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Elastic constants of metal/ceramic composites with lamellar microstructures: Finite element modelling and ultrasonic experiments

 
: Ziegler, T.; Neubrand, A.; Roy, S.; Wanner, A.; Piat, R.

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Preprint urn:nbn:de:0011-n-922879 (516 KByte PDF)
MD5 Fingerprint: fd639e9d51cb5d48f67d013a21a8420e
Erstellt am: 9.3.2011


Composites science and technology 69 (2009), Nr.5, S.620-626
ISSN: 0266-3538
Englisch
Zeitschriftenaufsatz, Elektronische Publikation
Fraunhofer IWM ()
metal-matrix composite; mechanical property; finite element analysis; ultrasonic; modelling

Abstract
The elastic properties of single domains of lamellar AlSi12/Al2O3 composites produced by metal infiltration of freeze cast preforms have been examined. The anisotropic elastic constants determined from ultrasonic phase spectroscopy (UPS) experiments have been compared to microstructure based FE-models created with the program OOF2, micromechanical models (Mori-Tanaka and inverse Mori-Tanaka) and an analytical model for an ideal laminate. The influences of lamellae orientations and ceramic contents on the elastic constants have been investigated. Along the lamellae directions the microstructure based FE model and the inverse Mori-Tanaka model are in good agreement with experimental results. Perpendicular to the lamellae the experiment shows a stiffer than expected elastic behaviour.

: http://publica.fraunhofer.de/dokumente/N-92287.html