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Effect of geometrical imperfection on the thermomechanical behavior of functionally graded material rotating disk

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Abstract

The thermoelastic analysis of axisymmetric bending of rotating functionally graded material (FGM) disks, with and without imperfection, is presented. Material properties are assumed to be temperature dependent and graded in the thickness direction following a grading index power-law distribution. Theories of von Karman and first-order shear deformation were implemented to calculate the stress and displacement fields. Numerical results are given for evaluating the effects of temperature, material properties and imperfection on displacement and stress fields in a disk with roller-supported boundary conditions. Small and large deflection theories are considered to obtain the stress field and displacement field for the perfect and imperfect in FG disks and also in full metal (or full ceramic) disks. A series-form solution is used to solve the large-deflection nonlinear equations. The results are compared and validated with the results from the finite element method. It is observed that applying the initial geometric imperfection to a rotating solid disk would increase the value of radial stress, circumferential stress and vertical displacement.

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Acknowledgements

The research in this paper was financially supported by Malayer University, Malayer, Iran.

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Authors and Affiliations

  1. Mechanical and Aerospace Engineering Department, University of Alabama in Huntsville, Huntsville, AL, 35899, USA

    Behzad Bahrami Babamiri

  2. Department of Mechanical Engineering, Malayer University, Malayer, Iran

    Ali Shahrjerdi

  3. Department of Civil Engineering, Aalborg University, Aalborg, Denmark

    Mehdi Bayat

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  1. Behzad Bahrami Babamiri
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  2. Ali Shahrjerdi
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  3. Mehdi Bayat
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Correspondence to Ali Shahrjerdi.

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Technical Editor: Pedro Manuel Calas Lopes Pacheco, D.Sc.

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Bahrami Babamiri, B., Shahrjerdi, A. & Bayat, M. Effect of geometrical imperfection on the thermomechanical behavior of functionally graded material rotating disk. J Braz. Soc. Mech. Sci. Eng. 42, 271 (2020). https://doi.org/10.1007/s40430-020-02360-z

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  • DOI: https://doi.org/10.1007/s40430-020-02360-z

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