|About this Abstract
||2018 TMS Annual Meeting & Exhibition
||Advanced Characterization Techniques for Quantifying and Modeling Deformation
||Toward Development of an Optimum Biaxial Tensile Test Specimen Design
||Dilip Kumar Banerjee, Mark Iadicola, Adam Creuziger, Evan Rust
|On-Site Speaker (Planned)
||Dilip Kumar Banerjee
Traditional uniaxial tensile test data are not easily applicable in the multidirectional forming processes involving nonlinear strain paths as sheet metals have highly anisotropic properties. Biaxial tensile tests are commonly used to develop mechanical properties of sheet metals. However, there are challenges in developing an optimum test specimen design. Current approach for optimum biaxial specimen design combines optimization software with a verified finite element analysis (FEA) model. The FEA model is verified against measured time-dependent displacement and strain fields obtained with biaxial tensile tests on an initial specimen design. Constitutive material property data for these steel specimens are developed through uniaxial tests conducted at various strain rates.
The optimization approach uses several numerical techniques and objective functions along with proper design variables and constraints. Finally, measured strain and displacement data in the gauge section of optimized specimens are compared with the optimal FEA model predictions for validating the overall methodology.
||Planned: Supplemental Proceedings volume