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1、树脂基复合材料曲面结构件固化变形数值模拟马云荣*,贺继林,李栋,谭耀,徐雷(中南大学机电工程学院,长沙410083)摘要：研究分析了碳纤维增强树脂基复合材料在固化过程中密度、模量、热胀系数、比热、热传导系数等材料物性的变化，并将上述变化引入到数值模拟当中。针对复合材料复杂曲面件，提出了利用定常流动的流线方程构建曲线坐标系的新方法。根据建立的曲线坐标系，运用有限单元法计算了某轻型飞机机翼上蒙皮板在固化过程中的内部温度、固化度和内应力的分布情况以及材料物性随固化度的变化情况；计算了由于内部不均匀的温度场和固化度场、热膨胀系数的各向异性和固化引起的树脂体积收缩而导致的结构变形。研究表明：引入材
2、料物性变化使固化过程更加合理、结果更加精确，利用定常流动的流线方程构建的曲线坐标系完全适用于复合材料曲面件的有限元仿真。关键词：复合材料；曲面构件；曲线坐标系；有限元分析；内应力；固化变形中图分类号：TB330.1文献标志码：ANumericalsimulationofcuringdeformationofresinmatrixcompositecurvedstructureMAyunrong*,HEjilin,LIdong,TANyao,XUlei(Collegeofmechanicalandelectricalengineering,CentralSouthUniversity,Ch
3、angsha410083,China)Abstract:Theevolutionsofphysicalpropertiesduringthecuringprocessofthecarbonfibrereinforcedresincomposite,suchasdensity,modulus,coefficientofthermalexpansion,specificheatcapacityandthermalconductivitywereanalyzedandthoseevolutionswereintroducedintothenumericalsimulation.Thenewap
4、proachofconstructingthecurvilinearcoordinatesystembystreamlineequationofsteadyflowwasproposedwiththecomplexcurvedstructurecompositeasthestudyobject.Thedistributionofinternaltemperature,degreeofcure,internalstressesandevolutionsofphysicalpropertiesduringthecuringprocessofthecompositeskinplateofali
5、ghtaircraftwingwerecalculatedbyfinite-elementmethodandthecurvilinearcoordinatesystem,thenthedeformationoftheskinplatecausedbytheunevendistributionsoftemperaturefieldandcuredegreefield,anisotropicthermalexpansioncoefficientsandvolumetricshrinkageofresinwerecalculatedbythesamemethod.Fromthenumerica
6、lsimulationresults,itcanbeconcludedthatthecuringprocesswillbemorereasonableandmoreaccuratewhentheevolutionsofphysicalpropertiesofcompositesareadoptedandthecurvilinearcoordinatesystemconstructedbystreamlineequationofsteadyflowisfullyapplicabletofiniteelementanalysisofcompositecurvedstructure.Keywo
7、rds:composites;curvedstructure;curvilinearcoordinatesystem;finiteelementanalysis(FEA);internalstress；curingdeformation收稿日期：2014-06-16；录用日期：2014-09-18；网络出版时间：网络出版地址：DOI:基金项目：国家973计划（2014CB046500）通讯作者：马云荣，硕士研究生，研究方向为高性能复
