Research and development of Flexibility-controllable structural pipe-in-pipe systems

本研究旨在开发一种全新的柔性可控结构的管中管系统。这种“三明治”系统由外层和内层（通常是偷窃）以及每层之间的核心组成。该系统有趣的特点是，其核心是砂或类似的颗粒材料，这使我们能够轻松控制管道的弯曲性能。进行了理论和实验研究，证明了该系统的优越性。

This research aims to develop a brand-new flexibility-controllable structural pipe-in-pipe system. This "sandwich" system consists of outer and inner layer(usually steal) and cores between each layer. The interesting characteristics of this system is that the core is sand or equivalent granular material, which enable us to easily control the bending property of pipes. Both theoretical and experimental investigation have been carried out and the advantage of this system has been shown.