Simulation of the stress-strain state of composite beams subjected to bending in two planes. Part 2. Realization of the nonclassical model and numerical results

1999 ◽  
Vol 31 (3) ◽  
pp. 292-298
Author(s):  
A. V. Gorik ◽  
A. L. Lyakhov ◽  
V. G. Piskunov ◽  
V. N. Cherednikov
Keyword(s):  
Strain State ◽  
Composite Beams ◽  
Numerical Results ◽  
Stress Strain ◽  
Stress Strain State ◽  
Nonclassical Model

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 The effect of distributed dislocations on bending of a rectangular beam with a preliminarily stressed layer under superposition of large strains

2019 ◽  
Vol 485 (6) ◽  
pp. 686-690
Author(s):  
V. A. Levin ◽  
L. M. Zubov ◽  
K. M. Zingerman
Keyword(s):  
Strain State ◽  
Elastic Solid ◽  
Numerical Results ◽  
Large Strains ◽  
Stress Strain ◽  
Stress Strain State ◽  
Stressed Layer ◽  
Nonlinearly Elastic ◽  
Formulation Of Problems ◽  
Distributed Dislocations

The formulation of problems on the equilibrium of a nonlinearly elastic solid with continuously distributed dislocations is proposed for the case of superposition of large strains. The numerical results showing the effect of distributed dislocations on the stress-strain state of the beam are presented.

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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