Ryabokon’ S. Elastoplastic deformation of structural elements of plate with holes

The technique of the solution for problems elastoplastic deformations of such structural elements which based on use by means of a method of variable elastic parameters or a method of additional loadings for investigated problems to sequence of non-uniform problems of elasticity theory is offered. Variation statement of problems is used. Solutions for non-uniform problems of the elasticity theory it is spent by the developed projective-iterative schemes of finite element method realization. Calculations are made on sequence uniform and adaptive grids. A number of problems elastoplastic deformations of plates with one or two holes of the various form (rectangular, circular, elliptic) is investigated. For some problems comparison of the found numerical solutions with known analytical and numerical solutions is developed. Comparison of accuracy of calculation (value of movings and stresses) and time of the account for the personal computer at use traditional finite element method and projective-iterative schemes of realization finite element method at the solution of corresponding problems, has shown advantages of the last. The developed technique is introduced in practice of calculation tower constructions, namely сhimneys.