scholarly journals INFLUENCE ANALYSIS OF DESIGN SOLUTIONS OF UNDERGROUND PIPELINES CURVED SECTIONS ON THEIR STRESS-STRAIN STATE

2020 ◽  
pp. 73
Author(s):  
Z.Kh. Pavlova ◽  
A.D. Pavlova ◽  
Kh.A. Azmetov ◽  
M.A. Kharin
Keyword(s):  
Strain State ◽  
Stress Strain ◽  
Influence Analysis ◽  
Stress Strain State ◽  
Underground Pipelines ◽  
Design Solutions

scholarly journals Consideration of the loading of the traffic lines in the design of automobile roads

2021 ◽  
Vol 274 ◽  
pp. 02009
Author(s):  
Denis Nikolenko ◽  
Maxim Nikolenko ◽  
Anastasiya Filippova
Keyword(s):  
Traffic Flow ◽  
Strain State ◽  
Dynamic Deformation ◽  
Uneven Distribution ◽  
Stress Strain ◽  
Stress Strain State ◽  
Freight Traffic ◽  
Design Solutions ◽  
The Difference ◽  
Strength And Durability

The article focuses on the importance of the strength and durability of highways due to the projected increase in freight traffic. It also describes the consequences of uneven distribution of loads in traffic lanes, depending on the prevailing traffic in each lane. The studies, that were carried out earlier by various scientists, were taken into account, thankfully to which results were obtained on the composition of the traffic flow, the difference in the loading of road pavements, as well as the stress-strain state of road structures. As a result, a model that reflects the dependence of the influence of the speed of movement of vehicles on the dynamic deformation of structures, was developed. Consequently, a number of design solutions were established to ensure the required strength of all structures.

scholarly journals COMPARATIVE ANALYSIS OF STRESS DISTRIBUTION IN ELEMENTS OF DIFFERENT DESIGN OF HINGE JOINT OF SPHERICAL MECHANISM

2021 ◽  
pp. 59-61
Author(s):  
A. V. Popov ◽  
I. V. Notov ◽  
A. A. Rozhnov
Keyword(s):  
Comparative Analysis ◽  
Stress Distribution ◽  
Strain State ◽  
Stress Strain ◽  
Hinge Joint ◽  
Stress Strain State ◽  
Design Solutions ◽  
Spherical Mechanism

Results of simulation of stress-strain state of various design solutions of hinge of spherical converting mechanism for stepless drives are considered. Comparisons of hinge loading are given when using an intermediate bushing made of various materials and without it. Recommendations for designing such an element taking into account the peculiarities of the work are justified.

scholarly journals The numerical parametric study of the stress-strain state of I-beams having versatile corrugated webs

Vestnik MGSU ◽  
2021 ◽  
pp. 676-687
Author(s):  
Sergey G. Saiyan ◽  
Alexander G. Paushkin
Keyword(s):  
Numerical Model ◽  
Inclination Angle ◽  
Parametric Study ◽  
Software Package ◽  
Strain State ◽  
Stress Strain ◽  
Equivalent Stresses ◽  
Stress Strain State ◽  
Design Solutions ◽  
Numerical Parametric Study

Introduction. The numerical parametric study of the stress-strain state of I-beams, having versatile corrugated walls, was carried out in the ANSYS Mechanical APDL software package. Numerical results are obtained for displacements, equivalent stresses and stability coefficients depending on the change in the inclination angle of web corrugations for trapezoidal, wavy and triangular profiles. The obtained results can help to design and substantiate the design solutions applicable to bending elements. Materials and methods. The parametric study involved a series of numerical experiments conducted using the finite element method in the ANSYS Mechanical APDL software package. APDL parametric language was used to develop the software that was built into the software package. It allowed to perform a parametric reconstruction of the numerical model depending on varied parameters of the corrugated wall, and the reconstruction was followed by the numerical solution and post-processing of the calculation results. The calculations were made with the help of the model whose overall dimensions and material were identical to those of a standard I-beam having a solid wall exposed to a uniformly distributed transverse load. Results. The parametric study enabled the co-authors to identify the main features of the stress-strain state of the beams that had different types of corrugated walls. A parametric numerical model was compiled to determine maximum displacements, equivalent stresses and stability coefficients for various types of corrugated walls and various parameters of the corrugation angle. Isofields of equivalent stresses and buckling modes are provided for characteristic parameters and types of corrugations. The reliability of the obtained results was confirmed by the verification of the numerical model using the method of the strength of materials and corrugation inclination angle α = 0, which was the initial point of simulation for all types of corrugations. Conclusions. The results, obtained in the course of parametric studies, have identified the main features of the stress-strain state of beams having corrugated walls; they allow to substantiate their effectiveness as design solutions applied to bending elements.

