| Issue |
EPJ Web Conf.
Volume 250, 2021
DYMAT 2021 - 13th International Conference on the Mechanical and Physical Behaviour of Materials under Dynamic Loading
|
|
|---|---|---|
| Article Number | 02012 | |
| Number of page(s) | 6 | |
| Section | Modelling & Numerical Simulation | |
| DOI | https://doi.org/10.1051/epjconf/202125002012 | |
| Published online | 09 September 2021 | |
https://doi.org/10.1051/epjconf/202125002012
A strain-rate dependent engineering approximation of the temperature rise in plastically-deforming DP steel
Chair of Computational Modelling of Materials in Manufacturing, Department of Mechanical and Process Engineering, Swiss Federal Institute of Technology (ETH), Zurich, Switzerland
* Corresponding author: ccroth@ethz.ch
Published online: 9 September 2021
Experiments at ten strain rates ranging from 0.001/s to 4/s are carried out on uniaxial tension specimens extracted from DP800 metal sheets. Digital Image Correlation (DIC) is used to obtain surface strain fields and a high speed infrared (IR) camera is employed to measure the corresponding temperature rise due to plastic dissipation. A temperature rise of 60K is witnessed for the highest loading speed whereas minimal temperature rise (<1K) is seen for the lowest loading speed. To minimize the computational cost by treating the temperature as an internal state variable, (effectively avoiding more complex coupled thermo-mechanical analyses), a logarithm based function is proposed that models the transition from isothermal to adiabatic conditions. The proposed function exhibits a higher accuracy compared to literature formulations.
© The Authors, published by EDP Sciences, 2021
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