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THE CONCLUSION

In this dissertational work the design procedure of non-uniform physically nonlinear thin-wall spatial designs of a variable thickness has received development. According to the spent researches following conclusions are formulated:

1.

The analysis and ordering of experimental data and results of scientific researches of non-uniform materials, methods of creation of technological heterogeneity and ways of the mathematical description of behaviour of non-uniform designs have allowed to receive analytical dependences for the heterogeneity functions, describing change prochnostnyh material characteristics in a non-uniform layer on a thickness of a design;

2. For numerical realisation improved inkrementalnoj a mathematical model of calculation of non-uniform designs of a variable thickness in aggregate with the offered technique of application of a method of the quickest descent for the decision of nonlinear problems and algorithm of construction of initial approach the software is developed for definition of parametres of the is intense-deformed condition of non-uniform physically nonlinear flat envelopments, plates and girders of a variable thickness at various variants of the initial given and boundary conditions;

3. Use of a developed technique and the software has allowed to make the analysis of effects caused by presence of physical nonlinearity and heterogeneity of a material and a variable thickness and on the basis of the received results is revealed, that presence of layers of heterogeneity on a thickness of a thin-wall design and a variable thickness leads to essential change of parametres of the is intense-deformed condition of thin-wall designs, at their bending down, under the influence of a lateral load;

4. The developed algorithm of calculation and the software are applicable for calculation of non-uniform physically nonlinear flat envelopments, plates and girders of a variable thickness of the rectangular form and a rectangular cross-section (for girders) under various boundary conditions, at various sorts of function of heterogeneity and function of a variable thickness;

5. On the basis of the spent researches of influence of factors of heterogeneity of a material and a variable thickness on intense - the state of strain of considered designs is revealed, that, presence of layers of heterogeneity on a thickness of thin-wall designs and a variable thickness, gives the chance the directed regulation by the is intense-deformed condition of a design. A prominent aspect is that in the presence of heterogeneity or a variable thickness, the design to it adapts. And this fact allows ekzoskeleta to use by creation in load-carrying structures new modern materials with low prochnostnymi characteristics, but with high warmly - both sound insulating properties, and small weight.

Recommendations and prospects of the further working out of a theme of the dissertation. The offered design procedure can be considered as the additional tool of the designer for optimisation of designs. At a structural engineering it is recommended to develop designs with the operated technological heterogeneity including both variable geometrical characteristics, and the strengthened surface layers as the given aspect leads to considerable economic benefit at the expense of reduction materialoemkosti.

Researches can be continued in a direction of development of the offered technique at calculation of geometrically nonlinear problems, physically and geometrically nonlinear problems and the account of constructive nonlinearity.

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A source: MISHCHENKO Roman Viktorovich. CALCULATION of NON-UNIFORM PHYSICALLY NONLINEAR THIN-WALL SPATIAL DESIGNS of the VARIABLE THICKNESS. The DISSERTATION on competition of a scientific degree of a Cand.Tech.Sci. Saratov - 2018. 2018

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