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Semi-analytical solution of time-dependent thermomechanical creep behavior of FGM hollow spheres

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Abstract

By using a method of successive elastic solution, the time-dependent creep behavior of a functionally graded hollow sphere under thermomechanical loads has been investigated. Based on volume percentage, the mechanical and thermal properties of material, except for the Poisson’s ratio, are assumed to be radially dependent. Total strains are assumed to be the sum of elastic, thermal and creep strains. Creep strains are temperature-, stress- and time-dependent. Using the Prandtl–Reuss relations and Sherby’s law, histories of stresses and strains are presented from their initial elastic values at zero time up to 30 years after loading. The results show that the creep stresses and strains change with time and material inhomogeneity has influence on thermomechanical creep behavior. The aim of this work was to understand the effect of creep behavior on a functionally graded hollow sphere subjected to thermomechanical load.

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Authors and Affiliations

  1. Department of Mechanical Engineering, Najafabad Branch, Islamic Azad University, Najafabad, Iran

    J. Jafari Fesharaki & M. Yazdipoor

  2. Department of Mechanical Engineering, Faculty of Engineering, University of Kashan, Kashan, Iran

    A. Loghman & S. Golabi

Authors
  1. J. Jafari Fesharaki
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  2. A. Loghman
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  3. M. Yazdipoor
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  4. S. Golabi
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Correspondence to J. Jafari Fesharaki.

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Jafari Fesharaki, J., Loghman, A., Yazdipoor, M. et al. Semi-analytical solution of time-dependent thermomechanical creep behavior of FGM hollow spheres. Mech Time-Depend Mater 18, 41–53 (2014). https://doi.org/10.1007/s11043-013-9212-6

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  • DOI: https://doi.org/10.1007/s11043-013-9212-6

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