Investigating stress redistribution in a pressurized thick-walled tube under high temperature using FEM

The extensive use of pressurized Cr-Mo steel pipes at high temperatures in today s industries reminds us of the importance of studying the phenomenon of creep. In this paper, the secondary creep behavior of pressurized 2.25Cr-1Mo thick-walled pipe under high temperatures is investigated. For this purpose, Norton Power Law constitutive equation which is extended for secondary creep behavior has been used. Also, the investigation of radial, hoop and effective stresses has been calculated and the distribution of hoop and effective stress along the length of the wall and during different periods of time has been investigated. Finally, the study of the skeletal point has been investigated by stress redistribution. Results have shown that the effective stress redistribution reveals the skeletal point at 9 mm of inner wall.

کلیدواژه ها:

Cr-Mo steel pipe ، creep behavior ، stress redistribution ، skeletal point