|About this Abstract
||NUMIFORM 2019: The 13th International Conference on Numerical Methods in Industrial Forming Processes
||S-01: Modeling of the Anisotropic Behavior in Plasticity
||Characterization of Anisotropic Yield Criteria Using an Indentation Based Technique for Steel Sheets
||Tanmaya Mishra, Matthijn de Rooij, Meghshyam Shisode, Javad Hazrati, Dirk Schipper
|On-Site Speaker (Planned)
An indentation based method to characterize the yield locus for steel sheets is developed and implemented. Knoop hardness based indentation experiments have been performed on the surface as well as on the cross sections of an uncoated steel sheet to obtain the corresponding yield locus in the deviatoric and plane-stress plane. Stress ratios following the indenter’s geometry are used to plot the yield locus from indentation data. The stress ratios have been corrected for the material’s anisotropy by an optimization algorithm. Points are then plotted on the plane-stress plane using the corrected stress ratios, the strain increment vectors and indentation hardness data. The parameters for the quadratic Hill’s yield criteria are obtained from the indentation data based curve fitted yield locus and compared with that obtained from the traditional bulk loading tests. The method is designed to be implemented for yield loci characterization of thin, zinc coatings in galvanized steel for multi-scale modelling of friction in deep drawing.