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Conference Tools for NUMIFORM 2019: The 13th International Conference on Numerical Methods in Industrial Forming Processes
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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 Rate-dependent Tension and Compression Hardening Behaviors of Ahss for Sheet Metal Forming Simulation
Author(s) Hoon Huh, G. Joo, J. Kwon
On-Site Speaker (Planned) Hoon Huh
Abstract Scope This paper is concerned with evaluation of rate-dependent hardening behaviors of AHSS sheets with novel tension and compression testing devices. Hardening behaviors in tension and compression are indispensable for accurate numerical simulation of sheet metal forming and subsequent spring-back. In addition, it is important to consider the strain rate effect for hardening behaviors in tension and compression because sheet metal deformation prevails at intermediate strain rates up to several hundred’s per second in press shops of automotive industry. Hardening behaviors are evaluated in tension‒compression for TRIP980 and TWIP980 steel sheets at various strain rates ranging from 0.001 s−1 to 100 s−1 in terms of the flow stress considering the Bauschinger effect and the permanent softening. It is confirmed from the experiments that the Bauschinger effect decreases as the strain rate increases. The permanent softening defines the stress offset between flow stress curves in tension‒compression and monotonic tension with large deformation after loading reversal. It is observed that the stress offset is dependent on the inherent characteristics of steel sheets as well as the strain rates.
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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