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简介：基于Zak的压力功能，有V槽口的双性人材料的压力奇特的eigen方程被获得。为双性人材料的垂直界面的V槽口的压力紧张因素的一个新定义被提出。效果砍模量和泊松是矩阵材料的比率，特征值上的属于的材料被分析。为双性人材料的垂直V槽口的精明的KI的概括表情借助于压力推测被获得。槽口深度，槽口角度和泊松的效果是V槽口的尖端附近的单个压力地上的材料的比率与数字模拟系统地被分析。作为一个例子，有在单轴的一致紧张下面的两倍边槽口的一个有限盘子被介绍的方法和对压力奇特的槽口角度和泊松的比率的影响在槽口的尖端附近计算被获得。

简介：LarixolgensisA.Henry(Changbailarch)isaproductivecommercialspeciesandgoodcandidateforafforestationinnortheastChina.Itiswidelyplantedinlead-stressedsoilswhichcaninduceoxidativedamageinthisplant.Increasingtolerancetolead(Pb)stressisthereforeofkeeninterest.Agreenhouseexperimentwasconductedtoidentifythebiomass,physiologicalresponsesandPbaccumulationofL.olgensisseedlingstoPbstressundersuccinicacid(SA)applicationandtoexploretheinteractionofexogenousSAapplicationsandstressresistance.L.olgensisseedlingswereplantedinPb-stressedorunstressedhapliccambisolsinpots.InPb-contaminatedsoilstheseedlingsweretreateddailywithconcentrationsofSAsolutionsatarateapproximatelyequivalentto0,0.04,0.2,1.0,or2.0mmolkg-1ofsoilfor10,20,and30days,respectively.Pbtreatmentinduceddamageintheseedlingsandledtotheinhibitionofbiomassaccumulationinroots,stemsandleaves,andariseinPbaccumulationinfinerootsandleaves.Malondialdehyde(MDA)contentandelectrolyteleakageinleavessignificantlyincreasedwhileperoxidase(POD)activities,solubleproteinandphotosyntheticpigmentcontentsinleaveswereallreduced.PhysiologicaltoxicitywaspromotedwithincreasingPbtreatmenttimes.WhenPb-stressedseedlingswereexposedtoSA(especially10.0mmolL-1over20days),thephysiologicalresponsesforPb-onlywerereversedandthebiomassofroots,stems,andleavesdramaticallyincreased.SAfacilitatedPbuptakeinfinerootsandleavesbutmorePbaccumulatedinfineroots.TheresultsdemonstratethatexogenousSAalleviatesPb-inducedoxidativeinjuriesandimprovesthetoleranceofL.olgensisseedlingstoPbstress.

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简介：由考虑界面的损坏并且用变化原则的效果，有界面的损坏的把压成薄片的盘子的三维的非线性的动态管理方程向精确压力分析基于一般six-degrees-of-freedom塔板理论被导出。为有界面的损坏的一个简单地支持的把压成薄片的盘子的interlaminar应力和非线性的动态反应的答案被使用有限差别方法获得，并且结果被比较与非线性的有限元素方法的答案验证。在数字计算，在接口和把压成薄片的盘子的非线性的动态反应的压力上的界面的损坏的效果被讨论。

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简介：象和局部剪切带逐渐明显(图2和5)，峰值应力以及相应轴向应变则不断减小(图8和9)；3.在大于2MPa的高压固结不排水试验中，其孔隙水压/轴向应变曲线明显不同于常压(图3)；4.上述与压力相关的力学性质均与黏土微观结构相关(图6和12)；5.高压下黏土难以达到所谓的临界状态。

简介：Vibrationfatigueisthemainfailuremodeofcompressorblade.Evaluatingthevibrationstressofbladethatleadstocrackingisveryusefulforanalysisofvibrationfatigue.Inthispaper,fatiguestressestimationmethodsbyquantitativefractographywerestudiedthroughexperimentalbladeandin-servicefirst-stagecompressorbladeinordertoevaluatetheinitiationvibrationstressofin-serviceblade.Theanalysisprocessofinitiationvibrationstresswasestablished.Theevaluatingresultofvibrationstressofin-servicebladesubjectedtocentrifugalforceandbendingvibrationstressagreeswithaeroenginetestresult.Itisshownthattheevaluationmethodcannotonlyevaluatetheequivalentfatiguestressesofdifferentcrackdepthsbutalsoyieldtheinitiationequivalentfatiguestress.

简介：我们在单轴的弯曲负担下面在Ｔ形榫眼和松开的雄榫(M<)家具关节在应力和紧张分布上学习了松开的雄榫尺寸的效果，并且决定了松开的雄榫长度的效果(30，45，60，并且90公里)并且把M<关节的时刻能力弄弯上的松开的雄榫厚度(6和8公里)与聚乙烯化合物的醋酸盐(PVAc)构造了粘合剂。在联合元素的压力和紧张分布然后为每个联合使用ANSYS有限元素(FE)被估计软件。关节的弯曲时刻能力与雄榫的厚度和长度显著地增加了。基于FE分析结果，在单轴的弯曲下面，最高砍压力价值在雄榫的中间的部分被获得，当时最高砍有弹性的紧张价值在在雄榫表面和榫眼的墙之间的胶水线被估计。砍强调在联合元素的有弹性的紧张价值通常与雄榫尺寸和相应弯曲时刻能力增加了并且砍。在预言的最大值之间有一致性砍关节的压力价值和失败模式。

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简介：Currentproceduresformass-flowhopperdesignarebasedontheradialstresstheorydevelopedbyJenikeandinvolvethedeterminationofthecriticaloutletdimensionsforflowtobeinitiated.Theseproceduresignorethesurchargeloadsonthehopperandinvolveastudyofthepassiveorarchedstressfieldthatexistsunderflowconditions.Analternativeapproachasappliedtohopperwallloadanalysisistoemploythehorizontalslicemethod.Thearchedstressfieldandhorizontalslicemethodsofanalysisarecompared.Theinfluenceofsurchargeloadsinthedeterminationofhoppergeometryisinvestigated.

