Aboelella Menna G, Ebeid Samy J, Sayed Moustafa M
Design and Production Engineering Department, Faculty of Engineering, Ain Shams University, Cairo, Egypt.
Sci Rep. 2025 Apr 6;15(1):11759. doi: 10.1038/s41598-025-94446-8.
With the growing popularity of 3D-printed products, material consumption has been a major concern in additive manufacturing in recent years. Choosing the infill structure and the printing parameters for an application can be challenging for product designers and engineers, which can lead to reduced material and increased cost savings while maintaining product functioning.This study investigates the mechanical behavior of 3D-printed PLA structures by exploring the influence of multi-layer infill patterns on tensile and compressive strength. Three common infill patterns (triangular, grid, and honeycomb) were evaluated at 20% and 50% densities. A novel approach was employed, incorporating specimens with single-, two-, and four-layer same pattern combinations, where subsequent layers were rotated 180 degrees to enhance interlayer bonding. Results demonstrated significant improvements in both tensile (up to 64%) and compressive strength (up to 47%) for two-layer structures compared to single-layer counterparts. The findings provide valuable insights into optimizing infill design and layer configurations for improved tensile and compressive strength and material efficiency in 3D-printed structures. This research highlights the potential for optimizing 3D-printed part performance through strategic multi-layer infill design, offering a pathway toward reduced material consumption and enhanced mechanical properties in additive manufacturing.
随着3D打印产品越来越受欢迎，材料消耗近年来一直是增材制造中的一个主要问题。为应用选择填充结构和打印参数对产品设计师和工程师来说可能具有挑战性，这可能会在保持产品功能的同时减少材料使用并增加成本节约。本研究通过探索多层填充图案对拉伸强度和抗压强度的影响，研究了3D打印聚乳酸（PLA）结构的力学行为。在20%和50%的密度下评估了三种常见的填充图案（三角形、网格和蜂窝状）。采用了一种新颖的方法，将具有单层、两层和四层相同图案组合的试样纳入其中，后续层旋转180度以增强层间粘结。结果表明，与单层结构相比，两层结构的拉伸强度（提高了64%）和抗压强度（提高了47%）均有显著提高。这些发现为优化填充设计和层配置提供了有价值的见解，以提高3D打印结构的拉伸强度、抗压强度和材料效率。本研究强调了通过战略性多层填充设计优化3D打印部件性能的潜力，为增材制造中减少材料消耗和提高机械性能提供了一条途径。
