Abstract Recent studies demonstrate novel metamaterials featuring unique properties by combining origami-inspired designs with additive manufacturing. In particular, the use of flexural hinges endows distinct advantages towards miniaturization and fabrication; however, there are limited applications due to the limited loading and fatigue resistance of the hinges. In this study, we focus on testing and characterizing mechanical properties of flexural hinges so that our findings could have immediate applications in 3D-printed origami structures. We introduce an aramid fiber composite hinge and compare it to a single-material polyamide and a multimaterial photopolymer hinge. We investigate the impact of the materials and geometric design parameters on the load carrying capability and flexural properties. Furthermore, the fatigue behavior of the hinges is characterized, identifying the constitutive mechanisms. We consolidate all the data and findings to construct a comprehensive design parameter – property map, which serves as a guideline for optimizing hinge performance for a given set of required properties.

中文翻译：

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多材料增材制造折纸结构铰链

摘要 最近的研究通过将折纸设计与增材制造相结合，展示了具有独特性能的新型超材料。特别是，弯曲铰链的使用赋予了小型化和制造的明显优势；然而，由于铰链的载荷和抗疲劳性有限，因此应用受到限制。在这项研究中，我们专注于测试和表征弯曲铰链的机械性能，以便我们的发现可以立即应用于 3D 打印的折纸结构。我们介绍了一种芳纶纤维复合铰链，并将其与单材料聚酰胺和多材料光敏聚合物铰链进行比较。我们研究了材料和几何设计参数对承载能力和弯曲性能的影响。此外，铰链的疲劳行为被表征，识别本构机制。我们整合所有数据和发现以构建综合设计参数——特性图，作为优化给定一组所需特性的铰链性能的指南。