基于织构分布与演化的铝合金成形性能研究

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1、上海交通大学硕士学位论文基于织构分布与演化的铝合金成形性能研究姓名：陆百迅申请学位级别：硕士专业：车辆工程指导教师：林忠钦20060201上海交通大学硕士学位论文形件的成形过程进行优化分析，通过改变毛坯摆放方向提高了零件成形性。本文将宏观力学性能与微观晶体结构的变化相结合对铝合金的成形性能进行研究，较为准确的评价铝合金的深冲成形性能，得到了适用于铝合金成形分析的成形极限图，为提高铝合金的冲压成形性能提供了可行的途径。对于增加铝合金等难成形的轻量化材料在车身上应用、降低轿车冲压件制造成本、缩短新产品开发周期有着重要的意义

2、。关键词：铝合金，织构，各向异性，成形极限图，冲压仿真–2–上海交通大学硕士学位论文STUDYONTHEFOMABILITYOFALUMINIUMALLOYBASEDONTHEORIENTATIONDISTRIBUTIONANDDEVELOPMENTOFTEXTUREABSTRACTIt’sanimportantwayofautomotivelightingtechnologytousealuminuminsteadofsteel.But,comparedwithsteel,aluminumalloyhaspoorfo

3、rmability,andeasytobewrinkleandcrack.Thereisn’tasystemtoevaluatetheformabilityofaluminumalloy.Thealuminumsheetusedinsheetformingispoly-crystalmaterialwithanisotropicproperty.Theanisotropyofsheetmetalexertsanevidentinfluenceontheformability.Theplasticanisotropyof

4、sheetmetalusuallycausedbycrystallographictexture,especiallyintermsoftheslipsystemsthatoperateduringplasticflowandtheorientationsofcrystals.It’saeffectivemethodtostudytheformabilityofsheetmetalthatcombiningthemicrostructureandthemechanicalproperty.Inthispaper,bas

5、edontheanalysisoftexture,theevolvementoftextureintensileisdeveloped.Basedoncrystallineplasticity,therelationshipofLankfordparameterrandtexturedistributionandthelawofrverifiedwithtensileisdeveloped.TheinfluenceonformabilityofthemeanLankfordparameterrandtheplanean

6、isotropyisstudiedbylimiteddrawingdepthexperiments.Theforminglimiteddiagramisdevelopedbythetexturedistributionandcrystallineplasticity,andvalidatedbyexperiments.Furthermore,theformingprocessofboxpartisstudyandoptimized.Inthispapertheformabilityofaluminumalloyisst

7、udiedbycombingthetexturedistributionandmacroanisotropyparametersandevaluatedexactly.TheFLDofaluminumalloyisdeveloped.Theresearchhasgreatsignificanceinimprovingtheapplicationoflightweightmaterialwithlowformabilitysuchasaluminumalloysheetintheuseofauto-body,aswell

8、asdecreasingthemanufacturingcostofauto-partsandreducingtime-to-marketofnewproduct.KEYWORDS:Aluminumalloy,Texturedistribution,Anistropy,FLD,FormingSimulation–3–上海交通大学学