jats:titleAbstract</jats:title> jats:pWe have performed numerical simulations of the electromagnetic hoop stress, jats:italicσjats:subθ</jats:sub> </jats:italic>, in a REBaCuO disk bulk reinforced by a metal ring during pulsed-field magnetization (PFM) using a solenoid coil, in which the superconducting characteristics of the bulk material were assumed to have realistic jats:italicJ</jats:italic> jats:subc</jats:sub>-jats:italicB</jats:italic>-jats:italicT</jats:italic> ones. The compressive and tensile jats:italicσjats:subθ</jats:sub> </jats:italic> stresses were applied in the bulk during the ascending and descending stages of PFM, respectively. The time and position dependences of the mechanical stresses were estimated. The possibility of mechanical fracture due to these hoop stresses and the effect of the metal ring reinforcement were discussed.</jats:p>