A new approach for determination of material constants of internal state variable based plasticity models and their uncertainty quantification

► A new physics-guided numerical fitting approach is proposed. ► The material constants of BCJ plasticity model for AL7075-T651 are determined. ► The uncertainty of BCJ plasticity model is quantified. ► Belief structures for material constants of BCJ plasticity model are constructed. ► The uncertainty is propagated through Taylor impact simulation.