β Scribed by C.D. Rans; R.C. Alderliesten; R. Benedictus
No coin nor oath required. For personal study only.
A robust crack growth prediction tool has been developed for a class of hybrid skin materials known as Fibre Metal Laminates (FMLs) which has been thoroughly validated for fatigue loading cases at room temperature. This paper provides a brief overview of this predictive model and presents an investigation into its predictive capabilities at various temperatures. Amongst the temperature effects investigated are crack growth rate in the metal layers, delamination growth rate along the metal-fibre interfaces, and residual curing stresses within the laminate. Results from this investigation indicate that the present model accounting for these effects can accurately predict crack growth in FMLs at room temperature and elevated temperature, but is overly conservative for predictions at low temperatures.
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This paper discusses the meaning of threshold fatigue for fibre metal laminates under constant amplitude loading. A few experiments have been performed and the results are discussed in this paper.