Investigation of fatigue assessments accuracy for beam weldments considering material data input and FE-mode type

Research output: Contribution to journalConference Contribution

1 Citation (Scopus)

Abstract

This study investigates the effects of fatigue material data and finite element types on accuracy of residual life assessments under high cycle fatigue. The bending of cross-beam connections is simulated in ANSYS Workbench for different combinations of structural member shapes made of a typical structural steel. The stress analysis of weldments with specific dimensions and loading applied is implemented using solid and shell elements. The stress results are transferred to the fatigue code nCode DesignLife for the residual life prediction. Considering the effects of mean stress using FKM approach, bending and thickness according to BS 7608:2014, fatigue life is predicted using the Volvo method and stress integration rules from ASME Boiler & Pressure Vessel Code. Three different pairs of S-N curves are considered in this work including generic seam weld curves and curves for the equivalent Japanese steel JIS G3106-SM490B. The S-N curve parameters for the steel are identified using the experimental data available from NIMS fatigue data sheets employing least square method and considering thickness and mean stress corrections. The numerical predictions are compared to the available experimental results indicating the most preferable fatigue data input, range of applicability and FE-model formulation to achieve the best accuracy.

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Fatigue of materials
steels
curves
fatigue (materials)
structural members
pressure vessels
Steel
stress analysis
fatigue life
boilers
least squares method
predictions
Pressure vessel codes
Structural members
Stress analysis
formulations
cycles
Boilers
Welds

Keywords

  • fatigue
  • weld
  • FE analysis
  • ANSYS
  • ncode
  • fintie element types
  • residual life assessments
  • stress integration

Cite this

@article{782e9156b99a4bc590a0ce9361da2b6f,
title = "Investigation of fatigue assessments accuracy for beam weldments considering material data input and FE-mode type",
abstract = "This study investigates the effects of fatigue material data and finite element types on accuracy of residual life assessments under high cycle fatigue. The bending of cross-beam connections is simulated in ANSYS Workbench for different combinations of structural member shapes made of a typical structural steel. The stress analysis of weldments with specific dimensions and loading applied is implemented using solid and shell elements. The stress results are transferred to the fatigue code nCode DesignLife for the residual life prediction. Considering the effects of mean stress using FKM approach, bending and thickness according to BS 7608:2014, fatigue life is predicted using the Volvo method and stress integration rules from ASME Boiler & Pressure Vessel Code. Three different pairs of S-N curves are considered in this work including generic seam weld curves and curves for the equivalent Japanese steel JIS G3106-SM490B. The S-N curve parameters for the steel are identified using the experimental data available from NIMS fatigue data sheets employing least square method and considering thickness and mean stress corrections. The numerical predictions are compared to the available experimental results indicating the most preferable fatigue data input, range of applicability and FE-model formulation to achieve the best accuracy.",
keywords = "fatigue, weld , FE analysis, ANSYS, ncode, fintie element types, residual life assessments, stress integration",
author = "Yevgen Gorash and Tugrul Comlekci and Donald MacKenzie",
year = "2017",
month = "6",
day = "2",
doi = "10.1088/1742-6596/843/1/012025",
language = "English",
volume = "843",
journal = "Journal of Physics: Conference Series",
issn = "1742-6588",

}

Investigation of fatigue assessments accuracy for beam weldments considering material data input and FE-mode type. / Gorash, Yevgen; Comlekci, Tugrul; MacKenzie, Donald.

In: Journal of Physics: Conference Series, Vol. 843, 012025, 02.06.2017.

Research output: Contribution to journalConference Contribution

TY - JOUR

T1 - Investigation of fatigue assessments accuracy for beam weldments considering material data input and FE-mode type

AU - Gorash, Yevgen

AU - Comlekci, Tugrul

AU - MacKenzie, Donald

PY - 2017/6/2

Y1 - 2017/6/2

N2 - This study investigates the effects of fatigue material data and finite element types on accuracy of residual life assessments under high cycle fatigue. The bending of cross-beam connections is simulated in ANSYS Workbench for different combinations of structural member shapes made of a typical structural steel. The stress analysis of weldments with specific dimensions and loading applied is implemented using solid and shell elements. The stress results are transferred to the fatigue code nCode DesignLife for the residual life prediction. Considering the effects of mean stress using FKM approach, bending and thickness according to BS 7608:2014, fatigue life is predicted using the Volvo method and stress integration rules from ASME Boiler & Pressure Vessel Code. Three different pairs of S-N curves are considered in this work including generic seam weld curves and curves for the equivalent Japanese steel JIS G3106-SM490B. The S-N curve parameters for the steel are identified using the experimental data available from NIMS fatigue data sheets employing least square method and considering thickness and mean stress corrections. The numerical predictions are compared to the available experimental results indicating the most preferable fatigue data input, range of applicability and FE-model formulation to achieve the best accuracy.

AB - This study investigates the effects of fatigue material data and finite element types on accuracy of residual life assessments under high cycle fatigue. The bending of cross-beam connections is simulated in ANSYS Workbench for different combinations of structural member shapes made of a typical structural steel. The stress analysis of weldments with specific dimensions and loading applied is implemented using solid and shell elements. The stress results are transferred to the fatigue code nCode DesignLife for the residual life prediction. Considering the effects of mean stress using FKM approach, bending and thickness according to BS 7608:2014, fatigue life is predicted using the Volvo method and stress integration rules from ASME Boiler & Pressure Vessel Code. Three different pairs of S-N curves are considered in this work including generic seam weld curves and curves for the equivalent Japanese steel JIS G3106-SM490B. The S-N curve parameters for the steel are identified using the experimental data available from NIMS fatigue data sheets employing least square method and considering thickness and mean stress corrections. The numerical predictions are compared to the available experimental results indicating the most preferable fatigue data input, range of applicability and FE-model formulation to achieve the best accuracy.

KW - fatigue

KW - weld

KW - FE analysis

KW - ANSYS

KW - ncode

KW - fintie element types

KW - residual life assessments

KW - stress integration

U2 - 10.1088/1742-6596/843/1/012025

DO - 10.1088/1742-6596/843/1/012025

M3 - Conference Contribution

VL - 843

JO - Journal of Physics: Conference Series

T2 - Journal of Physics: Conference Series

JF - Journal of Physics: Conference Series

SN - 1742-6588

M1 - 012025

ER -