سال انتشار: ۱۳۸۷

محل انتشار: اولین کنگره ملی صنعت حفاری ایران

تعداد صفحات: ۱۰

نویسنده(ها):

Gholamreza Rashed – Assistant Professor, Faculty of Petroleum Engineering, Petroleum University of Technology
Khalil Shahbazi – Assistant Professor, Faculty of Petroleum Engineering, Petroleum University of Technology

چکیده:

A fatigue damage model is developed. The effects of stress state and mean stress are considered in the new model. The model does not require a cycle counting method. The model is evaluated by using the multiaxial fatigue data. The results indicate that the model can satisfactorily correlate the experimental results for a wide range of materials and loading conditions. Moreover, the developed criterion can be used to predict the drillpipe life