Experimental investigation of the scaling laws for metal plates struck by large masses

Abstract An experimental investigation is presented into the geometrically similar scaling laws for circular plates impacted by cylindrical strikers with blunt ends travelling at velocities up to 5 m s−1 which produce large permanent transverse displacements and perforation in some cases. The plate dimensions have a scale range of four for the mild steel (strain rate sensitive) specimens and approximately five for the aluminium alloy (strain rate insensitive) specimens. The experimental results obey the geometrically similar scaling laws within the accuracy expected for such tests. It is observed that the impossibility of geometrically similar scaling of the material strain rate sensitive effects appears not to influence the plate perforation energies, at least within the range of experimental parameters studied in the present investigation.

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