We investigate the morphing of bilayer naturally curved beams and cylindrical shells due to oil extraction from the outer layers. We fabricate bilayer naturally curved beams and cylindrical shells made of PDMS/(PDMS + silicone oil), use the experimental results to validate an explicit formula delivering the change in curvature of the beams, based on the modeling of oil extraction as a bulk contraction. We show as the same model, set up within a 3D context, delivers the morphing of bilayer cylindrical shells and identify potentially interesting results for designing future experiments. In particular, we show as stable states corresponding to the original cylindrical shells can be got in the form of saddle-like shells and cylindrical shells with the axes of principal curvatures switched with respect to the original axes.

我们调查了双层自然弯曲梁和圆柱壳的变形，这些变形是由于从外层提取油引起的。我们制造了双层自然弯曲的梁和由PDMS /（PDMS +硅油）制成的圆柱壳，并使用实验结果验证了基于梁抽油的整体收缩模型来传递梁曲率变化的显式公式。我们展示了在3D环境中建立的同一模型，该模型可提供双层圆柱壳的变形并识别潜在的有趣结果，以设计未来的实验。特别地，我们表明，可以以鞍状壳和圆柱壳的形式获得与原始圆柱壳相对应的稳定状态，其中主曲率轴相对于原始轴进行切换。