Characterisation of Tensile Damage in Rock Samples Induced by Different Stress Paths |
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Authors: | Patrick Ganne André Vervoort |
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Institution: | (1) Research Unit Mining, K.U.Leuven, Kasteelpark Arenberg 40, B-3001 Leuven, Belgium |
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Abstract: | Cracks, induced by different stress states, are studied systematically on thin slices of crinoidal limestone samples. Samples
damaged by tension are compared to samples in which first damage is induced by compressive stresses, followed by tensile stresses.
To quantify the effect of the compressive stresses, samples only damaged by compression are also studied. The tensile stresses
cause the occurrence of an intergranular crack. When the sample is first damaged by compressive stresses, former induced damage
influences the growth of this crack. It results in an intergranular crack with a zigzag profile. The average orientation of
the intergranular crack is, however, the same as in the samples damaged by tension only. |
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Keywords: | Micro-damage fractures stress path tensile stresses crinoidal limestone |
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