激光冲击驱动飞片成形性能.docx

第22卷第7期2014年7月

光学精密工程

OpticsandPrecisionEngineering

Vol.22No.7Jul.2014

文章编号1004-924X(2014)07-1743-08

激光冲击驱动飞片成形性能

周建忠，戴磊*,黄舒，孟宪凯，王霄，刘会霞

(江苏大学机械工程学院，江苏镇江212013)

摘要：研究了激光冲击驱动飞片成形中相关工艺参数对成形性能的影响。采用适合高压高应变率的Johnson-Cook模型，基于ANSYS/LS-DYNA软件平台，数值模拟了激光冲击驱动飞片成形胀形件过程中激光能量、成形模具孔径以及模具圆角率与成形件成形高度的关系。分析表明，随着激光功率密度、成形模具孔径和模具圆角率的增加，胀形件成形高度均随之增加，胀形件的最大成形高度为310.6μm。对厚度为50μm的铜箔材进行了激光冲击驱动飞片成形实验，利用体视显微镜和形貌测量仪对获得的胀形件试样进行了二维和三维形貌测试，验证了数值模型的合理性。本文建立的数值模拟分析方法为激光冲击驱动飞片成形胀形件过程的预测和控制提供了手段。

关键词：激光成形；激光冲击；飞片成形；数值模拟

中图分类号：TN249;TG665文献标识码：Adoi:10.3788/OPE1743

Formabilityoflasershock-inducedhighspeedflyers

ZHOUJian-zhong,DAILei,HUANGShu,MENGXian-kai,WANGXiao,LIUHui-xia

(SchoolofMechanicalEngineering,JiangsuUniversity,Zhenjiang212013,China)

*Correspondingauthor,E-mail:daileil010@126.com

Abstract:Theeffectofrelevantprocessparametersonformingpropertiesoflasershockflyerswasinvestigated.ByusingtheJohnson-CookmodelsuitableforahighpressureandahighstrainrateandANSYS/LS-DYNAsoftware,thelasershockinducedbulgeformingofflyerswassimulatedtoobtaintherelationbetweenthelaserenergies,formingdiediametersandformingdiefilletratesandtheheightsofformingparts.Theanalysisresultsshowthatasthelaserpowerdensity,formingdiediameterandthediefilletrateincrease,theheightsofbulgingpartsareincreased,andthemaximumheightofbulgingpartsis310.6μm.Finally,anexperimentoflasershockinducedformingofflyerswascarriedoutonacopperfoilwithathicknessof50μm.Thetwo-dimensionalappearanceandthree-dimensionalmicrotopographyofbulgingpartswereobtainedwithastereomicroscopeandamorphologymeasuringinstrument.Theresultsverifythereasonabilityofthenumericalmodel.Itconcludesthatthenumericalsimulation