Affiliations: [a] Department of Mechanical Engineering, The University of Alabama, Tuscaloosa, Al 35487, USA | [b] Department of Mechanical Engineering, Mississippi State University, Mississippi State, MS 39759, USA | [c] Geotechnical & Structures Laboratory, Engineer Research & Development Center, US Army Corps of Engineers, Vicksburg, MS 39180, USA
Correspondence:
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Corresponding author: Department of Mechanical Engineering, The University of Alabama, Box 870276, Tuscaloosa, AL 35487, USA. Tel.: 205-348-2701; Fax: 205-348-6419; E-mail: bjordon@eng.ua.edu.
Abstract: In this study, we characterize the Bauschinger effect by quantifying the isotropic and kinematic hardening in extruded 6061 aluminum alloy. Reverse loading experiments were performed up to a prestrain of 5% in both tension-followed-by-compression and compression-followed-by-tension. The development of isotropic and kinematic hardening and subsequent anisotropy was indicated by the observation of the Bauschinger effect phenomenon. Experimental results show that 6061 aluminum alloy exhibited an increase in the kinematic hardening versus applied prestrain. However, the ratio of kinematic-to-isotropic hardening remained near unity. An internal state variable (ISV) plasticity and damage model was used to capture the evolution of the anisotropy for the as-received T6 and partially annealed conditions.
