简介：Onthebasesofhightemperaturecreepexperiments,theresearchonengineeringapplicationofrheologicalformingiscarriedoutontwokindsoflightmetalalloypartsnamedcylindricalshellofLc4aluminumalloyandvanediskwithcomplexcurvedsurfaceofTC11titaniumalloy.Moreover,themechanicalpropertytestsunderroomandhightemperaturesfortheworkpiecesproducedbythisnewtechniquearealsodone,theresultsshowedthattheyaremuchimprovedevidentlycomparedwiththoseproducedbytraditionalmethod.

简介：Atheoreticalstudyispresentedhereinonthepetallingofafully-clampedthinmetalplatestruckbyarigidconical-nosedprojectile.Itisassumedthattheenergyabsorbedinthepetallingprocessconsistsoftwoparts,onepartisduetothelocaldeformationduringtheholeformationandtheotherisfromtheglobalresponsesuchasbendingandmembranestretching.Variousenergyabsorbingmechanismsaredelineatedandanapproximateequationfortheballisticlimitisobtained.Ittranspiresthatthepredictionsfromthepresentmodelareingoodagreementwithtestdataavailablewhenthesensitivityofthestrainrateofthematerialistakenintoaccount.

简介：elasto塑料的弄弯和金属把压成薄片的纤维的postbuckling(FML)在这研究被学习。就结构和金属层的elastoplastic变丑的几何非线性而言，有起始的偏转的FML的增长VonKarman几何关系被建立。而且，采用混合变硬的规则的一种增长elasto塑料的组成的关系被介绍描绘金属层的压力紧张关系。随后，FML的增长非线性的管理方程使压缩负担遭到了到在里面飞机被导出，并且整个问题被反复的方法根据有限差别方法解决。在数字例子，起始的偏转，装载状态，和elasto塑料的弄弯和FML的postbuckling上的几何参数的效果分别地被调查。

简介：在表金属形成形成限制的预言在面对研究人员的最重要的挑战之中。在这份报纸，一个充分联合的elastic-plastic-damage模型被开发了并且实现进明确的代码。由于飞机压力和有限紧张理论的采纳，模型能快速并且精确地预言部分的变丑和损坏。另外，在一些操作的损坏开始，繁殖，和骨折与实验被预言并且验证。与连续统损坏力学相结合的有限紧张能被用作一个快工具在形成过程的表金属预言可锻的损坏，骨折，和形成的限制，这被结束。

简介：Thispaperinvestigatestheequivalentmodelforthefrictionboundaryconditionbetweenblankandholderduringsheetmetalformingsimulation,andproposesanequivalentalgorithm,thethicknessthresholdvaluealgorithm,forthefirsttimebasedonthicknessweighting.Thisalgorithmassumesthattheholderclearanceisuniformduringsheetmetalforming;andthemainreasonfortheunevennessoffrictionforcedistributionundertheholderisthattheunevendeformationoftheblankleadstoitsuneventhicknessdistribution,whichmakesthelocalpressureontheblankdistributedunevenly.Thealgorithmproposedinthispapercaneffectivelysimulatetheinfluenceoftheunevennessontheformingprocess.Validityofthisalgorithmisverifiedbyacomparisonbetweenthesimulationresultsandtheexperimentalonesforthedrawingprocessofacarspringbase.

简介：Inthisstudy,theresidualstrainofathinconductivemetalwireonapolymersubstrateafterelectricalfailureismeasuredwithSEMmoir′e.Focusedionbeam(FIB)millingisappliedtofabricatemicronmoir′egratingsonthesurfacesofconstantanwiresandtherandomphaseshiftingtechniqueisusedtoprocessmoir′efringes.Thevirtualstrainmethodisbrieflyintroducedandusedtocalculatetherealstrainofspecimens.Inordertostudytheinfluenceofadefectontheelectricalfailureoftheconstantanwire,experimentswereconductedontwospecimens,onewithacrack,whiletheotheronewithoutanycrack.Bycomparingtheresults,wefoundthatthedefectmakesthecriticalbeamcurrentofelectricalfailuredecrease.Inaddition,thespecimensweresubjectedtocompressionafterelectricalfailure,inagreementwiththeobservedcrackclosureofthespecimen.Thesuccessfulresultsdemonstratethatthemoir′emethodiseffectivetocharacterizethefull-fielddeformationofconstantanwiresonthepolymermembrane,andhasagoodpotentialforfurtherapplicationtothedeformationmeasurementofthinfilms.

简介：Theoilpanusedinearengineisoneoftheimportantstructurepartsinthecar,whichis,ingeneral,deepdrawnanddifficulttofrom.Thedeep-drawingprocessesoftheoilpanusedintheenginefor'SmallFlag'CaroflheFirstAutomobileManufactoryisanalyzedbyusingtheintegrativeCAD/CAE/CAMtechniqueofstampingdie,ineludingtheCADsoftwareCATIAandthesheet-metalstampingCAEsoftwareKMASdevelopedindependently.ThroughananalysisofdiestructureandformabilityusingtheKMASsoft-ware,theprimarytwi-offdeep-drawinghassuccessfullybeenchangedtotheone-offdeep-drawing,solvingthekeyteehniealdifficultiesforthemanufactory.

简介：Theelasto-plasticpostbucklingoffibermetallaminatedbeamswithdelaminationandtheenergyreleaseratealongthedelaminationfrontarediscussedinthispaper.Consideringgeometricalnonlinearity,thermalenvironmentandgeometricalinitialimperfection,theincrementalnonlinearequilibriumequationsofdelaminatedfibermetallaminatedbeamsareestablished,whicharesolvedusingthedifferentialquadraturemethodanditerativemethod.Basedonthese,accordingtotheJ-integraltheory,theelasto-plasticenergyreleaserateisstudied.Theeffectsofsomeimportantparametersontheelasto-plasticpostbucklingbehaviorandenergyreleaserateofthearamidreinforcedaluminumlaminatedbeamsarediscussedindetails.