Accurate Modeling and Modulus Calculation Method for Microstructure of Fiber Reinforced Ceramic Matrix Composites

A composite material, fiber reinforced technology, applied in design optimization/simulation, special data processing applications, etc., can solve problems such as differences in test results and differences in weaving methods, and achieve the effect of accurate macroscopic effective modulus values.

Active Publication Date: 2022-04-05
SOUTHWEST JIAOTONG UNIV
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  • Abstract
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  • Claims
  • Application Information

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Problems solved by technology

In view of the randomness of its microstructural defects and the differences in weaving methods at different positions, there are some differences in the test results

Method used

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  • Accurate Modeling and Modulus Calculation Method for Microstructure of Fiber Reinforced Ceramic Matrix Composites
  • Accurate Modeling and Modulus Calculation Method for Microstructure of Fiber Reinforced Ceramic Matrix Composites
  • Accurate Modeling and Modulus Calculation Method for Microstructure of Fiber Reinforced Ceramic Matrix Composites

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Embodiment Construction

[0084] The technical solution of the present invention will be further described below in conjunction with the accompanying drawings.

[0085] Such as figure 1 As shown, a method for accurate modeling and modulus calculation of the microstructure of fiber-reinforced ceramic matrix composites includes the following steps:

[0086] S1. Establish the fiber-scale finite element model of continuous silicon carbide fiber-reinforced silicon carbide ceramic matrix composites; the specific implementation method is: use the level set method and unit automatic discrete technology to cut and distinguish the fiber-scale model into carbon fiber, Three components of pyrolytic carbon and SiC matrix. According to related studies, the cross-sectional structure of tooth enamel at the micron scale is as follows: figure 2 As shown, based on the level set method and element automatic discretization technology, the fiber scale model is cut and divided into three components: carbon fiber, pyrolyti...

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Abstract

The invention discloses a method for accurately modeling the microstructure of fiber-reinforced ceramic matrix composite materials and calculating the modulus, comprising the following steps: S1, establishing a finite element model of the fiber filament scale; S2, establishing a finite element model of the fiber filament scale microcracks and pore distribution Element model; S3, calculate the unit stiffness matrix of each unit; S4, calculate the average stress and average strain of all units in the fiber-scale finite element model; S5, establish the fiber bundle-scale woven body model; S6, establish the fiber bundle-scale woven body Finite element model of mesopore distribution; S7, calculating the element stiffness matrix in each element; S8, calculating the average stress and average strain of all elements in the fiber bundle scale braid model. The present invention fully considers the microstructural characteristics, microcracks and pores of the braided body at the fiber filament scale and fiber bundle scale, effectively sets the properties of the fiber bundle across the isotropic material at different weaving positions, and can calculate more accurate macroscopic effective modulus values .

Description

technical field [0001] The invention belongs to the field of calculation and research of macroscopic elastic modulus of continuous silicon carbide fiber-reinforced silicon carbide ceramic-based composite material, and in particular relates to a method for accurate modeling of microstructure of continuous fiber-reinforced ceramic-based composite material and automatic macroscopic modulus prediction method. Background technique [0002] Continuous silicon carbide fiber reinforced silicon carbide ceramic matrix composites have been widely used in the manufacture of aircraft, spacecraft, rockets, etc. Key components for engines and nuclear energy. At present, various research institutions at home and abroad have carried out many pioneering research work in related fields such as material preparation, performance improvement, and manufacturing technology. Generally speaking, there is still a certain gap between China and Western countries in the basic research, industrialization...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G06F30/23
CPCG06F30/23
Inventor 刘建涛蔡兴瑞万逸飞冯志强曾庆丰关康周仲荣
Owner SOUTHWEST JIAOTONG UNIV
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