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Meeting 2016 TMS Annual Meeting & Exhibition
Symposium Material Behavior Characterization via Multi-Directional Deformation of Sheet Metal
Presentation Title Predicting Cyclic Deformation of AA6022-T4 and DP590 Using Polycrystal Plasticity
Author(s) Milovan Zecevic, Marko Knezevic
On-Site Speaker (Planned) Milovan Zecevic
Abstract Scope We present a polycrystal plasticity constitutive law based on the elasto-plastic self-consistent theory for the prediction of cyclic tension-compression deformation of AA6022-T4 and DP590. The model features a hardening law based on dislocation density and an evolution law for backstress at the level of slip systems. Additionally, the model for DP590 includes a geometrically necessary dislocations layer around the martensitic phase to mediate the phase-to-phase interactions. From the comparison of the predictions and experimental data, we infer that the backstresses have a dominant effect in capturing non-linear unloading while both the backstresses and inter-granular stresses govern the Bauschinger effect, and finally that reversible dislocation motion is key for capturing hardening rates during reverse loading. To facilitate treatment of complex deformation processes with heterogeneous boundary conditions, the model is subsequently incorporated within implicit finite-element frameworks and applied to several case studies in sheet metal forming.
Proceedings Inclusion? Planned: A print-only volume


A Novel In-situ Planar Biaxial Experiment
Advanced Cruciform Testing at the NIST Center for Automotive Lightweighting
An Experimental and Microstructural Investigation of Biaxial Bauschinger Effects in Sheet Metals
An Experimentally Validated, Microstructure Based Model for Forming of Low-symmetry Alpha-uranium
Biaxial Loading of Anisotropic Al-6022-T4 Sheets Using Cruciform Specimens
Determination of Bending Limit Curves for Aluminium Alloy AA6014-T4: An Experimental Approach
Dilational Response of Voided Polycrystals
Effect of Complex Strain Paths on Microstructure Evolution Studied by In-situ Neutron Diffraction
Evalution of Formability in Aluminum Alloys across Strain Rates Using Digital Image Correlation Technique
Hardening Behavior of 316L SS Subject to Biaxial Strain Path Change: Multiscale Modeling for Guiding Experiments
Inflation of Stainless Steel 304L Microtubes under Axial Tension and Internal Pressure to Assess the Plastic Anisotropy
Modeling Anisotropic Hardening and Nonlinear Elasticity under Loading Path Change
Multi-scale Analysis of Springback in Microforming of Thin Nickel Sheets
On the Non-proportional Deformation of Sheet Steel Using In-situ Diffraction and Modelling Methods
Onset of Plasticity via Relaxation Analysis (OPRA)
Optimization of Biaxial Tensile Test Specimen Design
Predicting Cyclic Deformation of AA6022-T4 and DP590 Using Polycrystal Plasticity
Sensitivity Analysis of the Bauschinger Behavior on Bending Springback for Prestrained Sheets
The Influence of Deformation Mechanisms on Forming of Commercially Pure Titanium Sheets

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