Author/Authors :
Ghasemi, H. Department of Mechanical Engineering - Foolad Institute of Technology - Fooladshahr, Isfahan, 84916-63763, Iran , Masoudi Nejad, R. Department of Mechanical Engineering - Foolad Institute of Technology - Fooladshahr, Isfahan, 84916-63763, Iran , Jalayerian Darbandi, A. Department of Mechanical Engineering - Faculty of Engineering - Ferdowsi University of Mashhad, Mashhad, Iran , Tadi Beni, Y. Faculty of Engineering - Shahrekord University, Shahrekord, Iran , Shariati, M. Department of Mechanical Engineering - Faculty of Engineering - Ferdowsi University of Mashhad, Mashhad, Iran
Abstract :
In this paper, the growth of semi-elliptical crack in the walls of thick-walled
cylindrical pressure vessels was investigated. The signicance of the crack growth in
cylindrical pressure vessels provides numerical and experimental 3D models for the growth
of fatigue crack and estimates the fatigue life of pressure vessels. Because of available
geometric and physical parameters, the fatigue life of these pressure vessels can be predicted
more precisely than the existing standard tests, i.e., experimental and numerical. The
most common specimen of thick-walled tanks, steel, was analyzed to conduct experimental
tests. The mechanical properties and fatigue behavior of A516 steel were determined
experimentally. For estimating the crack growth and calculating the fatigue life, the
boundary element method and linear fracture mechanics equations were used. Finally, the
experimental results of fatigue crack growth were compared with the numerical method,
which yielded acceptable results. The overall results showed good agreement between the
experimental data and numerical results.
Keywords :
Fatigue crack growth , Pressure vessel , Fatigue life , Fracture mechanics , Boundary element
