University of Manchester

Investigation of weft tow delamination and matrix cracking damage in 3D woven composite

Stephen Louis Ogin
Project Completed

Scientific Case

The behaviour of 3D woven composites, especially in fatigue, is poorly understood. When glass/epoxy 3D composites are fatigue loaded in the weft direction, unusual triangular features are observed. The geometry of these features is difficult to understand when using conventional optical microscopy. Micro CT is the ideal tool to investigate these features.
Composites

Experiment Design

Rectangular specimens, approximate geometry 5 mm wide, 2 mm thick, 10 mm long, will be scanned. The specimens are optically transparent and the approximate shape of the areas of interest is already known. Consequently, it is anticipated that a maximum of 4 scans is required within the Nikon XTH 225 machine, or equivalent. Resolution required is approximately 5 - 10 microns.
Scanners and Rigs
Nikon XTH225
4
Not Required
1
None - analysis of images will be carried out at Surrey University.

Sample & Safety

Rectangular specimens, approximate geometry 5 mm wide, 2 mm thick, 10 mm long, will be scanned. The specimens are optically transparent and the approximate shape of the areas of interest is already known. Consequently, it is anticipated that a maximum of 4 scans is required within the Nikon 225 machine, or equivalent.

There are no hazards.
4
Low Hazard

Scan Records

Project Report