Тонкостенные пластины и оболочки с поверхностными дефектами в упругопластическом приближении

Abstract

In work [1] the decision directed by Dugdale’s statement for not through cracks in the thin plates which are under the influence o f a stretching and a bend has been received. In the present work the similar problem for not through (part-through) cracks is considered at a stretching, but taking into account influence o f displacement of a plastic zone at crack tops. The given decision is supplemented 5k - criterion of growth of a crack. The algorithm and computing procedure for its decision is constructed. Numerical results of the solution o f a task are received, ranges of definition of a limiting condition of a plate with scratch are constructed. The received areas give the chance an assessment and forecasting o f development of available superficial defects in a design, and also an assessment of bearing ability o f a design and possibility o f its further operation at operating operational loadings.