A Mesoscopic Structure Design Method Guided by Force Flow

A mesoscopic structure and design method technology, applied in design optimization/simulation, computer-aided design, calculation, etc., can solve problems such as the mismatch of stress distribution in mesoscopic structural unit cells, improve sound absorption performance, increase specific strength, The effect of improving heat dissipation efficiency

Active Publication Date: 2022-06-28
TONGJI UNIV
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  • Description
  • Claims
  • Application Information

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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 under the actual load condition of the part is non-uniform, so the uniformly periodic mesoscopic structural unit cells do not match the stress distribution

Method used

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  • A Mesoscopic Structure Design Method Guided by Force Flow
  • A Mesoscopic Structure Design Method Guided by Force Flow
  • A Mesoscopic Structure Design Method Guided by Force Flow

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 mesoscopic structure design method guided by force flow, which comprises the following steps: 1) establishing a finite element analysis model according to the load and boundary conditions under the actual working condition of the part, and obtaining the finite element stress analysis result; The stress information required for force flow visualization is obtained from the meta-stress analysis results; 3) The force flow lines are generated according to the stress information and the number of interpolation points N; 4) The mesoscopic structure is generated guided by the force flow lines. Compared with the prior art, the present invention considers the force flow information under the actual working conditions of the parts, and can generate different force flow lines according to different force flow definitions, and then generate mesoscopic structures with different arrangements, realizing the same geometry of the parts Under the different internal mesoscopic structure design, the specific strength and specific stiffness 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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Patent Type & Authority Patents(China)
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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