Abstract
Refractory ceramics used as kiln furniture are designed to operate at elevated temperatures with a high thermal shock resistance. In practice the material fails, however, due to thermal fatigue after a limited number of cycles. To predict this failure behaviour it is generally not possible to use Linear Elastic Fracture Mechanics due to the fact that the coarse grained, porous material shows a nonlinear mechanical behaviour. Therefore four different FE models widely used for concrete modelling, are investigated on their ability to describe the nonlinear failure behaviour, in particular the associated size effect phenomenon. Two of the FE models, Discrete Crack and Smeared Crack, are available in DIANA. The other two, Nonlocal Continuum Damage Mechanics and Local Continuum Damage Mechanics, have been implemented in DIANA 5.1. The results of the Nonlocal CDM model indicate that this model cannot properly describe the expected size effect. The other three models, however, give comparable results with a good description of the size effect phenomenon.
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© 1994 Springer Science+Business Media Dordrecht
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van Gils, M.A.J., Dortmans, L.J.M.G., De With, G., Brekelmans, W.A.M., De Vree, J.H.P. (1994). Size Effect Predictions by Fracture Models for a Refractory Ceramic. In: Kusters, G.M.A., Hendriks, M.A.N. (eds) DIANA Computational Mechanics ‘94. Springer, Dordrecht. https://doi.org/10.1007/978-94-011-1046-4_14
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DOI: https://doi.org/10.1007/978-94-011-1046-4_14
Publisher Name: Springer, Dordrecht
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