学科分类
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2 个结果
  • 简介:InordertoexplorethefeasibilityofusingX-raytomeasuremoisturecontentinthedryingprocessandhaveafurtherstudyontheeffectofprecisionofmoisturecontentwhenscanningthroughdifferentgraindirections,X-rayscanningmethodandweightingmethodwereusedtomeasureaveragemoisturecontentofCunninghamialanceolataduringhotairdrying.Theresultsshowthatthemoisturecontentvaluesoftwomethodswereveryclosetooneanother,thedeterminationcoefficientsofbothwerehighlycorrelatedwithavalueover0.99,andtheabsolutedeviationwasbelow2%;whenscanningalongradialdirectionandlongitudinaldirection,theprecisionsofaveragemoisturecontentwerehigherthanthatofthetangentialdirection,butthedeviationcanbenegligibleintheactualmeasurement;inthepracticalapplication,theeffectofgraindirectiononprecisionofmoisturecontentmeasurementcouldnotbetakenintoaccountwhenusingX-raytomeasurethemoisturedistributionofwood.

  • 标签: X-RAY SCANNING MOISTURE content WOOD DRYING
  • 简介:影响在海水沉浸,以及结果在潮湿散开上把聚合物矩阵composites的厚度压成薄片为glass/isopolyester(G/IPE)的composites的机械性质降级,carbon/isopolyester(C/IPE),glass/vinylester(G/VE)和carbon/vinylester(C/VE),在这份报纸被调查。把3压成薄片并且在厚度的10mm,使用湿手上篮技术制作,被描绘因为在人工的海水媒介的潮湿吸收,和他们的曲折力量和interlaminar砍力量(ILSS)降级被学习。潮湿散开被观察是到Ficks的anamolous为3的法律和10mm在散开的以后的阶段的厚样品。10mmthick样品的潮湿渗透是比3mm的大的二~三份订单厚的,当潮湿浸透的时间仍然保持未改变时。随增加把厚度压成薄片,1.4%为C/VE增加的潮湿浸透并且7%为G/IPE。剩余曲折力量和ILSS在10mm的情况下是更大的在200天暴露以后的厚标本。折断的标本的SEM检查在10mm显示出纤维/矩阵debonding的更大的层次厚标本。

  • 标签: 复合材料层压板 水分扩散 聚合物基体 人工海水 厚度 层间剪切强度