سال انتشار: ۱۳۹۱

محل انتشار: بیستمین کنفرانس سالانه مهندسی مکانیک

تعداد صفحات: ۴

نویسنده(ها):

Masoud Mohammad Pour – Postgraduate student, Urmia University; Mechanical Engineering Department
Samrand Rash Ahmadi – Assistant professor, Urmia University; Mechanical Engineering Department
Soran Hassanifard – Assistant professor, University of Tabriz; Faculty of Mechanical Engineering

چکیده:

In this study, the fatigue life duration of single friction stir spot welded joints under tensile-shear cyclic loading is investigated by employing volumetric method. Experimental fatigue tests of friction stir spot welded specimens have been carried out using constant amplitude load control servo-hydraulic fatigue testing machine. A three dimensional finite element model of single joint has simulated in ANSYS software. Nonlinearmaterial properties and gap effects were considered to obtain the crucial parameters of volumetric approach, such as relative stress gradients,effective distances and notch strength reduction factors. Our experimental results display that volumetric approach has a good agreement with real fatigue lives of the specimens. So employing this method to predict the fatigue lives of a single friction stir spot welded joints is acceptable.