Materials physics and mechanics

RAR RUS 1-17 Peter the Great St. Petersburg Polytechnic University Melker A.I.

St.Petersburg, Russia

Peter the Great St. Petersburg Polytechnic University Krupina

St.Petersburg, Russia

Unified approach to forming fullerenes and nanotubes Reactions of elementary fullerenes (from C4 to C12) with each other as well as with their heirs are considered. Under the elementary fullerenes we understand a tetrahedron, a cube, and triangular, pentagonal and hexagonal prisms. The process is similar to fusion of bubbles in a soap solution. The graphs describing the process are suggested. The reaction zone is a vertexconnected subgraph that takes into account physical restrictions, namely that covalent bonds exist only between nearest-neighbor atoms. We supposed that during the reactions new covalent bonds are formed and old covalent bonds between the reacting atoms are destroyed. The clusters obtained resemble both fullerenes and nanotubes. 10.18720/MPM.3412017_1 fullerene fusion graph growth nanotube https://mpm.spbstu.ru/article/2017.58.1/ MPM134_01_melker.pdf

RAR RUS 18-28 Peter the Great St. Petersburg Polytechnic University Melker A.I.

St.Petersburg, Russia

Peter the Great St. Petersburg Polytechnic University Krupina

St.Petersburg, Russia

Modeling growth of midi-fullerenes from C20 to C60 Axonometric projections together with corresponding graphs for the first branch of the family of tetra-hexa-cell equator fullerenes including some isomers are constructed in the range from 20 to 60. Some of graphs were obtained earlier but the majority is given for the first time. A unified approach for drawing axonometric projections of these fullerenes is used; namely, it is the dimetric representation which symmetry coincides with that of a corresponding graph. The growth of fullerenes is studied on the basis of two mechanisms, according to which a carbon dimer embeds either in a hexagon or a pentagon of an initial fullerene. This leads to stretching and breaking the covalent bonds which are parallel to arising tensile forces. In both cases there arises a new atomic configuration and there is mass increase of two carbon atoms. We considered direct descendents of the first branch of the tetra-hexa-cell equator family beginning with C20; namely C22, C24, C26, C28, C30, C32, C34, C36, C38, C40, C42, C44, C46, C48, C50, C52, C54, C56, C58, and C60. 10.18720/MPM.3412017_2 carbon dimer fullerene graph structure https://mpm.spbstu.ru/article/2017.58.2/ MPM134_02_melker.pdf

RAR RUS 29-36 Peter the Great St. Petersburg Polytechnic University Melker A.I.

St.Petersburg, Russia

Peter the Great St. Petersburg Polytechnic University Krupina

St.Petersburg, Russia

Modeling growth of midi-fullerenes from C48 to C72 Axonometric projections together with corresponding graphs for tetra-hexa-cellequator fullerenes are constructed in the range from 48 to 72. A unified approach for drawing axonometric projections of the fullerenes was used. The process of growth of fullerenes is studied on the basis of the mechanism, according to which a carbon dimer embeds in a hexagon of an initial fullerene. As a result, there arises a new atomic configuration and there is mass increase of two carbon atoms. We obtained direct descendents of the fifth branch of tetra-hexa-cell-equator family which begins with C48; namely C50, C52, C54, C56, C58, C60, C62, C64, C66, C68, C70, and C72. Among them only three fullerenes, C48, C60 and C72 are highly symmetric. The symmetry can be easily discovered looking at their graphs. On the basis of this study, as well as previous investigations the periodic system of fullerenes is suggested. 10.18720/MPM.3412017_3 carbon dimer fullerene graph modeling structure https://mpm.spbstu.ru/article/2017.58.3/ MPM134_03_melker.pdf

RAR RUS 37-45 Peter the Great St. Petersburg Polytechnic University Melker A.I.

St.Petersburg, Russia

Peter the Great St. Petersburg Polytechnic University Krupina

St.Petersburg, Russia

Peter the Great St. Petersburg Polytechnic University Zarafutdinov

St.Petersburg, Russia

Fullerenes of the Δ n=10 series Fusion reactions of cupola half-fullerenes C10, C12, C16, C18, C20, C24, C30 and C36 with each other are considered on the basis of Arrhenius.s postulate. It means that at first there forms an intermediate compound and only afterwards a usual chemical reaction is going on. The final structure of fullerenes is obtained with the help of geometric modeling and is optimized through the use of Avogadro package. In general, the fullerenes which tend to take the appearance of a perfect spheroid have lesser formation energy. However, in some case selforganization of unshared electron pairs prevails. The energy of fullerenes C26, C30, C40, C50 and C60 obtained is calculated and is explained in the context of strain-related stability as well as in the framework of interaction of electron valence pairs. 10.18720/MPM.3412017_4 cluster cupola energy fullerene fusion modeling. https://mpm.spbstu.ru/article/2017.58.4/ MPM134_04_melker.pdf

RAR RUS 46-50 Peter the Great St. Petersburg Polytechnic University Melker A.I.

