“…As revealed in the previous study, the asymmetry of the sheared billet loaded in the die cavity causes its wobble motion accompanying the rigid-body-like movement at the early stroke, possibly leading to considerable oscillation of its mass center. It may also cause a local increase in effective stress at the CDC region [ 37 ] near the final stroke due to the asymmetric metal flow. As the stroke increases, the wobble motion's amplitude and the material's degree of asymmetry decrease.…”