The Response of Clamped Circular Plates to Confined Explosive Loadings
2007
Zilliacus, Steve | Phyillaier, Wayne E. | Shorrow, Paul K.
A series of confined explosive tests was carried out for 12-in.- diameter steel and aluminum plates. Each plate in turn formed one end of the closed cylindrical chamber inside which the explosives were detonated. Tests were conducted with the chamber suspended in air and in water to determine pressure histories, deformation shapes, and failure modes in the inelastic range of air- and water-backed plates as well as to determine pressure decay rates resulting from venting to the atmosphere. The final deformation shapes observed were uniform and repeatable, but the pressure records were less uniform. There was a distinct difference between the final shapes of the air- and water-backed plates; those of the former were intermediate between conical and parabolic whereas those of the latter were more parabolic and sometimes dimpled in the center. Failures occurred at the plate edge for charge standoffs greater than one plate diameter and at the plate center for closer standoffs. Measured pressure decays due to venting confirmed an analytical method established for predicting gas venting.
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