This study aimed to understand the effects of core configuration on the mechanical properties of additively manufactured specimens made of commercial wood/PLA filament through 3D printing. The wood/PLA specimens with different infill rates and pattern types, such as square, hexagonal, and octagonal, were manufactured using a 3D printer. The process parameters in the production of the 3D-printed specimens were kept constant, except for the core configuration. The outside layer thickness was kept constant for all the specimens. The specimens with a hexagonal pattern had the highest mechanical properties, followed by the square and octagonal core patterns. In terms of infill rate, the mechanical properties sharply increased with increasing infill rate. In particular, when the infill rate increased from 20 to 50%, the rate of increase in the mechanical properties was significantly higher than that seen from 50 to 80%. The highest rate of the elastic recovery after the Brinell hardness tests was found in the specimens with hexagonal cores, followed by square- and octagonal-shaped cores.

本研究旨在了解核心配置对通过 3D 打印由商业木材/PLA 长丝制成的增材制造标本的机械性能的影响。具有不同填充率和图案类型（例如方形、六边形和八边形）的木材/PLA 试样是使用 3D 打印机制造的。除了核心配置外，3D 打印样本的生产过程参数保持不变。所有试样的外层厚度保持恒定。具有六边形图案的试样具有最高的机械性能，其次是方形和八边形芯图案。在填充率方面，机械性能随着填充率的增加而急剧增加。特别是当填充率从20%提高到50%时，机械性能的增加率明显高于 50% 至 80%。布氏硬度测试后的最高弹性回复率出现在具有六边形芯的试样中，其次是方形和八边形芯。