Indentation tests have been carried out on a marble in order to define the role of the intra-grain microcracks on its mechanical behavior. The investigated marble shows a strong variability in grain-texture (granoblastic to xenoblastic) also on the scale of centimeter and contains different types of microdiscontinuities (cleavage cracks, grain boundaries cracks), despite the almost monomineralic composition of calcite crystals. The mechanical properties of the calcite grains have been determined by applying static non-instrumented Vickers and Knoop indentations and Berkovich nanoindentation in Continuous Stiffness Measurements (CSM) mode. The study has clearly revealed the influence of microcracks on the mechanical strength and deformability characteristics of the investigated rock, even on the smallest scales. © 2012 Elsevier Ltd.

Bandini, A., Sebastiani, M., Bemporad, E. (2012). Effects of intra-crystalline microcracks on the mechanical behavior under indentation of a marble. INTERNATIONAL JOURNAL OF ROCK MECHANICS AND MINING SCIENCES, 54, 47-55 [10.1016/j.ijrmms.2012.05.024].

Effects of intra-crystalline microcracks on the mechanical behavior under indentation of a marble

SEBASTIANI, MARCO;BEMPORAD, Edoardo
2012-01-01

Abstract

Indentation tests have been carried out on a marble in order to define the role of the intra-grain microcracks on its mechanical behavior. The investigated marble shows a strong variability in grain-texture (granoblastic to xenoblastic) also on the scale of centimeter and contains different types of microdiscontinuities (cleavage cracks, grain boundaries cracks), despite the almost monomineralic composition of calcite crystals. The mechanical properties of the calcite grains have been determined by applying static non-instrumented Vickers and Knoop indentations and Berkovich nanoindentation in Continuous Stiffness Measurements (CSM) mode. The study has clearly revealed the influence of microcracks on the mechanical strength and deformability characteristics of the investigated rock, even on the smallest scales. © 2012 Elsevier Ltd.
2012
Bandini, A., Sebastiani, M., Bemporad, E. (2012). Effects of intra-crystalline microcracks on the mechanical behavior under indentation of a marble. INTERNATIONAL JOURNAL OF ROCK MECHANICS AND MINING SCIENCES, 54, 47-55 [10.1016/j.ijrmms.2012.05.024].
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Utilizza questo identificativo per citare o creare un link a questo documento: https://hdl.handle.net/11590/278701
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