文献类型：期刊文献

中文题名：2.5D石英纤维增强纳米孔酚醛树脂基复合材料的力学和传热性能

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

作者：沈昊辰[1];牛波[1];张琪凯[2];郝晶莹[2];张亚运[1];龙东辉[1]

机构：[1]华东理工大学化工学院,上海200237;[2]北京新风航天装备有限公司,北京100854

年份：2023

期号：4

起止页码：5

中文期刊名：复合材料科学与工程

外文期刊名：Composites Science and Engineering

收录：北大核心:【北大核心2020】；

基金：国家自然科学基金(22078100,52102098);上海市青年科技人才扬帆计划(20YF1410600)。

语种：中文

中文关键词：热防护材料;2.5D纤维预制体;纳米孔酚醛树脂;力学性能;有限元分析;复合材料

外文关键词：thermal protection materials;2.5D fiber preform;nano-porous phenolic resin;mechanical properties;finite element methods;composites

摘要：本文以2.5D石英纤维预制体为增强体,以纳米孔酚醛树脂为基体,通过溶胶-凝胶、常压干燥工艺制备了具有优异力学性能和低热导率的2.5D石英纤维/纳米孔酚醛树脂基复合材料,并基于力学和热导率的测试表征和有限元分析,系统研究了复合材料的微观结构、传热性能和力学性能。结果表明:酚醛树脂在微观上呈现纳米孔三维网状结构,有效地实现了较低密度(1.35 g/cm^(3))和低热导率(0.18 W·m^(-1)·K^(-1)),提升了材料的隔热性能;同时由于2.5D编织结构中经纱弯曲程度较高而纬纱分布较直,复合材料的力学性能和断裂行为展现出各向异性的特征。进一步建立了以实际材料结构、力学和热学参数为基础的有限元分析模型,预测了纤维体积分数、基体参数和纤维参数对复合材料不同方向热导率和弹性模量的影响规律。
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/cm^(3))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.