CN112065905A - Light composite structure with high energy absorption efficiency - Google Patents
Light composite structure with high energy absorption efficiency Download PDFInfo
- Publication number
- CN112065905A CN112065905A CN202010707608.3A CN202010707608A CN112065905A CN 112065905 A CN112065905 A CN 112065905A CN 202010707608 A CN202010707608 A CN 202010707608A CN 112065905 A CN112065905 A CN 112065905A
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- China
- Prior art keywords
- shell
- porous material
- energy absorption
- high energy
- absorption efficiency
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Classifications
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16F—SPRINGS; SHOCK-ABSORBERS; MEANS FOR DAMPING VIBRATION
- F16F7/00—Vibration-dampers; Shock-absorbers
- F16F7/12—Vibration-dampers; Shock-absorbers using plastic deformation of members
- F16F7/121—Vibration-dampers; Shock-absorbers using plastic deformation of members the members having a cellular, e.g. honeycomb, structure
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16F—SPRINGS; SHOCK-ABSORBERS; MEANS FOR DAMPING VIBRATION
- F16F7/00—Vibration-dampers; Shock-absorbers
- F16F7/12—Vibration-dampers; Shock-absorbers using plastic deformation of members
- F16F7/128—Vibration-dampers; Shock-absorbers using plastic deformation of members characterised by the members, e.g. a flat strap, yielding through stretching, pulling apart
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- Engineering & Computer Science (AREA)
- General Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Devices Affording Protection Of Roads Or Walls For Sound Insulation (AREA)
Abstract
The invention provides a light composite structure with high energy absorption efficiency, and relates to the technical field of light structure design. The structure consists of a shell and a porous material, and the porous material and the shell are combined seamlessly. As shown in the attached drawings, the structure has a layered configuration along a first direction, each layer of shell has rectangular cavities which are periodically arranged along a second direction, and the cavities are filled with the porous material; the rectangular cavities of two adjacent layers are staggered along the first direction; wherein the first direction and the second direction are perpendicular to each other. When the structure is under the action of compressive load or impact force, the interaction of the shell and the porous material is enhanced through the layered staggered structural form of the cavity of the shell, and the energy absorption capacity of the structure is improved.
Description
Technical Field
The application relates to the technical field of light structure design, in particular to a light composite structure with high energy absorption efficiency.
Background
With the development of industrial technology, people put higher demands on the protection of personal lives and properties, precision instruments and public facilities, and the protective structures are required to have good crashworthiness. In general, structural crashworthiness is positively correlated with its mass. However, increasing the mass tends to increase the economic cost. Porous materials are often used in protective structure design because of their light weight and high specific energy absorption. Researchers have found that the porous material and the shell are bonded together. When the shell is compressed or impacted, an interaction can be generated between the shell and the porous material, and the energy absorption efficiency of the whole structure can be improved. In patent CN107448528A, a composite light structure with high energy absorption rate and good buffering capacity is disclosed, and a porous structure is filled in a spherical shell structure, so that the energy absorption efficiency is improved. However, in the current porous filling sandwich structure or porous filling shell structure, the structural form of the shell is relatively single, and the shell is usually a conventional square shell, a circular tube and the like. In order to fully utilize the interaction between the shell and the porous material and further improve the energy absorption performance of the whole structure, further innovation needs to be carried out on the structural form of the shell.
It is to be noted that the information disclosed in the above background section is only for enhancement of understanding of the background of the present application and therefore may include information that does not constitute prior art known to a person of ordinary skill in the art.
Disclosure of Invention
In order to avoid the defects in the prior art, the invention provides a light composite structure with high energy absorption efficiency; the structure form of the shell cavity layer-shaped staggered structure is utilized, and when the shell is impacted, the structure enhances the interaction between the shell and the porous material through the structure form, and the energy absorption capacity is improved.
The technical scheme adopted by the invention for solving the technical problems is as follows: comprises a shell and a porous material, and is characterized in that the shell is of a layered structure and is provided with a cavity; the porous material is composed of rods and surfaces and has a periodic structure with a certain porosity; or the porous material is a random porous structure consisting of rods and surfaces and having a certain porosity.
The light composite structure with high energy absorption efficiency is characterized in that the structural shell is provided with a cavity, the shell has a layered structure in a first direction, and the rectangular cavities of each layer of shell are periodically arranged along a second direction; the rectangular cavities of two adjacent layers are staggered along the first direction; wherein the first direction and the second direction are perpendicular to each other. The porous material is filled in the rectangular cavity of the shell and is seamlessly combined with the shell.
Has the beneficial effects.
The invention provides a light composite structure with high energy absorption efficiency. The structure consists of a shell and a porous material, wherein the porous material and the shell are combined in a seamless mode. The structural shell has a layered configuration in a first direction as shown in fig. 1, and each layer has rectangular cavities arranged periodically in a second direction. The rectangular cavities in two adjacent layers along the first direction are arranged in parallel and staggered in the same plane. The porous material is filled in the cavity and is seamlessly combined with the cavity. The first direction and the second direction are perpendicular to each other. Under impact compression loading. The exquisite structural form of the shell makes full use of the interaction between the shell and the porous material. The energy absorption efficiency of the whole structure is improved.
Drawings
The light composite structure with high energy absorption efficiency of the present invention will be further described with reference to the accompanying drawings and embodiments.
