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使用纤维布拉格格网传感器3D打印聚合物材料的热膨胀系数的表征

Constantina Matsika-Klossa¹, Nikoleta Chatzidai¹, Charoula Kousiatza¹

¹Department of Industrial Management and Technology, University of Piraeus, 18534 Piraeus, Greece.

Materials (Basel, Switzerland)

|September 28, 2024

概括

这项研究确定了使用纤维布拉格格 (FBG) 传感器3D打印材料的热膨胀系数 (CTE). 切碎的碳纤维增强聚胺 (CF-PA) 显示了最低的CTE,表明其适用于高性能应用.

科学领域:

材料科学材料科学材料科学
增材制造增材制造增材制造
聚合物科学聚合物科学

背景情况:

沉积建模 (FDM) 是一种广泛使用的3D打印技术.
对材料属性的准确表征,如热膨胀,对于FDM应用至关重要.
测量热膨胀的传统方法对于复杂的3D打印几何形状可能具有挑战性.

研究的目的:

为了确定通过FDM制造的各种热塑和复合材料的热膨胀系数 (CTE).
为了研究打印方向对FDM零件的CTE的影响.
评估使用纤维布拉格格 (FBG) 传感器在热负荷期间进行现场CTE测量.

主要方法:

在打印过程中将FBG传感器嵌入到FDM标本中 (0°和90°的线方向).
将标本置于热负荷下,并使用FBG波长转移测量热诱导的应变.
从应变温度数据计算CTE和玻璃过渡温度 (Tg).
印刷和热循环后残留菌株的特征.

主要成果:

切碎的碳纤维增强聚胺 (CF-PA/0°) 显示出最低的CTE (14 × 10−6/°C).
聚乙块胺 (PEBA) 在0°和90°方向 (CTE值分别为117 × 10−6/°C和108 × 10−6/°C) 显示出最同位素的热反应.
对于两种印刷方向的PEBA,观察到类似的残留菌株.

结论:

基于FBG的方法提供了一种有效的实验技术,用于3D打印材料的CTE表征.
材料选择和打印方向显著影响FDM零件的CTE.
对于需要低热膨胀的应用,CF-PA是一种有前途的材料.

关键词:

化沉积模型的模拟用碳纤维增强的聚合物.的热膨胀系数.纤维布拉格格子格子格子玻璃过渡温度是玻璃过渡温度.拉斯特的方向拉斯特的方向剩余的菌株剩余的菌株热塑性材料是一种热塑性材料.

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