As with all forms of axial deformation there is a corresponding transverse plane deformation. Transverse cross-sectional planes will deform according to [[Poisson's Ratio|Poisson’s ratio]]: $\varepsilon_y=\varepsilon_z=−\nu\varepsilon_x$ $\varepsilon_y=\varepsilon_z=\nu\dfrac{y}{\rho}$ The expansion and contraction of surfaces above and below the neutral surface will cause curvature in the transverse planes. The transverse curvature can be described by the anticlastic radius of curvature, $\rho^\prime$. $\rho^\prime=\dfrac{\rho}{\nu}​$ ![[anticlastic.png|center|300]]