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In-situ X-ray computed tomography of composites subjected to fatigue loading

: Wagner, Peter; Schwarzhaupt, Oliver; May, Michael


Materials letters 236 (2019), pp.128-130
ISSN: 0167-577X
Journal Article
Fraunhofer EMI ()
Fraunhofer LBF ()
composite material; polymeric composite; deformation and fracture; fatigue; x-ray technique; matrix cracking

In-situ X-ray computed tomography and online stiffness monitoring were used to study damage initiation and propagation in multi-directional carbon fiber reinforced composite coupon subjected to tension-tension fatigue loading. It was found that a resolution of the CT system of 8 µm was sufficient to capture matrix crack inside the specimen. A clear correlation was found between the increasing number of matrix cracks and the observed stiffness degradation of the composite specimen.