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用FDM打印的PETG和PETG+CF对可变充填架构和滑剂暴露的机械和微观结构反应

Lidija Rihar¹, Elvis Hozdić¹

¹Faculty of Mechanical Engineering, University of Novo Mesto, Na Loko 2, SI-8000 Novo Mesto, Slovenia.

|March 14, 2026

概括

在3D打印的PETG组件中,优化填充模式和密度可显著提高拉伸强度和机械可靠性. 建筑意识的设计对于暴露在滑剂等服务流体中的组件至关重要.

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
聚合物工程聚合物工程

背景情况:

聚合沉积模型 (FDM) 对于快速的聚合物组件制造至关重要.
零件的可靠性取决于内部架构,孔径和流体暴露.
PETG和PETG+CF是常见的FDM材料,具有不同的机械性能.

研究的目的:

量化填充图案,密度和滑剂暴露对FDM打印的PETG和PETG+CF的影响.
为了将微观结构特征,特别是孔隙性,与机械性能相关联.
在FDM应用中建立建筑意识设计的指导方针.

主要方法:

使用FDM/FFF打印的标本按照ISO 527-2标准进行打印.
在5毫米/分钟的拉伸测试中,以确定Young的模块和应变到破裂.
微结构分析以量化多孔性及其与机械性质的关系.

主要成果:

在30%密度的六角灌装中,PETG的抗拉强度最高 (18.54 MPa).
增加的线性灌装密度 (高达100%) 显著提高了PETG和PETG+CF的强度,与降低的孔隙性相关.
滑剂暴露使PETG强度降低了~17%,但对PETG+CF的影响很小.

结论:

灌装拓和密度极大地影响FDM打印PETG的机械性能.
通过优化灌装密度减少孔隙性,可以提高拉伸强度.
与整洁的PETG相比,PETG+CF对滑剂诱导的降解具有优越的抵抗力.

关键词:

在FDM/FFFF中.在PETG中使用PETG.在PETG+CF中使用.填充密度的填充密度是什么填充模式的填充模式暴露于矿物发动机油的情况.光学显微镜的光学显微镜.孔隙性量化测量孔隙性量化测量过程结构财产具有拉伸性质的特性.

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