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1.8: Розширена форма співвідношення деформації-зміщення
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\[\alpha = 1, \beta = 1 \; x_1 = x, \; \epsilon_{xx}^{\circ} = \frac{1}{2} \left( \frac{\partial u_{x}^{\circ}}{\partial x} + \frac{\partial u_{x}^{\circ}}{\partial x} \right) = \frac{\partial u_{x}^{... $\alpha = 1, \beta = 1 \; x_1 = x, \; \epsilon_{xx}^{\circ} = \frac{1}{2} \left( \frac{\partial u_{x}^{\circ}}{\partial x} + \frac{\partial u_{x}^{\circ}}{\partial x} \right) = \frac{\partial u_{x}^{\circ}}{\partial x}$ $\alpha = 1, \beta = 1 \; x_1 = x \; \kappa_{xx} = -\frac{\partial^2 w}{\partial x^2} = -\frac{\partial}{\partial x} \left( \frac{\partial w}{\partial x} \right) = \frac{\partial}{\partial x} ( - \theta_{x})$