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Hierarchic multi scale analysis of porous matrix CMCs

Richter, Henning and Bartsch, Marion and Schmücker, Martin (2012) Hierarchic multi scale analysis of porous matrix CMCs. 15th EUROPEAN CONFERENCE ON COMPOSITE MATERIALS, 24.-28. Juni 2012, Venedig, Italien.

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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. WHIPOX® components are fabricated using an automated process, during which a continuous fibre roving is infiltrated with ceramic slurry and wound on a rotating mandrel. To study the influence of processing-induced changes in the microstructure (matrix porosity and diameter distribution of the sintered matrix particles) on the 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. A cubic grid-based meshing algorithm 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 analytical bounds and predictions obtained by mean field and self-consistent methods.

Item URL in elib:https://elib.dlr.de/78894/
Document Type:Conference or Workshop Item (Speech)
Title:Hierarchic multi scale analysis of porous matrix CMCs
Authors:
AuthorsInstitution or Email of AuthorsAuthors ORCID iD
Richter, Henninghenning.richter (at) dlr.deUNSPECIFIED
Bartsch, Marionmarion.bartsch (at) dlr.deUNSPECIFIED
Schmücker, Martinmartin.schmücker (at) dlr.deUNSPECIFIED
Date:27 June 2012
Open Access:No
In DOAJ:No
In SCOPUS:No
In ISI Web of Science:No
Status:Published
Keywords:CMC, FEM, multiscale, WHIPOX
Event Title:15th EUROPEAN CONFERENCE ON COMPOSITE MATERIALS
Event Location:Venedig, Italien
Event Type:international Conference
Event Dates:24.-28. Juni 2012
Organizer:DEPARTMENT OF MANAGEMENT AND ENGINEERING, UNIVERSITY OF PADOVA
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:26 Nov 2012 14:38
Last Modified:28 Nov 2012 14:03

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