Characterization of 2024-T351 Aluminum for Dynamic Loading Applications

Abstract

deformation and failure of 2024-T351 plate stock is studied under a wide range of loading conditions. Uniaxial tension and compression, and pure shear tests have been conducted over a wide range of strain rates and temperatures. The results show no significant strain rate effect on plastic deformation up to strain rates of about 5000 s -1 . Specimen surface finish has a significant effect on strain to failure in tension tests. Specimens with rough surface finish failed at smaller strains than specimens with a smooth finish. Equivalent stress strain curves generated from tension, compression and shear tests do not coincide, which indicate that plasticity models (time independent and time dependent) based on J-2 flow theory will not be suitable for modeling the plastic deformation of the material. Results from testing specimens, machined in different orientations relative to the plate rolling direction, in tension and compression tests show that the plates have anisotropic properties with regard to plasticity and failure. The anisotropic nature of the plate is most apparent in the compression tests where initially round cylindrical specimens are deformed into an elliptical cross section. These data can be used for developing plasticity models that are used for simulations of impact events.