Material Behavior in Wires of 1100 Aluminum Subjected to Transverse Impact

Abstract

Material behavior in wires of 1100 aluminum subject to tensile impact loading is examined. Room temperature behavior is observed over the entire range of the stress-strain relation by observation of strain and deformation angle behind the transverse wave front created by a constant-velocity, transverse impact on a wire. A rate-independent analysis of plastic-wave propagation is used in conjunction with experimental data to derive the dynamic stress-strain relation, which is found to depart significantly from the quasi-static relation. The stress required to produce a given strain is raised by impact loading, and the critical impact velocity is higher than that predicted from the quasi-static relation. The uniform elongation at failure does not appear to be affected. Results are reasonably consistent with the data reported from several other types of high loading rate experiments.