Maximum relative entropy-based probabilistic inference in fatigue crack damage prognostics

Xuefei Guan, Adom Giffin, Ratneshwar Jha, Yongming Liu

Research output: Contribution to journalArticle

29 Scopus citations

Abstract

A general probabilistic inference procedure is proposed in this paper based on the Maximum relative Entropy (MrE) approach which generalizes both Bayesian and Maximum Entropy (MaxEnt) inference methodologies. The construction of the conditional probability (likelihood function) for general model-based inference problems is discussed in detail to systematically manage uncertainties from mechanism modeling, model parameters, and measurements. Analytical and numerical examples are used to investigate the sequence effect in the probabilistic inference using point observations and moment constraints. The developed methodology is applied to the engineering fatigue crack growth problem with experimental data for demonstration and validation. Following this, a detailed comparison between the classical Bayesian inference and the MrE inference is given.

Original languageEnglish (US)
Pages (from-to)157-166
Number of pages10
JournalProbabilistic Engineering Mechanics
Volume29
DOIs
StatePublished - Jul 1 2012
Externally publishedYes

Keywords

  • Bayesian updating
  • Fatigue crack propagation
  • Maximum relative entropy
  • Probabilistic inference
  • Uncertainty

ASJC Scopus subject areas

  • Statistical and Nonlinear Physics
  • Civil and Structural Engineering
  • Nuclear Energy and Engineering
  • Condensed Matter Physics
  • Aerospace Engineering
  • Ocean Engineering
  • Mechanical Engineering

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