Quantifying Shear Degradation and Fiber Breakdown in Mold Tooling
Quantifying shear rates and gate geometry limits prevents fiber length attrition, tool surface erosion, and mechanical strength loss in molded composite parts.
Micro CT Scanning
Meaning
High-resolution radiographic imaging determines internal structural integrity by rotating a specimen through a three-dimensional X-ray field. Micro ct scanning captures volumetric data to produce cross-sectional slices without physical contact or material destruction. This process detects microscopic voids, cracks or inclusions within solid objects by mapping attenuation differences across varying densities.
Geometric constraints limit the field of view to the size of the detector and the X-ray source focal spot.
Detection Logic
Digital detectors receive attenuated X-ray beams after penetration of the sample from multiple angles. Sophisticated software reconstructs these raw projections into a three-dimensional digital model through iterative filtered back-projection algorithms. Precise alignment between the source, rotation stage and sensor ensures that voxel resolution reaches sub-micron levels when the specimen sits close to the source.
Signal noise varies according to the exposure duration and the total number of angular steps programmed during the rotation.
Assembly Verification
Component qualification relies on these scans to confirm the presence of solder joints inside opaque plastic packages or the structural continuity of additive manufactured parts. Engineers compare the virtual reconstruction against the original computer-aided design file to identify deviations in wall thickness or internal geometry. Automated comparison algorithms measure the spatial distance between the nominal design surface and the scanned object to highlight areas of deformation or assembly error.
Data Interpretation
Complex analysis requires an adjustment of the gray scale threshold to distinguish between material phases within the scan. Segmentation allows operators to isolate specific features such as internal pores from the bulk material for quantitative volumetric measurement. Voxel size directly dictates the physical accuracy of these measurements during the final inspection of high-value electronic components.
Precise identification of density gradients allows for the detection of structural inconsistencies that standard radiographic methods miss.