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Bingtao Tang, Deming Sun, Zhaoqing Wang, Zhen Zhao. A noval stress integration algorithm in inverse analysis method of sheet metal stamping[J]. Chinese Journal of Theoretical and Applied Mechanics, 2009, 41(3): 376-382. doi: 10.6052/0459-1879-2009-3-2007-645
Citation: Bingtao Tang, Deming Sun, Zhaoqing Wang, Zhen Zhao. A noval stress integration algorithm in inverse analysis method of sheet metal stamping[J]. Chinese Journal of Theoretical and Applied Mechanics, 2009, 41(3): 376-382. doi: 10.6052/0459-1879-2009-3-2007-645

A noval stress integration algorithm in inverse analysis method of sheet metal stamping

doi: 10.6052/0459-1879-2009-3-2007-645
  • Received Date: 2007-12-24
  • Rev Recd Date: 2008-06-30
  • Publish Date: 2009-05-18
  • An improved inverse analysis method is proposed for sheetmetal stamping based on the final workpiece in Euler coordinate system. Theprinciple of the virtual work is firstly adopted to obtain the equivalentequations. The constitutive equation in the present method is based on flowtheory of plasticity to consider the loading history, while deformationtheory of plasticity in the classical inverse analysis method. The plasticmultiplier \Delta \lambda is directly obtained with the concept ofthe equivalent stress in order to avoid numerous iterations inNewton-Raphson scheme \Delta \lambda. The numerical resultsobtained from the classical and improved inverse analysis methods arecompared with those from the incremental forward finite element solverLS-DYNA. It shows that the proposed constitutive equation is effective andreliable with the comparisons of blank configurations, Forming LimitedDiagram (FLD), the effective strain distribution and computationalefficiency.

     

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      沈阳化工大学材料科学与工程学院 沈阳 110142

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