Region-of-Interest X-Ray Tomography for the Non-Destructive Characterization of Local Fiber Orientation in Large Fiber Composite Parts
| Autor: | Dascha Dobrovolskij, Kilian Dremel, Jonas Graetz, Simon Zabler, Katja Schladitz |
|---|---|
| Rok vydání: | 2019 |
| Předmět: |
010302 applied physics
Materials science business.industry Mechanical Engineering Fiber orientation Composite number X-ray 02 engineering and technology 021001 nanoscience & nanotechnology 01 natural sciences Characterization (materials science) Optics Mechanics of Materials Region of interest Non destructive 0103 physical sciences General Materials Science Tomography Fiber 0210 nano-technology business |
| Zdroj: | Key Engineering Materials. 809:587-593 |
| ISSN: | 1662-9795 |
| DOI: | 10.4028/www.scientific.net/kem.809.587 |
| Popis: | To detect and characterize materials defects in fiber composites as well as for evaluatingthe three-dimensional local fiber orientation in the latter, X-ray micro-CT is the preferred methodof choice. When micro computed tomography is applied to inspect large components, the method isreferred to as region-of-interest computed tomography. Parts can be as large as 10 cm wide and 1 mlong, while the measurement volume of micro computed tomography is a cylinder of only 4 − 5 mmdiameter (typical wall thickness of fiber composite parts). In this report, the potentials and limits ofregion-of-interest computed tomography are discussed with regard to spatial resolution and precisionwhen evaluating defects and local fiber orientation in squeeze cast components. The micro computedtomography scanner metRIC at Fraunhofer‘s Development Center X-ray Technology EZRT deliversregion-of-interest computed tomography up to a spatial resolution of 2 μm/voxel, which is sufficientfor determining the orientation of natural or synthetic fibers, wood, carbon and glass. The mean localfiber orientation is estimated on an isotropic structuring element of approximately 0.1 mm length bymeans of volume image analysis (MAVI software package by Fraunhofer ITWM). Knowing the exactlocal fiber orientation is critical for estimating anisotropic thermal conductivity and materials strength. |
| Databáze: | OpenAIRE |
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