The MIDAS touch for Accurately Predicting the Stress-Strain Behavior of Tantalum

Jorgensen, S.¹ 

[1] Lawrence Livermore National Lab. (LLNL), Livermore, CA (United States)

DOI  :  10.2172/1241949
RP-ID  :  LLNL--TR-684604
PID  :  OSTI ID: 1241949

美国|英语

来源: SciTech Connect

【 摘 要 】

Testing the behavior of metals in extreme environments is not always feasible, so material scientists use models to try and predict the behavior. To achieve accurate results it is necessary to use the appropriate model and material-specific parameters. This research evaluated the performance of six material models available in the MIDAS database [1] to determine at which temperatures and strain-rates they perform best, and to determine to which experimental data their parameters were optimized. Additionally, parameters were optimized for the Johnson-Cook model using experimental data from Lassila et al [2].