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A foam-filled three-period minimally curved porous structure sandwich panel and its preparation method

A technology of extremely small curved surface and porous structure, applied in chemical instruments and methods, synthetic resin layered products, layered products, etc., to achieve the effects of improving mechanical properties, overcoming stress concentration, and overcoming uneven force transmission

Active Publication Date: 2020-09-29
BEIHANG UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the above-mentioned CN107885945A only applies three-period minimal curved surfaces to simulation models such as teeth, and the purpose is only to achieve light weight

Method used

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  • A foam-filled three-period minimally curved porous structure sandwich panel and its preparation method
  • A foam-filled three-period minimally curved porous structure sandwich panel and its preparation method
  • A foam-filled three-period minimally curved porous structure sandwich panel and its preparation method

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preparation example Construction

[0063] Another aspect of the present invention provides a method for preparing a foam-filled sandwich panel with a three-dimensional periodic minimally curved surface porous structure. First, the 3D printing technology is integrated to prepare an upper inner layer sheet 2, a lower inner layer sheet 4, and four sides. A transparent three-period minimally curved porous structure 5; then place the 3D printed structure in a container containing a foaming agent, and foam it through rapid foaming technology, so that the foam material 6 is fully filled into the minimally curved porous structure In step 5, after the foam is fully shaped, the excess foam on the four sides of the porous structure is removed to form a foam-filled three-dimensional periodic minimal curved surface porous structure core; for the P-shaped surface, the excess foam outside the cells of the porous structure can be further removed, and finally through By laser welding or gluing, the upper outer solid plate 1 and ...

Embodiment 1

[0071] Based on the mathematical expression of the G-type minimal curved surface in the present invention, use MATLAB software to generate a cube G-shaped minimal curved surface porous structure point cloud model with a cell side length of 10mm, and then build a total length of 180mm by means of the three-dimensional modeling software Solidworks. The three-dimensional geometric model of the G-shaped minimally curved porous structure 5 with a total width of 40 mm, a total height of 20 mm, and a curved surface wall thickness of 1.5 mm, and then establish an upper inner layer sheet 2 and a lower inner layer sheet 4 with a length of 180 mm, a width of 40 mm, and a height of 2 mm And consolidate with the established G-type minimally curved porous structure 5 three-dimensional geometric model to form a minimally curved porous structure three-dimensional model including upper and lower inner layer thin plates;

[0072] Convert the established geometric model including the extremely sm...

Embodiment 2

[0077] Based on the mathematical expression of the P-type minimal curved surface in the present invention, use MATLAB software to generate a cube P-type minimal curved surface porous structure point cloud model with a cell side length of 10mm, and then construct a total length of 180mm, The three-dimensional geometric model of the P-type minimally curved porous structure 5 with a total width of 40 mm, a total height of 20 mm, and a curved surface wall thickness of 1.5 mm, and then establish an upper inner layer sheet 2 and a lower inner layer sheet 4 with a length of 180 mm, a width of 40 mm, and a height of 2 mm And consolidated with the established P-type minimally curved porous structure 5 three-dimensional geometric model to form a minimally curved porous structure three-dimensional model including upper and lower inner thin plates;

[0078] Convert the established geometric model including the extremely small curved surface porous structure 5, the upper inner layer sheet 2...

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Abstract

The invention relates to a foam-filled three-period minimum-curved-surface porous structure sandwich panel and a preparation method, a core comprising three-period minimal curved surface porous structure cells is arranged between an upper panel and a lower panel, and the minimal curved surface porous structure of the core is also filled with a foam material with a certain density. When the sandwich panel is subjected to external impact compression load action; due to the contact coupling effect between a foam filling material and the extremely small curved surface porous structure, the deformation mode of the overall structure of the sandwich panel is changed, so that the mechanical property of the foam-filled three-period minimal curved surface porous composite structure is remarkably improved compared with a hollow minimal curved surface porous structure, and the energy absorption enhancement effect of interaction during two plastic deformation of minimal curved surface porous structure wall surface bending and foam material compression can be exerted. An outer-layer panel is connected with an inner-layer panel, and the inner-layer panel and the core are integrally printed and fused, so that firm connection between the core and the panels is facilitated, and optimal configuration of materials and thicknesses of the inner-layer panel and the outer-layer panel is facilitated.

Description

technical field [0001] The invention relates to the technical field of anti-shock protection, in particular to a sandwich panel with a foam-filled three-period minimally curved porous structure and a preparation method thereof. Background technique [0002] With the rapid development of aerospace technology, large aircraft, spacecraft and other aircraft are running faster and faster. Accompanied by it, the risk of accidents such as high-speed impact and collision of these aircraft is also increasing. How to ensure that its main structure does not undergo catastrophic damage when it is subjected to strong impact loads has become an extremely important issue in the field of aerospace safety protection. topic. In this regard, engineers have developed a variety of lightweight energy-absorbing protective structures including porous metal / non-metal foam, honeycomb structure, and three-dimensional lattice structure, and have achieved a wide range of applications, and achieved good...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B32B3/24B32B3/08B32B27/34B32B15/20B32B15/088B32B7/12B32B9/00B32B9/04B32B15/18B32B15/14B32B37/12B32B33/00
CPCB32B3/08B32B3/266B32B5/02B32B7/12B32B15/088B32B15/14B32B15/18B32B15/20B32B27/34B32B33/00B32B37/12B32B2262/106B32B2266/0278B32B2266/04B32B2307/54B32B2307/558B32B2307/56B32B2307/718
Inventor 胡大勇李贤肖译林党霖薇王吉李政林
Owner BEIHANG UNIV
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