对于结构、受力及裂纹形态比较复杂的板带轧机轧辊,采用基于应力强度因子的判据是判断断裂的有效方法。为了克服轧辊裂纹应力强度因子计算的难题,提出了应力强度因子的间接计算方法。该方法结合了断裂力学的有关理论和有限元方法,可以灵活有效的进行各种载荷与裂纹形态的应力强度因子计算。通过对不同深度裂纹的应力强度因子计算,证明提出的方法有效。 For the strip mill roll with complicated structure, force and crack shape, the criterion based on the stress intensity factor is an effective method to judge the fracture. In order to overcome the problem of calculating the stress intensity factor of the roll crack, an indirect calculation method of stress intensity factor is proposed. The method combines the theories and finite element methods of fracture mechanics, and can flexibly and effectively calculate the stress intensity factors of various loads and crack morphologies. By calculating the stress intensity factor of different depth cracks, the proposed method is proved to be effective.