Defect detection in glass fabric reinforced thermoplastics by laboratory-based X-ray scattering

Glass fabric reinforced thermoplastic (GFRT) constitutes a class of composite materials that are especially suited for automobile construction due to their combination of low weight, ease of production and mechanical properties. However, in the manufacturing process, during forming of prefabricated laminates, defects in the glass fabric as well as in the polymer matrix can occur, which may compromise the safety or the lifetime of components. Thus, the detection of defects in GFRTs for production monitoring and a deep understanding of defect formation/evolution is essential for mass production. Here, we experimentally demonstrate that local fiber shifts in the fabric, a type of defect difficult to image with other techniques, can be detected reliably by X-ray scattering based on the edge-illumination principle. This implies applications for research on mechanism of defect formation as well as for industrial application in production monitoring.

Automated summary

Glass fabric reinforced thermoplastic (GFRT) is a composite material suitable for automobile construction due to its low weight, ease of production, and mechanical properties. Defects in the glass fabric and polymer matrix can occur during the manufacturing process, compromising component safety and lifetime. This study demonstrates that X-ray scattering based on the edge-illumination principle reliably detects local fiber shifts in the fabric, a difficult-to-image defect with other techniques, for research and industrial applications in production monitoring.