1、例17鋁板焊接溫度場(chǎng)分析實(shí)例多層多道焊17.1問(wèn)題描述模擬一塊鋁合金板材多層多道焊接過(guò)程。17.2建立有限元模型MAINMESHGENERATIONNODES:ADD（創(chuàng)建4個(gè)節(jié)點(diǎn)）0000.05000.050.05000.050ELEMENTS:ADD（用上述4個(gè)節(jié)點(diǎn)創(chuàng)建單元）1234ENDLIST#SUBDIVIDE（進(jìn)行網(wǎng)格劃分，采用疏密網(wǎng)格過(guò)渡）DIVISIONS20201BIASFACTORS0.3500ELEMENTSALL:EXISTINGRETURNISC.Iarclentat2005r2（32bit）（OpenGL）:Model20.MudDIVISIONS20201BIAS

2、FACTORS0.3500SUBDIVIDEELEMENTSCURVESRESETREFINEELEMENTSTOQUADELEMENTSTOHEXATT-CTTCT-ITTUT口ELEMENTS:STSEIOLDfillerSWEEALRENUALSELECEXPANDTRANSLATIONS00-0.001RPETITIONS10ELEMENTSALL:EXISTINGRETURN（創(chuàng)建的網(wǎng)格模型如下圖）fillerOK（選中圖中所示的綠色區(qū)域）ALL:SELECTSELECTSET:MAKEINVISIBLEELEMENTS:STOREsolidOKALL:VISIBLE17.3施加材料

3、性能MATERIALPROPERTIESNEW（定義母材和填充材料的材料性質(zhì)）ISOTROPICYOUNGSMODULOUS69e9POSISONSRATIO0.33MASSDENSITY2700PLASTICITYELASTIC-PLASTICINITIALYIELDSTRESS8e8THERMAL.EXPCOEFFICIENT23.1e-6OKHE00DAMAGEFAILURE0REMOVEOK24ISOTROPICPROPERTIESTABLEYOUNGSMODULUS6.9e+010TABLEPOISSONSRATIO0.33MASSDENSITY2700COST/VOLUMECOST

4、/MASS*THERMALEXP.PLASTICITYCURESHRINKAGE+ELASTIC-PLASTICRIGID-PLASTICFORMINGLIMITRATEEFFECTSDAMAGEEFFECTSVISCOELASTICCRACKINGGRAINSIZEONDUCTIVITY8802700DAMPINGOKELEMENTS:ADDALL:EXISTINGRETURN17.4建立焊接MODELINGTOWEIDFILLENEWNAME:wPARAMRS定義填充材料為恒溫?zé)嵩矗?400RESETREMCV：OkMASSDENSITY2700-S：MISSIVIT（選定填充材料）LAT

5、ENTHEATMETHODHEATTRANSFERPROPERTIESTABLETABLETABLECURING800+ENTEREDVALUESUSERSUB.ANKONDCONDUCTIVITYTYPE+ISOTROPICORTHOTROPICANISOTROPICMELTPOINTTEMP:660ELEMENTS:ADD（選定圖中所示的粉色單元）ENDLIST#NEW（定義填充材料2，為恒溫?zé)嵩矗㎞AME:weldfiller2PARAMETERS:MELTPOINTTEMP:660ELEMENTS:ADD（選定圖中所示的橙色單元）ENDLIST#NEW（定義填充材料3，為恒熱流密度源）

6、NAME:weldfiller3ELEMENTS:ADD（選定圖中所示的黃色單元）ENDLIST#RETURNEDIT0isNAMEweldfilllCOPYweldfilllelementsPARAMETERS*MELTPOINTTEMP660weldfill2elementsTEMPRAMPTIMEFILLERBOUNDINGBOXDEFAULTweldfp.113elementsINITIAL*DEACTIVATEDQUIETELEMENTSADDREMTABLESIDUELDFILLEFnextSELECTSELECTSET:weldfiller1MAKEINVISIBLEPATHIN

7、PUT:NODESNODES:ADD選中圖示中最上面的2個(gè)節(jié)點(diǎn)ENDLIST#ORIENTATIONINPUTMETHODNODES:ADD選中圖示中的最下面的那個(gè)點(diǎn)ENDLIST#同樣的方法定義焊接路徑2，317.5設(shè)CONTACONTACTBODIESNEWNAME:filler1DEFORMABLEOKELEMENTS:ADDSETfiller1OKALL:SELECTENDLIST#NEWNAME:filler2DEFORMABLEOKELEMENTS:ADDSETfiller2OKALL:SELECTENDLIST#NEWNAME:filler3DEFORMABLEOKELEMENT

8、S:ADDSETfiller3OKALL:SELECTENDLIST#NEWNAME:solidDEFORMABLEOKELEMENTS:ADDSETsolidOKALL:SELECTENDLIST#（接觸體如圖所示）CONTACTTNEWPROPERTIESFIRST1:2CONTACTTYPE:GLUETHERMALPROPERTIES:CONTACTHEATTRANSFERCOEFFICIENT:1e6OKRETURNRETUEN同樣的操作定于接觸體1與3，1與4，2與3，3與4之間的接觸關(guān)系17.6設(shè)置邊界條BOUNDARYCONDITIONSNEWNAME:flux1（指定焊接熱源為

