CN-122015575-A - 8-Shaped paper folding buffering and energy absorbing structure

Abstract

The invention belongs to the technical field of impact resistance protection, and relates to a sandwich laminated composite structure, in particular to an 8-shaped paper folding buffer energy absorbing structure, which is formed by connecting strip-shaped thin plates in an 8-shaped rotary way to form a paper folding structure comprising m rings, wherein the end face of an initial end ring is in a regular n-shape, the structure consists of a plurality of triangular faces, parallelogram faces and trapezoid faces and forms a sandwich layer through geometric topological array arrangement.

Inventors

• XU BIN
• JI SHAOYONG
• WANG LILI
• GUO LIANG
• LI HONGBIN
• SHI CAOYANG
• CAI YI
• ZHAO JINHUI
• LIANG YONG
• HU YONGJUN
• XIE XIN
• YAN XU

Assignees

• 河北燕兴机械有限公司

Dates

Publication Date

20260512

Application Date

20260402

Claims (3)

1. 1. The 8-shaped paper folding buffering energy-absorbing structure is characterized by comprising a top plate (2), a bottom plate (3), a core layer (1) and a filling layer (4), wherein the core layer (1) is formed by connecting a strip-shaped structure in an 8-shaped rotation mode to form a double-ring structure, or is formed by sequentially connecting the strip-shaped structure in a plurality of 8-shaped rotation modes to form a serial multi-ring structure, and the serial multi-ring structures are distributed in a two-dimensional topological array mode to form the core layer (1).
2. 2. The '8' -shaped paper folding buffering and energy absorbing structure according to claim 1, wherein the ribbon structure is used for forming an '8' -shaped rotary structure with m rings, wherein m is more than or equal to 2, the end face of a first ring at the initial end is in a regular n-shaped form, n=3, 4 or 5, the ribbon structure is divided by edge lines to form 2nm-4m+6 faces, the rest is an isosceles triangle face except one isosceles trapezoid face and 2m-3 parallelogram faces, the bottom length of the isosceles triangle face is a, the waist length is c, the upper bottom length of the isosceles trapezoid face is b=a/[ 2cos (180 °/n) ], the lower bottom length is a+b, the upper side and the lower side of the parallelogram are a+b, and the left side and right side are c.
3. 3. The 8-shaped paper folding buffering and energy absorbing structure according to claim 1, wherein the ratio of the characteristic side length a to the wall thickness of the strip-shaped structure is 1 (0.01-0.2), and the structural material is a metal or nonmetal material with good plasticity, preferably 6-series aluminum alloy or 316L stainless steel.

Description

8-Shaped paper folding buffering and energy absorbing structure Technical Field The invention belongs to the technical field of dual-purpose protection of military and civil, and particularly relates to a splayed paper folding buffering and energy absorbing structure. The thin-wall energy-absorbing structure is used as a core layer of a sandwich composite structure, and is suitable for the fields of anti-impact protection of individual bulletproof clothes, helmets and the like, anti-impact wave protection armor of combat vehicles, anti-impact protection shells of missiles, packaging engineering and the like. Background The corrugated board is a classical impact-resistant protection structure as a typical sandwich composite board, and has good anti-falling buffering and energy-absorbing performances. The processing technology is simple, the cost is low, and the method is widely applied to the field of packaging engineering at present. The corrugated board forms a sandwich structure through the sandwich structure formed by the two layers of the panel clamping core layers, provides enough deformation stroke for impact, dissipates impact energy through plastic deformation of the core layers and the panel, and realizes effective protection of the protected structure. The prior corrugated board core layer adopts a triangular corrugated structure, a sine corrugated structure or a trapezoid corrugated structure. However, this type of structure has the following disadvantages: 1) The method has obvious peak load in the initial stage of crushing, and is easy to generate larger instantaneous deceleration to the protected object, thereby causing damage; 2) The core layer only forms a fixed plastic hinge line, the deformation mode is single, and the energy absorption capacity is limited; 3) It is difficult to meet the high protection requirements under strong impact loads. At present, in the fields of individual bulletproof clothes and helmets impact protection, armored vehicle chassis explosion-proof shock wave protection, aircraft shell impact resistance and the like, development of novel impact-resistant protection structures is urgently needed to achieve light weight, high energy absorption efficiency and low cost comprehensive performance optimization. Therefore, on the basis of inheriting the design idea of the corrugated board, by introducing a new core layer structure, the absorption capacity of the core layer on impact energy is improved and the initial peak load is reduced under the conditions of limited space and mass constraint, so that the requirements of multiple fields on the high-performance impact-resistant energy-absorbing structure are met. Disclosure of Invention Object of the invention The invention provides an 8-shaped paper folding buffering and energy absorbing structure, which abandons the traditional sine-shaped, triangle-shaped and trapezoid-shaped core layer structure and adopts the 8-shaped paper folding buffering and energy absorbing structure as a core layer so as to realize the remarkable reduction of peak load in the initial stage of crushing and the great improvement of energy absorbing capacity. (II) technical scheme In order to achieve the above purpose, the invention adopts the following technical scheme: An 8-shaped paper folding buffering and energy absorbing structure comprises a top plate (2), a bottom plate (3), a core layer (1) and a filling layer (4), and is shown in figure 3. The core layer (1) is formed into a double-ring structure by connecting a strip-shaped structure in an 8-shaped rotation mode, as shown in figure 1, a plurality of 8-shaped rotation connections can be adopted for a longer strip-shaped structure to form a serial multi-ring structure (similar to a sugar-gourd serial structure), and the double-ring structure or the serial multi-ring structure are arranged according to a two-dimensional topological array to form the core layer (1). The ratio of the wall thickness to the characteristic dimension of the ribbon structure is 1:0.01-1:0.2. In terms of materials, the core layer (1) is preferably made of 6-series aluminum alloy, 316L stainless steel or Nylon 12 CF material, but is not limited to plastic aluminum alloy, low carbon steel and other metal materials, and high polymer, thermoplastic materials, nylon, carbon fiber composite materials and other nonmetallic materials, and the top plate (2) and the bottom plate (3) are preferably made of ultrahigh molecular weight polyethylene plates, carbon fiber plates or aluminum plates and other materials. (III) beneficial effects Compared with the prior art, the invention has the following beneficial effects: By connecting two or more basic annular structures in series, an 8-shaped or multi-ring serial structure is formed, and a core layer is formed by two-dimensional arrangement, so that the performance is improved on the premise of not remarkably increasing the complexity and the quality of the structure; The peak loa