Parametric study for som variabels, which affects the fatigue crack growth of fiber metal laminates
(English)Manuscript (preprint) (Other academic)
Research has been carried out to investigate the crack growth behavior of glass fiber reinforced aluminum laminates (GLARE®). In order to prove the validity of an effective stress intensity range model found in the literature, a parametric study of some of the key variables of the mode! has been performed. Crack growth tests have been performed to give crack growth data for the fiber-metal-laminates and for the metal sheet material, used in the fiber metal larninates. The idée is to compare fibermetal-laminates with metal sheet material with respect to the crack growth rate - stress intensity range relation. The experimental results show that the model seems to overestimate the stress intensity range for test conditions having a high mean stress in the aluminum layers. For the load range used, a high average stress in the aluminum layers also leads to larger delaminations. Any individual change of the key parameters investigated, cannot shift the calculated effective stress intensity range for the fiber-metal-laminates so that the experimental crack growth data fit the crack growth data of the non-reinforced aluminum.
Even if the model overestimates the effective stress intensity range for some test conditions, the model succeeds to describe the overall crack growth behavior of fiber-metal-laminates.
stress intensity factor, fiber-metal-laminate, crack growth, delamination
Engineering and Technology
IdentifiersURN: urn:nbn:se:liu:diva-88096OAI: oai:DiVA.org:liu-88096DiVA: diva2:601720