Force flow guided mesoscopic structure design method

A technology of mesoscopic structure and design method, applied in computer-aided design, design optimization/simulation, calculation, etc., can solve problems such as the mismatch of stress distribution of mesoscopic structure unit cells, achieve the improvement of specific strength and specific stiffness, and improve the ratio of The effect of stiffness

Active Publication Date: 2021-01-05
TONGJI UNIV
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  • Abstract
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Problems solved by technology

[0003] However, in the prior art, the mesoscopic structural unit cells are designed to be arranged uniformly and periodically, while the stress distribution

Method used

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  • Force flow guided mesoscopic structure design method
  • Force flow guided mesoscopic structure design method
  • Force flow guided mesoscopic structure design method

Examples

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Embodiment

[0058] Taking the mesoscopic structure design of a flat square circular hole plate as an example, as figure 2 As shown, the load condition of the plate is: the left side is fixedly constrained, and the lower right corner is subjected to a concentrated force load in the direction of -45°. The internal mesoscopic structure of the plate is designed to improve its structural strength. The following examples are respectively selected based on the principal stress trajectory and Mesostructure design with constant load transfer path.

[0059] 1) Mesoscopic structure design based on principal stress trajectory

[0060] (a) Establish a finite element analysis model according to the load and boundary conditions of the square circular hole plate, and obtain the finite element stress analysis results;

[0061] (b) Extract the X, Y, and Z components of the three principal stress directions of all nodes based on the finite element analysis results, and draw the principal stress directions...

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Abstract

The invention relates to a force flow guided mesoscopic structure design method, which comprises the following steps of: 1) establishing a finite element analysis model according to a load and a boundary condition of a part under an actual working condition, and obtaining a finite element stress analysis result; 2) obtaining stress information required by force flow visualization according to a finite element stress analysis result; 3) generating a force streamline according to the stress information and the number N of the interpolation points; and 4) generating a mesoscopic structure under the guidance of a force streamline. Compared with the prior art, the force flow information of the part under the actual working condition is considered, different force flow lines can be generated according to different force flow definitions, then mesoscopic structures of different arrangement modes are generated, different internal mesoscopic structure designs of the part under the same geometryare achieved, and the specific strength and the specific rigidity of the part structure are improved.

Description

technical field [0001] The invention relates to the field of mesoscopic structure design, in particular to a mesoscopic structure design method guided by force flow. Background technique [0002] Mesoscopic structure refers to a structure composed of unit cells with a characteristic size between 0.1-10mm arranged in a specific way. It not only has a high strength-to-mass ratio or stiffness-to-mass ratio, but also has energy absorption, heat dissipation, and sound insulation. Replacing solid structures with mesoscopic structures is a new way to realize the lightweight design of parts. The characteristics of mesoscopic structures depend on design variables such as topology, geometry, orientation, and size of the unit cells in the structure. By controlling these variables, the unit cell structure can be The space meets the performance requirements such as stiffness or strength of the part or the whole. [0003] However, in the prior art, the mesoscopic structural unit cells ar...

Claims

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Application Information

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IPC IPC(8): G06F30/17G06F30/23G06F113/10G06F119/08G06F119/14
CPCG06F30/17G06F30/23G06F2113/10G06F2119/08G06F2119/14
Inventor 李帅帅王玉王硕于颖
Owner TONGJI UNIV
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