This tutorial provides a step-by-step demonstration for ASME Section VIII Division 2 unwelded smooth bar fatigue analysis using Fatigue+.
A pressure vessel goes through a loading and unloading process. The von Mises equivalent stress in the shell reaches 44.237 ksi when loaded with 640.4oF fluid, and drop to zero when unloaded. The shell of the pressure vessel is made of ASME SA-516 Grade 70. The pressure vessel is designed to ASME Section VIII Division 2 Class 1 vessel.
The shell under evaluation is away from geometrical discontinuities and is away from welded region; therefore the weld surface fatigue strength reduction factor is taken as Kf = 1.0.
Calculate fatigue life of the pressure vessel shell.