ABSTRACT
An experimental and numerical study was performed on V-plates made from 2 mm thick DOMEX-700 steel. The blast tested plates were manufactured with either a 32 mm or a 62 mm V-tip radius and with a V-angle of 105° or 120°. The plates were subjected to localised blast loads from cylindrical PE4 charges with a 38 mm diameter and a stand-off distance of 34 mm or 50 mm. The numerical simulations were performed in LS-DYNA®using a Multi-Material Arbitrary Lagrangian-Eulerian blast model. The experiments were modelled in quarter symmetry with the clamp frames and bolts included in the model. The first series of experiments used a non-deformable material model for both the clamp frames and the V-plate. This was done to obtain information about impulse transfer. In the second series of simulations, the clamp frames were modelled with an elastic material model for steel, while a Johnson-Cook material model used for the steel plates. A larger number of V-tip radii were considered for the numerical simulations, which allowed for trends to be determined across the entire range of V-tip radii. The study found that increasing the V-tip radius resulted in an increase in the measured impulse. The simulations correlated closely with the experiments for impulse. Furthermore, the simulations showed that for very large V-tip radii, there is no significant change in the impulse transferred.
