R. Karthikeyan, V.P. Pradeep, S. Rajkumar, K. Gobinath
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引用次数: 0
摘要
三维打印作为一种多用途、高效率的小规模和大规模制造方法,在商业和工业领域得到了迅速发展。尽管这种方法适应性强,但目前只能使用有限的几种材料,主要是热塑性聚合物。三维打印熔融沉积建模(FDM)为小批量、相对快速地生产复杂部件提供了机会,并为制造商和研究人员提供了高度的灵活性。FDM 的工艺参数,如填充图案、填充密度、打印速度、光栅角度等,都会影响打印部件的机械性能。在这项研究中,引入了一种新的方法来研究 3D 打印部件的内部结构,即在单个部件上组合填充图案(三角形和八边形),并测量了拉伸试验、抗弯强度、压缩强度和硬度等机械性能。根据美国材料与试验协会的标准,采用 FDM 技术在丙烯腈-丁二烯-苯乙烯(ABS)材料上打印试样,XY 构建方向的填充密度分别为 60%、80% 和 100%。扫描电镜分析了不同填充图案的形态和相互粘合情况。结果表明,随着填充密度的增加,机械性能也随之提高。
Effect of Combined Internal Structure on Mechanical Properties of FDM 3D Printed Parts
Commercial and industrial use of 3D printing has swiftly taken off as a versatile and effective method of manufacturing on both a small and large scale. Despite being adaptable, the procedure currently works with a restricted number of materials, mostly thermoplastic polymers. 3D printing fused deposition modeling (FDM) provides opportunities to produce complex components relatively quickly in small batch with a high degree of flexibility for both manufacturer and researcher. Process parameters in FDM like infill pattern, infill density, printing speed, raster angle influences the mechanical properties of a printed parts. In this research study, a novel approach on the internal structure of 3D printed parts say combined infill pattern (Triangles & Octet) on a single part has been introduced and mechanical properties like tensile test, flexural strength, compression strength and hardness were measured. Specimens were printed in Acrylonitrile butadiene styrene (ABS) as per ASTM standards by FDM technology with different infill densities of 60%, 80% and 100% by XY build orientation. SEM analysis was made to analyze the morphological and inter bonding of different infill patterns. The results show that mechanical performance was inflated by an increase in infill density.