CN-121993525-A - Two-way fusion thin-wall pipe protection architecture that shocks resistance

CN121993525ACN 121993525 ACN121993525 ACN 121993525ACN-121993525-A

Abstract

The invention aims to provide a bidirectional fusion thin-wall tube shock-resistant protection structure applied to a sandwich structure core layer and application thereof, so as to solve the problems of high initial peak load, limited energy absorption capacity, insufficient overall deformation stability and the like commonly existing in the existing sandwich structure under the action of impact load. In order to achieve the purpose, the impact-resistant protection structure adopts a bidirectional fusion thin-wall pipe structure, and is characterized in that two groups of thin-wall pipe units are arranged according to mutually orthogonal spatial orientations, wherein one group of thin-wall pipes rotates 90 degrees around an axis relative to the other group of thin-wall pipes, and then an integrated bidirectional fusion thin-wall pipe structure is formed through Boolean fusion operation. The sandwich structure core layer with the two-dimensional array characteristic can be constructed by carrying out staggered arrangement and mutual fusion on a plurality of thin-wall pipe units.

Inventors

WANG CHENG
XU BIN
YANG TONGHUI
XIAO CHENGLONG
ZHANG RUMING

Assignees

北京理工大学

Dates

Publication Date: 20260508
Application Date: 20260316

Claims (7)

1. A two-way fusion thin wall pipe protection architecture that shocks resistance, its characterized in that: The protection structure comprises a plurality of cells, each cell is composed of thin-wall tubes which are mutually orthogonally arranged, and the axes of the two thin-wall tubes are perpendicular.
2. The bi-directional fused thin-walled tube impact protection structure of claim 1, wherein: the thin-wall tube is a rectangular tube, and the edge of one rectangular tube intersects with the axis of the other rectangular tube.
3. The bi-directional fused thin-walled tube impact protection structure of claim 1, wherein: the thin-wall pipe is a circular pipe, and the wall surface of one circular pipe is intersected with the axis single point of the other circular pipe.
4. The bi-directional fused thin-walled tube impact protection structure of claim 1, wherein: the thin-walled tube is a hexagonal tube, wherein the edges of one hexagonal tube perpendicularly intersect the axis of the other hexagonal tube.
5. The use of the bi-directional fused thin-walled tube impact protection structure of claim 1, wherein: The thin-wall tubes which are arranged in an orthogonal mode form an array in a staggered mode, and are overlapped through Boolean operation to form a sandwich structure core layer of a two-dimensional array.
6. The application of the bidirectional fusion thin-wall pipe impact-resistant protection structure according to claim 5, which is characterized in that: The sandwich layer is arranged between the top plate and the bottom plate and is fixedly connected with the top plate and the bottom plate, so that an integral sandwich structure is formed.
7. The application of the bidirectional fusion thin-wall pipe impact-resistant protection structure according to claim 5, which is characterized in that: and defining one of the thin-wall pipes which are mutually orthogonally arranged in each cell as a transverse pipe, and the other as a vertical pipe, wherein when the array is formed, two adjacent transverse pipes are intersected with the axis of the same vertical pipe, namely, the left side of the vertical pipe is embedded into one transverse pipe, and the right side of the vertical pipe is embedded into the other transverse pipe.

Description

Two-way fusion thin-wall pipe protection architecture that shocks resistance Technical Field The invention belongs to the technical field of impact resistance protection, and particularly relates to a modularized sandwich structure core layer unit for dynamic load protection, namely a bidirectional fusion thin-wall pipe impact resistance protection structure. Background The constant-section thin-wall tube structure (such as round, square and polygonal tubes) is widely applied to energy absorption protection and impact resistance engineering due to mature manufacturing process, compact structural form and higher specific strength, and is widely used as a bearing core layer of a sandwich structure. However, under axial compressive loading, such conventional thin-walled tubes still have several mechanical limitations to be overcome. On one hand, the constant-section thin-wall pipe tends to have obvious load surge in the initial stage of crushing, and the force-displacement response curve of the constant-section thin-wall pipe shows higher initial peak force. Under impact or transient load conditions, this characteristic is prone to excessive impact transfer effects, thereby adversely affecting the body structure or the object being protected. On the other hand, after the thin-wall pipe enters the buckling stage, the buckling deformation mode is relatively simple, the participation degree of plastic deformation is limited, the stable energy absorption interval is short, and the whole energy dissipation capacity is difficult to fully develop. Aiming at the problems, the method has been studied to control the axial crushing response of the thin-wall tube by means of wall thickness gradient design, prefabricated crease introduction, multi-cell structure parallel connection and the like. Although these methods can improve local mechanical properties to some extent, it is generally difficult to achieve simultaneous improvement of effective suppression of initial peak loads and continuous energy absorption capacity. In addition, such improvements often accompany increased structural complexity or increased processing requirements, and are therefore limited in practical engineering applications. Therefore, on the premise of considering the light weight characteristic and the manufacturing feasibility of the thin-wall structure, how to achieve flattening of the initial peak load of the crushing and further enhance the energy absorption efficiency of the structure in the crushing process becomes a key technical problem to be solved in the optimization design of the sandwich structure core layer. Based on the two-way fusion design method of the thin-wall pipe, the novel fusion configuration is introduced on the basis of the traditional rectangular thin-wall pipe, so that the force transmission path in the crushing process is effectively regulated, peak load is weakened, the structure is promoted to form a more complex and sufficient plastic hinge evolution mode in the crushing process, the energy absorption performance is remarkably improved, and a brand new core layer solution which takes mechanical performance and engineering feasibility into consideration is provided for the high-performance sandwich structure. Disclosure of Invention The invention aims to provide a bidirectional fusion thin-wall tube shock-resistant protection structure applied to a sandwich structure core layer and application thereof, so as to solve the problems of high initial peak load, limited energy absorption capacity, insufficient overall deformation stability and the like commonly existing in the existing sandwich structure under the action of impact load. In order to achieve the purpose, the impact-resistant protection structure adopts a bidirectional fusion thin-wall pipe structure, and is characterized in that two groups of thin-wall pipe units are arranged according to mutually orthogonal spatial orientations, wherein one group of thin-wall pipes rotates 90 degrees around an axis relative to the other group of thin-wall pipes, and then an integrated bidirectional fusion thin-wall pipe structure is formed through Boolean fusion operation. The sandwich structure core layer with the two-dimensional array characteristic can be constructed by carrying out staggered arrangement and mutual fusion on a plurality of thin-wall pipe units. Further, the bidirectional fusion thin-wall tube core layer is arranged between the upper panel and the lower panel and is fixedly connected with the top plate and the bottom plate respectively, so that an integral sandwich structure is formed. The structure can effectively regulate and control the crushing deformation process under the action of impact load, reduce initial peak load, strengthen the participation degree of plastic deformation, improve the energy absorption efficiency and the structural stability, and is suitable for the field of impact resistance protection. The technical scheme of the structure