CN203268650U - Triangular coplanar buffer structure with first two layers as rhombic layers - Google Patents
Triangular coplanar buffer structure with first two layers as rhombic layers Download PDFInfo
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- CN203268650U CN203268650U CN 201320240458 CN201320240458U CN203268650U CN 203268650 U CN203268650 U CN 203268650U CN 201320240458 CN201320240458 CN 201320240458 CN 201320240458 U CN201320240458 U CN 201320240458U CN 203268650 U CN203268650 U CN 203268650U
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Abstract
The utility model discloses a triangular coplanar buffer structure with the first two layers as rhombic layers. The triangular coplanar buffer structure comprises rhombic layers and triangular layers arranged from up down in sequence, through the arrangement of the rhombic layers as the two-dimensional grid of the first two layers, the membrane stress primary buffer structure is replaced by the bending stress primary buffer structure, so as to enable the initial peak stress of the elastic deformation end to be close to corresponding average peak dynamic stress, and avoid the condition that an object to-be-protected is damaged when the excellent buffer performance of a standard two-dimensional triangular coplanar buffer structure material does not being fully expressed.
Description
Technical field
The utility model belongs to buffering package fail-safe structure technical field, is specifically related to a kind of front two-layer coplanar buffer structure of rhombic triangle that is.
Background technology
As the defensive aerated materials of a kind of buffering package, the regular triangle two-dimensional porous material is because having good buffering, sound insulation, performance widespread use in the fields such as aviation, packing, military affairs, building, traffic, Furniture manufacture such as heat insulation.The two-dimensional porous material of rule is different according to configuration, can be divided into triangle, quadrangle, hexagon, rhomboid, diamond etc. multiple.According to the coplanar difference of the stress kind of leading distortion when stressed, it is to lead two kinds for the membrane stress of advocating peace that the two-dimensional porous material of rule can be divided into flexure stress.Why the two-dimensional porous material of rule has good cushion characteristic, because its load-deformation curve is before elastic stage distortion densification later, thereby can keep certain level to fluctuate up and down and absorb large energy, this one-phase is called " platform area deformation stage ", and the steady component of stress value in this stage is referred to as " average peak stress ".Flexure stress is main padded coaming at the initial peak stress at elastic deformation end close to average peak stress, and membrane stress to be main padded coaming can reach very high initial peak stress at the elastic stage end, buckling stress then occuring sharply reduce, fluctuates up and down until closely knit around the average peak stress level at last.Such feature makes membrane stress be main padded coaming distortion initially can produce a very large Percussion counter-force, just cause in the situation of not giving full play to its good cushion characteristic by the impaired situation of protection object thereby occur in.The regular triangle two-dimensional porous material is that a kind of typical membrane stress is main coplanar buffer structure material, just has such feature.For this material, must take measures in actual applications, avoid the generation of this kind situation.
The utility model content
The purpose of this utility model is to provide a kind of front two-layer for the coplanar buffer structure of rhombic triangle, has solved the two-dimentional triangular multi-hole material of existing rule in actual applications in the situation that do not give full play to its good cushion characteristic and just cause by the impaired problem of protection object.
The technical scheme that the utility model adopts is, a kind of front two-layer be the coplanar buffer structure of rhombic triangle, comprise the oblique side's layer and the triangular lamella that set gradually from top to bottom.
Characteristics of the present utility model also are,
Oblique side's layer wherein is provided with two-layer.
Triangular lamella wherein be provided with two-layer or two-layer more than.
On the feature unit horizontal direction of oblique side's layer wherein, cornerwise length is l, and on impact direction, cornerwise length is lsin θ, and θ is 60 degree.
The feature unit extended corner of triangular lamella wherein is 60 degree.
The beneficial effects of the utility model are, be the rhomboid two-dimensional grid by changing near two-layer triangle two-dimensional grid before impact end, making it is that main buffer structure material becomes take flexure stress as main buffer structure material by membrane stress, make the initial peak stress at material impact process Elastic distortion end compare corresponding average dynamic peak stress and greatly reduce, thereby avoided the coplanar buffer structure material of two-dimentional triangle in the situation that do not give full play to its good cushion characteristic and just cause by the impaired situation of protection object.
Description of drawings
Fig. 1 is structure and the impact figure of the coplanar buffer structure of regular two-dimentional triangle;
The coplanar impact load stress strain curve of the two-dimentional triangle buffer structure of rule figure when Fig. 2 is v=5m/s;
The coplanar impact load stress strain curve of the two-dimentional triangle buffer structure of rule figure when Fig. 3 is v=10m/s;
The coplanar impact load stress strain curve of the two-dimentional triangle buffer structure of rule figure when Fig. 4 is v=15m/s;
Fig. 5 be two-layer before the utility model be the structural representation of rhombic buffer structure;
Two-layer for the coplanar impact load stress strain curve figure of rhombic buffer structure before when Fig. 6 is v=5m/s;
Two-layer for the coplanar impact load stress strain curve figure of rhombic buffer structure before when Fig. 7 is v=10m/s;
Two-layer for the coplanar impact load stress strain curve figure of rhombic buffer structure before when Fig. 8 is v=15m/s.
In figure, 1. tiltedly side's layer, 2. triangular lamella.
The specific embodiment
Below in conjunction with the drawings and specific embodiments, the utility model is elaborated.
