Applicability of image correlation techniques to characterise asymmetric refractory creep during bending tests

The design of fibre reinforced refractory castable structures for high temperature applications requires the characterisation of the material creep behaviour. As many other heterogeneous ceramics, these materials creep faster under tensile stresses than under compressive ones because of the motion o...

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Bibliographic Details
Published in:Journal of the European Ceramic Society 2013-02, Vol.33 (2), p.221-231
Main Authors: Dusserre, G., Nazaret, F., Robert, L., Cutard, T.
Format: Article
Language:English
Subjects:
3D Digital Image Correlation
Asymmetry
Asymmetry tension–compression
Bend tests
Castable refractories
Ceramics
Correlation
Creep
Creep (materials)
Engineering Sciences
Mechanical properties
Refractories
Strain
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Summary:The design of fibre reinforced refractory castable structures for high temperature applications requires the characterisation of the material creep behaviour. As many other heterogeneous ceramics, these materials creep faster under tensile stresses than under compressive ones because of the motion of hard particles in a soft matrix. Bending tests have been performed to characterise the creep behaviour of the considered material, and 3D digital image correlation is used to obtain strain fields after interrupted tests. The position of the neutral axis, defined here from the residual inelastic strain field, allows to highlight the asymmetry of creep and to evaluate the asymmetry ratio.
ISSN:0955-2219
1873-619X
DOI:10.1016/j.jeurceramsoc.2012.09.011