Effect of load path on parameter identification for plasticity models using Bayesian methods

Ehsan Adeli*, Bojana Rosić, Hermann G. Matthies, Sven Reinstädler

*Corresponding author for this work

Research output: Chapter in Book/Report/Conference proceedingChapterAcademicpeer-review

2 Citations (Scopus)

Abstract

To evaluate the cyclic behavior under different loading conditions using the kinematic and isotropic hardening theory of steel, a Chaboche viscoplastic material model is employed. The parameters of a constitutive model are usually identified by minimization of the distance between model response and experimental data. However, measurement errors and differences in the specimens lead to deviations in the determined parameters. In this article the Chaboche model is used and a stochastic simulation technique is applied to generate artificial data which exhibit the same stochastic behavior as experimental data. Then the model parameters are identified by applying an estimation using Bayes’s theorem. The Gauss–Markov–Kalman filter using functional approximation is introduced and employed to estimate the model parameters in the Bayesian setting. Identified parameters are compared with the true parameters in the simulation, and the efficiency of the identification method is discussed. At the end, the effect of the load path on the parameter identification is investigated.

Original languageEnglish
Title of host publicationQuantification of Uncertainty
Subtitle of host publicationImproving Efficiency and Technology
EditorsMarta D'Elia, Max Gunzburger, Gianluigi Rozza
Place of PublicationCham
PublisherSpringer Singapore
Pages1-13
Number of pages13
ISBN (Electronic)978-3-030-48721-8
ISBN (Print)978-3-030-48720-1
DOIs
Publication statusPublished - 1 Jan 2020
Externally publishedYes

Publication series

NameLecture Notes in Computational Science and Engineering
PublisherSpringer
Volume137
ISSN (Print)1439-7358
ISSN (Electronic)2197-7100

Keywords

  • Bayesian methods
  • Chaboche viscoplastic material model
  • Gauss–Markov—Kalman filter
  • Parameter identification
  • Steel hardening theory
  • Stochastic simulation technique

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