Application studies for fatigue strength improvement of welded structures by high-frequency mechanical impact (HFMI) treatment

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Application studies for fatigue strength improvement of welded structures by high-frequency mechanical impact (HFMI) treatment. / Yildirim, Halid Can; Leitner, Martin; Marquis, Gary B.; Stoschka, Michael; Barsoum, Zuheir.

In: Engineering Structures, Vol. 106, 01.01.2016, p. 422-435.

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Yildirim, