کد مقاله | کد نشریه | سال انتشار | مقاله انگلیسی | نسخه تمام متن |
---|---|---|---|---|
770659 | 1463127 | 2013 | 16 صفحه PDF | دانلود رایگان |
![عکس صفحه اول مقاله: Simulations of creep crack growth in 316 stainless steel using a novel creep-damage model Simulations of creep crack growth in 316 stainless steel using a novel creep-damage model](/preview/png/770659.png)
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.
Journal: Engineering Fracture Mechanics - Volume 98, January 2013, Pages 169–184