Method for reconstructing micro structure finite element of multiphase material based on sequence image

A technology of sequential images and multi-phase materials, applied in the field of materials, can solve problems such as complicated reconstruction process

Inactive Publication Date: 2011-11-09
XI AN JIAOTONG UNIV
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Problems solved by technology

[0006] The purpose of the present invention is to overcome the deficiencies of existing reconstruction methods in the application of material performance and failure analysis, etc., and to provide a finite element reconstruction method for multi-phase material mesostructure based on sequence images. The information in is mapped to the reconstructed finite element model, so t

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  • Method for reconstructing micro structure finite element of multiphase material based on sequence image
  • Method for reconstructing micro structure finite element of multiphase material based on sequence image
  • Method for reconstructing micro structure finite element of multiphase material based on sequence image

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Embodiment

[0138] The present invention utilizes a CT machine to collect a sequence image of a certain two-phase material, such as Figure 10a As shown, its size and pixels and other parameters see Figure 10b . The finite element reconstruction method proposed by the present invention is utilized below to realize the reconstruction of the sequence image, and in the implementation process, the effects of the four aspects that the present invention can realize are specified:

[0139] (1) Select a representative single image in the sequence image to reconstruct the two-dimensional finite element model that reflects the real mesoscopic structure of the material section

[0140] select Figure 10a The first image in the sequence of images, at n W =6,n H = 6 and f = 0.45 to reconstruct the two-dimensional finite element model reflecting the real mesoscopic structure of the material section, the obtained model is as follows Figure 11 shown.

[0141] It is easy to know that when 1≤n W ≤...

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Abstract

The invention provides a method for reconstructing a micro structure finite element of a multiphase material based on a sequence image, comprising the following steps of: on the basis of collecting, reading and interpolating the sequence image of the material, establishing a finite element topology model forming a mapping relation with the sequence image; using configuration information of the image and a topology structure of the model to determine a node and unit information; and then using a statistical average value of colour information in the image to determine material attributes of each unit of the finite element model. The method disclosed by the invention not only can be used for reconstructing a two-dimensional quadrangular finite element model reflecting a real structure of a material section through a single image, but can also be used for directly reconstructing a three-dimensional hexahedral finite element model reflecting the real structure of the material through the sequence image. By means of the invention, error accumulation in the links of reconstructing, grid dividing and the like in the current geometrical reconfiguration method can be avoided; the reconfiguration time is greatly saved; and the reconfiguration efficiency is improved. The method disclosed by the invention can be widely used in the fields, such as macro-micro cross scale research, optimization design and preparation of the multiphase material.

Description

technical field [0001] The invention belongs to the technical field of materials, and relates to a multiphase material finite element reconstruction method, in particular to a sequence image-based multiphase material mesostructure finite element reconstruction method. Background technique [0002] The performance and failure mechanism of multiphase materials (such as composite materials) are not only related to their macroscopic characteristics and the performance of each component phase, but also to the microscopic characteristics such as the shape, size, distribution of the reinforcing phase, and the interface properties between the reinforcing phase and the matrix. closely related. In the case of certain component materials, the mesoscopic structure of multiphase materials plays a decisive role in its performance and its failure during use, which makes it possible to develop and develop by designing and changing the mesoscopic structure of multiphase materials. It is pos...

Claims

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Application Information

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IPC IPC(8): G06F17/50G06T11/00G06T17/00
Inventor 李跃明黄明
Owner XI AN JIAOTONG UNIV
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