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1、第3卷第4期航空工程進展VolI3NO.42012年l1月ADVANCESINAERONAUTICALSCIENCEANDENGINEERINGNOV.2012文章編號:1674—8190(2012)04—447—06復合材料閉剖面加筋薄壁梁剛度系數(shù)計算分析張曉虎,孫秦,毋玲(西北工業(yè)大學航空學院,西安710072)摘要:復合材料的可設計性為通過彈性剪裁來獲得想要的變形模式帶來了優(yōu)勢,其結(jié)構的耦合特性如拉扭耦合和彎扭耦合可以利用復合材料的各向異性來實現(xiàn)。以薄壁殼結(jié)構力學理論為基礎,采用多種理論方法研究分析正交各向異性殼體本構關系,給出適合復合材料層壓板矩形閉剖
2、面薄壁梁截面的剛度系數(shù)解析表達;采用逐階近似方法,完整設計復雜閉剖面的剛度系數(shù)數(shù)值算法;針對兩種典型的復合材料鋪層的矩形閉剖面梁截面布局構型,進行剛度特性的計算分析與討論,獲得鋪層角度對復合材料薄壁梁彎曲、扭轉(zhuǎn)及彎扭耦合剛度特性的定量結(jié)果。對分析設計閉剖面薄壁結(jié)構剛度條件具有應用價值。關鍵詞:復合材料層壓板;正交各向異性;矩形閉剖面薄壁梁;剛度系數(shù);耦合剛度特性中圖分類號:V214.8文獻標識碼:AStiffnessCoefficientAlgorithmofThin—walledStiffenedBoxBeamofCompositewithClosedCro
3、ss—sectionZhangXiaohu,SunQin,WuLing(SchoolofAeronautics,NorthwesternPolytechniealUniversity,Xi’an710072,China)Abstract:Compositedesignsoffertheadvantageofachievingfavorabledeformationmodesthroughelastictailor—ing.Structuralcouplingsuchasextension-twistandbending~torsionarecreatedasa
4、resultoftheanisotropicpropertiesofcompositematerials.Basedonthestructuralmechanicstheoryoftwo—dimensionalthin-walledshellandprogressiveapproximationmethod,in-depthstudyOnthestiffnesscoefficientoforthotropicthin-walledboxbeamwithopenedandclosedcross~sectionsismade.Takingassumptionofh
5、omogeneousisotropicthin—walledboxbeam,differenttheoreticalapproachesareusedtOvalidatethecomprehensiveapplicabilityoftheanisotropicshelltheoryconstructed.Withapplicationoftheabove-mentionedtheory,acompletealgorithmisdesignedandprogrammedthroughFortranalgorithmiclanguagetOnumericallyc
6、omputethestiffnesscoefficientsofcomplexclosed—.cross—.sectionthin—.walledboxbeamwithcircumferentiallynon-uniformthicknessanddiscreteconcentrat—.edarea.Somenumericalexamplesarestudiedandthebending。twistingandcouplingstiffnesscoefficientsareobtainedrespectivelyfortwocompositeplylayout
7、sofrectangularthin-walledboxbeamwithclosed-section.Thereseultsarevaluableinacademicandengineeringapplicationsforthecontrollingofthestiffnessofthin-walledboxbeams.Keywords:compositelaminates;orthotropic;thin-walledboxbeam;stiffnesscoefficient;couplingstiffnesscharacteristics體結(jié)構設計的突出特
8、點,復合材料的用量已達機體0引言結(jié)構重