FIG. 1 is a schematic view of a high energy absorption efficiency lightweight composite structure of the present invention;
FIG. 2 is a partial schematic view of a light composite structure with high energy absorption efficiency according to the present invention
FIG. 3 is a schematic view of the process of filling the porous material into the shell according to the present invention;
FIG. 4 is a schematic representation of an exemplary porous material of the present invention
1. Case 2. porous material
Detailed Description
The embodiment is a light composite structure with high energy absorption efficiency.
Referring to fig. 1 to 2, the present embodiment is a light composite structure with high energy absorption efficiency, which is composed of a shell and a porous material. The housing has a cavity. The porous material is composed of rods and surfaces and has a periodic structure with a certain porosity; or a random porous structure consisting of rods and surfaces and having a certain porosity. The shell is seamlessly integrated with the porous material.
In this embodiment, the housing 1 has a layered configuration along a first direction (Y direction shown in fig. 1), and each layer has rectangular cavities arranged periodically along a second direction (Z direction shown in fig. 1) in each layer, wherein the cavities have a width a, a length b, and a thickness t (shown in fig. 2). There are rectangular cavities arranged periodically in the same layer along a second direction (the Z direction as shown in fig. 2), and the rectangular cavities are spaced at 2t intervals. As shown in fig. 2, the cavities in two adjacent layers along the first direction are arranged in parallel and staggered in the same plane, and the relative staggered distance m, ranges from 0.3 × b to 0.7 × b. The cavity of the shell 1 is filled with the porous material 2, and the shell 1 and the porous material 2 are combined seamlessly. Wherein the first direction is perpendicular to the second direction
Fig. 3 shows an exemplary filling of the porous material 2 into the cavity of the housing.
Fig. 4 schematically illustrates a porous material. The porous material is a periodic structure with a certain porosity and composed of rods and surfaces, as shown in FIG. 4; or the porous material has a random porous structure with a certain porosity composed of rods and surfaces.
In the embodiment of the invention, the cavities of different layers of the shell are arranged in a staggered mode, and the porous material is filled in the cavities of the shell and is seamlessly combined with the shell. When the shell is impacted, the interaction between the shell and the porous material is enhanced through the unique structural form of the shell. So that the structure has efficient energy absorption performance.
Claims (4)
1. The utility model provides a high energy-absorbing efficiency's light composite construction comprises casing and porous material, its characterized in that includes:
a housing having a cavity;
and the porous material is filled in the cavity of the shell and is seamlessly combined with the shell.
2. The high energy-absorbing efficiency, lightweight composite structure according to claim 1, wherein the shell has cavities, the shell having a layered configuration in a first direction, each layer of the shell having rectangular cavities arranged periodically in a second direction; the rectangular cavities of two adjacent layers are staggered along the first direction; wherein the first direction and the second direction are perpendicular to each other.
3. The high energy absorption efficiency, lightweight composite structure according to claim 1, wherein said porous material is a periodic structure of rods, faces, with a certain porosity; or the porous material is a random porous structure with a certain porosity and composed of rods and surfaces.
4. The high energy absorption efficiency lightweight composite structure according to claim 1, wherein the structure has a laminar configuration in a first direction, each shell has rectangular cavities arranged periodically in a second direction, the cavities are filled with said porous material, and the porous material is seamlessly bonded to the shell; the rectangular cavities of two adjacent layers are staggered along the first direction; wherein the first direction and the second direction are perpendicular to each other.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010707608.3A CN112065905A (en) | 2020-07-21 | 2020-07-21 | Light composite structure with high energy absorption efficiency |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010707608.3A CN112065905A (en) | 2020-07-21 | 2020-07-21 | Light composite structure with high energy absorption efficiency |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN112065905A true CN112065905A (en) | 2020-12-11 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202010707608.3A Pending CN112065905A (en) | 2020-07-21 | 2020-07-21 | Light composite structure with high energy absorption efficiency |
Country Status (1)
| Country | Link |
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| CN (1) | CN112065905A (en) |
Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| FR2962390A1 (en) * | 2010-07-12 | 2012-01-13 | Citi Technologies | Shock absorber i.e. bumper, for use in automobile, has cells delimited by side walls and internal ribs forming body to ensure absorption of shocks along main direction and extrusion direction perpendicular to main direction |
| CN206386431U (en) * | 2017-01-11 | 2017-08-08 | 深圳市乾行达科技有限公司 | A kind of staggered porous energy absorber |
| CN207213023U (en) * | 2017-08-07 | 2018-04-10 | 江苏优纳优盛新材料有限公司 | A kind of anti-oblique impact crash energy absorption equipment |
| CN111255838A (en) * | 2020-01-17 | 2020-06-09 | 重庆大学 | Hierarchical lattice structure |
-
2020
- 2020-07-21 CN CN202010707608.3A patent/CN112065905A/en active Pending
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| FR2962390A1 (en) * | 2010-07-12 | 2012-01-13 | Citi Technologies | Shock absorber i.e. bumper, for use in automobile, has cells delimited by side walls and internal ribs forming body to ensure absorption of shocks along main direction and extrusion direction perpendicular to main direction |
| CN206386431U (en) * | 2017-01-11 | 2017-08-08 | 深圳市乾行达科技有限公司 | A kind of staggered porous energy absorber |
| CN207213023U (en) * | 2017-08-07 | 2018-04-10 | 江苏优纳优盛新材料有限公司 | A kind of anti-oblique impact crash energy absorption equipment |
| CN111255838A (en) * | 2020-01-17 | 2020-06-09 | 重庆大学 | Hierarchical lattice structure |
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Application publication date: 20201211 |