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A constitutive model for orthotropic damage in an all oxide woven ceramic matrix composite material

Jain, Neraj and Hofmann, Severin and Koch, Dietmar and Vladimirov, Ivaylo and Göring, Jürgen (2016) A constitutive model for orthotropic damage in an all oxide woven ceramic matrix composite material. Materials Science and Engineering 2016, 27.-29. Sep. 2016, Darmstadt, Deutschland.

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Abstract

The present work includes a constitutive damage meso-model which is based on the investigations of mechanical properties under room and high temperature of a plain-woven oxide/oxide Ceramic Matrix Composite (CMC) material. The models developed for unidirectional plies have been adapted to a plain-woven ply. The damage is defined as the degradation of the in-plane elastic properties. The thermodynamic potentials and the corresponding scalar damage variables are integrated into the framework of continuum damage mechanics. The damage surface of the model corresponds to the Tsai-Wu failure criterion in the stress space. The most of the variables used to define the damage initiation and propagation have been derived from simple on- and off-axis tension and shear tests. Nevertheless, curve fitting is required to obtain a certain set of parameters. The Tsai-Wu failure criterion has been implemented in strain and stress space to predict the failure of the laminate. The material model is then implemented into the commercial finite element software ANSYS Workbench with the help of a user-defined material subroutine written in FORTRAN. The stress-strain relationship for different fibre orientations under room and elevated temperatures is compared with experimental data to assess the accuracy of the model.

Item URL in elib:https://elib.dlr.de/110514/
Document Type:Conference or Workshop Item (Speech)
Title:A constitutive model for orthotropic damage in an all oxide woven ceramic matrix composite material
Authors:
AuthorsInstitution or Email of AuthorsAuthors ORCID iD
Jain, NerajNeraj.Jain (at) dlr.dehttps://orcid.org/0000-0002-7853-1894
Hofmann, SeverinSeverin.Hofmann (at) dlr.deUNSPECIFIED
Koch, DietmarDietmar.Koch (at) dlr.dehttps://orcid.org/0000-0003-4504-8721
Vladimirov, IvayloMTU Aero Engines AGUNSPECIFIED
Göring, JürgenJuergen.Goering (at) dlr.deUNSPECIFIED
Date:29 September 2016
Refereed publication:Yes
Open Access:No
Gold Open Access:No
In SCOPUS:No
In ISI Web of Science:No
Status:Published
Keywords:woven Ceramic Matrix Composites, continuum damage mechanics, Tsai-Wu failure criterion, progressive damage, degradation
Event Title:Materials Science and Engineering 2016
Event Location:Darmstadt, Deutschland
Event Type:international Conference
Event Dates:27.-29. Sep. 2016
HGF - Research field:Aeronautics, Space and Transport
HGF - Program:Aeronautics
HGF - Program Themes:propulsion systems
DLR - Research area:Aeronautics
DLR - Program:L ER - Engine Research
DLR - Research theme (Project):L - Turbine Technologies
Location: Stuttgart
Institutes and Institutions:Institute of Structures and Design > Ceramic Composite Structures
Institute of Materials Research > Structural and Functional ceramics
Deposited By: Jain, Neraj
Deposited On:12 Jan 2017 11:51
Last Modified:01 Jun 2017 09:37

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