Investigation of the microelectrochemical heterogeneity of metal structure

1972 ◽  
Vol 5 (3) ◽  
pp. 218-222
Author(s):  
G. V. Karpenko ◽  
E. M. Gutman ◽  
I. E. Samostyanik ◽  
L. M. Gavrilenko
Keyword(s):  
Metal Structure ◽  
Microelectrochemical Heterogeneity

КОНСТРУКТИВНО-ТЕХНОЛОГІЧНІ ОСОБЛИВОСТІ ХВОСТО-ВИХ БАЛОК СІТЧАСТОГО ТИПУ З ПОЛІМЕРНИХ КОМПО-ЗИЦІЙНИХ МАТЕРІАЛІВ ВЕРТОЛЬОТІВ ТРАНСПОРТНОЇ КАТЕГОРІЇ

2020 ◽  
pp. 15-30
Author(s):  
А. Г. Гребеников ◽  
И. В. Малков ◽  
В. А. Урбанович ◽  
Н. И. Москаленко ◽  
Д. С. Колодийчик
Keyword(s):  
Finite Element ◽  
Strain State ◽  
Layer Structure ◽  
Metal Structure ◽  
Element Model ◽  
Stress Strain ◽  
Element Analysis ◽  
Mesh Structure ◽  
Stress Strain State ◽  
Mesh Structures

The analysis of the design and technological features of the tail boom (ТB) of a helicopter made of polymer composite materials (PCM) is carried out.Three structural and technological concepts are distinguished - semi-monocoque (reinforced metal structure), monocoque (three-layer structure) and mesh-type structure. The high weight and economic efficiency of mesh structures is shown, which allows them to be used in aerospace engineering. The physicomechanical characteristics of the network structures are estimated and their uniqueness is shown. The use of mesh structures can reduce the weight of the product by a factor of two or more.The stress-strain state (SSS) of the proposed tail boom design is determined. The analysis of methods for calculating the characteristics of the total SSS of conical mesh shells is carried out. The design of the tail boom is presented, the design diagram of the tail boom of the transport category rotorcraft is developed. A finite element model was created using the Siemens NX 7.5 system. The calculation of the stress-strain state (SSS) of the HC of the helicopter was carried out on the basis of the developed structural scheme using the Advanced Simulation module of the Siemens NX 7.5 system. The main zones of probable fatigue failure of tail booms are determined. Finite Element Analysis (FEA) provides a theoretical basis for design decisions.Shown is the effect of the type of technological process selected for the production of the tail boom on the strength of the HB structure. The stability of the characteristics of the PCM tail boom largely depends on the extent to which its design is suitable for the use of mechanized and automated production processes.A method for the manufacture of a helicopter tail boom from PCM by the automated winding method is proposed. A variant of computer modeling of the tail boom of a mesh structure made of PCM is shown.The automated winding technology can be recommended for implementation in the design of the composite tail boom of the Mi-2 and Mi-8 helicopters.

Refinement of metal structure in arc surfacing under the effect of longitudinal magnetic field

2019 ◽  
Vol 2019 (2) ◽  
pp. 19-21
Author(s):  
A.D. Razmyshlyaev ◽  
◽  
M.V. Ageeva ◽  
E.V. Lavrova ◽  
◽  
...  
Keyword(s):  
Magnetic Field ◽  
Longitudinal Magnetic Field ◽  
Metal Structure

Modernization of the Metal Structure of the Grader Working Equipment

2020 ◽  
Vol 14 (1) ◽  
pp. 1
Author(s):  
Mikhail Doudkin ◽  
Alina Kim ◽  
Andrey Savelyev ◽  
Mikhail Zhileikin ◽  
Vladimir Gribb ◽  
...  
Keyword(s):  
Metal Structure

Modeling the Dynamic Load of Loader Cranes Metal Structure with Excessive Backlashes in Sections Hinge Joints

2018 ◽  
Vol 12 (2) ◽  
pp. 176
Author(s):  
Alexander V. Lagerev ◽  
Igor A. Lagerev
Keyword(s):  
Dynamic Load ◽  
Metal Structure

Reconfigurable optical rectangular particle array absorber based on metal–DNA–metal​ structure as a refractive index sensor and optical switch

2021 ◽  
Vol 489 ◽  
pp. 126866
Author(s):  
Shima Poorgholam-Khanjari ◽  
Zahra Razavi ◽  
Ferdows B. Zarrabi
Keyword(s):  
Refractive Index ◽  
Optical Switch ◽  
Metal Structure ◽  
Refractive Index Sensor ◽  
Particle Array

Reconfigurable terahertz Vivaldi antenna based on a hybrid graphene‐metal structure

2020 ◽  
Vol 30 (5) ◽  
Author(s):  
Jiangliang Jin ◽  
Zhiqun Cheng ◽  
Jin Chen ◽  
Tao Zhou ◽  
Chunlin Wu ◽  
...  
Keyword(s):  
Metal Structure ◽  
Vivaldi Antenna

scholarly journals Probable Ways of Hardening in the Metal Structure Obtained by Selective Laser Melting Technology

2021 ◽  
Vol 1079 (3) ◽  
pp. 032042
Author(s):  
V I Alekseev ◽  
B K Barahtin ◽  
A S Zhukov ◽  
G A Panova ◽  
S G Petrova ◽  
...  
Keyword(s):  
Selective Laser Melting ◽  
Metal Structure ◽  
Laser Melting ◽  
Melting Technology
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