Formule 6

\begin{array}{l} d^{+} = g^{+} = 1 - \frac{r_{0}^{+}}{r^{+}} \cdot \{(1 - A^{+}) + A^{+} \exp [B^{+} \cdot (1 - \frac{r^{+}}{r_{0}^{+}}))]) (Equation 54, tension)\} \\ d^{-} = g^{-} = 1 - \frac{r_{0}^{-}}{r^{-}} \cdot \{(1 - A^{-}) + A^{-} \exp [B^{-} \cdot (1 - \frac{r^{-}}{r_{0}^{-}}))]) (Equation 58, compression)\} \\ \to d^{+ / -} = r^{+ / -} \cdot h^{+ / -} \leq 0 \end{array}

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