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Design method and structure of dot matrix sandwich structure for additive manufacturing

A sandwich structure and additive manufacturing technology, applied in the field of additive manufacturing, can solve problems such as the design method of the sandwich structure and the skin, and achieve the effect of an effective design method

Pending Publication Date: 2022-07-12
BEIJING AERONAUTIC SCI & TECH RES INST OF COMAC +1
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, this invention only provides a structural design method suitable for gradient lattice, and does not propose a skin design method for the sandwich structure. This patent is oriented to the lattice sandwich structure, and provides a design method from skin design to lattice filling

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  • Design method and structure of dot matrix sandwich structure for additive manufacturing
  • Design method and structure of dot matrix sandwich structure for additive manufacturing
  • Design method and structure of dot matrix sandwich structure for additive manufacturing

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Embodiment Construction

[0040] In order to better understand the technical solutions of the present invention, the embodiments of the present invention are described in detail below with reference to the accompanying drawings.

[0041] It should be understood that the described embodiments are only some, but not all, embodiments of the present invention. Based on the embodiments of the present invention, all other embodiments obtained by those of ordinary skill in the art without creative efforts shall fall within the protection scope of the present invention.

[0042] In the design method of the additively manufactured lattice sandwich structure of the present invention, the initial structure is assumed to be a solid structure, traditional topology optimization is performed, and then the skin thickness of the initial structure is adjusted according to the topology optimization result, and finally the cavity of the structure is adjusted. Partially fill the lattice to complete the design, which can pr...

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Abstract

The invention provides a design method and structure for an additive manufacturing lattice sandwich structure, relates to the technical field of additive manufacturing, and can provide a feasible design scheme for preparing the lattice sandwich structure by adopting an additive manufacturing process and expand the application scene of the additive manufacturing lattice structure. According to the method, an initial structure is assumed to be a solid structure for topological optimization, then the skin thickness of the initial structure is adjusted according to a topological optimization result, then a cavity part of the adjusted structure is filled with a dot matrix through dot matrix filling optimization, and design is completed. The optimization target of topological optimization is that the strain energy of the overall structure with the weight is minimum, and the constraint conditions comprise volume fraction constraint, minimum size constraint and / or maximum size constraint; the optimization target of dot matrix filling optimization is that the rigidity of the overall structure with the weight is maximum, and the constraint conditions comprise the total mass constraint, the dot matrix target length constraint, the minimum diameter constraint and / or the maximum diameter constraint.

Description

technical field [0001] The invention relates to the technical field of additive manufacturing, in particular to a method and structure for designing a lattice sandwich structure for additive manufacturing. Background technique [0002] The lattice structure is a kind of three-dimensional ordered porous structure, which is composed of periodic lattice unit cells. The functional regulation of the unit cell can be achieved through the design of the configuration and geometric size of the unit cell. The lattice structure is similar to the truss structure, which is composed of a large number of rod structures connected to each other in space, the difference is that the size of the lattice structure is much smaller. The study found that the lattice structure has higher specific strength and specific stiffness than the currently commonly used lightweight materials. At the same time, due to the large number of holes connected to it, it has good heat dissipation, heat insulation, v...

Claims

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Application Information

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IPC IPC(8): G06F30/18G06F30/30G06F111/04G06F113/10G06F119/14
CPCG06F30/18G06F30/30G06F2113/10G06F2119/14G06F2111/04Y02P10/25
Inventor 石越张烨李崧齐山贺刘倩胡震东张嘉振
Owner BEIJING AERONAUTIC SCI & TECH RES INST OF COMAC
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