Fiber orientation measurement from mesoscale CT scans of prepreg platelet molded composites
| Autor: | Drew E. Sommer, William B. Avery, R. Byron Pipes, Anthony J. Favaloro, Benjamin R. Denos |
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| Rok vydání: | 2018 |
| Předmět: |
Materials science
Orientation (computer vision) Composite number Resolution (electron density) 02 engineering and technology Molding (process) 010402 general chemistry 021001 nanoscience & nanotechnology 01 natural sciences Structure tensor Collimated light 0104 chemical sciences Mechanics of Materials Microscopy Ceramics and Composites Fiber Composite material 0210 nano-technology |
| Zdroj: | Composites Part A: Applied Science and Manufacturing. 114:241-249 |
| ISSN: | 1359-835X |
| DOI: | 10.1016/j.compositesa.2018.08.024 |
| Popis: | X-ray computed tomography (CT) analysis is used to measure the heterogeneous fiber orientation fields in a 20 cm 3 composite bracket made from prepreg platelet-based molding compound (PPMC). The as-molded mesostructure of the complete geometry is captured using material density gradients in 50 µm resolution CT scans without the need to resolve individual fibers. Fiber collimation and physical density gradients within intact platelets of this material system facilitates nondestructive assessment of average local fiber orientation at the component scale. Microscopy-based validation of the local orientation measurements indicate the accuracy that can be attained utilizing the density-based structure tensor CT analysis method. Local orientation field measurements for the complete geometry can be mapped into a “digital twin” model, for purposes such as experimental performance simulation and validation of molding process orientation state predictions. Composite designers, analysts, and material suppliers can employ this methodology to more confidently utilize PPMCs and morphologically similar composite material systems. |
| Databáze: | OpenAIRE |
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