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1.5: Гіпотеза Ейлера-Бернуллі
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$\epsilon_{yz} = \frac{1}{2} \left(\frac{ d u_{y}}{ d z} + \frac{ d u_z}{ d y} \right) = \frac{1}{2} \left(\frac{ d v}{ d z} + \frac{ d w}{ d y} \right) = 0$ \[\begin{align} \epsilon_{zx} & = \frac... $\epsilon_{yz} = \frac{1}{2} \left(\frac{ d u_{y}}{ d z} + \frac{ d u_z}{ d y} \right) = \frac{1}{2} \left(\frac{ d v}{ d z} + \frac{ d w}{ d y} \right) = 0$ $\begin{align} \epsilon_{zx} & = \frac{1}{2} \left(\frac{ d u_{z}}{ d x} + \frac{ d u_x}{ d z} \right) = \frac{1}{2} \left(\frac{ d w}{ d x} + \frac{ d u}{ d z} \right) \\ & = \frac{1}{2} \left(\frac{ d w}{ d x} - \frac{ d w}{ d x} \right) = 0 \nonumber \end{align}$