On the inconsistency of the asymmetric-sandwich gurney formula when used to model thin plate propulsion
✍ Scribed by Eitan Hirsch
- Book ID
- 105355973
- Publisher
- John Wiley and Sons
- Year
- 1995
- Tongue
- English
- Weight
- 333 KB
- Volume
- 20
- Category
- Article
- ISSN
- 0721-3115
No coin nor oath required. For personal study only.
✦ Synopsis
Abstract
The asymmetric sandwich Gurney formula is used extensively worldwide during explosive reactive armor and shaped‐charge war‐head design, in either its original form^(1,2)^ or its extended form used to model implosion configurations^(3–5)^. It is therefore very important to realize that calculations may contradict physical observations when the formula is used to calculate the velocity of thin plates having mass which is smaller than half the explosive mass per unit area. This inconsistency between calculation and experimental results is explained as resulting from the failure of the assumption made in deriving all the Gurney formulas that the velocity distribution of the explosive products is a linear function of the expansion coordinate.