| Article ID | Journal | Published Year | Pages | File Type |
|---|---|---|---|---|
| 770659 | Engineering Fracture Mechanics | 2013 | 16 Pages |
The paper provides an advanced creep model which gives reasonable descriptions of the effects of damage and stress state from micromechanics viewpoint. A modified creep ductility exhaustion approach is employed to calculate the creep damage. Based on the proposed creep-damage model, numerical analyses of creep crack growth are conducted with a failure simulation technique. The simulated results are compared favorably with available experimental data for compact tension and thumbnail crack specimens for 316 stainless steel tested at 600 °C. The comparisons show the excellent capability of the proposed model in predicting the crack growth rate and progressive crack profiles.
► A creep model reasonably describing effects of damage and stress state is proposed. ► A modified creep ductility exhaustion approach is employed to calculate the damage. ► User subroutines to ABAQUS based on the proposed method are developed. ► FE results of load line displacement, crack length and growth rate are validated. ► For thumbnail cracks, crack profiles and propagation times are precisely predicted.
