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Microscale-Motivated Continuum Damage Simulations of Brittle Ceramics under Thermomechanical Loading
J. Gundlach, D. Henneberg, J. Scheel, A. Ricoeur
University of Kassel, Institute of Mechanics, Chair of Engineering Mechanics/Continuum Mechanics, Mönchebergstraße 7, D-34119 Kassel, Germany
received February 1, 2016, received in revised form March 20, 2016, accepted May 2, 2016
Vol. 7, No. 2, Pages 145-154 DOI: 10.4416/JCST2016-00012
Abstract
Two approaches towards modeling damage in a brittle material caused by thermomechanical loading are presented. Both rely on microcrack growth, in the first case in a homogeneous matrix, in the second one at grain boundaries. Two-scale simulations e.g. of thermal shocks applied to single-phase or layered structures are performed in connection with the finite element method. Damage and crack patterns are predicted just as quantities like residual strength or critical temperature jumps.
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Keywords
Thermal shock, damage simulations, multiscale models, effective material properties
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