Constitutive model for uniaxial time-dependent ratcheting of 6061-T6 aluminum alloy

► A new unified visco-plastic constitutive model is proposed. ► The model predicts the uniaxial time-dependent ratcheting of 6061Al-T6 well. ► The cyclic softening is described by a nonlinear isotropic hardening rule. ► Time-dependent ratcheting at room temperature and 150 °C is considered.