The Effect of Raster Pattern and Acetic Acid Exposure on the Mechanical and Failure Properties of Additively Manufactured PLA and PLA-wood Composite Specimens
The Effect of Raster Pattern and Acetic Acid Exposure on the Mechanical and Failure Properties of Additively Manufactured PLA and PLA-wood Composite Specimens
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DOI：
10.1007/s11668-023-01681-0
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发表时间：
2023-05-29
影响因子：
1.2
通讯作者：
Roberson, David A.
中科院分区：
文献类型：
--
作者：
Carrillo, Luis Lares E.;Salazar, Jose F.;Roberson, David A.
了解增材制造的组件如何与给定的环境相互作用，对于推动该技术的发展至关重要。采用熔丝制造的增材制造工艺制备了由聚乳酸和聚乳酸-木材复合材料组成的试样。光栅图案以及暴露于乙酸（以苹果醋的形式）对机械性能的影响，通过拉伸测试和动态力学分析。暴露于苹果醋发生在60摄氏度的温度下持续168小时。通过对收集的数据应用Tukey-Kramer诚实显著性差异检验来确定样本池之间的差异。水分吸收和光栅图案之间的关系进行了评估，发现不同的材料类型。用扫描电子显微镜进行了全面的断裂表面分析，深入了解了光栅图案和材料类型对断裂表面形态的影响。还注意到，细菌生长发生在PLA-木材复合材料试样上，但不在PLA试样上。这里进行的一个关键观察是绝热剪切带的存在，这可能是第一次在熔丝制造的情况下观察到这种现象。
Understanding how additively manufactured components interact with a given environment is critical for the furthering of the technology. Specimens composed of polylactic acid and a polylactic acid-wood composite were made with the additive manufacturing process of fused filament fabrication. The effect of raster pattern as well as exposure to acetic acid (in the form of apple cider vinegar) on mechanical properties was made via tensile testing and dynamic mechanical analysis. Exposure to the apple cider vinegar occurred at a temperature of 60 degrees C for a duration of 168 h. Differences between sample pools were ascertained by application of the Tukey-Kramer honestly significant difference test to collected data. The relationship between moisture absorption and raster pattern was assessed and found to differ between material types. A comprehensive fracture surface analysis was carried out with scanning electron microscopy which gave insight to the effect of raster pattern and material type on fracture surface morphology. It was also noted that bacterial growth occurred on the PLA-wood composite specimens, but not on the PLA specimens. A key observation made here was the presence of adiabatic shear bands, which is potentially the first time this phenomenon has been observed in the case of fused filament fabrication.