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An Uncertainty Analysis Method for Predicting the Properties of Periodic Materials

A periodic material, uncertainty technology, applied in the field of efficiency analysis, to achieve the effect of great safety and convenience advantages

Active Publication Date: 2018-12-21
BEIHANG UNIV
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Problems solved by technology

[0005] The technical problem to be solved in the present invention is to establish an uncertainty analysis method for predicting the performance of periodic materials. The elastic modulus of periodic materials is calculated by finite element calculation of typical microstructure cells, and an appropriate period is applied in the analysis. Periodic conditions and boundary conditions to simulate the internal displacement and deformation relationship of periodic materials

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  • An Uncertainty Analysis Method for Predicting the Properties of Periodic Materials
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  • An Uncertainty Analysis Method for Predicting the Properties of Periodic Materials

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Embodiment Construction

[0033] The present invention will be further described below in conjunction with the accompanying drawings and specific embodiments.

[0034] Such as Figure 5 As shown, the present invention predicts the uncertainty propagation analysis method of periodic material performance, comprises the following steps:

[0035] (1) For the actual target material, according to the microstructure arrangement law in its internal mesoscale, select a suitable cube block as an effective cell, as follows: figure 1 The configuration shown is taken as an example. The selected typical cells can be reorganized in the three-axis direction to reproduce the periodic configuration distribution inside the material. At the same time, the cell should meet the symmetry requirements of the three directions in order to apply subsequent conditions.

[0036] (2) For the typical cells obtained in the previous step, establish a digital geometric model in the ANSY software pre-processor, take the cube vertices a...

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Abstract

The invention relates to an uncertainty analysis method for predicting the performance of a periodic material. The method first utilizes a theory to derive and design a mesoscopic microstructure cell loading boundary condition, and proves that the equivalent performance obtained by finite element simulation calculation can represent the equivalent performance of the whole material under the condition. During the process of obtaining an equivalent elasticity modulus of the material by analyzing a typical micro unit cell scale configuration of the material, the invention takes full consideration of the uncertainty of cell dimension and base material performance and analyzes propagation of the uncertainty in the macroscopic and mesoscopic equivalent processes to obtain the actual fluctuation range of the performance of the material and to ensure security of the results.

Description

technical field [0001] The invention relates to the field of uncertain equivalent analysis methods for periodic materials, in particular to an uncertainty analysis method for predicting the performance of periodic materials; Background technique [0002] Materials commonly used in engineering practice with microstructures are generally ordered or disordered lightweight porous metal or non-metallic materials, such as truss-like materials, honeycomb materials and foam materials. Due to their light weight, high specific strength, high specific stiffness and multi-functionality, this kind of material has gradually been popularized and applied in practical engineering. The characteristics of ordered lightweight porous materials can be expressed as the periodic arrangement of typical microstructure cells in different directions. Through the analysis of microstructure cells, the macroscopic mechanical properties of the entire material, such as elastic modulus, can be obtained. [...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G06F17/50
CPCG06F30/23
Inventor 王磊蔡逸如王晓军刘易斯刘东亮夏海军耿新宇
Owner BEIHANG UNIV
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