Aerospace Instrument-Making Annotation << Back Mathematical model for evaluation of capacity for work of elements of hermetic constructions with superficial cracks V.F. Derevenskih, E.D. Romashev, B.V. Belyaev, T.S. Khublarova The mathematical model, permissive to evaluate efficient condition hermetic elements of construction at the stage of superficial cracks spreading is developed. Model includes the one-parametrical equation of Paris for the description of growth rate of a fatigue crack, modified equation of Elber to account for the crack closure degree in dependence of asymmetry coefficient of cycle loading, and also equation which takes into account both dynamics of configuration change of the superficial crack in the isotropic and anisotropic constructional materials and manifestation of small cracks effect that are typical for the thin-walled construction elements.