Metal structure brittle failure prevention design method

The invention provides a metal structure brittle failure prevention design method which comprises the steps that S1, a stress field characteristic value # imgabs0 # of a weak position existing in a metal structure is calculated, and the weak position in the metal structure is a stress concentration point caused by geometric discontinuity of the shape; and S2, material selection design is conducted according to the stress field characteristic value # imgabs1 # of the weak position existing in the metal structure, and the ratio of the breaking strength # imgabs2 # to the yield strength # imgabs3 # of the material is larger than the stress field characteristic value # imgabs4 # of the maximum weak position existing in the metal structure. According to the anti-brittle failure design method for the metal structure, structure designers can be guided to carry out safety design on the metal structure so as to improve the damage resistance of the structure, calculation is simple, and applicability is high. 本发明提供了一种金属