Purpose

The aim of this paper is to analyze the mechanical properties of acrylonitrile-butadiene-styrene (ABS) parts manufactured through fused filament fabrication and compare these results to analogous ones obtained on polylactic acid (PLA) and PLA–wood specimens to contribute for a wider understanding of the different materials used for additive manufacturing.

Design/methodology/approach

With that aim, an experimental based on an L27 Taguchi array was used to combine the specific parameters taken into account in the study, namely, layer height, nozzle diameter, infill density, orientation and printing velocity. All samples were subjected to a four-point bending test performed according to the ASTM D6272 standard.

Findings

Young’s modulus, elastic limit, maximum stress and maximum deformation of every sample were computed and subjected to an analysis of variance. Results prove that layer height and nozzle diameter are the most significant factors that affect the mechanical resistance in pieces generated through additive manufacturing and subjected to bending loads, regardless of the material.

Practical implications

The best results were obtained by combining a layer height of 0.1 mm and a nozzle diameter of 0.6 mm. The comparison of materials evidenced that PLA and its composite version reinforced with wood particles present more rigidity than ABS, whereas the latter can experience further deflection before break.

Originality/value

This study is of interest for manufacturers that want to decide which is the best material to be applied for their application, as it derives in a practical technical recommendation of the best parameters that should be selected to treat the material during the fused filament fabrication process.

中文翻译：

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ABS，PLA和通过熔融长丝制造的PLA-木材复合材料的弯曲性能比较研究

目的

本文的目的是分析通过熔融长丝制造的丙烯腈-丁二烯-苯乙烯（ABS）零件的机械性能，并将这些结果与在聚乳酸（PLA）和PLA-木材样品上获得的类似结果进行比较，从而为更广泛的应用做出贡献了解用于增材制造的不同材料。

设计/方法/方法

为此目的，使用基于L27 Taguchi阵列的实验来组合研究中考虑的特定参数，即层高，喷嘴直径，填充密度，方向和印刷速度。所有样品均经受根据ASTM D6272标准进行的四点弯曲测试。

发现

计算每个样品的杨氏模量，弹性极限，最大应力和最大变形，并进行方差分析。结果证明，层高和喷嘴​​直径是影响通过增材制造产生的零件并承受弯曲载荷的机械阻力的最重要因素，而与材料无关。

实际影响

通过结合0.1毫米的层高和0.6毫米的喷嘴直径获得最佳结果。材料的比较表明，PLA及其复合材料（用木屑增强）比ABS具有更高的刚性，而后者在断裂前可能会发生进一步的挠曲。

创意/价值

这项研究对于希望决定哪种材料是最适合其应用的制造商来说很有意义，因为它是从实用技术建议中得出的最佳参数，该参数应在熔丝制造过程中选择处理材料的最佳方法。