Abstract
It is well known that fatigue damage accumulates around T-junctions of piping system where two kinds of fluid with different temperatures are mixed. Since there are a large number of T-junction, the simple method for evaluating the fatigue damage derived from this phenomenon is greatly important for both design and maintenance stages. In this paper, some methods evaluating fatigue damage directly from the stress power-spectral-density (PSD) are used for evaluating the damage due to this phenomenon, and the applicability of these method is discussed.