简介：Formulationintermsofhypersingularintegralequationsfortheinteractionbetweenstraightandcurvedcracksinplaneelasticityisobtainedusingthecomplexvariablefunctionsmethod.Thecurvedlengthcoordinatemethodandasuitablenumericalschemeareusedtosolvesuchintegralsnumericallyfortheunknownfunction,whicharelaterusedtofindthestressintensityfactor,SIF.

简介：Theformationandevolutionofdeformationtextureinpolycrystallinematerialsarestudiedbyphase-fielddynamicmodel.Inaddition,thedrivingforceoftextureevolutionisalsodiscussed.Inthismodel,grainswithdifferentorientationaredefinedbyasetofcontinuousnon-conservedorderparameterfields.Simulationresultsshowthatgrainswithpreferredorientationgrowattheexpenseofthosewithunfavorableorientations.Itismoreimportantthat,elasticpotentialratherthanelasticenergyplaysacrucialroleintheevolutionoftexturewhetherthepolycrystallinesystemissubjectedtouniaxialstressorshearstress.

简介：MagneticBarkhausennoise(MBN)isaphenomenonofelectromagneticenergyduetothemovementofmagneticdomainwallsinsideferromagneticmaterialswhentheyarelocallymagnetizedbyanalternatingmagneticfields.AccordingtoFaraday’slawofelectromagneticinduction,thenoisecanbereceivedbythecoilattachedtothesurfaceofthematerialbeingmagnetizedandthenoisecarriesthemessageofthecharacteristicsofthematerialsuchasstresses,hardness,phasecontent,etc.Basedonthecharacteristicofthenoise,researchingabouttherelationshipbetweentheresidualstressintheweldingassemblyandthenoisearecarriedout.Furthermore,dataprocessisperformedbyRMS(RootMeanSquare)equationandPowerSpectrumanalysis.

简介：目的methotrexate(MTX)的最重要的副作用是mucositis。这研究的目的是在收到methotrexate的老鼠在肠的损坏和氧化应力上评估沉金摘录的效果。方法实验在划分成六个组的男Wistar白化体老鼠上被执行。首先组织收到的正常盐口头上地，第二个组收到了沉金摘录(100mg瑡潩?????????????????假吗？？

简介：BytheaftershockfrequencyestimationmethodbasedonthecalculationofcoseismicstaticCoulombstresschangesandrate-andstate-dependentfaultconstitutivelaw,wecalculatethefrequencyof"direct"aftershocksoftheWenchuanearthquakerelatedtocoseismicstaticCoulombstresschangesinitsaftershockzoneandtheareasnearby.Itshowsthatthefrequencyissignificantlylowerthanthetruthinthemainrupturezone,especiallyinthesouthernrupturezone,duetothedecreaseofstresslevelontheruptureplaneofthemainshockresultingfromcoseismicCoulombstresschange.ThestudyalsoshowsthattheeffectoftheCoulombstresschangeonthedurationofaftershockactivityisassociatedwiththelowerlimitmagnitude.Thedurationisabout15-16monthsforaftershocksaboveML4.0,andcloseto60monthsforaftershocksaboveML3.5.Inthisperiod,theratioofthe"direct"aftershockscausedbycoseismicCoulombstresschangerangesbetween44.7%to48.6%,whichsuggeststhat,eveninthe"effective"periodofcoseismicCoulombstresschanges,abouthalfoftheaftershocksonthemainshockruptureplaneareindependentofcoseismicCoulombstresschanges.Itispointedoutthatthoseaftershocksmayberelatedtotheaftersliportheviscoelasticrelaxation,whicharetimedependentcases.

简介：Inthepaper,sourcemechanismsof33small-moderateearthquakesoccurredinYunnanaredeterminedbymodelingofregionalwaveformsfromYunnandigitalseismicnetwork.TheresultshowsthatmostearthquakesoccurredwithinorneartheChuandianrhombicblockhavestrike-slipmechanism.TheorientationsofmaximumcompressivestressesobtainedfromsourcemechanismarechangedfromNNW-SSNtoNSintheareasfromnorthtosouthoftheblock,andtensilestressesaremainlyinENE-WSWorNE-SE.IntheeasternTibetanPlateau,theorientationsofmaximumcompressivestressradiatetowardoutsidefromtheplateau,andthetensilestressorientationsmostlyparalleltoarcstructures.Near28°Ntheorientationsofbothmaximumcompressivestressandtensilestresschangedgreatly,andtheboundaryseemstocorrespondtothesouthwesternextendedlineofLongmenshanfault.OutsideoftheChuandianrhombicblock,theorientationsofPandTaxesaresomedifferentfromthosewithintheblock.Thecomparisonshowsthatthesourcemechanismofsmall-moderateeventspresentedinthepaperisconsistencewiththatofmoderate-strongearthquakesdeterminedbyHarvardUniversity,whichmeansthesourcemechanismofsmall-moderateeventscanbeusedtostudythetectonicstressfieldinthisregion.

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