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Microstructural Simulation of Mechanical Behaviour of porous CMC matrices by means of a parametric Unit Cell Approach

Richter, Henning and Bartsch, Marion and Schmücker, Martin (2011) Microstructural Simulation of Mechanical Behaviour of porous CMC matrices by means of a parametric Unit Cell Approach. 35th International Conference on Advanced Ceramics & Composites, 24.-28. Jan.2011, Daytona Beach, USA.

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Abstract

Wound highly porous oxide ceramic matrix composites (WHIPOX®), manufactured by German Aerospace Center in Cologne, consist of oxide fibres, embedded in an oxide matrix. WHIPOX® applies the concept of a highly porous matrix to achieve weak fibre-matrix bonding and macroscopic non-brittle, damage tolerant behaviour under mechanical loading. In this class of materials, damage evolution initiates on the microscale in the matrix component, and interacts with damage processes on subsequent length scales in a complex manner. To study the influence of changes in matrix porosity or particle diameter on the microscopic mechanical properties, a unit cell approach has been chosen. Based on comprehensive microstructure analyses, the unit cells are generated parametrically by means of a random sequential addition algorithm that randomly places spherical matrix particles inside a bounding box. This facilitates the numerical simulation of the mechanical behaviour of virtual matrix microstructures under different loading conditions via the finite element method. The simulation results are compared with experimental data. To validate the numerical model, mechanical tests on small specimens of porous matrix material and microscopic investigations have been performed.

Item URL in elib:https://elib.dlr.de/69829/
Document Type:Conference or Workshop Item (Speech)
Title:Microstructural Simulation of Mechanical Behaviour of porous CMC matrices by means of a parametric Unit Cell Approach
Authors:
AuthorsInstitution or Email of AuthorsAuthors ORCID iD
Richter, Henninghenning.richter (at) dlr.deUNSPECIFIED
Bartsch, Marionmarion.bartsch (at) dlr.deUNSPECIFIED
Schmücker, Martinmartin.schmuecker (at) dlr.deUNSPECIFIED
Date:25 January 2011
Open Access:No
Gold Open Access:No
In SCOPUS:No
In ISI Web of Science:No
Status:Published
Keywords:WHIPOX, unit cell, porous media
Event Title:35th International Conference on Advanced Ceramics & Composites
Event Location:Daytona Beach, USA
Event Type:international Conference
Event Dates:24.-28. Jan.2011
Organizer:The American Ceramic Society
HGF - Research field:Aeronautics, Space and Transport
HGF - Program:Aeronautics
HGF - Program Themes:Propulsion Systems (old)
DLR - Research area:Aeronautics
DLR - Program:L ER - Engine Research
DLR - Research theme (Project):L - Virtual Engine and Validation Methods (old)
Location: Köln-Porz
Institutes and Institutions:Institute of Materials Research > Experimental and Numerical Methods
Deposited By: Richter, Henning
Deposited On:27 Oct 2011 13:41
Last Modified:27 Oct 2011 13:41

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