高温下平纹编织碳/酚醛复合材料等效热导率的理论预测及分析  

Theoretical prediction and analysis of equivalent thermal conductivity of plain-woven carbon/phenolic composites at high temperatures

作　　者：王一帆 王秋雨 曹涛锋 陈晨 陈磊 陶文铨 WANG Yifan;WANG Qiuyu;CAO Taofeng;CHEN Chen;CHEN Lei;TAO Wenquan(Key Laboratory of Thermo-fluid Science and Engineering,MOE,School of Energy and Power Engineering,Xi'an Jiaotong University,Xi'an 710049,China;National Key Laboratory of Solid Rocket Propulsion,The Institute of Xi'an Aerospace Solid Propulsion Technology,Xi'an 710025,China)

机构地区：[1]西安交通大学能源与动力工程学院,热流科学与工程教育部重点实验室,西安710049 [2]西安航天动力技术研究所,固体推进全国重点实验室,西安710025

出　　处：《固体火箭技术》2024年第5期667-674,共8页Journal of Solid Rocket Technology

摘　　要：高温下平纹编织碳/酚醛复合材料的热学性能研究是一个难点。根据材料的微观结构演变及热解机理,将三相周期性立方消融模型与现有的两相复合材料模型相结合,构建了平纹编织碳/酚醛复合材料热导率的理论预测模型。综合考虑酚醛基体孔隙率、增强碳纤维体积分数以及温度等因素,研究了酚醛和碳纤维材料、基于微观特征体积单元的碳纱线以及基于介观特征体积单元的平纹编织碳/酚醛复合材料在高温下热导率的动态响应,并对材料热导率的各向异性进行了分析。随着纱线含量的增加,碳/酚醛复合材料在平行织面和垂直织面上的热导率都会增加,并且平行织面方向的热导率比垂直织面方向大4~10倍。所建模型可以用于预测高温下酚醛材料及碳纤维材料、碳纱线和平纹织物复合材料的等效热导率。The study of the thermal properties of plain-woven carbon/phenolic composites at high temperatures is a challenge.A prediction model of thermal conductivity of plain-woven carbon/phenolic composites was established by combining the three-phase periodic matrix with existing two-phase composite material models based on the microstructural evolution and pyrolysis mechanisms of materials.Taking the porosity of phenolic matrix,the volume fraction of reinforced carbon fiber and temperature into account comprehensively,the dynamic response of thermal conductivity of phenolic and carbon fiber materials,carbon yarn based on microscopic characteristic volume unit and plain-woven carbon/phenolic composites based on mesoscopic characteristic volume unit at high temperature was studied,and the anisotropy of thermal conductivity of materials was analyzed.With the increase of yarn content,the thermal conductivity of carbon/phenolic composites both parallel and vertical to woven surfaces can be increased,and the thermal conductivity of composites parallel to woven surface is 4~10 times larger than that vertical to woven surface.The model can be used to predict the equivalent thermal conductivity of phenolic materials and carbon fiber materials,carbon yarn and plain fabric composites at high temperature.

关 键 词：平纹编织 碳/酚醛复合材料 高温热导率 

分 类 号：V258[一般工业技术—材料科学与工程]