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3-D stochastic finite elements for thermal creep analysis of piping structures with spatial material inhomogeneities

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Abstract

A stochastic finite element-based methodology is developed for creep damage assessment in pipings carrying high-temperature fluids. The material properties are assumed to be spatially randomly inhomogeneous and are modelled as 3-D non-Gaussian fields. A spectral-based approach for random field discretization that preserves exactly the non-Gaussian characteristics is used in developing the stochastic finite element model. The meshing used in random field discretization is distinct from FE meshing, depends on the correlation characteristics of the random fields and is computationally efficient. The methodology enables estimating the failure probability and the most likely regions of failure in a section of a circular pipe.

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Authors and Affiliations

  1. Department of Applied Mechanics, Indian Institute of Technology Madras, Chennai, 600036, India

    Y. Appalanaidu & Sayan Gupta

  2. Department of Civil Engineering, Technical University of Delft, Stevinweg 1, PO Box 5048, 2600 GA, Delft, The Netherlands

    Anindya Roy

Authors
  1. Y. Appalanaidu
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  2. Anindya Roy
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  3. Sayan Gupta
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Correspondence to Sayan Gupta.

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Appalanaidu, Y., Roy, A. & Gupta, S. 3-D stochastic finite elements for thermal creep analysis of piping structures with spatial material inhomogeneities. Acta Mech 228, 3039–3062 (2017). https://doi.org/10.1007/s00707-017-1865-9

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  • DOI: https://doi.org/10.1007/s00707-017-1865-9

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