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摘要：
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针对金属管材端部内卷成形加工工艺的力学特性进行了分析,基于Prandtl-Reuss流动法则,结合更新拉格朗日算法(Updated Lagrangian Formulation,ULF)建立了增量型弹塑性大变形有限元分析模型。以rmin法则处理边界及变形时弹塑性状态的转换,并用修正的库仑摩擦法则的增量型式来处理边界接触面上具有滑动与黏滞状态的摩擦现象,将其导入整体刚性矩阵中,推导出刚性方程。研究表明,成形过程中,管材端部的变形及成形负荷受引导筒及模具角度的影响。对比表明,有限元模拟与实验结果具有良好的一致性。
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The mechanical properties of inward coiling for the metal tube were analyzed.Under the assumption of Prandtl-Reuss flow rule,the incremental elasto-plastic large deformation finite element model was established based on the Updated Lagrangian Formulation(ULF).The elasto-plastic conversions of boundary and deformation were processed with rmin rule.The friction phenomenon that had slippage and viscosity at the boundary interface was handled with increment of revision Coulomb rule.The increment was led into the whole stiffness matrix,and derived out the stiffness equation.Finite element simulation and experimental result have a good consistency.
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基金项目：
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广东省自然科学基金资助项目(8151802904000001);;
深圳市科技计划(JC200903180641A)
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作者简介：
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参考文献：
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[1]Kitazawa K,Yamashita S,Kobayashi M.Inward curling ofcircular tubes by conical dies-curling of shells I[J].Journal ofJSTP,1987,28(316):481-487.
[2]Ichinose K,Masuda T.Inside-out inversion process of alumi-num tube under axial loading by conical die[J].Journal of Ja-pan Institute of Light Metals,1979,29(11):483-490.
[3]Manabe K,Nishimura H.Forming loads and forming limitsin conical nosing of tubes-study on nosing and flaring of tubesI[J].Journal of JSTP,1982,23(255):335-342.
[4]Samuel M.Experimental and numerical prediction of spring-back and side wall curl in u-bendings of anisotropic sheet met-als[J].Journal of Materials Processing Technology,2000,105(3):382-393.
[5]Manabe K,Nishimura H,Analysis of stresses and formingloads in conical nosing of tubes-study on nosing and flaring oftubes III[J].Journal of JSTP,1982,23(258):650-657.
[6]Hsu T C,Shien I R.Finite element modeling of sheet form-ing process with bending effects[J].Journal of MaterialsProcessing Technology,1997,63:733-737.
[7]Huang Y M,Lu Y H,Chen M C.Analyzing the cold nosingprocess using elasto-plastic and rigid-plastic methods[J].Journal of Materials Processing Technology,1992,30(3):351-380.
[8]Kitazawa K,Kobayashi M.Experimental study of deforma-tion mechanism in tube-end curling-curling of shells II[J].Journal of JSTP,1987,28(323):1267-1274.
[9]Kitazawa K,Kobayashi M,Yamashita S.Elementary ener-gy analysis of tube-end curling-theoretical analysis of tube andconical shell end curling I[J].Journal of JSTP,1988,29(331):845-850.
[10]Huang Y M,Lu Y H,Makinouchi A.Elasto-plastic finiteelement analysis of V-shape sheet bending[J].Journal ofMaterials Processing Technology,1992,35(1-3):129-150.
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