M Modulus (using shear modulus and bulk modulus)

Input(s)

G: Shear Modulus $\left(\mathrm{N} / \mathrm{m}^{2}\right)$

K: Bulk Modulus $\left(\mathrm{N} / \mathrm{m}^{2}\right)$

Output(s)

M: M Modulus $\left(\mathrm{N} / \mathrm{m}^{2}\right)$

Formula(s)

$$ \mathrm{M}=\mathrm{K}+4 * \frac{\mathrm{G}}{3} $$

Reference(s)

Mark D. Zoback, Reservoir Geomechanics, Cambridge University Press, UK, Page: 64.