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Imeni Vladimira Il'icha Lenina, Russia

Mokritskii B.Y.,Komsomolsk-on-Amur State Technical University
Chemical and Petroleum Engineering | Year: 2014

Several examples are cited for use of modern materials employed for machining of materials typical of chemical machine building. The feasibility of controlling the serviceability of the tool due to proper selection of its material is indicated. © 2014 Springer Science+Business Media New York. Source

Pogorelova A.V.,RAS Institute of Metallurgy | Kozin V.M.,Komsomolsk-on-Amur State Technical University
Journal of Applied Mechanics and Technical Physics | Year: 2014

A straightline unsteady motion of a load over a floating elastic sheet in a pool whose depth changes in the direction of load motion is studied. The influence of the pool depth, sheet thickness, load size and intensity, and velocity of uniform motion on the amplitude and maximum deflection of the sheet is analyzed. © 2014 Pleiades Publishing, Ltd. Source

Oleinikov A.I.,Komsomolsk-on-Amur State Technical University
Key Engineering Materials | Year: 2013

Problems of inelastic straining of three-dimensional bodies with large displacements and rotations are considered. In addition to the sought fields, surface forces and boundary displacements, original size and shape have also to be determined from specified residual displacements in these problems. Currently, forming of light metals poses tremendous challenges due to their low ductility at room temperature and their unusual deformation characteristics at hotcold work: strong asymmetry between tensile and compressive behavior, and a very pronounced anisotropy. We proposed the constitutive models of steady-state creep of initially transverse isotropy structural materials the kind of the stress state has influence [1]. The forming process considered includes two stages: active stage of elastoviscoplastic straining of the blank in the die tooling and passive stage of unloading of the blank withdrawn from the die tooling. The final stressstrain state at the active stage is the initial state for the passive stage. Unloading is considered as purely elastic straining, with no increments of inelastic strains. The active stage, in turn, also includes two steps. At the first step, the frontal faces of the "cold" blank are pressed to the working surfaces of the die tooling, which results in elastoplastic straining of the blank. The second step includes the processes of stress relaxation and creep strain in the blank fixed in this die tooling during a given time at an elevated ageing temperature. Computer modeling of these forming processes involves the use of the finite element method for consecutive solutions of threedimensional quasi-static problems of elastoplastic straining, relaxation, and unloading, and also determining boundary conditions from given residual displacements [2] . The paper gives basics of the developed computer-aided system of design, modeling, and electronic simulation targeting the processes of manufacture of wing integral panels. System application data resulting from computation of 3D-involute of a CAD-based panel model, determination of working surfaces of die tooling, three-dimensional analysis of stresses, and simulation of panel shaping under diverse thermo-mechanical and speed conditions are demonstrated. Modeling of forming of wing panels of the SSJ-100 aircraft are considered [2,3]. The modeling results can be used to calculate the die tooling, determine the panel processibility, and control panel rejection in the course of forming [3]. Copyright © 2013 Trans Tech Publications Ltd. Source

Husainov A.A.,Komsomolsk-on-Amur State Technical University
The Scientific World Journal | Year: 2013

This paper is devoted to connections between trace monoids and cubical sets. We prove that the category of trace monoids is isomorphic to the category of generalized tori and it is a reflective subcategory of the category of cubical sets. Adjoint functors between the categories of cubical sets and trace monoid actions are constructed. These functors carry independence preserving morphisms in the independence preserving morphisms. This allows us to build adjoint functors between the category of weak asynchronous systems and the category of higher dimensional automata. © 2013 Ahmet A. Husainov. Source

Frolov A.V.,Komsomolsk-on-Amur State Technical University
Steel in Translation | Year: 2013

The influence of the residence time of 30XΓCA and P18 steel and also VT20 titanium alloy in conditions of polymorphous austenitic and bainitic pretransformation and transformation on their mechanical properties is investigated. The results show that phase transformations permit regulation of alloy structure and properties over a broad range (from properties typical of the quenched state to those of tempered metal). By working at the boundary of polymorphous transformation, the density of the defect structure may be equalized, and the mechanical properties of the alloys may be optimized. Acoustic emission may be used to determine the stage of phase transformation. On that basis, heat treatment that permits the most effective use of the phase transformation is developed. © 2013 Allerton Press, Inc. Source

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