Structural designs

Complex changes in the fatigue resistance indices of constructions at applying of a strengthening technology

M. S. Torosyan, N.V. Pirumyan, M. G. Stakyan

National university of architecture and construction of Armenia

Abstract: Issues on increasing the fatigue resistance of the elements of the force diagrams of constructions subjected to surface plastic deformation (SPD) of their working surfaces and transfer sections are considered. The regression relations between the parameters of the acting factors and the fatigue resistance coefficients are revealed. Taking into account their interrelation, a nomogram is plotted, allowing to determine the optimal values of the remaining parameters by the calculating-graphical method at the presence of the proposed parameter (coefficient) of the prevailing factor. A detailed estimation of the fatigue resistance of the considered elements of the structure at different levels of stress concentration is introduced.

Keywords: surface plastic deformation, element construction, index of fatigue resistance, regression equation, multiparameter function, nomogram.

UDC: 621.785.2

Received: 17.04.2020
Accepted: 27.04.2020

Language: Armenian