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Bayesian analysis for determination and uncertainty assessment of strength and crack growth parameters of brittle materials

Fotso Simo, Narcise and Wieler, Matthias and Felten, Frank and Reh, Stefan (2016) Bayesian analysis for determination and uncertainty assessment of strength and crack growth parameters of brittle materials. Journal of the European Ceramic Society. Elsevier. DOI: 10.1016/j.jeurceramsoc.2016.11.004 ISSN 0955-2219

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Official URL: http://dx.doi.org/10.1016/j.jeurceramsoc.2016.11.004

Abstract

To determine the strength and the crack growth parameters of brittle materials, the common approach is to first evaluate the strength and then the crack growth parameters. When the parameters are needed for different temperatures, the procedure is repeated for each temperature of interest. Since the number of test specimens is generally small, the separated analysis of strength and crack growth parameters for each tested temperature leads to large parameters uncertainty. In order to improve the accuracy of the parameters, we propose a Bayesian method that allows to combine all strength and lifetime data obtained at different temperatures and determine the distribution of all material parameters in a single analysis. The results obtained from the analysis of measured skutterudite data show that in comparison to the standard approach the presented method significantly reduces the material parameters uncertainty and therefore is well adapted for a reduced number of samples.

Item URL in elib:https://elib.dlr.de/108236/
Document Type:Article
Title:Bayesian analysis for determination and uncertainty assessment of strength and crack growth parameters of brittle materials
Authors:
AuthorsInstitution or Email of AuthorsAuthors ORCID iD
Fotso Simo, NarciseNarcisse.FotsoSimo (at) de.bosch.comUNSPECIFIED
Wieler, MatthiasMatthias.Wieler (at) de.bosch.comUNSPECIFIED
Felten, Frankfrank.felten (at) de.bosch.comUNSPECIFIED
Reh, StefanStefan.Reh (at) dlr.deUNSPECIFIED
Date:December 2016
Journal or Publication Title:Journal of the European Ceramic Society
Refereed publication:Yes
Open Access:Yes
Gold Open Access:No
In SCOPUS:Yes
In ISI Web of Science:Yes
DOI :10.1016/j.jeurceramsoc.2016.11.004
Publisher:Elsevier
ISSN:0955-2219
Status:Published
Keywords:Bayesian analysis Crack growth Fatigue Strength Weibull analysis
HGF - Research field:Energy
HGF - Program:Energy Efficiency, Materials and Resources
HGF - Program Themes:Methods and Concepts for Materials Development
DLR - Research area:Energy
DLR - Program:E VG - Combustion and Gas Turbine Technologies
DLR - Research theme (Project):E - Materials for Energy Technologies (old), L - Virtual Engine and Validation methods
Location: Köln-Porz
Institutes and Institutions:Institute of Materials Research
Deposited By: Reh, Stefan
Deposited On:01 Jun 2017 07:46
Last Modified:31 Jul 2019 20:05

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