挤出 4D 印刷参数对聚乳酸(PLA)热形变行为的影响

IF 2.9 3区 工程技术 Q2 AUTOMATION & CONTROL SYSTEMS
Aref Ansaripour, Mohammad Heidari-Rarani, Rasoul Mahshid, Mahdi Bodaghi
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引用次数: 0

摘要

通过四维(4D)打印,简单的非活性结构可以转变为复杂的活性结构。控制弯曲变形、活化时间和温度对四维打印至关重要。本研究旨在全面评估和分析不同工艺参数对材料挤出增材制造生产的聚乳酸(PLA)成型弯曲变形的影响。这些参数包括层数、层厚、打印速度、喷嘴温度、喷嘴直径和床层温度。由于弯曲变形受试样壁的影响很大,本研究首次关注了工艺参数和试样壁对变形的同时影响。此外,研究还考察了印刷参数对活化时间和活化温度的影响。结果表明,增加部件中储存的预应变会导致活化时间和活化温度的降低。随后,采用田口实验设计法优化了对弯曲变形影响最大的参数。最佳预测变形与实验变形之间的差异小于 2%。层厚、分层、喷嘴温度和印刷速度分别被认为是控制变形最有效的参数。
本文章由计算机程序翻译,如有差异,请以英文原文为准。

Influence of extrusion 4D printing parameters on the thermal shape-morphing behaviors of polylactic acid (PLA)

Influence of extrusion 4D printing parameters on the thermal shape-morphing behaviors of polylactic acid (PLA)

A simple and inactive structure is able to transform into a complex and active one via four-dimensional (4D) printing. Controlling bending deformation, activation time, and temperature is crucial in 4D printing. This study aimed to comprehensively evaluate and analyze the effect of different process parameters on the bending deformation of polylactic acid (PLA) shape-morphing produced by material extrusion additive manufacturing. These parameters included layup, layer thickness, printing speed, nozzle temperature, nozzle diameter, and bed temperature. Since the bending deformation is significantly affected by the specimen wall, this study has focused, for the first time, on the simultaneous influence of process parameters and presence of a wall on the deformation. Furthermore, the study examined the influence of printing parameters on activation time and activation temperature. The results indicated that increasing the pre-strain stored in the parts led to a decrease in activation time and activation temperature. Subsequently, the Taguchi design of experiment method was used to optimize the most influential parameters on the bending deformation. The difference between the optimal predicted and the experimental deformations was less than 2%. Layer thickness, layup, nozzle temperature, and printing speed were recognized as the most effective parameters for controlling deformation, respectively.

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来源期刊
CiteScore
5.70
自引率
17.60%
发文量
2008
审稿时长
62 days
期刊介绍: The International Journal of Advanced Manufacturing Technology bridges the gap between pure research journals and the more practical publications on advanced manufacturing and systems. It therefore provides an outstanding forum for papers covering applications-based research topics relevant to manufacturing processes, machines and process integration.
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