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《豎井頂模鑄造純鋁凝固過程溫度場(chǎng)和應(yīng)力場(chǎng)的數(shù)值模擬》由會(huì)員上傳分享,免費(fèi)在線閱讀,更多相關(guān)內(nèi)容在行業(yè)資料-天天文庫。
1、第38卷第2期昆明理工大學(xué)學(xué)報(bào)(自然科學(xué)版)Vol.38No22013年4月JournalofKunmingUniversityofScienceandTechnology(NaturalScienceEdition)Apr.2013doi:10.3969/j.issn.1007-855x.2013.02.003豎井頂模鑄造純鋁凝固過程溫度場(chǎng)和應(yīng)力場(chǎng)的數(shù)值模擬11,3,4234121賈瑞嬌,嚴(yán)繼康,邱哲生,楊鋼,施哲,甘國友,周永全,易健宏(1.昆明理工大學(xué)材料科學(xué)與工程學(xué)院,云南昆明65
2、0093;2.云南鋁業(yè)股份有限公司,云南昆明650502;3.昆明冶金研究院,云南昆明650031;4.昆明理工大學(xué)冶金與能源工程學(xué)院,云南昆明650093)摘要:針對(duì)豎井頂模半連續(xù)鑄造純鋁在凝固過程中的溫度場(chǎng)和應(yīng)力場(chǎng)進(jìn)行數(shù)值模擬.建立了純鋁半連續(xù)鑄造凝固過程中傳熱及熱應(yīng)力數(shù)學(xué)模型和有限元模型.充分考慮了材料及邊界條件的非線性特征,對(duì)邊界條件進(jìn)行了簡化和設(shè)置.利用Procast軟件對(duì)純鋁半連續(xù)鑄造凝固過程的溫度場(chǎng)進(jìn)行了模擬,并通過現(xiàn)場(chǎng)測(cè)溫試驗(yàn),驗(yàn)證了溫度場(chǎng)的正確性和有效性.同時(shí),應(yīng)用Procast應(yīng)力分析模塊模擬和分析了凝固過程的應(yīng)力場(chǎng)和縮孔縮孔分析,并對(duì)裂紋進(jìn)行了預(yù)測(cè),通過與現(xiàn)場(chǎng)
3、產(chǎn)品的裂紋對(duì)比,進(jìn)一步證明了應(yīng)力場(chǎng)和縮孔縮松的模擬和預(yù)測(cè)的有效性,從而能夠?yàn)闇p少缺陷提高質(zhì)量提供理論上的指導(dǎo).關(guān)鍵詞:純鋁;半連續(xù)鑄造;有限元;溫度場(chǎng);應(yīng)力場(chǎng)中圖分類號(hào):TG1462文獻(xiàn)標(biāo)識(shí)碼:A文章編號(hào):1007-855X(2013)02-0012-08NumericalSimulationofTemperatureandStressFieldsinSolidificationProcessingbyCastingPureAluminumBasedonShaftTopModel11,3,423JIARuijiao,YANJikang,QIUZhesheng,YANGGan
4、g,4121SHIZhe,GANGuoyou,ZHOUYongquan,YIJianhong(1.FacultyofMaterialsScienceandEngineering,KunmingUniversityofScienceandTechnology,Kunming650093,China;2.YunnanAluminumCo.,LtdKunming650502,China;3.KunmingMetallurgicalResearchInstitute,Kunming650031,China;4.FacultyofMetallurgicalandEnergyEngine
5、ering,KunmingUniversityofScienceandTechnology,Kunming650093,China)Abstract:Thetemperatureandstressfieldsinsolidificationprocessingbysemi-continuouscastingpurealuminumaresimulatedinthispaper.ThemathematicalandFEMmodelsofheattransferringandthermalstressanalysisarebuiltinsolidificationprocessin
6、gbysemi-continuouscastingpurealuminumbasedonshafttopmodel.Thenonlinearfeatureofmaterialandthesimplifiedboundariesconditionareset.Thetemperaturefieldsinsolidificationduringsemi-continuouscastingpurealuminumaresimulatedbyusingProcastsoftware.ThecorrectnessandvalidityofFEMcalculationareverifiedb
7、ytheactualtemperaturedata.Inthemeantime,thestressfieldsofsolidificationprocessaresimulatedbyusingProcaststressanalysismodule.Thecalculatedstressfieldsandshrinkageporesresultsfurtherverifythevalidityofsimulationandprediction.Thesimulatio