基于单胞结构的2.5D碳纤维织物增强复合材料等效热导率

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Abstract The microstructure model of carbon fiber bundles and the unit cell structure model of the composites reinforced by carbon fiber with 2.5D fabric were established by finite element method. The equivalent thermal conductivity of carbon fiber bundles and composites in steady thermal conditions were calculated. The effects of carbon fiber diameter and the space between two carbon fibers on the thermal conductivity in axial and radial direction of carbon fiber bundles and in thickness direction of the composites were investigated. The results show that, the thermal conductivity of the carbon matrix is between the radial thermal conductivity and the axial thermal conductivity of carbon fiber. With increasing the carbon fiber diameter, the axial thermal conductivity of the carbon fiber bundles increases, the radial thermal conductivity and the thermal conductivity of the composites in thickness direction decrease. With increasing the space between two carbon fibers, the axial thermal conductivity of the carbon fiber bundles decreases, the radial thermal conductivity and the thermal conductivity of the composites in thickness direction increase.

Key words： equivalentthermal conductivity finite element method 2.5D fabric carbon matrix composites carbon fiber

Received: 13 October 2017 Published: 11 July 2019

ZTFLH:	TH117
	TB322

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	LI Hui
	DU Jianhua
	WANG Haoxu

Cite this article:

LI Hui,DU Jianhua,WANG Haoxu. Equivalent thermal conductivity of composites reinforced by carbon fiber with 2.5D fabric based on unit cell[J]. Materials Science and Engineering of Powder Metallurgy, 2018, 23(1): 94-100.

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http://pmbjb.csu.edu.cn/EN/ OR http://pmbjb.csu.edu.cn/EN/Y2018/V23/I1/94

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