Abstract

A new specimen geometry, based on ASTM B831, for characterization of sheet metals in shear is introduced. The specimen can be tested in both quasi-static and dynamic tests using a load frame and a tensile split-Hopkinson bar (SHB) apparatus, respectively. Specimens with this new geometry and spool-shaped torsion specimens were fabricated from the same 0.5″ rolled 2024-T351 aluminum plate. Static and dynamic tests at strain rates up to 2,000 1/s on both samples were conducted using an axial-torsional servo-hydraulic load frame, a tension SHB, and a torsion SHB. Three-dimensional digital image correlation was used to directly measure deformation of the surface of the sample’s gage section in both static and dynamic tests. Stress–strain curves obtained from tests with both types of specimens agree, indicating that the new sample geometry is suitable for the characterization of ductile sheet metals in shear.

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