Optimization of Aviation Shassis Parts Construction Based on Stress Stiffness Criterion

Abstract

At present moment in the typical strength calculations the analysis of the stress-strain state on the basis of equivalent stress and the theories of durability is used for diagnostics of parts. However a number of the basic aviation parts are working at cyclically repeated loadings are exposed to loadings and deformation in the field of a low and high cycle fatigue. In this case there is a need of the calculations of deformation conditions or the stress-strain type which significantly influence on the cyclic durability of parts. In the bound of this research was shown the necessity to use the parameter of the stress state stiffness, which was determined by the G. A. Smirnov-Alyaev criterion for strength calculating of the most loaded parts. The method for estimating of the level of tension of parts and diagnostic of the most critical zones of parts, based on dimensionless energy and complex criteria, is proposed. The effectiveness of the method, which can be used not only to diagnose critical zones, but also to optimize the geometric parameters of the design of critical parts, is shown.