Ganeshkumar S, Kumar S Dharani, Magarajan U, Rajkumar S, Arulmurugan B, Sharma Shubham, Li Changhe, Ilyas R A, Badran Mohamed Fathy
Department of Mechanical Engineering, Sri Eshwar College of Engineering, Coimbatore 641202, Tamil Nadu, India.
Centre for Machining and Material Testing, Department of Mechanical Engineering, KPR Institute of Engineering and Technology, Coimbatore 641407, Tamil Nadu, India.
Materials (Basel). 2022 Jul 25;15(15):5142. doi: 10.3390/ma15155142.
The advancement of 3D-printing technology has ushered in a new era in the production of machine components, building materials, prototypes, and so on. In 3D-printing techniques, the infill reduces the amount of material used, thereby reducing the printing time and sustaining the aesthetics of the products. Infill patterns play a significant role in the property of the material. In this research, the mechanical properties of specimens are investigated for gyroid, rhombile, circular, truncated octahedron, and honeycomb infill structures (hexagonal). Additionally, the tensile properties of PLA 3D-printed objects concerning their infill pattern are demonstrated. The specimens were prepared with various infill patterns to determine the tensile properties. The fracture of the specimen was simulated and the maximum yield strengths for different infill structures and infill densities were determined. The results show the hexagonal pattern of infill holds remarkable mechanical properties compared with the other infill structures. Through the variation of infill density, the desired tensile strength of PLA can be obtained based on the applications and the optimal weight of the printed parts.
3D打印技术的进步开创了机械部件、建筑材料、原型等生产的新纪元。在3D打印技术中，填充减少了材料的使用量，从而缩短了打印时间并保持了产品的美观。填充图案对材料性能起着重要作用。在本研究中，对类螺旋面、菱形、圆形、截角八面体和蜂窝状（六边形）填充结构的试样力学性能进行了研究。此外，还展示了聚乳酸3D打印物体关于其填充图案的拉伸性能。制备了具有各种填充图案的试样以测定拉伸性能。对试样的断裂进行了模拟，并确定了不同填充结构和填充密度下的最大屈服强度。结果表明，与其他填充结构相比，六边形填充图案具有显著的力学性能。通过改变填充密度，可以根据应用和打印部件的最佳重量获得所需的聚乳酸拉伸强度。
