  The local fiber orientation is a micro-structural feature crucial for the
mechanical properties of parts made from fiber reinforced polymers. It can be
determined from micro-computed tomography data and subsequent quantitative
analysis of the resulting 3D images. However, although being by nature
non-destructive, this method so far has required to cut samples of a few
millimeter edge length in order to achieve the high lateral resolution needed
for the analysis. Here, we report on the successful combination of
region-of-interest scanning with structure texture orientation analysis
rendering the above described approach truly non-destructive. Several regions
of interest in a large bearing part from the automotive industry made of fiber
reinforced polymer are scanned and analyzed. Differences of these regions with
respect to local fiber orientation are quantified. Moreover, consistency of the
analysis based on scans at varying lateral resolutions is proved. Finally,
measured and numerically simulated orientation tensors are compared for one of
the regions.
