Characterization of damage mechanisms in glass fibre reinforced polymers using X-ray computed tomography

摘要

A laboratory X-ray computed tomography (CT) device with cone beam geometry and an in-situ tensile test stage was used for the quantitative 3D characterization of damage mechanisms in short glass fibre reinforced polymers. Test specimen geometry was developed that allows for high resolution and tensile testing within the CT device. Interrupted in-situ tensile tests on specimens with perpendicular main fibre orientations were performed. Fibre orientation and damage mechanisms were analysed on single fibre basis using CT data analysis tools. Damage mechanisms that were identified are fibre pull-out, fibre fracture, detachment and matrix cracks. Depending on the main fibre orientation pull-out or detachment is predominant. The determined fibre orientations for different regions showed a correlation to the region of final fracture.