Abstract. The plastic property of AZ31B sheet is poor at room temperature, so taking it as the object. Based on ABAQUS platform, FEM models are established. Moreover, ductile damage value is used as the indication of the crack, and based on the linear interpolation mathematical model, the minimum relative bending radius in each finite element model can be calculated. The effects of sheet thickness on the bending limit of AZ31B magnesium sheet are studied.
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