Abstract In this paper, a lattice structure whose mechanical properties can be systematically designed is presented using tailored sub-unit structures made from curved bars. First, the stiffness of circular-arc curved bars is theoretically studied, and the effects of geometric parameters of the curved bars on the mechanical properties are analyzed. Second, sub-unit structures are designed based on the fractal geometry, and periodic structures for lattice structures assembled from different sub-unit structures are precisely fabricated using 3D printing techniques. Third, mechanical properties of structures are mechanically measured and numerically simulated simultaneously, which present anisotropy of stiffness depending on the loading direction. These results show that the controllable stiffness of lattice structures along different directions can be designed by changing structure geometry and degrees of fractal. This study proposes a new method for the design of lattice structures and potential in versatile industrial and biomedical applications.

中文翻译：

---

圆弧曲线钢筋晶格结构的合理设计与表征

摘要 在本文中，使用由弯曲杆制成的定制子单元结构，提出了一种可以系统设计力学性能的晶格结构。首先，对圆弧弯杆刚度进行了理论研究，分析了弯杆几何参数对力学性能的影响。其次，基于分形几何设计子单元结构，使用3D打印技术精确制造由不同子单元结构组装的晶格结构的周期性结构。第三，结构的力学性能同时进行机械测量和数值模拟，其呈现出取决于加载方向的刚度各向异性。这些结果表明，可以通过改变结构几何形状和分形度来设计沿不同方向的晶格结构的可控刚度。这项研究提出了一种设计晶格结构的新方法，并在多功能工业和生物医学应用中发挥了潜力。