Zobrazeno 1 - 10
of 63
pro vyhledávání: '"P. V. Yasnii"'
Publikováno v:
Materials Science. 56:461-465
We analyze the kinetic features and micromechanism of propagation of fatigue cracks in pseudoelastic nitinol alloy with shape-memory effect under the conditions of constant-amplitude cyclic loading with stress ratios R = 0.2 and 0.5. It is establishe
Publikováno v:
Materials Science. 56:188-194
The process of cold plastic deformation of a hole in a plate made of shape-memory alloy is simulated by the finite-element method by setting the mechanical characteristics and the temperatures of the onset and termination of direct and reverse phase
Publikováno v:
Materials Science. 50:877-881
A procedure of simulation of the stress–strain state in the case of mandrelling of the holes is developed on the basis of the finite-element method. We determine the basic regularities of the influence of the relative tension of mandrelling and the
Publikováno v:
Russian Engineering Research. 32:364-367
The propagation of an operational fatigue crack in the roller of a continuous-casting machine is analyzed. The degradation of the surface is determined by sclerometry. The fracture of 25Kh1M1F steel is investigated, and the influence of the operating
Publikováno v:
Materials Science. 47:224-235
The problems of engineering diagnostics of the state of rollers of continuous-casting machines are analyzed. We separately consider the problems of evaluation of the degradation of 25Kh1M1F steel (material of the rollers) after thermal cycling and es
Publikováno v:
Strength of Materials. 43:113-121
We present a procedure of prediction of the influence of warm prestressing combined with cycling on the brittle strength of steel 15Kh2MFA. Using a finite-element method, the effect of the combined warm prestressing on the stress-strain state at a fa
Publikováno v:
Materials Science. 46:425-429
The influence of irradiation in a transparent condensed medium on the impact toughness of heat-resistant steels is investigated. The irradiation of a specimen in front of a concentrator causes a substantial increase (up to a factor of two) in the imp
Publikováno v:
Strength of Materials. 42:32-37
A procedure for assessing the influence of combined warm prestressing on fracture toughness of heat-resistant steel is proposed, which is based on the stress-strain state analysis by the finite-element method (in the elastic-plastic statement) and on
Publikováno v:
Materials Science. 45:798-803
We develop an automated method for the quantitative analysis of a system of cracks aimed at the diagnostics of the state of rollers in the machines for continuous casting of blanks. A structural methodology of the identification of cracks is proposed
Publikováno v:
Materials Science. 45:291-298
We develop an automated coordinate-grid method (CGM) aimed at the evaluation of surface displacements and strains. Points of marking of the surface are used as bases. The principles of application of the CGM are described in detail. By using the prop