کد مقاله | کد نشریه | سال انتشار | مقاله انگلیسی | نسخه تمام متن |
---|---|---|---|---|
771133 | 897606 | 2011 | 12 صفحه PDF | دانلود رایگان |
![عکس صفحه اول مقاله: A general model to estimate life in notches and fretting fatigue A general model to estimate life in notches and fretting fatigue](/preview/png/771133.png)
Fatigue in notched specimens and fretting fatigue are two different phenomena but they have in common the existence of a stress gradient. In these cases fatigue life estimation is usually considered as a superposition of an initiation and propagation phase. One of the main problems to estimate the fatigue life is to define the crack length where one phase finishes and the other begins. The model employed in this paper combines both phases without defining a priori the separation between them. The proposed model is applied to uniaxial and multiaxial fatigue in specimens with stress gradient: a group of fretting fatigue tests with spherical and cylindrical contact and another group of tests with notched specimens. The comparison between life estimations and experimental results allows checking the validity of the model in different conditions.
Journal: Engineering Fracture Mechanics - Volume 78, Issue 8, May 2011, Pages 1590–1601