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Influence of Interfaces on Crack Propagation through a Layered Refractory Loaded by Thermal Shock
J. Hein, O. El Khatib, M. Kuna
Institute of Mechanics and Fluid Dynamics, TU Bergakademie Freiberg, Lampadiusstrasse 4, D-09599 Freiberg, Germany
received January 10, 2016, received in revised form March 10, 2016, accepted April 15, 2016
Vol. 7, No. 2, Pages 203-208 DOI: 10.4416/JCST2016-00004
Abstract
Layered structures have been suggested to improve the thermal shock resistance of refractories. Owing to the fast temperature increase of the outer surface, high thermal tensile stresses occur inside the refractory. Depending on the intensity of thermal shock and the material, cracks may arise and grow through and between the layers. To study the behavior of such a crack system and the influence of interfaces on it, a symmetrically layered strip is considered. The cracks through the layers and along the interfaces are modeled using cohesive zones. Systematic changes of the cohesive parameters and their consequences on crack growth through the layers of the strip are shown.
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Keywords
Keywords: Refractories, multilayer ceramics, thermal shock, cohesive zones, interfaces, crack growth
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