Abstract
In order to study the kinematic hardening performance of 5052 aluminium alloy, experiments of cyclic compression-tension were conducted in this work. The kinematic hardening performance including the Bauschinger effect, transient hardening and permanent softening shown by the forward-reverse stress-strain curves was discussed. The famous Yoshida-Uemori hardening model was adopted to characterize the kinematic hardening behaviour of AA5052. The parameters in Yoshida-Uemori hardening model were identified with an inverse method composed by experiments, finite element simulation and optimization. Experiments of cyclic loading-unloading uniaxial tension were also performed to identify the degradation of the elastic modulus of AA5052 with the plastic strain. U-bending springback simulation using the Yoshida-Uemori hardening model was conducted. The results showed that the investigated AA5052 has strong Bauschinger effect, transient hardening and permanent softening. The percentage of elastic modulus degradation could reach 16.7% at 8.8% plastic strain. The Yoshida-Uemori hardening model can capture the kinematic hardening behaviour of AA5052 very well.
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