Inspired by natural systems, such as seed pods, pine cones, wheat seeds, flytraps, and vines, representative deformations, including bending, folding, and twisting, have been realized by designing structures and programming deformation for smart materials. In this paper, we present an innovative method of controlled helical structures by designing and fabricating a bilayer structure with a smart material. Our design was numerically studied and experimentally tested. Theoretical analyses were performed to guide the design of the helixing processes. When the bilayer structure was heated above the glass transition temperature, the top layer shrunk and the bottom layer expanded along the printing angle, which resulted in a self-helixing behavior. The parameters affecting the self-helixing behavior of the bilayer structure were studied and discussed. We found that left- and right-handed helical structures were achieved by controlling the printing angle of the top layer. A constitutiv...

中文翻译：

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可编程双层结构的受控螺旋变形：设计和制造

受自然系统（例如种子荚，松果，小麦种子，蝇类和藤本植物）的启发，代表性的变形（包括弯曲，折叠和扭曲）已经通过为智能材料设计结构和编程变形来实现。在本文中，我们提出了一种通过设计和制造具有智能材料的双层结构来控制螺旋结构的创新方法。我们的设计经过了数值研究和实验测试。进行理论分析以指导螺旋工艺的设计。当将双层结构加热到高于玻璃化转变温度时，顶层收缩并且底层沿着印刷角膨胀，这导致自螺旋行为。研究和讨论了影响双层结构自螺旋行为的参数。我们发现通过控制顶层的印刷角度可以实现左旋和右旋螺旋结构。本构...