Aerospace Instrument-Making Annotation << Back Mathematical model for forecasting of the residual resource of the hermetical elements of the constructions with cracks В.Ф. Деревенских, Б.В. Беляев, Н.Н. Наркевич Here is represented a mathematical model, which allows to forecast the residual resource of elements of hermetical constructions with through cracks. The model includes expressions, that describe regularities of change of leakage of an actuating medium through through cracks in dependence from their changing geometry, the one-parametric equation of Paris for the description of the growth rate of a fatigue crack and also equations, taking into account the manifestation of the effect of short crackes, that are characteristic for thin-wall elements of constructions