Rock Physics of Shale - Stanford University
Rock Physics of Shale - Stanford University
Rock Physics of Shale - Stanford University
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Quantifying Brittleness<br />
Because material failure is important in many technologies, there<br />
are many attempts to define or quantify a Brittleness Index, e.g.<br />
€<br />
B 1 = σ c<br />
σ t<br />
where<br />
€<br />
€<br />
€<br />
€<br />
B 2 = σ c − σ t<br />
σ c + σ t<br />
σ c<br />
σ t<br />
q<br />
Kahraman, 2003, Engineering Geology 65 (2002) 269–283<br />
B 2 = qσ c<br />
= Uniaxial compressive strength<br />
= Tensile € strength<br />
= Amount <strong>of</strong> fines in impact test<br />
56<br />
Gary Mavko – <strong>Stanford</strong> <strong>Rock</strong> <strong>Physics</strong> Laboratory
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