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Steel and Composite Structures
  Volume 38, Number 2, January25 2021 , pages 189-211

Thermoelastoplastic response of FGM linearly hardening rotating thick cylindrical pressure vessels
Tayebeh Ebrahimi, Mohammad Zamani Nejad, Hamid Jahankohan and Amin Hadi

    An analytical solution is presented to analyze the thermoelastoplastic response of a rotating thick-walled cylindrical pressure vessel made of functionally graded material (FGM). The analysis is based on Tresca's yield condition, its associated flow rule and linear strain hardening material behaviour. The uncoupled theory of thermoelasticity is used, and the plane strain condition is assumed. The material properties except for Poisson's ratio, are assumed to vary nonlinearly in the radial direction. Elastic, partially plastic, fully plastic, and residual stress states are investigated. The heat conduction equation for the one-dimensional problem in cylindrical coordinates is used to obtain temperature distribution in the vessel. It is assumed that‏ the inner surface is exposed to an airstream and that the outer surface is exposed to a uniform heat flux. Tresca's yield criterion and its associated flow rule are used to formulate six different plastic regions for a linearly hardening‏ condition. All these stages are studied in detail. It is shown that the thermoelastoplastic stress response of a rotating FGM pressure vessel is affected significantly by the nonhomogeneity of the material and temperature gradient. The results are validated with those of other researchers for appropriate values of the system parameters and excellent agreement is observed.
Key Words
    thermoelastoplastic; thick cylinder; pressure vessel; rotating; Functionally Graded Material (FGM); Linearly hardening
Tayebeh Ebrahimi, Mohammad Zamani Nejad and
Hamid Jahankohan: Department of Mechanical Engineering, Yasouj University, Yasouj, Iran
Amin Hadi: Cellular and Molecular Research Center, School of Medicine, Yasuj University of Medical Sciences, Yasuj, Iran

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