folded paper multi-level sandwich energy absorption structure and preparation method thereof |
| CN112208677A (en) * | 2020-09-30 | 2021-01-12 | 广州大学 | Stack type paper folding structure with variable rigidity characteristic |
| CN214939641U (en) * | 2021-03-26 | 2021-11-30 | 华侨大学 | Corrugated energy absorption structure |
Non-Patent Citations (1)
| Title |
|---|
| 徐依璐; 文桂林; 刘杰: "曲面折纸管超材料压缩力学性能研究", 第十八届全国非线性振动暨第十五届全国非线性动力学和运动稳定性学术会议（NVND2021）摘要集, pages 400 * |
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