Mechanical and thermal properties of 2.5D quartz fiber reinforced nano-porous resin-based composites

doi:10.19936/j.cnki.2096-8000.20230428.001

Abstract

Abstract: In this paper, 2.5D quartz fiber/nanoporous phenolic resin-based composites with excellent mechanical properties and low thermal conductivity were prepared by sol-gel process using 2.5D quartz fiber preform as reinforcement and nanoporous phenolic resin as matrix. The microstructure, heat transfer and mechanical properties of the composite were systematically studied based on the characterization and finite element analysis of mechanical and thermal conductivity. The results show that the resin presents a nanoporous three-dimensional network structure which effectively reduces the density (1.35 g/cm³) and thermal conductivity (0.18 W·m^-1·K^-1), and improves the thermal insulation performance of the material. Meanwhile, the mechanical properties and fracture behavior of 2.5D woven composites exhibit obvious anisotropy due to the bending warp and straight weft . In addition, a finite element model based on the actual material structure, mechanical and thermal properties was established and the effects of fiber volume fraction, matrix parameters and fiber parameters on thermal conductivity and elasticity modulus in different directions were studied.

Key words: thermal protection materials, 2.5D fiber preform, nano-porous phenolic resin, mechanical properties, finite element methods, composites

CLC Number:

TB332

SHEN Haochen, NIU Bo, ZHANG Qikai, HAO Jingying, ZHANG Yayun, LONG Donghui. Mechanical and thermal properties of 2.5D quartz fiber reinforced nano-porous resin-based composites[J]. COMPOSITES SCIENCE AND ENGINEERING, 2023, 0(4): 5-13.

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