由3D打印波纹带状晶格构成的可变形面板
Shape-shifting panel from 3d-printed undulated ribbon lattice
AI总结：
提出一种由单一材料波纹带构成、具有拉伸-弯曲耦合效应的3D打印晶格微结构，并通过仿真、均匀化理论和实验验证其可作为可变形面板构建单元。
摘要：
能够响应外部刺激而改变形状的材料，为三维物体的高效、多功能设计与塑形开辟了新前景。在此，我们提出一类展现拉伸-弯曲耦合（EBC）效应的新型微结构，可作为可变形面板的基本构建单元。它们由单一材料制成，呈波纹带状网络。研究采用有限元方法分析了单个及相连波纹带的变形机制，以阐明EBC机制的主要特征。对于所提出类别中的一种特定微结构，研究将双尺度均匀化与Kirchhoff-Love板理论相结合，计算了完整的弹性刚度张量。随后，根据单胞的几何参数评估了可实现的EBC比值范围。图案化试样使用商用FFF Ultimaker 3D打印机制造，并在最高20%的有限应变下进行力学测试。通过点跟踪测量的位移与有限元模拟预测相符，表明该结构在有限应变下仍保持其性能。此外，研究提出了一种带点状边界的拉伸试验载荷，以突出其出色的离面位移。我们设想这些结构可与响应式材料结合，用于软体机器人、柔顺系统和可重构结构的驱动，作为外部机械电机、控制系统和动力装置的替代方案。
英文摘要：
Materials that change their shape in response to external stimuli opens up new prospects for efficient and versatile design and shaping of three-dimensional objects. Here, we present a novel class of micro-structures exhibiting an extension-bending coupling (EBC) effect, that can be harnessed as an elementary building block for shape-shifting panels. They are built with a single material as a network of undulated ribbons. The deformations mechanisms of both single and connected undulated ribbons are analysed using the finite element method to explain the main features of the EBC mechanism. For a particular micro-structure of the proposed class, the complete elastic stiffness tensor is computed combining two-scale homogenization with Kirchhoff-Love plate theory. The range of achievable EBC ratio is then assessed with respect to the geometric parameters of the unit cell. Patterned specimens are manufactured using a commercial FFF Ultimaker 3-d printer and are mechanically tested at finite strain up to 20%. The displacement measured by point tracking match the predictions from the finite element simulations and indicate that the structure maintain its properties at finite strain. Moreover, a tensile test load with point-like boundary is proposed to highlight exceptional out of plane displacement. We envision these structures to be leveraged in combination with responsive materials for the actuation of soft robots, compliant systems and reconfigurable structures, as alternatives to external mechanical motors, control systems and power devices.
机构、总结、中文摘要均由AI分析而来，可能存在错误，请以论文正文为准。
