Master of Science in Mechanical Engineering (MSME)
A non-destructive thermographic technique is adapted and applied to study the fatigue life and behavior of welded specimens made from two different materials. Results show good agreement between experimental predictions of consumed fatigue life and predicted fatigue life. Further, the thermal evolution of the specimens is used to calculate Damage Parameter, which is also used to make fatigue life predictions with promising results. To gain further insight Buckingham Pi theorem is also applied to determine the role of the important parameters involved in a dimensionless form. For this purpose, a series of experiments were performed and used for the analysis of Pi groups. The non-dimensional Pi groups show variation caused by changes in material properties, and loading conditions used in determining temperature evolutions.
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Williams, Paul Thomas, "A thermographic method for remaining fatigue life prediction of welded joints" (2014). LSU Master's Theses. 2189.