Combination of Brazilian test and digital image correlation for mechanical characterization of refractory materials |
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| Affiliation: | 1. Univ. Limoges, CNRS, ENSCI, SPCTS, UMR 7315, F-87000 Limoges, France;2. Univ. Poitiers, CNRS, PPRIME, UPR 3346, F-86962 Futuroscope Chasseneuil, France;3. Univ. Limoges, GEMH, EA 3178, F-19300 Egletons, France;1. College of Architecture and Environment, Sichuan University, Chengdu, 610065, China;2. Key Laboratory of Energy Engineering Safety and Disaster Mechanics, Ministry of Education, Sichuan University, Chengdu, 610065, China;3. Institute of New Energy and Low-Carbon Technology, Sichuan University, Chengdu, China;4. College of Water Resource and Hydropower, Sichuan University, Chengdu, China;1. Science des Procédés Céramiques et Traitements de Surface (SPCTS UMR CNRS 7315), CEC, 12 rue Atlantis, 87068 Limoges Cedex, France;2. Groupe d’Etude des Matériaux Hétérogènes (GEMH), Université de Limoges, 12 rue Atlantis, 87068 Limoges Cedex, France;3. Institut Pprime, CNRS, Université de Poitiers, 11 Boulevard Marie et Pierre Curie, 86962 Futuroscope Chasseneuil Cedex, France;4. Montanuniversität Leoben, Department of Ceramics, Peter-Tunner-Strasse 5, A-8700 Leoben, Austria;5. Institut Universitaire Technologique du limousin, Département GMP, 2 Allée André Maurois, 87065 Limoges Cedex, France;1. Department of Civil Engineering, KU Leuven, Leuven, Belgium;2. Department of Energy Resources Engineering, Seoul National University, Republic of Korea;3. TU Bergakademie Freiberg, Freiberg, Germany;4. Mechatronics Research Group, Korea Institute of Industrial Technology, Republic of Korea;1. Materials Center Leoben Forschung GmbH, Leoben, Austria;2. Institute of Mechanics, Montanuniversitaet Leoben, Leoben, Austria;3. Sandvik Mining and Construction GmbH, Zeltweg, Austria;4. Chair of Subsurface Engineering, Montanuniversitaet Leoben, Leoben, Austria |
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| Abstract: | Flexibility of refractories is an interesting property to improve thermal shock resistance of refractories. It can often be obtained by promoting a nonlinear mechanical behaviour which reduces brittleness. Among industrial refractory materials developed in this aim, magnesia hercynite is of a particular interest for cement industry. As linings for rotary kilns, magnesia hercynite can be submitted to tensile and compressive stresses. Since tensile strength is usually much lower than compressive one for brittle materials, the mechanical characterization is, in such case, more significant in tension than in compression. To overcome difficulties involved by direct tensile test, an indirect tensile test (Brazilian test) has been applied here and combined to digital image correlation in order to measure kinematic fields on the surface of the sample during loading. This combination has allowed to accurately measure initial elastic properties (Young’s modulus and Poisson ratio), to detect crack initiation and to analyze fracture process. |
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| Keywords: | C Fracture C Mechanical properties D MgO E Refractories |
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