摘要
Byreplacingamediumwithreinforcingcomponentsorientedanddistributeduniformlyinamul-ti-dimensionalspace,aconstitutivemodelisconstructed.Thecomponentsareextended/compressedcompatiblywiththestrainandtheresultantofloadexertedonthemtobalancethestress.Theirload-elongationrelationcanbedeterminedfromaconventionalmaterialtest.Eachcomponentundergoesdifferentelongationhistorydependingonitsownorientationduringdeformation,sothatthemodelcansimulateelasto-plasticbehaviorofmaterialsun-derpolyaxialloadingconditions.Theincrementalconstitutivematrixbasbeenderivedforapplicationinnumeri-calanalysisandayieldcriterionisalsointroduced.Afewsubsequentyieldsurfaceshavebeenpredictedandcom-paredwithexperiments.
出版日期
1990年04月14日（中国期刊网平台首次上网日期，不代表论文的发表时间）
