Transactions of Materials and Heat Treatment

Title：Application of inverse analysis method in automobile fender stamping process based on plastic total strain theory

Authors： TANG Bing-tao LU Xiao-yang XIE Hui

Unit： Shandong University Hunan University

KeyWords： inverse analysis sensitivity analysis sheet stamping drawbead

ClassificationCode：TG386

year,vol(issue):pagenumber：2011,36(5):27-32

Abstract：

Inverse analysis method was used as simulation tool based on deformation theory of plasticity. The objective function was expressed by the sum of thickness variation of each element before and after deformation. The intensities of the drawbead restraining forces were taken as design variables. Sensitivity analysis was implemented to optimize the distribution of drawbead restraining forces. These sensitivity information and the resulting strains and stresses distribution by inverse analysis method were given to the non\|linear constrained optimization algorithm FSQP, which updated the design variables in order to minimize the objective function. The optimized results were output until the iterations convergence. Numisheet'2002 drawing benchmark of a vehicle fender demonstrates that this strategy can quickly obtain the optimized process parameters, which is verified by incremental theory based on software Dynaform.

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Reference：

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