针刺密度对三维碳毡增强树脂炭复合材料力学性能的影响

doi:10.11896/cldb.18060142

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Abstract Needled carbon felt reinforced resin-based carbon composites was prepared by liquid impregnation-carbonization process (LPI) using non-woven cloth/web needle carbon fiber felt with different needle-punching densities as preform, and phenolic resin as precursor. Three-point bending and compression tests were employed to study the influence of needle density on the mechanical properties of resin-based carbon composites. The damage and failure mechanisms of needled carbon felt reinforced resin-based carbon composites were also discussed. The results show that the needle-punching density has a great influence on the pore size distribution of preform, it affects the impregnation-carbonization process, which consequently result in the mechanical properties of the resin-based carbon composites when the density of needled carbon felt is 0.4 g/cm³. In the meantime, when the needle depth is 13 mm, with the needle density increasing from 20 to 50 punch/cm², the flexural properties of composites increase firstly and then decrease. When the needle density is 40 punch/cm², the flexural properties of composites reach the highest. The main failure mode of bending is cracking failure of the bottom inverted “V” type. In addition, with the increase of the needle density, the transverse compression performance of the composite is basically unchanged, and the longitudinal compression performance is gradually improved. There are three failure modes of transverse compression such as stratification and interlayer failure, interlayer shear failure and resin-based carbon crushing failure. With the increase of needle density, the failure mode of longitudinal compression of composites is changed from interlayer delamination and shear failure to fracture failure of multilayer fibers.

Key words： needle density resin-based carbon composites mechanical properties failure mechanism

Published: 19 June 2019

CLC number:

TB332

Fund:This work was financially supported by the National Key Research and Development Program of China (2016YFC-0304301, 2016YFB0303200), the Science and Technology Transformation Foundation of Jiangsu Province (BA2016170), the Fundamental Research Funds for the Central Universities (JUSRP51718A), the Graduate Student Scientific Research Innovation Projects in Jiangsu Province (KYCX18-1836), a Project Funded by the Priority Academic Program Development of Jiangsu Higher Education Institutions (PAPD).

About author:: Kai Fanis currently a graduate student of the Textile and Apparel Institute of Jiangnan University. He gra-duated from Taiyuan University of Technology in 2015. Under the guidance of Prof. Kun Qian and Associate Prof. Xuefeng Lu, the main research direction is textile composites and C/C composites.Xuefeng Luis an associate professor and master's supervisor at the Textile and Apparel Institute of Jiangnan University. She received her B.S. degree in material forming and control engineering from East China Jiaotong University in 2005 and Ph.D. degree in materials science from the Central South University in 2012. Her main research interests are textile composites, nanofiber reinforcement composites, C/C composites, friction materials, and so on. She has published 18 papers in domestic and foreign journals such as Carbon, and applied for 12 invention patents and 7 authorizations.

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	FAN Kai
	LU Xuefeng
	ZHANG Diantang
	QIAN Kun

Cite this article:

FAN Kai,LU Xuefeng,ZHANG Diantang, et al. Effect of Needle Density on Mechanical Properties of Three-dimensional Carbon Felt Reinforced Resin-based Carbon Composites[J]. Materials Reports, 2019, 33(14): 2450-2455.

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http://www.mater-rep.com/EN/10.11896/cldb.18060142 OR http://www.mater-rep.com/EN/Y2019/V33/I14/2450

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