Governing Equations:
The equation given by Newmark, applicable beneath the corner of an area B x L:
(Note: This App has been modified to assess the stress increment below the centre of loaded area)
$$
q_v = q_0 \cdot \frac{1}{4\pi} \left[ \frac{2MN \sqrt{V} \left( V + 1 \right)}{(V+V_1)V} + \tan^{-1} \left( \frac{2MN \sqrt{V}}{V - V_1} \right) \right]
$$
where
$$ \quad M = \frac{B}{z} $$
$$ \quad N = \frac{L}{z} $$
$$ \quad (q_v = q_0 \text{ for } z = 0) $$
$$ V = M^2 + N^2 + 1 $$
$$ \quad V_1 = (MN)^2 $$
