Simulation Of Stress-strain State Research Articles

Computer Simulation of Stress-Strain State of Pipeline Section Affected by Abrasion Due to Mechanical Impurities

The paper presents the effect of abrasive wear of the pipeline section occurred due to mechanical impurities in the transported gas flow. The approaches to the detection of the maximum specific wear of the pipeline wall and the geometry of abrasion are the main problems of computer simulation described in this paper.

Numerical Simulation of Stress-Strain State of Asphalt Concrete Pavement on the Carriageway of the South Bridge in Kiev

Taking account of the fact that there is complex space load on the carriageway of the South highway stream crossing it is reasonable to use numerical method for determination of stain and tension pavement condition based on the solution of elasticity theory equations – Finite Element. The application of numerical modeling is determined by the fact that load patterns are becoming more complicated and require spacial concept in order to enhance the quality of overpass pavement design. Atypical example for deformation fields distribution in one of the bridge crossing sections under traffic load is provided. The analysis of the investigation results enables us to conclude that the minimum tension stress in the pavement will be at the pavement thickness 90 mm and stamp diameter 300 mm. under this condition the tension in the pavement will not exceed 3.7 MPa.

Stress–Strain State Calculation Procedure for Compound Technical Objects Using Potential Theory Methods

The paper presents the stress–strain state simulation of the compound technical structure – vulcanizer diaphragm. A set of working plates in the form of a circular plate with the thickness discretely varied in the radial direction is modeled. An algorithm to solve the contact problem is developed. The obtained calculation results are compared with the experimental ones to demonstrate their practical use.

Stress State of Disk Tool Attachment Points on Tetrahedral Prisms between Axial Bits

The paper presents results of simulation of stress-strain state of disk tools attachment points on tetrahedral prisms of working bodies of multipurpose roadheaders while cutting of coal and rock faces.

Stress-strain state simulation of large-sized cable-stayed shell structures

This paper studies the opportunities for applying framed cable-stayed shell structures to generate innovative structures in civil engineering. Numerical solution methods for stress-strain state problems of these kinds of geometrically nonlinear structures were developed. Developed methods efficiency is presented by a range of large-dimensional space antenna reflectors.

Plasticity and creep of steel 3 at room temperature

Results of experimental investigations at the room temperature of specimens made from steel 3 are presented in a paper. It was found, that steel 3 at room temperature demonstrates essential creep, when strains are more than 2%. The anisotropy of creep properties for considered steel was fixed. The values of constants which are included in suggested state equations for steel 3 at temperature 20 С were determined. Comparison between experimental and calculated data show the satisfactory ability of use the suggested state equations for numerical simulation of stress-strain state’s varying in conditions, when load causes the instant stresses which are more than yield limit as well as instant plastic strains occur.

Application of finite element method for simulation of stress-strain state in manufacturing of long turbine blades made of high-strength titanium alloys

The engineering simulation software Deform 3D is applied for development and adoption of 3D simulation of manufacturing of pressed semifinished 1600 mm blades. Three stages of pressing are considered, including heating, intermediate cooling in transporting, and cooling of billet as a consequence of heat exchange with the die. On the basis of simulation, the distribution of temperature fields and strain fields is obtained at various stages of pressing. The calculation reveals that, at all pressing stages, the temperature of billet does not exceed the temperature of polymorphic transformation. The simulation demonstrates that such billet can be pressed in accordance with standard specifications.

Моделирование напряженно-деформированного состояния насыщенного капиллярно-пористого полупространства при воздействии на его границу высокоскоростной водной струи

Моделирование напряженно-деформированного состояния насыщенного капиллярно-пористого полупространства при воздействии на его границу высокоскоростной водной струи

3D Simulation of Stress-Strain State of Plasma Arc Surfacing by CAD/CAE Software Sysweld

The deformation process during the plasma arc surfacing is analyzed by CAD/CAE software SysWeld under Visual Environment using 3D simulation. The aim of simulation is visualization of a temperature field and a stress-strain state distribution as resul ts of surfacing under typical technological parameters of plasma arc processing which could be used for education. Key w ords : CAD/CAE simulation , plasma arc surfacing , stress-strain state

Моделирование напряженно-деформированного состояния крана-манипулятора машины для сварки трубопроводов

Моделирование напряженно-деформированного состояния крана-манипулятора машины для сварки трубопроводов

Numerical Simulation of Stress-Strain State for Nonhomogeneous Shell-Type Structures Based on the Finite Element Method

Projective-iterative version of finite element method has developed for numerical simulation of the stress-strain state of nonhomogeneous shell-type structures (shells with openings). Plastic deformation of the material is taken into account when using the method of elastic solutions that reduce the solution of elastoplastic problems to solution of elastic problems. Developed PIV’s significant savings of computer calculation has been compared with the calculation on a fine mesh of traditional FEM. Designed scheme allows analysis of the mutual influence of openings. Analysis of the transformation zone of plastic deformation is developed. For definiteness, the cylindrical shell structures with several rectangular openings are considered.

Simulation of stress-strain state in SiGe island heterostructures

The problem of simulation of the stress-strain state in SiGe island heterostructures is considered. The analytic-numerical method of multipole expansions is used to obtain an approximate solution. The problem of the stressed state influence on the diffusion mobility of atoms adsorbed on the heterostructure free surface is also discussed.

Numerical simulation of stress-strain state near crack tip in a compact tensile specimen

A computational scheme has been developed and a numerical simulation of the stress-strain state near the crack tip is performed at different levels of the stress intensity factor using a compact tensile specimen as an example. The authors analyze the influence of the finite element size near the crack tip and compare the results obtained in different codes (software packages) for different crack geometries.

Experimental evaluation of the electric pulse effect on residual stresses in a Ti-Al-Si-Ag coating

Experimental results and stress-strain state simulation by the finite element method show that a thin oxidation-resistant coating sputtered onto a titanium alloy substrate develops high-level residual stresses. The electric pulse passed through a coated specimen significantly reduces an average level of residual stresses in the coating.