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简介：TheRichtmyer–Meshkovinstabilityofa‘V'shapedair/heliumgaseousinterfacesubjectedtoaweakshockwaveisexperimentallystudied.Asoapfilmtechniqueisadoptedtocreatea‘V'shapedinterfacewithaccurateinitialconditions.Fivekindsof‘V'shapedinterfaceswithdifferentvertexanglesareformedtohighlighttheeffectsofinitialconditionsontheflowcharacteristics.Theresultsshowthataspikeisgeneratedaftertheshockimpact,andgrowsconstantlywithtime.Asthevertexangleincreases,vorticesgeneratedontheinterfacebecomelessnoticeable,andthespikedevelopslesspronouncedly.Thelineargrowthrateofinterfacewidthaftercompressionphaseisestimatedbyalinearmodelandarevisedlinearmodel,andthelatterisproventobemoreeffectivefortheinterfacewithhighinitialamplitudes.Thelineargrowthrateofinterfacewidthis,forthefirsttimeinaheavy/lightinterfaceconfiguration,foundtobeanon-monotonousfunctionoftheinitialperturbationamplitude–wavelengthratio.

简介：Thispaperdemonstratestheplanestressstateandthestressfreethermo-elasticdeformationofFGMthickplateunderthermalloading.First,theSneddon-LocketttheoremontheplanestressstateinanisotropicinfinitethickplateisgeneralizedforacaseofFGMprobleminwhichallthermo-mechanicalpropertiesareoptionalfunctionsofdepthco-ordinate.TheproofisbasedonapplicationoftheIljushinthermo-elasticpotentialtodisplacementtypesystemofequationsthatreducesittotheplanestressstateproblem.Thenanexistenceofthepurelythermaldeformationisprovedintwoways:first,itisshownthattheuniquesolutionfulfilsconditionsofsimultaneousconstanttemperatureandlineargradationofthermalexpansioncoefficient,second,proofisbaseddirectlyonstresstypesystemofequationswhichstraightforwardlyreducestocompatibilityequationsforpurelythermaldeformationifonlystressfieldishomogeneousindomainandatboundary.Finally,coupleexamplesofapplicationtoanengineeringproblemarepresented.

简介：StraightandBentnano-cantileverspecimensarerespectivelyproposedtoinvestigatethesingle-modeandmixed-modecrackinitiationattheCu/Siinterfaceedgeinnanoscalecomponents.Withaminuteloadingapparatus,allnanoscalesamplesareinsituloadedandobserved.Numericalanalysisisemployedtoacquirethecriticalinterfacialstressdistributionsduringcrackinitiation.ThestressconcentrationregionsneartheedgeofCu/Siinterfaceinallspecimensarewithinthescaleof100nm,andthecriticalnormalandshearstresseshaveacircularrelationinnanoscalecomponents,whichrepresentsthefracturecriterionoftheinterfaceinnanoscalecomponents.

简介：Overcasting是过去常生产铝(固体)的一种新有点不一样的加入技术结合的/magnesium(液体)在这研究的二金属的材料。为Al/Mg(A390/AM60)二金属的样品，接口微观结构是研究点，它直接影响机械性质。因此，发现一个方法改进接口微观结构具有重要重要性。这研究在二金属的样品的A390/AM60接口微观结构上在液体Mg合金和热处理在钙(Ca)的效果上集中了增加。严峻的结果证明与在AM60的Ca增加，由于二个可能的原因，接口微观结构和A390/AM60二金属的样品的shear力量能被改进。热处理能进一步由溶解-Mg17Al12进-Mg并且破坏Mg2Si层结构。

简介：Duetotheminiaturizationofmoderndevicesre-quirecomponentswithlightweight,highintegra-tionandtheabilitytostoreenergyinassmallvol-umeaspossible.Asaresult,energystoragedensitybecomesanimportantfigureofmeritforenergystor-agedevices.Inthispaper,firstly,wediscussedtheenergydensityinfine-grainedleadzirconatetita-nateglass-ceramicscompositewiththehelpofthe

简介：激光粉末免职被使用制作Ti-6.5Al-3.5Mo-1.5Zr-0.3Si(wt%)/Ti-47Al-2Cr-2Nb-0.2W-0.15B(at%)双性人材料系统。当同样扔的-TiAl合金由组成时，同样扔的TC11合金显示出basket-wave-like形态学充分2/薄片状的微观结构。在处理期间考虑在TC11和-TiAl之间的热失配，接口微观结构进化被担心。转变小径被说明。艾尔元素和-stabilizers瞬间，Cr，和Nb的内容变化为在接口的微观结构的进化负责，这被发现。破裂表面在-TiAl方面被定位。双性人材料显示出一种易碎破裂的方式，与560的最终的张力的力量?MPa。