Stress-strain analysis method for anisotropic material

An anisotropic, stress-strain technology, applied in the field of isolated grid coordinate mapping of anisotropic materials, can solve the problems of grid discreteness, grid quality limitation, difficult selection of surfaces and lines, etc., to improve accuracy and precision degree, to ensure consistency and accuracy, and to improve the effect of strength calculation accuracy

Pending Publication Date: 2022-07-15
BEIHANG UNIV +1
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Problems solved by technology

[0003] The existing stress-strain analysis methods for equianisotropic materials, including ceramic matrix composite materials, cannot take into account the grid quality and unit coordinate laying when establishing the grid model, so that the grid quality is limited, and the existing technology The discretization method is used to lay out the unit coordinates in the grid model, which makes it difficult to determine the direction of the material when performing complex grid unit layup design due to the discretization of the grid and the difficulty in selecting surfaces and lines.
The above factors lead to inaccurate and precise stress-strain analysis of ceramic matrix composite materials, and it is difficult to fully guarantee the performance and stability of anisotropic materials such as ceramic composite parts, and cannot meet the stress-strain analysis requirements of anisotropic materials in this field

Method used

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  • Stress-strain analysis method for anisotropic material
  • Stress-strain analysis method for anisotropic material
  • Stress-strain analysis method for anisotropic material

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Embodiment 1

[0056] In this exemplary embodiment, a stress-strain analysis of a component of a ceramic matrix composite material is performed using the stress-strain analysis method for anisotropic materials provided in accordance with embodiments of the present invention. Firstly, the geometric model of the component of ceramic matrix composite material is established, and the geometric model is imported into Hypermesh for mesh division, and the isolated mesh model is obtained.

[0057] like Figure 5 shown, import the isolated mesh model into Abaqus. Next, import the geometric model into Abaqus and place it in the same Model as the isolated mesh model.

[0058] Next, add material parameters and / or material directions for the isolated mesh model. The step more specifically includes, acquiring the coordinates of the center point of each grid unit in the isolated grid model; such as Image 6 , Figure 7 As shown, the line is selected as the main direction of the material, and the surfac...

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Abstract

The invention provides a stress-strain analysis method for an anisotropic material, which is characterized by comprising the following steps of: S1, establishing a geometric model of the anisotropic material, and performing grid division on the geometric model to obtain an isolated grid model; s2, processing each grid unit in the isolated grid model to obtain a direction vector of each grid unit; s3, creating a discrete domain by using the direction vector of each grid unit of the isolated grid model obtained in the step S2; and S4, carrying out material coordinate laying on each grid unit of the isolated grid model by utilizing a discrete domain.

Description

technical field [0001] The invention relates to the field of stress-strain analysis of anisotropic materials, in particular to an isolated grid coordinate mapping method of anisotropic materials. Background technique [0002] Ceramic materials are anisotropic materials with high temperature resistance, low density, corrosion resistance and high hardness, so they are widely used in aero-engines and other equipment, such as flame tubes, turbine guide vanes, turbine outer rings, tail nozzles, etc. . However, because aero-engines have strict requirements on their performance and stability, it is necessary to analyze the stress and strain of these anisotropic materials. [0003] The existing stress-strain analysis methods for isotropic materials including ceramic matrix composite materials cannot take into account the grid quality and the laying of element coordinates when establishing a grid model, so that the grid quality is limited, and in the prior art. The adopted discrete...

Claims

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Application Information

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IPC IPC(8): G06F30/23G06F113/26G06F119/14
CPCG06F30/23G16C60/00G06F2119/14G06F2113/26
Inventor 董少静李子仪宋伟申秀丽张硕
Owner BEIHANG UNIV
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