Cactus fibres have previously shown unusual mechanical properties in terms of bending and axial stiffness due to their hierarchical structural morphology. Bioinspiration from those cactus fibres could potentially generate architected materials with exciting properties. To that end we have built bioinspired artificial analogues of cactus fibres to evaluate their mechanical properties. We have generated 3D printed specimens from rendered models of the cactus structure using two different printing techniques to assess the reproducibility of the structural topology. Bioinspired additive manufactured materials with unusual mechanical properties constitute an ever-evolving field for applications ranging from novel wing designs to lightweight plant-inspired analogues. The cactus-inspired 3D printed specimens developed here demonstrate an unusually high bending to axial stiffness ratios regardless of the manufacturing method used. Moreover, when compared to their equivalent beam analogues the cactus specimens demonstrate a significant potential in terms of specific (weight averaged) flexural modulus. Imaging of the artificial cactus reinforcements has enabled the generation of a one-dimensional reduced order finite element model of the cactus structure, with a distribution of cross sections along the length that simulate the inertia and mechanical behaviour of the cactus topology. The novel bioinspired material structure shows an excellent reproducibility across different manufacturing methods and suggest that the tree-like topology of the cactus fibre could be very suited to applications where high bending to axial stiffness ratios are critical.

仙人掌纤维之前由于其分层结构形态而在弯曲和轴向刚度方面表现出不同寻常的机械性能。来自这些仙人掌纤维的生物灵感可能会产生具有令人兴奋的特性的建筑材料。为此，我们构建了仙人掌纤维的仿生人造类似物来评估它们的机械性能。我们使用两种不同的打印技术从仙人掌结构的渲染模型生成 3D 打印样本，以评估结构拓扑的可重复性。具有不同寻常的机械性能的仿生增材制造材料构成了一个不断发展的领域，其应用范围从新颖的机翼设计到轻质植物启发的类似物。无论使用何种制造方法，这里开发的受仙人掌启发的 3D 打印样本都表现出异常高的弯曲与轴向刚度比。此外，与它们的等效梁类似物相比，仙人掌标本在特定（重量平均）弯曲模量方面表现出巨大的潜力。人工仙人掌增强材料的成像能够生成仙人掌结构的一维降阶有限元模型，其横截面沿长度分布，模拟仙人掌拓扑结构的惯性和机械行为。