Fórmula 3

D_{55, calc}^{''} = \frac{1}{\int_{- t / 2}^{t / 2} \frac{1}{G_{yz}^{''} (z)} (\frac{\int_{z}^{t / 2} E_{y}^{''} (\bar{z}) (\bar{z} - z_{0, y}) d \bar{z}}{\int_{- t / 2}^{t / 2} E_{y}^{''} (\bar{z}) (\bar{z} - z_{0, y})^{2} d \bar{z}}) d z}, z_{0, y} = \frac{\int_{- t / 2}^{t / 2} E_{y}^{''} (\bar{z}) \bar{z} d \bar{z}}{\int_{- t / 2}^{t / 2} E_{y}^{''} (\bar{z}) d \bar{z}}

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