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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

Journal of Ceramic Science and Technology, Vol. 7, No. 2 (2016), pp. 203-208

DOI: 10.4416/JCST2016-00004

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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.

Keywords

Keywords: Refractories, multilayer ceramics, thermal shock, cohesive zones, interfaces, crack growth

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