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结构分析及其与用玻璃纤维增强的微细胞聚胺复合材料的机械性能的相关性

Piotr Szewczykowski¹, Dariusz Sykutera¹, Piotr Czyżewski¹

¹Department of Manufacturing Techniques, Faculty of Mechanical Engineering, Bydgoszcz University of Science and Technology, Kaliskiego 7, 85-796 Bydgoszcz, Poland.

Materials (Basel, Switzerland)

|December 9, 2023

概括

根据MuCell®技术,可以根据厚度产生微细胞模具,其机械性能因厚度而异. 较厚的聚胺样本由于细胞大小减少而表现出增强的强度,微观结构分析和模拟证实了这一点.

科学领域:

材料科学与工程材料科学与工程
聚合物加工聚合物加工
增材制造增材制造增材制造

背景情况:

使用超临界流体的微细胞成型为先进的材料性能提供了潜力.
了解加工参数,微观结构和机械性能之间的关系对于优化聚合物组件至关重要.

研究的目的:

研究样品厚度对通过MuCell®技术生产的聚胺模具的微细胞结构和机械性能的影响.
将实验结果与微细胞模具的数值模拟进行比较.

主要方法:

使用MuCell®技术和,生产薄壁 (2毫米) 和厚壁 (4毫米,6毫米,8.4毫米) 聚胺6和6.6模具,其中30%是玻璃纤维.
微结构分析使用扫描电子显微镜 (SEM) 和X射线计算微断层学 (micro-CT).
机械性能测试 (模,抗拉强度,冲击强度) 和与Moldex3D® 2022模拟进行比较.

主要成果:

薄壁样本 (2毫米) 与厚壁样本相比,显示出较弱的机械性能.
厚壁模具 (4毫米,6毫米,8.4毫米) 显示出出色的机械性能.
SEM,微CT和模拟数据表明,随着样本厚度的增加,细胞大小直径的减少.

结论:

样品厚度显著影响MuCell®成型零件的微细胞结构和机械性能.
增加样品厚度导致玻璃纤维增强聚胺的更细的细胞结构和更好的机械性能.
数字模拟有效地补充了实验观察,以了解微细胞成型现象.

关键词:

在X射线计算微断层扫描中使用X射线.机械性能机械性能机械性能数字模拟的数字模拟.聚合物矩阵复合材料的复合材料有孔的材料是多孔的材料.

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