scholarly journals Numerical simulation of the stress-strain state of complex-reinforced elements

2019 ◽  
Vol 13 (2) ◽  
pp. 110-115
Author(s):  
Olena Krantovska ◽  
Mykola Petrov ◽  
Liubov Ksonshkevych ◽  
Matija Orešković ◽  
Sergii Synii ◽  
...  
Keyword(s):  
Numerical Simulation ◽  
Strain State ◽  
Theoretical Calculations ◽  
Experimental Studies ◽  
Theoretical Studies ◽  
Stress Strain ◽  
Narrow Strip ◽  
Stress Strain State ◽  
Graphical Environment ◽  
Experimental And Theoretical Studies

The article describes a developed technique of a numerical simulation of the stress-strain state of complex-reinforced elements, which allows you to create models of double-span continuous. The performed experimental and theoretical studies allowed us to carry out the testing of the developed design model and to justify the reliability of the proposed numerical simulation methodology. The results of the experimental studies were compared with those of the theoretical studies. The theoretical calculus algorithm was developed by using the finite element method. Theoretical calculations were performed by using the mathematical-graphical environment software system LIRA-SOFT and the mathematical and computer program MATLAB. On the basis of the experimental research, the iso-fields of displacements and stresses in the materials of an eccentrically compressed beam with a small bend of the slab were constructed, which collapse behind the inclined narrow strip of concrete and displacements and stresses in the materials of the eccentrically stretched beam, which is destroyed due to the yield of the upper mounting armature.

scholarly journals Discussing the effect of the wheelset equivalent conicity on the stress-strain state of the rails

2021 ◽  
Vol 2021 (2) ◽  
pp. 261-272
Author(s):  
Lyudmila S. BLAZHKO ◽  
◽  
Artem A. KISELEV ◽  
Igor P. KISELEV ◽  
Andrey V. ROMANOV ◽  
...  
Keyword(s):  
Numerical Simulation ◽  
Field Experiment ◽  
High Speed ◽  
Strain State ◽  
Practical Importance ◽  
Experimental Studies ◽  
Resistance Force ◽  
Stress Strain ◽  
Stress Strain State ◽  
Equivalent Conicity

Objective: To assess the effect of the wheelset equivalent conicity on the stress-strain state of the rails. Methods: Authors used numerical integration methods for systems of nonlinear differential equations of motion in the Universal Mechanism software package. Experimental studies were carried out on the St. Petersburg – Moscow high-speed line using a multichannel strain-gauge station. Methods of mathematical statistics have been used to process the results of numerical simulation and field experiment. Results: The stresses and strains in the wheel-rail contact area and their dependence on the wheelset equivalent conicity have been determined. According to numerical simulation and field experiment, the convergence was within 15 %. Practical importance: The need for updating the standards for the maintenance of a rail track on high-speed lines has been revealed. Allowing for the wheelset equivalent conicity decreases the risk of intense hunting oscillation, which would reduce the dynamic wheel–rail effect. Mobile treatment of rails on the way makes it possible to extend the safe operation time and reduce the rolling stock motion resistance force of the track.

scholarly journals KNEE JOINT OF THREE-HINGED GLUED TIMBER PORTAL FRAME EXECUTED AS JOINT ON GLUED-IN RODS

2021 ◽  
pp. 82-102
Author(s):  
А.Ya. Naichuk ◽  
Keyword(s):  
Knee Joint ◽  
Software Package ◽  
Strain State ◽  
Experimental Studies ◽  
Theory Of Elasticity ◽  
Knee Joints ◽  
Design Solution ◽  
Stress Strain ◽  
Stress Strain State ◽  
Experimental And Theoretical Studies

In the modern construction of buildings and structures there are many constructive solutions for connecting the rafter with the column of wooden three-hinged portal frames. One of these constructive solutions is the use of knee joints executed as joint on glued-in rods. Despite the accumulated experience in the construction of buildings using timber structures with joints on glued-in rods, there are still urgent tasks to improve the technology of their manufacture and calculation models. The purpose of this work was to conduct experimental and theoretical studies of the knee joint executed as joint on glued-in rods to determine the stress-strain state of the timber in the connection region. To develop of proposals for improving knee joint executed as joint on glued-in rods. The study of the stress-strain state of the knee joint was carried out by solving a plane problem of the theory of elasticity using a software package based on the finite element method. In the software package used, procedures are implemented to take into account the anisotropy of the mechanical properties of wood, the violation of contact between the surfaces of the elements connected in the knee joint. Experimental studies were carried out by the method of static loading of a prototype of a knee joint made in full size, which in its geometric parameters and material properties corresponded to the CE model. As a result of the conducted studies, it was found that in the stretched zone of the knee joint, the glued rods of the rafter and the column are characterized by a significant uneven distribution of forces, in addition, the rods are subjected to compression, tension and bending. The most loaded are the rods located at the maximum distance from the joint of the rafter and the column. The distribution of forces in the rods of the compressed zone is close to uniform. The stress distribution along the length of the inclined rods of the embedded parts is characterized by a large unevenness. Based on the analysis of the stress-strain state of the knee joint of the frame, a new design solution is proposed in terms of the number of glued-in rods and their spacing.

scholarly journals Numerical simulation of stress-strain state of electrophoretic shell molds

2017 ◽  
Vol 894 ◽  
pp. 012125 ◽  
Author(s):  
A V Sviridov ◽  
V I Odinokov ◽  
E A Dmitriev ◽  
A I Evstigneev ◽  
O V Bashkov
Keyword(s):  
Numerical Simulation ◽  
Strain State ◽  
Stress Strain ◽  
Stress Strain State

scholarly journals Simulation of Seismic Explosion Waves with Underground Pipe Interaction

2018 ◽  
Vol 55 (3) ◽  
pp. 27-33 ◽  
Author(s):  
N. Remez ◽  
A. Dychko ◽  
S. Kraychuk ◽  
N. Ostapchuk ◽  
L. Yevtieieva ◽  
...  
Keyword(s):  
Numerical Simulation ◽  
Nonlinear Theory ◽  
Strain State ◽  
Underground Pipeline ◽  
Plastic Medium ◽  
Wave Processes ◽  
Stress Strain ◽  
Nonlinear Theory Of Shells ◽  
Stress Strain State ◽  
Theory Of Shells

Abstract The present paper provides numerical simulation of interaction of wave processes in the system “soil massif – underground pipeline” in explosion of charge on the surface of ground. Construction is considered in the framework of nonlinear theory of shells of Tymoshenko type. Soil is modelled by a solid porous multicomponent visco-plastic medium. The study establishes patterns of changes in stress-strain state of system depending on depth of pipeline laying and its diameter.

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