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Numerical analysis of out-of-plane thermal conductivity of C/C composites by flexible oriented 3D weaving process considering voids and fiber volume fractions

Published online by Cambridge University Press:  22 July 2020

Zheng Sun Open the ORCID record for Zheng Sun [Opens in a new window] ,
Zhongde Shan ,
Tianmin Shao  and
Qun Zhang
Zheng Sun
Affiliation:
State Key Laboratory of Advanced Forming Technology and Equipment, China Academy of Machinery Science and Technology, Beijing100044, China Department of Mechanical Engineering, Tsinghua University, Beijing100084, China
Zhongde Shan*
Affiliation:
State Key Laboratory of Advanced Forming Technology and Equipment, China Academy of Machinery Science and Technology, Beijing100044, China
Tianmin Shao
Affiliation:
Department of Mechanical Engineering, Tsinghua University, Beijing100084, China
Qun Zhang
Affiliation:
State Key Laboratory of Advanced Forming Technology and Equipment, China Academy of Machinery Science and Technology, Beijing100044, China
*
a)Address all correspondence to this author. e-mail: shanzd@cam.com.cn
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Abstract

Thermal conductivity behaviors are one of the most important evaluations of carbon fiber-reinforced carbon matrix (C/C) composites in the field of thermal protective structures. In order to deepen the understanding of the thermal conductivity behaviors of C/C composites, the out-of-plane thermal conductivity of C/C composites is studied by considering voids and the fiber volume fractions. The representative volume element (RVE) models of microscale and mesoscale are proposed. The parameters of the RVE models are captured by X-ray micro-computed tomography. The carbon matrix equivalent models and fiber volume fraction models along the z-direction were established. The effects of the porosity and fiber volume fraction along the z-direction on the thermal conductivity were analyzed. The proposed model was validated by experimental results at room temperature. Further, the numerical methods developed in this study can provide guidance for predicting the thermal conductivity of C/C composites with complex structures.

Keywords

multiscalethermal conductivitycomposite
Type
Article
Information
Journal of Materials Research , Volume 35 , Issue 14 , 28 July 2020 , pp. 1888 - 1897
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Copyright
Copyright © Materials Research Society 2020

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