Other mechanical properties
Rock mechanics - Physical and mechanical characterization of rocks
Quizzed article REF: C350 V2
Other mechanical properties
Rock mechanics - Physical and mechanical characterization of rocks

Authors : Richard GIOT, Stephen HÉDAN, Philippe COSENZA

Publication date: May 10, 2023 | Lire en français

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6. Other mechanical properties

6.1 Fragility index

The brittleness index of a rock, generally noted FR, is defined by the ratio of its simple compressive strength σ c to its tensile strength measured by Brazilian test σ t :

FR=σcσt( 73 )

It can be used to characterize the drillability and fracture behavior of hard rock, making it particularly useful for rock work such as excavating underground...

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