Simulation of Stress Concentrations in Notches

The fatigue life curves of materials are very sensitive to the magnitude of the stress amplitude. A small change or inaccuracy in the determination of the stress value causes large changes or inaccuracies in the calculated fatigue life estimate. Therefore, the use of computer simulations for fatigue...

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Main Authors: Vladimír Chmelko, Michal Harakaľ, Pavel Žlábek, Matúš Margetin, Róbert Ďurka
Format: Article
Language:English
Published: MDPI AG 2021-12-01
Series:Metals
Subjects:
Online Access:https://www.mdpi.com/2075-4701/12/1/43
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author Vladimír Chmelko
Michal Harakaľ
Pavel Žlábek
Matúš Margetin
Róbert Ďurka
author_facet Vladimír Chmelko
Michal Harakaľ
Pavel Žlábek
Matúš Margetin
Róbert Ďurka
author_sort Vladimír Chmelko
collection DOAJ
description The fatigue life curves of materials are very sensitive to the magnitude of the stress amplitude. A small change or inaccuracy in the determination of the stress value causes large changes or inaccuracies in the calculated fatigue life estimate. Therefore, the use of computer simulations for fatigue life estimation requires a proper model development methodology. The paper is devoted to the problem of the modeling of components in notches using FEM. The modeling parameters significantly influencing the obtained stress results have been defined. Exact analytical solutions served as a benchmark for comparing the accuracy of the stress values obtained using FEM models. For the selected 2D and 3D notched components, diagrams were created for sensitivity analysis of the influence of the mesh element density at the root of the notch in correlation with the exact analytical solution. The findings from model building were applied to model the stress concentration at the root of a V-weld joint in a gas pipeline.
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spelling doaj.art-055546ec925a4ab8930cd652d7fac4622023-11-23T14:41:27ZengMDPI AGMetals2075-47012021-12-011214310.3390/met12010043Simulation of Stress Concentrations in NotchesVladimír Chmelko0Michal Harakaľ1Pavel Žlábek2Matúš Margetin3Róbert Ďurka4Institute of Applied Mechanics and Mechatronics, Slovak University of Technology in Bratislava, Námestie Slobody 17, 81231 Bratislava, SlovakiaInstitute of Applied Mechanics and Mechatronics, Slovak University of Technology in Bratislava, Námestie Slobody 17, 81231 Bratislava, SlovakiaRegional Technological Institute, University of West Bohemia, Universitní 8, 306 14 Pilsen, Czech RepublicInstitute of Applied Mechanics and Mechatronics, Slovak University of Technology in Bratislava, Námestie Slobody 17, 81231 Bratislava, SlovakiaInstitute of Applied Mechanics and Mechatronics, Slovak University of Technology in Bratislava, Námestie Slobody 17, 81231 Bratislava, SlovakiaThe fatigue life curves of materials are very sensitive to the magnitude of the stress amplitude. A small change or inaccuracy in the determination of the stress value causes large changes or inaccuracies in the calculated fatigue life estimate. Therefore, the use of computer simulations for fatigue life estimation requires a proper model development methodology. The paper is devoted to the problem of the modeling of components in notches using FEM. The modeling parameters significantly influencing the obtained stress results have been defined. Exact analytical solutions served as a benchmark for comparing the accuracy of the stress values obtained using FEM models. For the selected 2D and 3D notched components, diagrams were created for sensitivity analysis of the influence of the mesh element density at the root of the notch in correlation with the exact analytical solution. The findings from model building were applied to model the stress concentration at the root of a V-weld joint in a gas pipeline.https://www.mdpi.com/2075-4701/12/1/43notchFEM simulationstress concentrationanalytical solution
spellingShingle Vladimír Chmelko
Michal Harakaľ
Pavel Žlábek
Matúš Margetin
Róbert Ďurka
Simulation of Stress Concentrations in Notches
Metals
notch
FEM simulation
stress concentration
analytical solution
title Simulation of Stress Concentrations in Notches
title_full Simulation of Stress Concentrations in Notches
title_fullStr Simulation of Stress Concentrations in Notches
title_full_unstemmed Simulation of Stress Concentrations in Notches
title_short Simulation of Stress Concentrations in Notches
title_sort simulation of stress concentrations in notches
topic notch
FEM simulation
stress concentration
analytical solution
url https://www.mdpi.com/2075-4701/12/1/43
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AT michalharakal simulationofstressconcentrationsinnotches
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AT robertdurka simulationofstressconcentrationsinnotches