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Meeting NUMIFORM 2019: The 13th International Conference on Numerical Methods in Industrial Forming Processes
Symposium S-01: Modeling of the Anisotropic Behavior in Plasticity
Presentation Title Plastic Anisotropy from Single Crystal to Multi-phase Steels
Author(s) Junhe Lian, Wenqi Liu, Sebastian Muenstermann
On-Site Speaker (Planned) Junhe Lian
Abstract Scope The plastic anisotropy of metallic materials originates from the directional nature of the deformation mechanism and the crystallographic orientation distribution of the grains. With the increasing of the complication of the microstructure, e.g. from single crystal to multi-phase steels, the anisotropic behaviour becomes an object with multiple variables, which challenges a clear identification of influencing parameters on the microstructural level using analysis data from only one scale. Therefore, in this study, we show a systematic and multiscale study on the anisotropic behaviour from single crystals to a polycrystal single-phase and dual-phase steel using both experimental and numerical methods. For single crystals, nanoindentation tests are performed to characterise the plastic anisotropy for selective grain orientations, while for the polycrystals, typical tensile tests are used for various deformation directions. An integrated multiscale modelling approach is developed to simulate the anisotropic behaviour of these levels. Within the approach, a fine-resolution construction method of a representative synthetic model allowing consideration of the relevant material features is established with a quantitative evaluation criterion for the representativeness of the virtual microstructure. At the same time, a scheme bridging the equivalent quantities from microstructure to various anisotropic representations of the mechanical behaviour is performed across the single crystal and polycrystals with single or dual-phase configurations. It is demonstrated that with the proposed integrated material modelling approach a uniform solution is found to represent the anisotropy of metallic steels at different levels, which could guide the parameter identification and material design at different scales.
Proceedings Inclusion? Undecided


A Comparative Study between Elasto-plastic Self-consistent Crystal Plasticity and Anisotropic Yield Function with Distortional Hardening Formulations for Sheet Metal Forming
Accurate Modeling of Experimental Strain-hardening Characteristics for Series of High Strength Steel
An Anisotropic Yield Model Reduced From The Yld2004-18p Function For Metals With Gentle Anisotropy Under Triaxial Loading
An Application of Homogeneous Anisotropic Hardening Model to Earing Predictions of Pre-strained Material
An Experimental Study on Yield Surface Evolution of a Trip-assisted Steel
Applications of a Stress Invariants-based Yield Criterion to DP980 & QP980 Steels
Characterization of Anisotropic Yield Criteria Using an Indentation Based Technique for Steel Sheets
Comparison of Strain-path Indicators for Analysis of Processes in Sheet-bulk Metal Forming
Determination of Strain Dependent Anisotropy in Layer Compression Tests and Resulting Influence on the Yield Locus Modelling
Material Modeling and Forming Limit Analysis of 6016-T4 Aluminum Alloy Sheet
Measurement of Unloading Behavior of AHSS and Its Effect on the Springback Prediction in FEM Simulation
Modeling of Sheet Metal Forming Based on Implicit Embedding of the Elasto-plastic Self-consistent Formulation in Finite Elements: Application to Cup Drawing of AA6022-T4
Modeling of the Differential Hardening of Pure Titanium Sheet and Application to Hole Expansion Forming Simulation
Numerical Integration of Isotropic and Anisotropic Plasticity Models
Plastic Anisotropy from Single Crystal to Multi-phase Steels
Prestraining Effect on Failure Behavior in Hole-Expansion Test of AA6022-T4 Sheet
Rate-dependent Tension and Compression Hardening Behaviors of Ahss for Sheet Metal Forming Simulation
Springback Prediction in Roll Forming using Nonlinear Kinematic and Homogeneous Anisotropic Hardening Models
Study on Hot Deformation Behavior and Microstructure of 5CrNiMoV Steel using Constitutive Modeling and Processing Map
Theory and Application Study of Springback Prediction Accuracy for QP Steel with Different Material Hardening Models

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