Delamination size dependence on fatigue crack growth in fiber metal laminates
(English)Manuscript (preprint) (Other academic)
A fatigue crack growth study have been carried out in order to reveal the dependence of the delamination shape and size on metal crack growth in fiber metal laminates (GLARE®). Fatigue crack growth tests with center crack tension specimen (CCT) with loading range shifts have been performed. Optical crack growth measurements for surface cracks combined with ultrasonic measurements, to determine the delamination size and shape, have been conducted. Experiment show that the shape of the delamination tip, in particular, but also the delamination size depends strongly on the loading range. The crack growth rate for a given loading range is dissimilar if the prior loading range was different. This dissirnilarity may remain with further crack growth, or disappear with further crack growth. A strong interaction between the development of the delamination tip and a loading shift exists. It is therefore believed that the crack tip shape is causing the dissimilar crack growth rate.
Engineering and Technology
IdentifiersURN: urn:nbn:se:liu:diva-88101OAI: oai:DiVA.org:liu-88101DiVA: diva2:601732