Методика определения коэффициентов уравнения скорости роста трещины при циклическом нагружении

No general procedure for determination of Paris coefficients is available nowadays. An approach providing determination of the intermediate values of the crack growth rates on da/dN - dK fatigue fracture curve in each test is developed. The effect of the crack closure on the crack growth rate is demonstrated and the apmlitute of the effective stress intensity factor (SIF) is obtained. Prospects of developing the proposed procedure are discussed, for example, to determine the region of stable crack growth on da/dN - dK curve leading to the fracture.