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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 Numerical Integration of Isotropic and Anisotropic Plasticity Models
Author(s) William Scherzinger, Brian Lester, Jakob Ostien
On-Site Speaker (Planned) William Scherzinger
Abstract Scope Recent work on the integration of plasticity models using a line search algorithm has enabled many high-fidelity models to be reliably implemented in production computing codes. A Newton algorithm augmented with a line search method provides a reliable and robust technique for integrating plasticity models using a closest point projection algorithm. This work explores the performance of the algorithm with specific application to a modular modeling framework developed at Sandia National Laboratories that allows for an assortment of yield surfaces and hardening laws with rate and temperature dependence. The return mapping algorithm is examined in detail, with examples highlighting various features of the line search algorithm. Importantly, special attention is paid to the enabling features of the proposed scheme and its improvements versus traditional approaches. The anisotropic plasticity models of Barlat and co-workers are used to investigate the line search methods and results are presented that show significant improvement in the convergence of the return mapping algorithms for both isotropic and anisotropic behavior. Larger boundary value problems are also employed which show the effectiveness, and necessity, of the line search algorithm in attaining results when implemented in a solid mechanics finite element code. Sandia National Laboratories is a multimission laboratory managed and operated by National Technology and Engineering Solutions of Sandia LLC, a wholly owned subsidiary of Honeywell International Inc. for the U.S. Department of Energy’s National Nuclear Security Administration under contract DE-NA0003525.
Proceedings Inclusion? Undecided

OTHER PAPERS PLANNED FOR THIS SYMPOSIUM

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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