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Improved kagome micro-truss lattice sandwich structure and calculation method thereof

A sandwich structure and micro-truss technology, applied in calculation, computer-aided design, connecting components, etc., can solve problems such as stress concentration at nodes, achieve the effects of improving bearing capacity, reducing structural quality, and enhancing specific stiffness and specific strength

Active Publication Date: 2019-07-23
NANJING UNIV OF SCI & TECH
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Problems solved by technology

[0005] Aiming at the deficiencies in the prior art, the present invention provides an improved kagome micro-truss lattice sandwich structure and its calculation method, optimizes the shape of the truss unit according to the stress distribution, and solves the problem of stress concentration at the nodes. Increased load-carrying capacity of the structure

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  • Improved kagome micro-truss lattice sandwich structure and calculation method thereof
  • Improved kagome micro-truss lattice sandwich structure and calculation method thereof
  • Improved kagome micro-truss lattice sandwich structure and calculation method thereof

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[0029] The present invention is described in further detail now in conjunction with accompanying drawing.

[0030] A single bar can be similarly simplified to a cantilever beam structure when it is stressed, and the stress on the bar is the largest at the central node, and gradually decreases toward the edge. The traditional equal-section rods are prone to damage due to excessive stress at the joints, while the stress at the edges is small, resulting in waste of quality. If the rod diameter of each part can be matched with the stress value of the part, the load-bearing efficiency can be maximized.

[0031] Specifically, combine figure 1 , figure 2 An improved kagome micro-truss lattice sandwich structure is shown, including several spatial micro-truss lattice units 1 and two metal panels 2, the two metal panels 2 are arranged in parallel up and down, and several spatial micro-truss lattice units 1 are periodic Arranged between two metal panels 2, the top surface and the bo...

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Abstract

The invention discloses an improved kagome micro-truss lattice sandwich structure and a calculation method thereof. The improved kagome micro-truss lattice sandwich structure comprises a plurality ofspatial micro-truss lattice units and two metal panels, wherein the two metal panels are arranged in parallel up and down, the spatial micro-truss lattice units are periodically arranged between the two metal panels, and the top surface and the bottom surface are correspondingly connected with the two metal panels; each spatial micro-truss lattice unit comprises two subunits, the two subunits aresymmetrically distributed in a center symmetry mode, each subunit comprises three variable-cross-section rods, one end with the large diameter of the six variable-cross-section rods serves as a starting end to be fixedly connected to the same node, and the other end with the small diameter is a tail end. Aiming at the design that a common micro-truss lattice sandwich structure type kagome unit isimproved, the rod diameter is matched with stress, and the numerical value is determined by the stress condition; and the improved structure and the original structure have higher specific rigidity and specific strength under the condition that the quality is the same, and the bearing capacity per unit quality is stronger.

Description

technical field [0001] The invention belongs to the field of metal micro-truss lattice sandwich structures, and in particular relates to an improved kagome micro-truss lattice sandwich structure and a calculation method thereof. Background technique [0002] With the development of manufacturing technology, the demand for products such as lightweight, high strength, and personalized customization is getting higher and higher. As a new lightweight multifunctional structure developed in recent years, the metallic periodic microtruss lattice structure has good mechanical properties and can be used to manufacture aircraft parts such as hypersonic aircraft skins and engine components. It represents the development of structural materials. direction. The micro-truss lattice sandwich structure is generally composed of a rigid shell connected to a lightweight core. It is often used in lightweight structural design due to its high overall rigidity, high panel strength, low core dens...

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): F16S1/10F16B5/00G06F17/50
CPCF16S1/10F16B5/00G06F30/17G06F2119/06
Inventor 刘婷婷廖文和张长东郑胤峥施昕
Owner NANJING UNIV OF SCI & TECH
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