Determination of the JWL Constants for ANFO and Emulsion Explosives from Cylinder Test Data

• Autorzy: Sanchidrián J. A. , Castedo R. , López L. M. , Segarra P. , Santos A. P.
• Języki publikacji: EN

Abstrakty

EN

The Jones-Wilkins-Lee (JWL) equation of state parameters for ANFO and emulsion-type explosives have been obtained from cylinder test expansion measurements. The calculation method comprises a new radial expansion function, with a non-zero initial velocity at the onset of the expansion in order to comply with a positive Gurney energy at unit relative volume, as the isentropic expansion from the CJ state predicts. The equations reflecting the CJ state conditions and the measured expansion energy were solved for the JWL parameters by a non-linear least squares scheme. The JWL parameters of thirteen ANFO and emulsion type explosives have been determined in this way from their cylinder test expansion data. The results were evaluated through numerical modelling of the tests with the LS-DYNA hydrocode; the expansion histories from the modelling were compared with the measured ones, and excellent agreement was found.

Słowa kluczowe

EN

cylinder test; JWL equation of state; LS-DYNA; ANFO; emulsion explosives

• Czasopismo: Central European Journal of Energetic Materials
• Rocznik: 2015
• Tom: Vol. 12, no. 2
• Strony: 177--194
• Opis fizyczny: Bibliogr. 26 poz., rys., tab.

Twórcy

autor

Sanchidrián J. A.

• Universidad Politécnica de Madrid − E.T.S.I. Minas y Energía, Ríos Rosas 21, 28003 Madrid, Spain

autor

Castedo R.

• Universidad Politécnica de Madrid − E.T.S.I. Minas y Energía, Ríos Rosas 21, 28003 Madrid, Spain

autor

López L. M.

• Universidad Politécnica de Madrid − E.T.S.I. Minas y Energía, Ríos Rosas 21, 28003 Madrid, Spain

autor

Segarra P.

• Universidad Politécnica de Madrid − E.T.S.I. Minas y Energía, Ríos Rosas 21, 28003 Madrid, Spain

autor

Santos A. P.

• Universidad Politécnica de Madrid − E.T.S.I. Minas y Energía, Ríos Rosas 21, 28003 Madrid, Spain

Bibliografia

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