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Memorias de investigación
Communications at congresses:
Jones-Wilkins-Lee Parameters for Civil Explosives
Year:2015
Research Areas
  • Civil engineering
Information
Abstract
The cylinder test allows us to determine the expansion of a copper cylinder by the detonation of an explosive charge inside. This test, originally designed for military explosives, has been adapted for industrial explosives with non-ideal behaviour. From data obtained with this test and known physical relationships, an analytical procedure has been developed to calculate the Jones- Wilkins-Lee (JWL) equation of state parameters for five ammonium nitrate/fuel oil (ANFO) and six emulsion-type explosives. A new radial wall expansion function is proposed considering a non-zero initial velocity with the consequent positive Gurney energy at unit relative volume. A set of equations is established to determine the JWL parameters, three of them obtained at the CJ point and the other three at different relative volumes. These equations, along with some constraints to ensure a physically sound solution, are solved for the JWL parameters by a non-linear least squares scheme. A 2D Lagrangian axisymmetric FE numerical model is developed for each tested explosive to validate the analytical results, in terms of expansion histories, with good agreement. This confirms that the set of conditions, constraints on the parameters and least squares calculation used constitute a robust methodology that fully captures the physics of the detonation products expansion involved in the cylinder test.
International
Si
Congress
11th International Symposium on Rock Fragmentation by Blasting
960
Place
Sydney, Australia
Reviewers
Si
ISBN/ISSN
978-1-925100-32-7
Start Date
24/08/2015
End Date
26/08/2015
From page
1
To page
8
11th International Symposium on Rock Fragmentation by Blasting The Australasian Institute of Mining and Metallurgy Publication Series nº 7/2015
Participants
  • Autor: Ricardo Castedo Ruiz (UPM)
  • Autor: Jose Angel Sanchidrian Blanco (UPM)
  • Autor: Lina Maria Lopez Sanchez (UPM)
  • Autor: Pablo Segarra Catasus (UPM)
  • Autor: Anastasio Pedro Santos Yanguas (UPM)
Research Group, Departaments and Institutes related
  • Creador: Grupo de Investigación: Ingeniería de Georrecursos y Modelización
  • Departamento: Ingeniería Geológica y Minera
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