abaqus子程序usdfld

1、AbaqusCAEUsersManual12.8.5Definingfieldvariablesatamaterialpoint（在一個(gè)材料點(diǎn)定義場(chǎng)變量）InAbaqusStardyoucanintroducedependenceonsolutionvariableswithusersubroutineUSDFLD.Thissubroutineallowsyoutodefinefieldvariablesatamaterialpoint

2、asfunctionsoftimeofanyoftheavailablematerialpointquantitieslistedin‘‘AbaqusStardoutputvariableidentifiers’’Section4.2.1oftheAbaqusAnalysisUsersManual，ofmaterialdirections.Materialpropertiesdefinedasfunctionsofthesefieldv

3、ariablesmay，thusbedependentonthesolution.UsersubroutineUSDFLDiscalledateachpointfwhichthematerialdefinitionincludesareferencetotheusersubroutine.（在ABAQUS里面，你能夠用子程序USDFLD來(lái)求解變量。USDFLD允許你將一個(gè)材料點(diǎn)上的場(chǎng)變景定義為時(shí)間函數(shù)，能夠使用到的材料點(diǎn)在用戶使用手冊(cè)4

4、.2.1節(jié)中“abaqus輸岀變量的標(biāo)識(shí)碼”中被提及到。材料的特性被定義作為場(chǎng)變量的函數(shù)，因此依賴于求解方法。）（在每個(gè)被定義材料性能的點(diǎn)USDFLD能夠被調(diào)用）ToincludeareferencetousersubroutineUSDFLDinamaterialdefinition:1.FromthemenubarintheEditMaterialdialogboxGeneral―UserDefinedField.（Finfmati

5、onondisplayingtheEditMaterialdialogboxsee“Creatingeditingamaterial’’Section12.7.1.）2.ClickOKtoclosetheEditMaterialdialogbox.AlternativelyyoucananothermaterialbehavitodefinefromthemenusintheEditMaterialdialogbox（see“Brows

6、ingmodifyingmaterialbehavis，’’Section12.7.2fmeinfmation）.AbaqusCAEUser’sManualoo（子程序USDFLD在材料屮的定義過(guò)程可參考下面：Overview（概述）UsersubroutineUSDFLD:?allowsyoutodefinefieldvariablesatamaterialpointasfunctionsoftimeofanyoftheavailab

7、lematerialpointquantitieslistedintheOutputVariableIdentifierstable(‘‘AbaqusStardoutputvariableidentifiers，’’Section4.2.1oftheAbaqusAnalysisUser’sManual)excepttheuserdefinedoutputvariablesUVARMUVARM?canbeusedtointroduceso

8、lutiondependentmaterialpropertiessincesuchpropertiescaneasilybedefinedasfunctionsoffieldvariables?willbecalledatallmaterialpointsofelementsfwhichthematerialdefinitionincludesuserdefinedfieldvariables?mustcallutilityrouti

9、neGETVRMtoaccessmaterialpointdata?canuseupdatestatevariables?canbeusedinconjunctionwithusersubroutineUFIELDtoprescribepredefinedfieldvariables.（子程序USDFLD:1.允許你在一個(gè)材料點(diǎn)定義場(chǎng)變量作為時(shí)問(wèn)函數(shù)，在輸出變量的標(biāo)示符中列fli了所有材料點(diǎn)的變量，除了用戶定義的輸出變量和uvarmuv

10、arm。2.能夠用來(lái)介紹材料的性能，并且這種性能能夠被定義為場(chǎng)變量的函數(shù)。3.在各元索的材料點(diǎn)中，用戶定義的場(chǎng)變量能夠被調(diào)用。4.必須調(diào)用使用程序GETVRM來(lái)接入材料點(diǎn)數(shù)據(jù)5.可以和UF1ELD一起使用來(lái)描述預(yù)定義的場(chǎng)變景）Explicitsolutiondependence(明確解的關(guān)系)Sincethisroutineprovidesaccesstomaterialpointquantitiesonlyatthestartofth

11、eincrementthesolutiondependenceintroducedinthiswayisexplicit:thematerialpropertiesfagivenincrementarenotinfluencedbytheresultsobtainedduringtheincrement.Hencetheaccuracyoftheresultsdependsonthesizeofthetimeincrement.Ther