平板搭接雙焊縫MARC元模擬

平板搭接雙焊縫MARC元模擬(讀書報(bào)告、研究報(bào)告)考核科目:焊接過程建?；A(chǔ)學(xué)生所在院:材料科學(xué)與工程(系)學(xué)生姓名學(xué)號(hào)離平板搭接焊縫雙側(cè)焊(搭接40mm)各個(gè)點(diǎn)坐標(biāo)。(建立模型過程中采用國(guó)際單位制m)(1)生成點(diǎn)PTS:ADD000000000DUPLICATETRANSLATIONS00POINTSALL:EXISTPTS:ADD000DUPLICATETRANSLATIONS00POINTS(2)連線，生成二維模型如下圖(1)所示：(3)二維網(wǎng)格劃分IONSIXDIVISIONSDIVISIONSPLLYCURVEDIVISIONS邊界，右鍵確定NSxyzFACTORSxyz的節(jié)點(diǎn)到板的中心，得到下OMESHONS00REPETITION25LEXISTLLSETTINGSETTINGMATERIALPROPERTIESUNGERSMODULUSOISSONSRATIOMASSDENSITY7800PLASTICITY:ELASTIC-PLASTICTHERMALEXP.1.2E-5TRANSFERONDUCTIVITYCIFICHEATMASSDENSITY7800DALLEXISTMODELINGTOOLSWELDPATHSNEW(weldpath1)PATHINPUTMETHODNODES:ADDORIENTATIONINPUTMETHODNODESADDNEW(weldpath2)PATHINPUTMETHODNODES:ADDORIENTATIONINPUTMETHODNODESADDWELDFILLERSNEWELEMENTSADDWADDBOUNDARYCONDITIONSWALOREVOLUMEWELDFLUXPOWER2600CIENCYIDTHHFORWARDLENGTHRLENGTHELOCITYWELDPATHWeldpath1EMENTAddALL:SETOK(apply1)WELUMEWELDFLUXPOWER00YTHDLENGTHHTYWELDPATHWeldpath1ddLSETWLMCOEFFICIENTNKTEMPERATURED ICALNTSPLACEMENTXSADDICALNTLACEMENTY (apply4)ODESADD，確定(apply5)WHANICALLACEMENTDISPLACEMENTZODESADD，確定(apply6)LOADCASESCOUPLEDQUASI-STATICCONVERGENCETESTINGDISPLACEMENTSLESISPLACEMENTTOLERANCEMAXERRORINTEMPERATUREESTIMATE30TOTALLOADCASETIME25NTTIMESTEPRSSTEPS5NEWloadcase)TICCETESTINGEMENTSISPLACEMENTTOLERANCEMAXERRORINTEMPERATUREESTIMATE30TOTALLOADCASETIME25NTTIMESTEPRSSTEPS5WTICCETESTINGEMENTSISPLACEMENTTOLERANCEMAXERRORINTEMPERATUREESTIMATE30TOTALLOADCASETIME000ADAPTIVETEMPERATURERSMAX#INCREMENTS500INITIALTIMESTEP1ILABLENALYSISOPTIONSCITYPROCEDUREASSCAPACITYalentVonMisesStressitor30S云紋圖(焊接由焊縫一轉(zhuǎn)移到焊縫二)S30S時(shí)第二道焊縫1)熔池位置的橫向應(yīng)力很小，這是由于此時(shí)材料軟化造成。2)電弧的前端位置為壓縮應(yīng)力，這是由于該處材料受熱膨脹，而受周圍材分時(shí)從密到疏的方向。網(wǎng)格劃分找不到閉合單元因?yàn)榫€