| Autor: |
Whitworth, Nicholas, Dorgan, Robert, Handley, Caroline |
| Zdroj: |
AIP Conference Proceedings; 2024, Vol. 3066 Issue 1, p1-7, 7p |
| Abstrakt: |
CREST is an entropy-dependent reactive burn model for shock initiation and detonation of explosives in hydrocode calculations. This paper describes the development and initial testing of a CREST model for an explosive that comprises 95% by weight TATB and 5% Kel-F 800 and having a nominal density of 1.905 g/cm3. Following other recent CREST models, the equations of state are fitted to available shock Hugoniot, sound speed and overdriven detonation wave data, while the reaction rate coefficients are calibrated using an automatic method to fit sustained-shock gas-gun data and the explosive's detonation size-effect curve. It was found that the optimal reaction rate from the automatic parameterization was unable to predict recent detonation corner turning data used for validation purposes. Subsequent analysis of parameter sets close to the "best" found reaction rates that gave significant improvement to the corner turning data with only slight reductions in the quality of fit to the standard calibration data; one of these was chosen for the reaction rate in the final model. The implications of these findings for the future calibration of reactive burn models for TATB-based explosives will be considered and discussed. [ABSTRACT FROM AUTHOR] |
| Databáze: |
Complementary Index |
| Externí odkaz: |
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