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Microstructures of Spruce Wood and Research of Biomimetic Sandwich Composite  
Microstructures of Spruce Wood and Research of Biomimetic Sandwich Composite
資料類型: PDF文件
關(guān)鍵詞: firry  wood  swich  microstructures  biomimetic  composite  
資料大小: 100K
所屬學(xué)科: 分子表征
來源: 第六屆亞歐研討會上處理和性能增強聚合物會議文集(2013.6.2-6 武漢)
簡介:
Throughtheevolutionofmanycenturies,woodachieveshigherstiffness,strength,fracturetoughnessandkeepitslightweightatthesametimes.Theeminentmechanicalandphysicalpropertiesofwoodarecloselyrelatedtotheexcellentmicrostructuresofwood.Inthispaper,ascanningelectronmicroscope(SEM)wasusedtocarefullyobservethemicrostructureofspruce,akindoflightwood.Theobservationresultsshowedthatwoodpossessakindoftypicalsandwichstructures,whichconsistsofcountlesswoodcells.Thewoodcellsarearrangedwithinterphaseformandparalleltothesurfaceofthewood.Morecarefulobservationshowedthateachwoodcellconsistofwood-fiberpliesandorganicmatrix.Thefiberpliesindifferentlocationsofthewoodhavedifferentdirectionswhichcomposeakindofhelicoidalmicrostructure.Basedontheobservation,thebucklingstrengthofthesandwichstructureofthewoodwasanalyzedbasedonitsrepresentedmodel.Thefunctionofthehelicoidal-fiberarrangementinimprovingthefracturetoughnessofthewoodwasanalyzedbasedontheideaoffiber-pulloutenergy.Theanalyticalresultsshowedthatthehelicoidalfiberarrangementcouldmarkedlyincreasethefracturetoughnessofthewood,whichwasverifiedwithaspecialexperiment.
作者: D. Yin, B. Chen , Z. Zhang
上傳時間: 2013-07-02 13:29:12
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