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Energetic characteristics of chemical explosives and their resulting fragmentation
Abstract

Energetic characteristics of chemical explosives and their resulting fragmentation

S Gharehdash and M. Barzegar
EUROCK 2024: New Challenges in Rock Mechanics and Rock Engineering
EUROCK 2024 (Alicante, Spain, 15/07/2024–19/07/2024)
20/08/2024

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Abstract

Simplified analytical evaluations of chemical explosives such as TNT, ANFO, PETN, and emulsion reveal notable distinctions when compared to cylinder expansion experiments and equation of state (EOS) data. The reliability of simplified analytical methodologies in determining the reaction zone of these explosives is questionable. In contrast, employing computational methods has become commonplace to achieve a more precise description of detonation products. This paper aims to delve into the behavior of chemical explosives through the application of combined Eulerian-Lagrangian smoothed particle hydrodynamics (ELSPH). The objective is to derive parameter sets for these explosives aligned with the JWL (Jones-Wilkins-Lee) equation of state (EOS). This approach not only provides a pathway to characterize explosives used in rock blasting but also proves valuable in compensating for the inherent limitations in experimental measurements. It accommodates variations in explosive properties across different industrial batches of detonation products, acknowledging the challenges posed by restricted accuracy in experimental measurements.

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