9、體熱源）BOUNDARYCONDITIONSTYPETHERMAL:MOREVOLUMEWELDFLUXFLUX（on）DIMENSIONS:（定義焊縫的尺寸）WIDTH:0.006DEPTH:0.006FORWARDLENGTH:0.004REARLENGTH:0.01MOTIONPARAMETER:（指定熱源的運(yùn)動(dòng)參數(shù)）VELOCITY:0.0025WELDPATH:weldpath1WELDFILLER:weldfiller1OKRE同樣的條件定義NEWELMETHOD斗ENTEREDVALUESUSERSUB.UUELDFLUXFLUXFLUXPARAMETERSMAX.DISTAN匚

10、ETABLEMOTIONPARAMETERSINITIALWELDPOSITIXMENTS：ADD0-0025WELDBATEOFFSET-YweldfilllUF.LDFILLERMAGNITUDEweldpathlNAME:flux3（指定焊接熱源為體熱源）VOLUMEWELDFLUXFLUX（on）MAGNITUDEPOWER3000EFFICIENCY0.7DIMENSIONS:（定義焊縫的尺寸）WIDTH:0.008DEPTH:0.008FORWARDLENGTH:0.005REARLENGTH:0.012MOTIONPARAMETER:（指定熱源的運(yùn)動(dòng)參數(shù)）VELOCITY:0.0

11、025WELDPATH:weldpath3WELDFILLER:weldfiller3OKNEWBOUNTABLE0CLEAROKVOLUMEWELDFLUXMETHODENTEREDVALUESUSERSUB.UUELDFLUXVETBCITVweldpathlIOFFSET-XOFFSET-Yweldfill3UELDFILLERELERETNAME:film，MOTIONPARAMETERSIEnktsiaddeedPOSITlIVLE1NTSADDINGjj00025UELDPATI0FLUXPARAMETERSMAGNITUDEPOWER3000TABLEEFFICIENCY0.7T

12、ABLESCALEFACTORDIMENSIONSWIDTH0.003TABLEDEPTH0.000TABLEFORWARDLENGTH0.005TABLEREARLENGTH0.012TABLEMAX.DISTANCE0TABLEFLUXFILMCOEFFICIENT:20SINKTEMPERATYRE:60OKFACEFILMMETHODSINKPOINTMETHODSINGLESINKPOINTUSERSUB.FILMSINKPOINTGROUPFILMCOEFFICIENT20TABLESINKTEMPERATURE60NEWNAMMACFNATURALCONVECTIONCOEFFI

13、CIENTEXPONENTENDLIST#RADIATIONZTURN:件如下圖）TABLETABLETABLETABLENODESENDLIST(#)NEWNAME:fix_zMACHANICALFIXEDDISPLACEMENTONZDISPLACEMENTOKNODES:ADD(選擇底邊上的所有端點(diǎn))ENDLIST(#)LOADCASESNEWCOUPLEDQUASI-STATIC(定義載荷工況1,焊接過(guò)程)LOADS:flux1(on)film(on)fix_xy(on)fix_z(on)OKOKMAXERRORINTEMPERATUREESTIMATE:50OKFIXED:CONST

14、ANTTIMESTEP:PARAMETER:#STEP:50OKOKvolumeweldfluzvolumeweldfluzvolumeweldfluzfacefiliiLfixed_disp1acenientfixed_disp1acementLi匕uuuzn丄一niniiu匕曲辰目nc丄氏代hHfli.ix2flux3STEPPINGPROCEDURE0.5iivfahamei匕詼r自同樣的方法義載荷工況2,飛TOTALLOADCASETIME20SELECTLOADSAPPLIEDLOADSfIukIPARAMETERSCOUPLEDQUASI-STATICPARAMETERSSELEC

15、TLOADSAPPLIEDLOADSfIukIvolumeweldfIukvolumeweldfIukvolumeweldfIukfacefilmfiKed_disp1acementfised_disp1acementf1uk2f1uk3filmFIXEDSTEPPING(CONSTANTTIMESTEP)NEWCOUPLEDQUASI-STATIC(定義載荷工況4，焊后的冷卻過(guò)程)LOADS:film(on)fix_xy(on)fix_z(on)OKAPPLIEDLOADSCONTACTTABLE:ctable1OKCONVERGENCETESTINGMAXERRORINTEMPERATUR

16、EESTIMATE:50OKTOTALLOADCASESTIME:500ADAPTIVE:TEMPERATUREPARAMETERS:MAX#INCRENMENTS:500INITIALTIMESTEP:1OKOKSELECTED:lcases3lcases1lcases2lcases4INITIAfilm(on)iDS:flux3(on)COUPLEDTHERMALMECHANICALANALYSISCLASSLOADCASESCLEARSELECTEDAVAILABLEIcaseS1easel1easellease2lease2IcaseSlease4fix_xy(on)fix_z(on)

17、BOUNDARYCONDITIONSCLEARf1UK1VO1UTlLR_We1d_fIukvo1umeweldfluxflux3vo1umeweldfIukfiliiLfacefiliiLfiked_disp1aceiiLentfiKed_disp1acementCONTACTCONTROLCONTACTTABLE:ctable1OKJOBRESULTSStress(on)EquivalentVonMisesStress(on)TotalEquivalentPlasticStrain(on)OKJOBRESULTSPOSTFILETBINARYOUTPUTFILEIVDEFAULTSTYLEIFREQUENCY1FLOWLINESSELECTEDELEMENTQUANTITIESCLEARLAYERS/ZZZZZZZZZZZZZC/LjlStressTDEFAULTEquivalentVonMisesStressTDEFAULTTotalEoKalentPlastic：StrainTDEFAULTCOUPLED3-DSOLID:117OKALL:EXISTINGCHECKRUN117noneSTATUSComplet已155(1)SINGULARITY