Stepwise Optimization of I-section Flexible Elements Under a Fuzzy Approach to Taking into Account Corrosion and Protective Properties of Anticorrosive Coating
Journal Title: Проблеми машинобудування - Year 2018, Vol 21, Issue 3
Abstract
This paper is a continuation of research in the field of optimal design of structures under a combined approach to the measurement of corrosion and anticorrosion protective properties of coatings. As noted earlier, such coatings are barrier layers that impede the penetration of aggressive media to the surface of a structure and delay the onset of the process of intense corrosion. In this case, it is important to take into account not only the corrosive effect on the structure, but also be able to estimate the period of time for which the anticorrosive coating loses its protective properties. Since structural elements with damaged protective coatings are able to continue to be subjected to current loads over a considerable period of time, their accelerated corrosion wear is to be taken into account in the damaged areas of coatings. Consequently, the work of the structures protected by coatings consists of two periods: with a protective coating (during which the coating loses protective properties and collapses) and with a damaged protective coating (when there is a severe corrosion wear of unprotected structural areas). The model proposed in the previous study (and implemented on the example of optimization of the flexible elements of a rectangular beam) allows taking into account the smooth transition of the work of structures with protective coatings and the time when the protective properties of anticorrosive coatings practically do not work. This paper considers a solution to a more complicated (due to its multi-extremity) problem of optimization (finding the optimal form) of I-section (double-T) flexible structural elements under a fuzzy approach to taking into account corrosion and anticorrosive coating protective properties.
Authors and Affiliations
Mark Fridman
Keywords
Related Articles
- EP ID EP622094
- DOI 10.15407/pmach2018.03.058
- Views 53
- Downloads 0
Minimization of the Stressed State of a Stringer Plate with a Hole and Rectilinear Cracks
As is known, thin plates with holes are one of the most common structural ele-ments. To increase their reliability and service life, it is of interest to find such a hole contour that ensures the minimum circumferential...
Modeling of partial closure of slots system in perforated isotropic medium reinforced by stringers
On the basis of the methods of the theory of elasticity, a mathematical description of the model of partial closure of a system of slits in a perforated isotropic medium with foreign transverse inclusions is given. Such...
Aeroelastic behaviour of the turbine blade row in 3D viscous flow
<p class="a"><span lang="EN-US">This paper presents the results of a numerical analysis of the aeroelastic behaviour of the oscillating blade row of a turbine stage in the 3D flow of viscous gas, taking into account the...
Calculation of Indicators of Reliability of Technical Systems by the Typical Structural Scheme Method
A method for calculating the indicators of structural reliability of systems with a large number of elements is presented. The method is based on the use of typical structural schemes, reflecting the concept of connectio...
Study of the Stressed State Near the Crack That Initiates at the Inclusion Under Longitudinal Shift Wave Influence
Modern elements of building structures and machine parts often contain structural elements or technological defects that can be considered as thin inclusions of high rigidity. Reinforcing elements of composite materials...