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X-ray computed tomography characterization of manufacturing induced defects in a glass/polyester pultruded profile

机译：玻璃/聚酯拉挤型材中制造引起的缺陷的X射线计算机断层扫描特征

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摘要

Critical assessment of the internal geometry after manufacturing of fiber reinforced polymer composites is essential for developing more reliable and robust production. In the present work, manufacturing induced defects such as fiber misalignment and porosity in a glass/polyester pultruded composite profile are evaluated. The internal geometry of the composite is characterized by X-ray micro-computed tomography (micro-CT) and analyzed using the VoxTex software which allows validated and detailed characterization of the internal geometry. Resin rich areas are observed in between the glass rovings at which the unidirectional fibers are misaligned with respect to the desired pulling direction. Results show that the misalignment in in-plane fiber orientation is more severe (30-40 degrees) than the out-plane fiber orientation (10-20 degrees). Two different types of porosities are quantified: the first one is discontinuous and located inside the resin rich areas; the second one is more severe and continuously located between the glass rovings. The area of the total continuous porosity is estimated approximately as 0.212-0.246 mm(2) per unit length in the pulling direction. The fiber misalignments and resin rich areas cause 15-20% reduction in the studied part stiffness in the longitudinal direction.
机译：在开发纤维增强聚合物复合材料后，对内部几何形状进行严格评估对于开发更可靠，更可靠的生产至关重要。在本工作中，评估了玻璃/聚酯拉挤复合型材中制造引起的缺陷，例如纤维未对准和孔隙率。复合材料的内部几何形状通过X射线计算机断层扫描（micro-CT）进行表征，并使用VoxTex软件进行分析，该软件可以对内部几何形状进行验证和详细表征。在玻璃粗纱之间观察到树脂富集区域，在该区域中，单向纤维相对于所需的拉伸方向未对齐。结果表明，面内纤维取向的错位（30-40度）比面外纤维取向（10-20度）更严重。定量了两种不同类型的孔隙：第一种是不连续的，位于树脂富集区域内部；第二种是不连续的。第二个更严重，连续地位于玻璃粗纱之间。在拉动方向上，每单位长度的总连续孔隙面积估计约为0.212-0.246 mm（2）。纤维错位和树脂富集区域会导致所研究零件的纵向刚度降低15-20％。

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  • 来源
    《Composite Structures》 |2018年第7期|74-82|共9页
  • 作者

    Baran Ismet; Straumit Ilya; Shishkina Oksana; Lomov Stepan V;

  • 作者单位

    Univ Twente, Fac Engn Technol, NL-7500 AE Enschede, Netherlands;

    Katholieke Univ Leuven, Dept Mat Engn, Kasteelpk Arenberg 44, B-3001 Leuven, Belgium;

    Katholieke Univ Leuven, Dept Mat Engn, Kasteelpk Arenberg 44, B-3001 Leuven, Belgium;

    Katholieke Univ Leuven, Dept Mat Engn, Kasteelpk Arenberg 44, B-3001 Leuven, Belgium;

  • 收录信息 美国《科学引文索引》(SCI);美国《工程索引》(EI);
  • 原文格式 PDF
  • 正文语种 eng
  • 中图分类
  • 关键词

    Pultrusion; Microstructures; CT analysis; Microstructure analysis;

    机译：拉挤成型;显微组织;CT分析;显微组织分析;

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