摘要
Anonlinearfiniteelement(FE)modelbasedondomainswitchingwasproposedtostudytheelectromechanicalbehaviorofferroelectricceramics.TheincrementalFEformulationwasimprovedtoavoidanycalculationinstability.Theproblemsofmeshsensitivityandconvergence,andtheefficiencyoftheproposednonlinearFEtechniquehavebeenassessedtoillustratetheversatilityandpotentialaccuracyofthesaidtechnique.Thenonlinearelectromechanicalbehavior,suchasthehysteresisloopsandbutterflycurves,offerroelectricceramicssubjectedtobothauniformelectricfieldandapointelectricpotentialhasbeenstudiednumerically.Theresultsobtainedareingoodagreementwiththoseofthecorrespondingtheoreticalandexperimentalanalyses.Furthermore,theelectromechanicalcouplingfieldsnear(a)theboundaryofacircularhole,(b)theboundaryofanellipticholeand(c)thetipofacrack,havebeenanalyzedusingtheproposednonlinearfiniteelementmethod(FEM).TheproposednonlinearelectromechanicallycoupledFEMisusefulfortheanalysisofdomainswitching,deformationandfractureofferroelectricceramics.
出版日期
2005年03月13日（中国期刊网平台首次上网日期，不代表论文的发表时间）
