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Multi-scale structural material integrated design method based on shape features

A technology of structural materials and design methods, applied in computing, special data processing applications, instruments, etc., can solve problems such as poor practicability, and achieve the effect of good practicability and increased calculation accuracy

Active Publication Date: 2018-01-09
NORTHWESTERN POLYTECHNICAL UNIV
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Problems solved by technology

[0004] In order to overcome the shortcomings of poor practicability of the existing structural material integrated design method, the present invention provides a multi-scale structural material integrated design method based on shape features

Method used

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  • Multi-scale structural material integrated design method based on shape features
  • Multi-scale structural material integrated design method based on shape features
  • Multi-scale structural material integrated design method based on shape features

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Embodiment Construction

[0037] refer to Figure 1-5 . The multi-scale structural and material integrated design method based on shape features of the present invention is used for structural and material integrated design, considering that the size of the structural design area is 80×40mm, the left side of the area is fixed, and the lower right corner receives a downward concentrated force F=100N. The Young's modulus and Poisson's ratio of the structural material are E=10Pa, ν=0.3, respectively. Specific steps are as follows:

[0038] Step 1. Refer to figure 2 on the right. The number of microstructural configuration units is determined to be 16, the size of each microstructural unit cell is 50×50, and the number of microstructural features contained in each unit cell is 8, and its basic parameters are

[0039] Table 1

[0040]

[0041] Then calculate the level set function φ of the overall microstructure according to formula (1).

[0042]

[0043] φ=max(φ i )

[0044] Step 2. Calculate ...

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Abstract

The invention discloses a multi-scale structural material integrated design method based on shape features. The method is used for solving the technical problem that existing structural material integrated design methods are poor in practicability. According to the technical scheme, the shape features are used as basic elements of macro and micro design, a regular quadrangular finite element gridis adopted, and a structural shape is described by calculating a level set function of a feature structure; material properties of a microstructure are associated with macrostructure units through a homogenization method, and a multi-scale mechanical model based on a fixed grid is established; and shape position parameters of the shape features are selected to serve as design variables, and macroand micro topological optimization design is realized. Through the method, macrostructure design and microstructure design are associated, the level set method is adopted to describe the model, multiple microstructure forms can be obtained according to local conditions, an optimization result which has a smooth boundary and apparently contains feature information can be obtained, the method can beseamlessly integrated with existing computer-aided design software, and practicability is high.

Description

technical field [0001] The invention relates to a structural material integrated design method, in particular to a multi-scale structural material integrated design method based on shape features. Background technique [0002] With the continuous maturity of 3D printing technology, the emergence of anisotropic materials and microstructures makes it possible to optimize the properties of materials in structures. In order to pursue the high performance of components, traditional shape topology optimization pays more and more attention to the optimization of material microstructure while optimizing the overall shape of the structure. 3D printing technology makes it possible to use self-designed microstructures. Therefore, using the characteristics of the microstructure to work in a specific direction can maximize the structural performance. Compared with the optimization design method of traditional homogeneous materials, this integrated design method of structural materials f...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G06F17/50
Inventor 张卫红徐钊朱继宏周莹
Owner NORTHWESTERN POLYTECHNICAL UNIV
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