基于COMSOL三维仿真测定复合材料导热系数.docx

112传感器与微系统(TransducerandMicrosystemTechnologies)2018年第37卷第9期

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DOI:10.13873/J.1000—9787(2018)09—0112—02

基于COMSOL三维仿真测定复合材料导热系数*

丁杨1,2,周双喜1,黄神恩2,王中平2,魏永起2

(1.华东交通大学土木建筑学院，江西南昌330013;2.同济大学材料科学与工程学院，上海201804)

摘要：导热系数是评价材料保温隔热性的重要指标，但复合材料导热系数的测定往往受到各种环境条件的约束。分别选用复合材料导热系数理论计算公式和COMSOL软件仿真方法获得复合材料导热系数。并将理论计算结果和仿真结果分别与实测复合材料导热系数进行对比分析：理论计算所得的导热系数比实测数据偏低，且相对误差最高超过29%;COMSOL仿真结果与实测数据较为吻合，相对误差不超过5%。关键词：复合材料；导热系数；理论计算公式；三维热传导；COMSOL仿真

中图分类号：TQ02;TP304文献标识码：A文章编号：1000—9787(2018)09—0112—02

Determinationofthermalconductivitycoefficientof

*compositematerialsbasedon3DsimulationofCOMSOL

*

DINGYang1,2,ZHOUShuang-xi1,HUANGShen-en2,WANGZhong-ping2,WEIYong-qi2(1.SchoolofCivilandArchitecture,EastChinaJiaotongUniversity,Nanchang330013,China；

2.SchoolofMaterialsScienceandEngineering,TongjiUniversity,Shanghai201804,China）

Abstract:Thermalconductivitycoefficientisanimportantindextoevaluatethermalinsulationpropertiesofmaterials,butdeterminationofthermalconductivitycoefficientofcompositematerialsisoftenconstrainedbyvariousenvironmentalconditions.ThermalconductivitycoefficientsofcompositematerialsareobtainedbyusingthetheoreticalcomputationformulaofthermalconductivitycoefficientofcompositematerialsandthesimulationmethodofCOMSOLsoftware.Andtheresultsoftheoreticalcalculationandsimulationresultsarecomparedwiththemeasuredthermalconductivitycoefficientofcompositematerials.Itshowsthatthethermalconductivitycoefficientcalculatedtheoreticallyislowerthanthemeasureddata,themaximumrelativeerrorismorethan29%;COMSOLsimulationresultsiscoincidewiththemeasureddata,therelativeerrorislessthan5%.

Keywords:c