Bending Process Simulation of a Flat Workpiece with Various Cross-Sectional Mechanical Properties with PAM-STAMP 2G

2016 ◽  
Vol 685 ◽  
pp. 133-136 ◽  
Author(s):  
Fedor Grechnikov ◽  
Yurii Gorshkov ◽  
Yaroslav Erisov
Keyword(s):  
Mechanical Properties ◽  
Heat Affected Zone ◽  
Process Simulation ◽  
Laser Cutting ◽  
Strain State ◽  
Stress Strain ◽  
Cross Sectional ◽  
Stress Strain State ◽  
Bending Process

We have simulated an aluminum workpiece tool bending process with and without consideration of the heat affected zone after laser cutting with PAM-STAMP 2G. To describe the heat affected zone we have used a customized software option for calculating welded materials and dissimilar ones. We have also provided an analysis of the stress-strain state with a different scale of mechanical properties of the material on its “edge” and in the center of the workpiece.

scholarly journals Calculated cross-sectional model and stages of the stress-strain state of the wood element for transverse bending

2019 ◽  
Author(s):  
Svyatoslav S. Gomon ◽  
Svyatoslav Gomon ◽  
Victor Karavan ◽  
Petro Gomon ◽  
Justyna Sobczak-Piąstka
Keyword(s):  
Strain State ◽  
Stress Strain ◽  
Cross Sectional ◽  
Stress Strain State ◽  
Transverse Bending ◽  
Sectional Model

Numerical Analysis of Stress-Strain State and Crack Propagation in Welded Samples

2017 ◽  
Vol 265 ◽  
pp. 507-512
Author(s):  
M.S. Bisong ◽  
P.V. Sivtsev ◽  
V.V. Lepov
Keyword(s):  
Numerical Analysis ◽  
Crack Growth ◽  
Heat Affected Zone ◽  
Strain State ◽  
Stochastic Modelling ◽  
Hardness Test ◽  
Crack Size ◽  
Stress Strain ◽  
Mechanical Heterogeneity ◽  
Stress Strain State

The numerical analysis of stress-strain state of low-alloyed welded steel samples test has been considered. The mechanical heterogeneity has been estimated by the micro hardness test. The stress-strain state analysis is based on the models of linear elasticity, which are described by Lame equations for displacement. In this case the samples are considered as perfect welded samples without any welding defects. The discretization of the system of equations is done through the finite element method, and the numerical realization of the method is performed on collection of free software FEniCS. The defects influence has been estimated by stochastic modelling of viscous crack growth. The data for crack size in weld and heat affected zone was obtain from microscopic observation, and for mechanical properties from microhardness testing. The result obtained shows that, the distribution of displacement in all samples are almost the same. Between the welded zone, the heat affected zone and the external elliptic zone, the Von Mizes stress is almost the same in all three samples. Concerning the crack growth, the velocity of it propagation in welded zone is higher as much again than that in the heat affected zone. This research is beneficial to welders, modellers of structures, researches as a whole.

scholarly journals Computer modeling of volumetric damageability in the mine roadway neighbourhood

Doklady BGUIR ◽  
2020 ◽  
Vol 18 (7) ◽  
pp. 47-54
Author(s):  
S. S. Sherbakov ◽  
L. A. Shemet ◽  
A. A. Nasan
Keyword(s):  
Finite Element ◽  
Computer Modeling ◽  
Solid Body ◽  
Strain State ◽  
Rock Massif ◽  
Limited Area ◽  
Stress Strain ◽  
Cross Sectional ◽  
Stress Strain State ◽  
Mine Roadway

The object of research is a rock massif with various cross-sectional shapes of roadway. The purpose of work: computer modeling of stress-strain state and volumetric damageability in the neighbourhood of a mine roadway. The undisturbed rock massif has an initial stress-strain state (under its own weight) before a mine roadway is formed. Therefore, to determine the stress-strain state of the rock massif with the mine roadway, we must first calculate the stress state of the rock massif without the roadway and then take it into account as a pre-stressed state for the rock massif therewith. Damageability assessment of the rock massif with a mine roadway was carried out based on the obtained distributions of stresses and strains. We calculated volumetric damageability through the model of a deformed solid body with dangerous volume. Dangerous volume is a limited area where stresses or strains exceed the predetermined threshold. Calculation of dangerous volumes and integral damageability was carried out in the finite element package ANSYS. The program was written in APDL. The ratios between the existing and limiting stresses was calculated for each finite element. The elements for which this ratio exceeds unity will form a dangerous volume for the whole model. As a result, we have an array of finite elements constituting the dangerous volume and its value. The developed method for assessing damageability in the mine roadway neighbourhood takes into account various cross-sectional shapes of the mine roadway and its depth. The relevance of studying possible destruction regions using the model of a deformed solid body with dangerous volume was substantiated.