St.Petersburg, Russia

Peter the Great St. Petersburg Polytechnic University Krupina

St.Petersburg, Russia

Peter the Great St. Petersburg Polytechnic University Zarafutdinov

St.Petersburg, Russia

Fullerenes of the Δ n=12 series Fusion reactions of cupola half-fullerenes C16, C18, C24, C30 and C36 with each other are considered on the basis of Arrhenius's postulate. It means that at first there forms an intermediate compound and only afterwards a usual chemical reaction is going on. The final structure of fullerenes is obtained with the help of geometric modeling and is optimized through the use of Avogadro package. In general, the fullerenes which tend to take the appearance of a perfect spheroid have lesser formation energy. The energy of fullerenes C32, C36, C48, C60 and C72 obtained is calculated. The periodic system of basic perfect fullerenes is suggested. 10.18720/MPM.3412017_5 cluster cupola energy fullerene fusion modeling https://mpm.spbstu.ru/article/2017.58.5/ MPM134_05_melker.pdf

RAR RUS 51-58 Peter the Great St. Petersburg Polytechnic University Romashkina (Zobacheva)

St.Petersburg, Russia

Peter the Great St. Petersburg Polytechnic University Nemov Alexander

St.Petersburg, Russia

Peter the Great St. Petersburg Polytechnic University Borovkov A.I.

St.Petersburg, Russia

Peter the Great St. Petersburg Polytechnic University Novokshenov

St.Petersburg, Russia

Peter the Great St. Petersburg Polytechnic University Khovaiko

St.Petersburg, Russia

Peter the Great St. Petersburg Polytechnic University Ermolenko

St.Petersburg, Russia

Design and simulation of additive manufactured structures of three-component composite material Modeling the microstructure of a three-component composite material obtained by layer-by-layer 3D printing is presented. The effect of the microstructure parameters on mechanical characteristics of the composite material created by 3D printing is studied. On the basis of multiscale simulations, an optimal configuration of the plate of composite material is designed and manufactured by 3D printer. 10.18720/MPM.3412017_6 composite design finite element structure https://mpm.spbstu.ru/article/2017.58.6/ MPM134_06_zobacheva.pdf

RAR RUS 59-69 Tver State University Alekseev

Tver, Russia

Peter the Great St. Petersburg Polytechnic University Tarasov

St.Petersburg, Russia

Peter the Great St. Petersburg Polytechnic University Borovkov A.I.

St.Petersburg, Russia

Peter the Great St. Petersburg Polytechnic University Aleshin

St.Petersburg, Russia

Peter the Great St. Petersburg Polytechnic University Klyavin

St.Petersburg, Russia

Validation of EuroNCAP frontal impact of frame off-road vehicle: road traffic accident simulation The article is focused on the validation of the full-scale virtual model of a frame offroad vehicle. A high degree of coincidence with the real crash test according to EURONCAP rules is achieved. Modeling the processes of high-speed deformation and damage is a complex procedure, requiring a lot of input data parameters and large computing power. The special emphasis is placed on the ways to achieve the coincidence of the behavior of vehicle virtual elements with the behavior of car elements in the full-scale test. 10.18720/MPM.3412017_7 crash test deformation finite element validation vehicle https://mpm.spbstu.ru/article/2017.58.7/ MPM134_07_alekseev.pdf

RAR RUS 70-75 Peter the Great St. Petersburg Polytechnic University Patrikeev

St.Petersburg, Russia

Peter the Great St. Petersburg Polytechnic University Tarasov

St.Petersburg, Russia

Peter the Great St. Petersburg Polytechnic University Borovkov A.I.

St.Petersburg, Russia

Peter the Great St. Petersburg Polytechnic University Aleshin

St.Petersburg, Russia

Peter the Great St. Petersburg Polytechnic University Klyavin

St.Petersburg, Russia

NVH analysis of offroad vehicle frame. Evaluation of mutual influence of body-frame system components The article focuses on the basic NVH characteristics of a vehicle such as global static stiffness, eigenfrequencies and local dynamic stiffness. We built the Smart Digital Twin of serial SUV that allow reduce the time and costs of the design stage by reducing the number of real tests. The optimal target values of static stiffness for the Frame and BIW were selected to achieve the target static stiffness of the Trimmed body. 10.18720/MPM.3412017_8 finite element frame frequency stiffness vehicle https://mpm.spbstu.ru/article/2017.58.8/ MPM134_08_patrikeev.pdf

