ON THE DETERMINATION OF THE JWL EQUATION OF STATE PARAMETERS FOR HIGH-EXPLOSIVE DETONATION PRODUCTS

Authors
  1. Ijsselstein, R.R.
Corporate Authors
Defence Research Establishment Suffield, Ralston ALTA (CAN)
Abstract
In order to simplify the tedious procedure for determination of the parameters of the JWL equation of state for high explosive detonation products, a simple model has been developed that can simulate the cylinder expansion test. Results for Composition B and nitromethane explosives show that this model approaches the accuracy of the larger hydrocodes. It can thus replace hydrocodes in the determination of the JWL parameters. Two numerical methods for obtaining a good fit to the experimental results are presented. In the first one, the model developed is simply inserted as a function routine in a fitting program. In the second one, pressure-volume data generated from the experimental radius-time data, are fitted to the expression for the JWL equation of state. The first method gives good results provided one of the parameters is held constant. The second-method results in a more stable fitting procedure, but must be improved somewhat to attain the same accuracy. TRUNCATED
Report Number
M-1137 —
Date of publication
15 Jan 1986
Number of Pages
48
DSTKIM No
86-00526
CANDIS No
106147
Format(s):
Hardcopy;Originator's fiche received by DSIS

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