Micro-CT analysis of internal geometry of chopped carbon fiber tapes reinforced thermoplastics
Micro-CT analysis of internal geometry of chopped carbon fiber tapes reinforced thermoplastics
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DOI：
10.1016/j.compositesa.2016.10.013
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发表时间：
2016-12
影响因子：
8.7
通讯作者：
Y. Wan;I. Straumit;J. Takahashi;S. Lomov
中科院分区：
文献类型：
--
作者：
Y. Wan;I. Straumit;J. Takahashi;S. Lomov
充分表征随机纤维复合材料的内部几何结构，以预测其性能，需要采集和分析大量的数据。本文提出了一种利用X射线显微CT测量和量化超薄短切碳纤维带增强热塑性塑料（UT-CTT）内部几何形状的方法。使用专门的图像处理方法来表征双尺度纤维取向分布（带和带内纤维的取向）、带形态、3D结构和取向错位。结果表明，所应用的方法可以提供详细的信息，如主取向方向，磁带波度和分裂的内部几何UT-CTT。UT-CTT生产与不同的成型压力进行了研究，以确认的能力的方法区分细微的结构变化所造成的不同的成型条件。
Adequate characterization of the internal geometry of random fiber composites for prediction of their properties requires acquisition and analysis of vast amount of data. The present work proposes a method to measure and quantify the internal geometry of ultra-thin chopped carbon fiber tape reinforced thermoplastics (UT-CTT), a kind of randomly oriented strands, using the X-ray micro-CT. The two-scale fiber orientation distributions (orientation of the tapes and of the fibers inside the tapes), tape morphology, 3D structure and orientation misalignment were characterized using a specialized image processing methodology. The results indicate that the applied method can provide detailed information like primary orientation directions, tape waviness and splitting of the internal geometry of UT-CTT. UT-CTTs produced with different molding pressure were studied to confirm the capability of the methodology in distinguishing subtle structure changes caused by different molding conditions.