In engineering, the coplanar buffer structure of normally used two-dimentional triangle is regular configuration, its structure and coplanar as shown in Figure 1 stressed, perpendicular to paper, certain degree of depth is arranged, neighbouring two-layer being staggered, the hypotenuse of triangle character unit is long is l, the angle on hypotenuse and base is called extended corner θ=60 °, and the unit wall thickness is t uniformly, and the arrow direction is coplanar impact direction.The wall material of test article is selected " bilinearity " strain-hardening material---a certain aluminum alloy of insensibility of strain rate, and its mechanics parameter is: Young's modulus E
s=68.97GPa, yield stress σ
ys=292MPa, tangent rigidity E
tan=689.7MPa, Poisson's ratio v
s=0.35, density p
s=2700Kg/m
3Get l=3mm, t=0.1mm, when impact body velocity of impact v is respectively 5,10 and during three typical rate of 15m/s, as shown in Fig. 2-4, respective coplanar peak stress and initial peak stress value are as shown in table 1 respectively for the load-deformation curve of the coplanar buffer structure material interaction of regular triangle two dimension of impact body and this kind wall material.
As seen, its load-deformation curve has an obvious initial peak stress point at the elastic deformation end, and the corresponding initial peak stress of this point is apparently higher than the average peak stress of back platform area.So just be easy to produce foregoing, just cause by the impaired situation of protection object in the situation that do not give full play to its good cushion characteristic.
Regular triangle two dimension buffer structure under the different velocity of impacts of table 1 (l=3mm, t=0.1mm, θ=60 °) coplanar average dynamic peak stress and initial peak stress value
| Velocity of impact (m/s) | 5 | 10 | 15 |
| Average dynamic peak stress (MPa) | 1.0529 | 1.2248 | 1.2773 |
| Initial peak stress (MPa) | 6.4189 | 6.8018 | 6.2947 |
Two-layer before the utility model is rhombic buffer structure, be the rhomboid two-dimensional grid by changing near two-layer triangle two-dimensional grid before impact end, making it is that main buffer structure becomes take flexure stress as main buffer structure by membrane stress, its concrete structure comprises the oblique side's layer 1 and the triangular lamella 2 that set gradually from top to bottom as shown in Figure 5.Oblique side layer 1 is provided with two-layer, and triangular lamella 2 is provided with multilayer.
Compare the coplanar buffer structure of regular two-dimentional triangle, the front two-layer two-dimensional grid of close impact end is rhomboid, and tiltedly on side's layer 1 feature unit horizontal direction, cornerwise length is l, and on impact direction, cornerwise length is lsin θ, θ=60 degree; Be the triangle two-dimensional grid since the 3rd layer, the extended corner of triangular lamella 2 feature units still remains 60 degree, and total material wall thickness is even, is t.
The coplanar buffer structure of two-dimentional triangle that adopts extended corner to change, its wall material is selected " bilinearity " strain hardening aluminum alloy materials of insensibility of strain rate as above, when impact body velocity of impact v is respectively 5,10 and during three typical impact speed of 15m/s, as shown in Fig. 6-8, respective coplanar peak stress and initial peak stress value are as shown in table 2 respectively for the load-deformation curve of impact body and this coplanar buffer structure material interaction.
Two-layer before under the different velocity of impacts of table 2 is the coplanar buffer structure of rhombic two-dimentional triangle coplanar average dynamic peak stress and initial peak stress value
| Velocity of impact (m/s) | 5 | 10 | 15 |
| Average dynamic peak stress (MPa) | 1.0949 | 1.2660 | 1.3415 |
| Initial peak stress (MPa) | 2.5404 | 2.6119 | 2.5132 |
This shows, before two-layerly become take flexure stress as main buffer structure for the coplanar buffer structure of rhombic two-dimentional triangle, at the initial peak stress at impact process starting stage elastic deformation end close to corresponding average dynamic peak stress, when having avoided initial peak stress to arrive by the impaired situation of protection object, thereby guarantee that this material enters the platform area distortion smoothly in buffering course, give full play to its good cushion characteristic.
Claims (5)
1. two-layer before one kind is the coplanar buffer structure of rhombic triangle, it is characterized in that, comprises the oblique side's layer (1) and the triangular lamella (2) that set gradually from top to bottom.
According to claim 1 front two-layer be the coplanar buffer structure of rhombic triangle, it is characterized in that, described oblique side's layer (1) is provided with two-layer.
According to claim 1 front two-layer be the coplanar buffer structure of rhombic triangle, it is characterized in that, described triangular lamella (2) be provided with two-layer or two-layer more than.
According to claim 1 and 2 front two-layer be the coplanar buffer structure of rhombic triangle, it is characterized in that, on the feature unit horizontal direction of described oblique side's layer (1), cornerwise length is l, and on impact direction, cornerwise length is lsin θ, and θ is 60 degree.
According to claim 1 or 3 described front two-layer be the coplanar buffer structure of rhombic triangle, it is characterized in that, the feature unit extended corner of described triangular lamella (2) be 60 the degree.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201320240458 CN203268650U (en) | 2013-05-06 | 2013-05-06 | Triangular coplanar buffer structure with first two layers as rhombic layers |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201320240458 CN203268650U (en) | 2013-05-06 | 2013-05-06 | Triangular coplanar buffer structure with first two layers as rhombic layers |
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| Publication Number | Publication Date |
|---|---|
| CN203268650U true CN203268650U (en) | 2013-11-06 |
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| CN 201320240458 Expired - Fee Related CN203268650U (en) | 2013-05-06 | 2013-05-06 | Triangular coplanar buffer structure with first two layers as rhombic layers |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104535407A (en) * | 2014-12-25 | 2015-04-22 | 陕西科技大学 | Method for testing buffer performance of two-dimensional porous material under high-speed impact condition |
-
2013
- 2013-05-06 CN CN 201320240458 patent/CN203268650U/en not_active Expired - Fee Related
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104535407A (en) * | 2014-12-25 | 2015-04-22 | 陕西科技大学 | Method for testing buffer performance of two-dimensional porous material under high-speed impact condition |
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| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| C17 | Cessation of patent right | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20131106 Termination date: 20140506 |