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Journal of Shanghai University >

2019 , Vol. 25 >Issue 2: 235 - 244

DOI: https://doi.org/10.12066/j.issn.1007-2861.1922

Research Articles

Structural design and mechanical analysis of C/C grids for ion thruster

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  • 1. Shanghai Institute of Applied Mathematics and Mechanics,Shanghai University, Shanghai 200072, China
    2. College of Sciences, Shanghai University, Shanghai 200444, China
    3. Research Center of Composite Materials, Shanghai University, Shanghai 200072, China

Received date: 2017-05-08

  Online published: 2019-05-05

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Abstract

To design C/C grids for the ion thruster and estimate lateral stiffness of the C/C grids, the mechanical behavior of C/C composite grids is studied based on the geometry of molybdenum grids. Finite element models of acceleration and screen grids are established using ABAQUS. By introducing a periodic boundary condition, a homogeneous model is established to analyze the stress distribution and mechanical properties of the representative volume element. The effect of mechanical properties of the composite components on global lateral stiffness of the grids is then discussed, and compared with molybdenum grids. The results show that global lateral stiffness of C/C grids is a function of tensile modulus of the carbon fiber and the modulus of matrix. Higher tensile modulus of carbon fiber can be selected to improve lateral stiffness of C/C grids.

Key words： ion thruster; grids assembly; C/C composite; finite element analysis

Cite this article

CHEN Yue, LI Kai, PENG Yuqing, LI Aijun, ZHANG Dongsheng . Structural design and mechanical analysis of C/C grids for ion thruster[J]. Journal of Shanghai University, 2019 , 25(2) : 235 -244 . DOI: 10.12066/j.issn.1007-2861.1922

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