Stress-Strain State of Weightless Inhomogeneous Array with Cylindrical Hole

2014 ◽  
Vol 919-921 ◽  
pp. 740-743 ◽  
Author(s):  
Vladimir I. Andreev
Keyword(s):  
Strain State ◽  
Cylindrical Hole ◽  
Local Inhomogeneity ◽  
Stress Strain ◽  
Stress Strain State ◽  
Underground Pipelines ◽  
Deformation Properties ◽  
Cylindrical Holes ◽  
Blasting Method

When creating underground pipelines, tunnels and other long cylindrical holes often used drilling-and-blasting method of penetration. Depending on the type of rock in the array may be local induration or sintering which results in increase in the deformation properties of the ground, or cracking resulting in a decrease in deformation properties. Thus the array becomes inhomogeneous. The article provides a calculation of the stress-strain state of array considering its local inhomogeneity.

scholarly journals Study of the seismodynamics of spatially located underground pipelines with a nodal connection of non-orthogonal configuration

2021 ◽  
Vol 264 ◽  
pp. 02005
Author(s):  
Ibrakhim Mirzaev ◽  
Ruslan Kishanov ◽  
Nodirakhon Mansurova ◽  
Nematilla Nishonov ◽  
Mars Berdibaev
Keyword(s):  
Strain State ◽  
Numerical Results ◽  
Seismic Load ◽  
Stress Strain ◽  
Stress Strain State ◽  
Underground Pipelines

The article deals with the seismodynamics of underground pipelines of various configurations under spatial seismic influences. The stress-strain state of spatially located underground pipelines of complex orthogonal configuration at different angles of seismic load incidence was determined. Several problems were solved by analyzing numerical results of the seismodynamics of underground pipelines of complex orthogonal and non-orthogonal configurations.

scholarly journals Non-contact method of estimation of stress-strain state of underground pipelines during transportation of oil and gas

2020 ◽  
Vol 109 ◽  
pp. 17-32
Author(s):  
Paweł DROŹDZIEL ◽  
Tetiana VITENKO ◽  
Liubomyr ZHOVTULIA ◽  
Andrii YAVORSKYI ◽  
Andrii OLIINYK ◽  
...  
Keyword(s):  
Strain State ◽  
Oil And Gas ◽  
Contact Method ◽  
Safe Operation ◽  
Underground Part ◽  
Stress Strain ◽  
Stress Strain State ◽  
Underground Pipelines ◽  
Set Of Points ◽  
Main Gas Pipeline

Development and implementation of contactless methods for determining the stress-strain state of pipelines in the process of transportation of energy hydrocarbons is important for ensuring its safe operation. The authors developed a method for determining the change in the stress-strain state of the underground part of the main oil and gas pipelines according to the data about the displacement of a certain set of points of the axis of the pipeline. This study was conducted on a linear section of the main gas pipeline, where a landslide in 2010 created a force pressure on the pipeline, resulting in a pipeline rupture.

scholarly journals SUBSTANTIATION OF DESIGN DECISIONS OF ELEMENTS OF MILITARY OBJECTS IN CONDITIONS OF CONTACT AND PLASTIC DEFORMATION

2021 ◽  
pp. 97-103
Author(s):  
Mykola M. Tkachuk ◽  
Mariia Saverska ◽  
Andrey Grabovskiy ◽  
Serhii Kutsenko
Keyword(s):  
Plastic Deformation ◽  
Contact Interaction ◽  
Strain State ◽  
Variational Principles ◽  
Physical Nonlinearity ◽  
Parametric Modeling ◽  
Stress Strain ◽  
Military Equipment ◽  
Stress Strain State ◽  
Design Solutions

New design solutions, technologies and materials are required to improve tactical and technical characteristics of military equipment. Often this implies operation in such conditions as contact interaction and elasto-plastic deformations of materials. New models and research methods are developed for better utilization of modern materials and improved performance of military equipment. They account directly for complex physical and structural nonlinearities. The properties of conventional and novel materials are determined both in bulk and on surfaces at microstructural level. This will enable physically adequate and mathematically correct analysis of stress-strain state. The new advanced design solutions will emerge through the objective-driven search by means of parametric modeling. The project will extend traditional local problem statements with newly developed variational principles that account for structural and physical nonlinearity and are suitable for parameterization. This will create the basis for fundamental analysis of torsion bar suspensions, hydrovolumetric and gear drives and other crucial components of combat vehicles, engineering solutions for domestic manufacturers of military equipment that will bring their tactical and technical characteristics to highest modern standards. Keywords: contact interaction; stress-strain state; intermediate layer; contact pressure; contact area; plastic deformation

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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