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Calculation of effective Young’s modulus distribution from electron backscatter diffraction results for stochastic analyses in aerospace applications

Dresbach, Christian and Dreßler, Ulrike and Gussone, Joachim and Reh, Stefan (2014) Calculation of effective Young’s modulus distribution from electron backscatter diffraction results for stochastic analyses in aerospace applications. Materialwissenschaft und Werkstofftechnik, 45 (5), pp. 361-370. Wiley. DOI: 10.1002/mawe.201400235 ISSN 0933-5137

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Abstract

In reliability analyses of safety-relevant components it is necessary to consider the variations in load, geometry and material properties. The scatter in load, geometry and global material properties is nowadays addressed in some stochastic analyses [1, 2], whereas the scatter in local material properties is not adequately regarded due to difficulties in determining meaningful and stochastically relevant local material properties. In this paper a method for estimating the local distribution of the effective elastic behavior, belonging to a defined component direction, is presented. First, electron backscatter diffraction (EBSD) analyses of relevant cross sections were performed. Second, the effective elastic behavior perpendicular to the cross section was calculated for each scan point from the determined Euler angles. By using direct tensor rotation and generalized Hooke’s law, the method can be applied to all kind of crystal structures if the elastic constants of the single crystal material are known. The experimental procedure, the mathematical background und the numerical realization are described in detail. Two examples of applying the procedure to materials for aerospace components as well as a stochastic finite element simulation considering the determined scatter of the elastic properties are shown.

Item URL in elib:https://elib.dlr.de/84856/
Document Type:Article
Title:Calculation of effective Young’s modulus distribution from electron backscatter diffraction results for stochastic analyses in aerospace applications
Authors:
AuthorsInstitution or Email of AuthorsAuthors ORCID iD
Dresbach, Christianchristian.dresbach (at) dlr.deUNSPECIFIED
Dreßler, Ulrikeulrike.dressler (at) dlr.deUNSPECIFIED
Gussone, Joachimjoachim.gussone (at) dlr.deUNSPECIFIED
Reh, Stefanstefan.reh (at) dlr.deUNSPECIFIED
Date:May 2014
Journal or Publication Title:Materialwissenschaft und Werkstofftechnik
Refereed publication:Yes
Open Access:No
Gold Open Access:No
In SCOPUS:Yes
In ISI Web of Science:Yes
Volume:45
DOI :10.1002/mawe.201400235
Page Range:pp. 361-370
Editors:
EditorsEmail
Oechsner, Andreasandreas.oechsner@gmail.com
Publisher:Wiley
ISSN:0933-5137
Status:Published
Keywords:nickel-based superalloy, titanium matrix composite, EBSD
HGF - Research field:Aeronautics, Space and Transport
HGF - Program:Aeronautics
HGF - Program Themes:fixed-wing aircraft
DLR - Research area:Aeronautics
DLR - Program:L AR - Aircraft Research
DLR - Research theme (Project):L - Structures and Materials, L - Turbine Technologies
Location: Köln-Porz
Institutes and Institutions:Institute of Materials Research > Metallic Structures and Hybrid Material Systems
Deposited By: Dresbach, Dr. Christian
Deposited On:01 Dec 2014 11:06
Last Modified:08 Mar 2018 18:46

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