RAR RUS 76-81 Peter the Great St. Petersburg Polytechnic University Novokshenov

St.Petersburg, Russia

Peter the Great St. Petersburg Polytechnic University Nemov Alexander

St.Petersburg, Russia

Peter the Great St. Petersburg Polytechnic University Mamchits

St.Petersburg, Russia

Peter the Great St. Petersburg Polytechnic University Romashkina (Zobacheva)

St.Petersburg, Russia

Integrated system as a tool for implementation of simulation- and optimization-based design methodology Within the framework of the work, topology optimization program module and integrated computer-aided design and engineering system are developed. Topology optimization of bracket and parametric design optimization of space waffle shell were carried out through ISCDE. The obtained results will be used in the Russian space companies. 10.18720/MPM.3412017_9 design modeling space bracket topology optimization https://mpm.spbstu.ru/article/2017.58.9/ MPM134_09_novokshenov.pdf

RAR RUS 82-89 Compmechlab Ltd. Leoro

St.Petersburg, Russia

Peter the Great St. Petersburg Polytechnic University Krutitskiy

St.Petersburg, Russia

Peter the Great St. Petersburg Polytechnic University Tarasov

St.Petersburg, Russia

Peter the Great St. Petersburg Polytechnic University Borovkov A.I.

St.Petersburg, Russia

Peter the Great St. Petersburg Polytechnic University Aleshin

St.Petersburg, Russia

Peter the Great St. Petersburg Polytechnic University Klyavin

St.Petersburg, Russia

Vehicle dynamics prediction module In this contribution we used the vehicle dynamics for creation a vehicle motion prediction module for autopilot tasks. A Vehicle Dynamics Prediction Module (VDPM) was created as an application for self-driving hardware assistance for high velocities maneuvering (above 40km/h). The dynamic characteristics of a vehicle have a complex mathematical mechanism, but have a regularity character. This fact allows us to create a basis with a limited number of pre-calculated maneuvers to describe the behavior of the vehicle dynamics for maneuvering in public roads. 10.18720/MPM.3412017_10 dynamics modeling prediction trajectory vehicle https://mpm.spbstu.ru/article/2017.58.10/ MPM134_10_leoro.pdf

RAR RUS 90-96 Peter the Great St. Petersburg Polytechnic University Lebedev

St.Petersburg, Russia

Peter the Great St. Petersburg Polytechnic University Okunev

St.Petersburg, Russia

Peter the Great St. Petersburg Polytechnic University Aleshin

St.Petersburg, Russia

Peter the Great St. Petersburg Polytechnic University Ivanov

St.Petersburg, Russia

Peter the Great St. Petersburg Polytechnic University Klyavin

St.Petersburg, Russia

Peter the Great St. Petersburg Polytechnic University Nikulina

St.Petersburg, Russia

Peter the Great St. Petersburg Polytechnic University Rozhdestvenskiy

St.Petersburg, Russia

Peter the Great St. Petersburg Polytechnic University Borovkov A.I.

St.Petersburg, Russia

Applicability of polymer composite materials in the development of tractor falling-object protective structures (FOPS) Analysis of application efficiency of polymer composite materials (PCM) in the development of tractors falling-object protective structures with the use of finite element method and modern systems of engineering analysis (CAE) is done. An elasticity and fracture model of composite materials is developed. A series of virtual crash tests of the tractor cab is carried for both cases with and without PCM. On the basis of this research, a methodology of designing PCM roofs for tractor cabs is developed. 10.18720/MPM.3412017_11 composite material crash test design finite element model tractor cab https://mpm.spbstu.ru/article/2017.58.11/ MPM134_11_lebedev.pdf

RAR RUS 97-102 Peter the Great St. Petersburg Polytechnic University Antonova

St.Petersburg, Russia

Peter the Great St. Petersburg Polytechnic University Borovkov A.I.

St.Petersburg, Russia

Peter the Great St. Petersburg Polytechnic University Boldyrev

St.Petersburg, Russia

Peter the Great St. Petersburg Polytechnic University Voynov

St.Petersburg, Russia

Variational problem for hydrogenerator thrust bearing Reversible and irreversible heavy loaded thrust bearings of a hydrogenerator are investigated. The problem of oil wedge microgeometry profiling for load capacity optimization is considered. The analysis is based on optimization methods using variational calculus. The results of oil wedge microgeometry optimization for reversible and irreversible thrust bearings are presented. 10.18720/MPM.3412017_12 hydrogenerator load capacity optimization thrust bearing https://mpm.spbstu.ru/article/2017.58.12/ MPM134_12_antonova.pdf