三维编织复合材料热物理性能的有限元分析

doi:CNKI:11-1929/V.20110316.1331.001

Abstract

Abstract: Based on the meso-structure of three-dimensional (3D) braided composites, the finite element models of thermo-physical properties of four-directional and five-directional composites are established. By using the periodic non-adiabatic temperature boundary condition and displacement boundary condition, the global effective thermal conductivity coefficient and thermal expansion coefficient are calculated, which are in a better agreement with experimental results than the previous literature. Based on this, the law of thermo-physical properties influenced by material parameters (i.e. braiding angle, fiber volume fraction and braiding structure) are also studied. The thermo-physical properties of 3D braided composites are significantly anisotropic, and the tendency of the thermal expansion properties with material parameters is more non-linear than the thermal conductivity properties.

Key words: 3D braided composites, thermal conductivity, thermal expansion, finite element method, unit cell

CLC Number:

V258
TB332

XIA Biao, LU Zixing. Finite Element Analysis on Thermo-physical Properties of 3D Braided Composites[J]. ACTA AERONAUTICAET ASTRONAUTICA SINICA, 2011, 32(6): 1040-1049.

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Finite Element Analysis on Thermo-physical Properties of 3D Braided Composites

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