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Meeting Materials Science & Technology 2019
Symposium Formability and Fracture of Metal Sheets
Presentation Title Distortional Anisotropic Hardening Model for Describing Complex Bauschinger and Transient Effects in Metal Forming Simulations
Author(s) Myoung-Gyu Lee, Hongjin Choi, Jinwoo Lee, Hyukjong Bong, Kwang Seon Shin
On-Site Speaker (Planned) Myoung-Gyu Lee
Abstract Scope A new hardening law for describing complex flow behaviors of metals is proposed. The model is based on distortional anisotropic hardening concept developed to represent the Bauschinger and transient behaviors when loading directions are changed. The loading path changes are observed in metal forming process and their modeling in FE simulations is essential to enhance overall quality of process optimization. Particularly, this study focuses on the anisotropy of yield stress and hardening under reversed and orthogonal loadings, which is not well explained by kinematic hardening introducing translation of yield surface. Instead, distortion of yield surface as a function of plastic deformation can predict these features in efficient way. The model with properly suggested evolution equations for state variables are numerically implemented into user subroutines of an FE program, which is validated by reproducing unique features of anisotropic hardening responses in the examples of metal deformation under various loading path changes.
Proceedings Inclusion? Definite: At-meeting proceedings

OTHER PAPERS PLANNED FOR THIS SYMPOSIUM

A Method to Predict the Ductile Fracture of Metal Sheets under Complex Plane Stress
Anisotropic and Time-dependent Continuum Damage Coupled Plasticity Model for Predicting Ductile Fracture of AA 6xxx
Behavior of Quenched-and-Partitioned Steels Deformed at Elevated Temperatures
Biaxial Tensile Testing Using Laser-deposited Cruciform and Its Extension to Non-proportional Loading
Deformation Mode Effects on Austenite Stability of Quenched-and-Partitioned Steel Measured via X-ray Diffraction and Electron Backscattered Diffraction
Distortional Anisotropic Hardening Model for Describing Complex Bauschinger and Transient Effects in Metal Forming Simulations
Edge Stretchability of Hot Rolled High-strength Low-alloy Steel
Effect of Ultrasonic-assisted Two-point Incremental Sheet Forming (UA-TPIF) on Surface Finish
Mechanical Behavior of Ni and Cr added Bainite/ Martensite Multiphase Steels
Mitigation of Edge Cracking during Accumulative Roll Bonding of Aluminum Alloys
P3-90: Prediction Method of Voids Distribution in the Punched Surface of the Spheroidizing Annealed Medium Carbon Steel Sheet by the Scrap
Stress-strain Response in the Early Stage of Hydraulic Bulge Testing
Study of GP-zone/MgZn2 Precipitation Coupled with Deformation in Al-Zn-Mg-Cu to Overcome the Strength-ductility Paradox
The Influence of Phase Constituents on Hole Expansion Capacity of Multi-phase Steels

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