scholarly journals About One of the Approaches for the Research of the Stress-Strain State of a Flange Connection with a Seal Made of an Alloy with Shape Memory

2022 ◽  
Author(s):  
A. Boikov
Keyword(s):  
Mechanical Properties ◽  
Shape Memory ◽  
Contact Zone ◽  
Axial Compression ◽  
Strain State ◽  
Physical And Mechanical Properties ◽  
Stress Strain ◽  
Flange Connection ◽  
Stress Strain State ◽  
Alternative Approach

Abstract. Design features of a flange connection with a seal made of an alloy with shape memory and the most commonly used methods of researching of the stress-strain state of such connections are estimated. Alternative approach for stress-strain state analysis is proposed, it is based on modeling of the contact zone of the sealing surfaces by means of an equivalent gap between the layers, the value of which changes during axial compression of the multilayer ring and goes into tension. Formulas for determining of contact stresses at the border of layers, which take into consideration the variable physical and mechanical properties of the materials of each layer are presented.

Study and analysis of stress-strain state of shearing operations of sheet stamping

2021 ◽  
pp. 499-509
Author(s):  
V.N. Kokorin ◽  
V.P. Tabakov ◽  
O.I. Morozov ◽  
Yu.A. Titov ◽  
N.V. Mishov ◽  
...  
Keyword(s):  
Process Simulation ◽  
Strain State ◽  
Stress Strain ◽  
Stress Strain State ◽  
Sheet Stamping

The analysis results of the effect of the inter-tool gap and the material on the quality of the punching products are presented. The issues for determining of the rational values range of the inter-tool gap, taking into account the result of the shearing process simulation in the LS-DYNA system.

Influence of harmonic components of non-circularity and non-cylindricity on the formation of stress-strain state of surface layers of parts in interference fit joints

2020 ◽  
pp. 3-7
Author(s):  
A.A. Zyuzin ◽  
I.S. Konstantinova ◽  
B.N. Kaz'min ◽  
M.D. Yurov
Keyword(s):  
Strain State ◽  
Low Frequency ◽  
Surface Layers ◽  
Stress Strain ◽  
Shape Deviation ◽  
Cross Sectional ◽  
Interference Fit ◽  
Stress Strain State ◽  
Shape Errors ◽  
Harmonic Components

The results of the study of the influence of the harmonic components of non-circularity and non-cylindricity on the formation of the stress-strain state (SSS) of the surface layers of parts in interference fit joints are presented. It is determined, that in order to increase the reliability of fixed joints of parts in the shape errors of high-precision mounting surfaces, it is necessary to minimize the amplitudes of the harmonic components of the low-frequency range of the 2nd, 3rd and 4th orders and form an isotropic microrelief. Keywords interference fit joints, non-circularity of cross-sectional profiles, harmonic components, non-cylindricity, microtopography, microasperities, stress-strain state, shape deviation spectra. [email protected]

scholarly journals Investigation of the unevenness of mechanical properties along the cross-section of continuously cast billets

2018 ◽  
pp. 250-258
Author(s):  
D. G. Palamar ◽  
S. A. Vorobey ◽  
V. G. Razdobreev ◽  
T. V. Balahanova
Keyword(s):  
Mechanical Properties ◽  
Cross Section ◽  
Strain State ◽  
Central Zone ◽  
Carbon Steels ◽  
Low Carbon ◽  
Stress Strain ◽  
Stress Strain State ◽  
Continuously Cast ◽  
The Cross

The aim of the work is to study the non-uniformity of mechanical properties in the cross section of continuously cast billets of various manufacturers in Ukraine. Mechanical properties were determined by the method of measuring Brinell hardness. Mathematical relationships were developed to describe them and determine the need to take this factor into account when calculating the stress-strain state of blanks. It is established that the hardness of the surface layer of blanks, as a rule, is higher than the central zone by 0.5-7.6%. This is due to the smaller and dense dendritic structure of the surface layers. The biggest difference is observed in workpieces with a thickness of 410 mm made of steel grade 20. In workpieces made of steel grade 45, the difference in hardness of the surface layer and the central zone is 0.5-4.7% and practically does not depend on the thickness of the workpiece in the investigated interval (135-350 mm). It is shown that in the study of the stress-strain state of the metal when rolling continuously cast billets of low-carbon steels, it is advisable to take into account the uneven distribution of mechanical properties over the cross section. For medium carbon steel blanks, this factor is optional. On the basis of literature data and the results of experimental studies performed, dependencies describing the change in strength and plastic properties in the cross section of continuously cast billets of low carbon steels are proposed. These dependencies should be used in the calculation of the stress-strain state of the metal. For medium-carbon steel blanks, this factor is optional.

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