离子推进C/C栅极的设计与力学分析

doi:10.12066/j.issn.1007-2861.1922

Abstract

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

CLC Number:

V439.4文献标志码：A文章编号：1007-2861(2019)02-0235-10

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（Natural Science Edition）, 2019, 25(2): 235-244.

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References 12

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

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