scholarly journals Investigation of the Stress-Strain State of a Wheel Flange of the Locomotive by the Method of Finite Element Modeling

Mechanika ◽  
2018 ◽  
Vol 24 (2) ◽  
Author(s):  
Kenes Zhussupov ◽  
Aliya Toktamyssova ◽  
Seidulla Abdullayev ◽  
Gabit Bakyt ◽  
Manarbek Yessengaliyev
Keyword(s):  
Finite Element ◽  
Finite Element Modeling ◽  
Strain State ◽  
Stress Strain ◽  
Element Modeling ◽  
Stress Strain State

scholarly journals Finite element modeling of the stress-strain state of waxy compacts

2019 ◽  
Author(s):  
A. A. Sosnin ◽  
N. A. Bogdanova ◽  
S. G. Zhilin ◽  
O. N. Komarov
Keyword(s):  
Finite Element ◽  
Finite Element Modeling ◽  
Strain State ◽  
Stress Strain ◽  
Element Modeling ◽  
Stress Strain State

scholarly journals Plastic Folding of Bar Stocks of Round and Barrel-Shaped Sections

2022 ◽  
Author(s):  
O.S. Zhelezkov
Keyword(s):  
Finite Element ◽  
Finite Element Modeling ◽  
Cross Sections ◽  
Deformation Process ◽  
Strain State ◽  
Stress Strain ◽  
Plastic Bending ◽  
Bending Angle ◽  
Element Modeling ◽  
Stress Strain State

Abstract. Research has been carried out on the process of plastic folding of bar stocks with round and barrel-shaped cross-sections. The dependence of the movement of the movable tool on the bending angle has been established. The force parameters of the deformation process and the stress-strain state in the bending workpiece are determined based on the results of finite element modeling of plastic bending.

scholarly journals Stress-strain state finite element modeling of concrete foundation of a multistory brick building

2021 ◽  
Vol 23 (2) ◽  
pp. 118-132
Author(s):  
S. V. Yushchube ◽  
I. I. Podshivalov
Keyword(s):  
Finite Element ◽  
Finite Element Modeling ◽  
Strain State ◽  
Strength Analysis ◽  
Cross Wall ◽  
Soil Behavior ◽  
Stress Strain ◽  
Element Modeling ◽  
Concrete Foundation ◽  
Stress Strain State

The determination of mobility of the concrete foundation on a natural subgrade is rather relevant for the strength analysis of multistory brick buildings with a spatial cross-wall structural system. During the inelastic soil behavior, its ultimate limit and elastoplastic states are allowable along the concrete foundation perimeter, the bearing capacity of the foundation being provided as a whole. In this case, it is important to adhere to the standard conditions of the foundation deformation and mobility. The finite element modeling of the stress-strain state of the concrete foundation and the building superstructure of the base-foundation-building system is performed in the MicroFe software package. A consideration of inelastic soil deformations in the natural subgrade results in unacceptable displacements of the concrete foundation.

scholarly journals Stress-strain state finite element modeling of concrete foundation along the concrete pile perimeter of a multistory brick building

2021 ◽  
Vol 23 (3) ◽  
pp. 155-166
Author(s):  
S. V. Yushchube ◽  
I. I. Podshivalov
Keyword(s):  
Finite Element ◽  
Finite Element Modeling ◽  
Strain State ◽  
Soil Deformation ◽  
Stress Strain ◽  
Element Modeling ◽  
Concrete Piles ◽  
Concrete Foundation ◽  
Piled Raft Foundation ◽  
Ultimate Limit

The use of concrete foundations on a natural subgrade of brick buildings with a spatial cross-wall structural system can lead to its ultimate limit and elastoplastic states along the perimeter and, as a consequence, unallowable soil deformation and movement. The paper proposes to eliminate ultimate limit and elastoplastic states along the perimeter of concrete piles through the replacement of the foundation slab by the combined piled-raft foundation. The finite element modeling of the stress-strain state of the concrete foundation and the building superstructure of the base-foundation-building system is performed in the MicroFe software package allowing to appropriately estimate this state in real geotechnical conditions. According to calculations, 46 % of the vertical load of the building is taken by concrete piles along the perimeter, and 54 % of this load is taken by the concrete foundation. The use of the combined piled-raft foundation allows eliminating unallowable soil deformation of the foundation and provides meeting the standard requirements.

scholarly journals The problem of mathematical finite element modeling of inhomogeneous deformable solids using scanning

2019 ◽  
Vol 19 (3) ◽  
pp. 281-289
Author(s):  
V. L. Duong
Keyword(s):  
Finite Element ◽  
Finite Element Modeling ◽  
Strain State ◽  
Mechanical Characteristics ◽  
Finite Element Models ◽  
Mathematical Methods ◽  
Stress Strain ◽  
Computer Tomograph ◽  
Element Modeling ◽  
Deformable Solids

Introduction. In the mathematical finite element modeling, an average value of the mechanical characteristics of the deformable solid material is used. In aircraft, machine building, construction engineering, medicine and other fields, polymer composite materials and materials of natural origin are increasingly used. In the latter case, the actual change in the mechanical characteristics differs significantly from the averaged change; therefore, when using the averaged parameters to build and analyze finite element models, the results can be significantly distorted. This paper describes the creation of mathematical methods for studying changes in the mechanical characteristics of a material of inhomogeneous deformable solids. The results obtained in this way are used to construct finite element models and analyze their stress-strain state.Materials and Methods. Naturally occurring materials and composites are considered as inhomogeneous deformable solids. To study the changes in the mechanical characteristics of the material, a method was developed based on the use of two components: the pixel characteristics of raster images scanned by a computer tomograph and the experimental data of field tests of standard samples.Research Results. A complex of mathematical methods has been developed for modeling the interpretation of scanning raster images by a computer tomograph, which allows for the study of any complicated structures of real deformable solids. The results are used in the construction of finite element models of such bodies considering the heterogeneity of the mechanical characteristics of the material. The analysis of the stress-strain state of finite element models of test samples has proved the accuracy and convergence of the numerical solution of the finite element method in modeling the property of heterogeneity of the mechanical characteristics of the material.Discussion and Conclusions. The developed approach can be applied to any physical principles of scanning (X-ray, ultrasound, laser, etc.) and for any types of materials if the data obtained as a result of scanning is developed in the form of a digital (raster) image.

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.

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