کد مقاله | کد نشریه | سال انتشار | مقاله انگلیسی | نسخه تمام متن |
---|---|---|---|---|
781694 | 1463849 | 2007 | 7 صفحه PDF | دانلود رایگان |
![عکس صفحه اول مقاله: On the study of the effects of notch shape on the creep damage under cyclic loading On the study of the effects of notch shape on the creep damage under cyclic loading](/preview/png/781694.png)
Numerical calculations with the K-R damage law have been performed to study the creep damage development of different notch specimens (Circumferential, U-type and V-type notch) under cyclic loading. Emphasis was placed on the roles of notch geometry, multi-axial stress rupture parameter α, frequency and stress ratio. Notch shape has a notable influence on the creep damage and fatigue life. Different notch specimens have different creep damage distributions. The development of creep damage in the minimum cross-section varies with notch shape and notch radius. For the Circumferential notch specimen, the maximum creep damage lies at the point in from notch tip; For the U-type and V-type notch specimens, the maximum creep damage always happens at the notch tip. Creep damage is greatly affected by the amplitude of load, stress ratio, multi-axial stress rupture parameter α. Larger mean stress, stress ratio and material parameter α cause faster development of the creep damage.
Journal: International Journal of Fatigue - Volume 29, Issue 5, May 2007, Pages 836–842