The state is tense near closely located holes in anisotropic plates

Наведено алгоритм дослідження напруженого стану анізотропних пластинок, послаблених близько розміщеними отворами. Алгоритм ґрунтується на сумісному використанні методу інтегральних рівнянь та асимптотичних методів. На прикладах показано ефективність алгоритму.The algorithm of research of the tense state of anisotropic plates, weakened the close placed holes is resulted in the article. Algorithm are obtained on the compatible use of method of integral equalizations and asymptotic methods. On examples efficiency of algorithm is shown

Fatigue crack path and crack growth rate in plates: algorithm and program

Developed approach to finding of form of cracks and rate of distribution of tops of crack depending on the amount of cycles of loading, that is built on the method of surveillance, method of the integral evening and upshots to the type Grina. Influencing of size and directions of action of the external distributed loading or concentrated forces, placing, form of initial cracks is explored on the path of distribution of cracks and the rates fatigue cracks growth are expected

Bending of a plate with two equal symmetric cracks along a circular arch with allowance for the contact of their flanks

In this paper the problem of one-sided bend of a plate with two symmetric cracks along the arc of circle by bend moments on infinity including a contact of their sides in the presence of geometric and physical symmetry of a sum has been investigated. By virtue of contact of crack’s sides a task solution is given in the form of solution of two tasks: plane problem and bend (classical theory). Using complex potentials and methods of the theory complex variable quantity function, task solution has been reduced to linear conjugation, on the base of which the equation for finding the contact effort between crack’s sides is got. Evident forms for complex potentials, contact efforts between crack’s sides, coefficients of intensity efforts, moments are got for carrying out the numerical analysis, results of which are shown graphically