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A generalized stochastic perturbation technique for plasticity problems

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Abstract

The main aim of this paper is to present an algorithm and the solution to the nonlinear plasticity problems with random parameters. This methodology is based on the finite element method covering physical and geometrical nonlinearities and, on the other hand, on the generalized nth order stochastic perturbation method. The perturbation approach resulting from the Taylor series expansion with uncertain parameters is provided in two different ways: (i) via the straightforward differentiation of the initial incremental equation and (ii) using the modified response surface method. This methodology is illustrated with the analysis of the elasto-plastic plane truss with random Young’s modulus leading to the determination of the probabilistic moments by the hybrid stochastic symbolic-finite element method computations.

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Authors and Affiliations

  1. Department of Mechanics of Materials, Faculty of Civil Engineering, Architecture and Environmental Engineering, Technical University of Łódź, Al. Politechniki 6, 90-924, Łódź, Poland

    Marcin Marek Kamiński

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  1. Marcin Marek Kamiński
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Correspondence to Marcin Marek Kamiński.

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Kamiński, M.M. A generalized stochastic perturbation technique for plasticity problems. Comput Mech 45, 349–361 (2010). https://doi.org/10.1007/s00466-009-0455-7

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  • DOI: https://doi.org/10.1007/s00466-009-0455-7

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