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Finite element simulation of hot plain strain compression test of austenitic steell

Aksenov S., Kliber J., Fabík R.

Zeszyty Naukowe. Mechanika / Politechnika Opolska

2007

Vol. 321, z. 89

81-81

The paper dials with the results of plain strain compression test of austenitic steel on GLEEBLE test machine. In order to obtain true strain-stress curves the results was corrected in accordance with experiment conditions. For normal constant strain rate the local strain rate in the slip line field varies for different initial specimen geometries. Therefore, the understanding of real stress-strain dependence needs to take such effects into account. Moreover, the variations in strain and strain rate within the test-piece cleary have a significant influence on the evolution of microstructure. To analyze the local strain rate distribution futures and its influence on flow stress level, the finite element simulation of the process was made. The association of strain and strain rate characteristics within the test-piece with the results of metallographic analysis is also presented in this study.

Parametrization of Molecular-Based Equations of State: The PC-SAFT, soft-SAFT, PHSC and PSCT Models

Castro-Marcano F., Colina C., Olivera-Fuentes C.

Polish Journal of Chemistry

2006

Vol. 80, nr 1

37-49

We examine the parametrization of four molecular-based equations of state (MBEOS): PC-SAFT, soft-SAFT, PHSC and PSCT. In each case, scaled critical and saturation properties are calculated and related to critical temperature Tc, critical pressure Pc and acentric factor omega through equivalent polynomial expressions. A parametrization strategy matching experimental data of Tc, Pc and omega gives good fits of saturation pressures, but deviations in saturated liquid densities reflect the limitations of each MBEOS in representing the critical region. Nevertheless, the method presented provides a simple way to determine the MBEOS parameters for a wide variety of fluids and can be extended to other models.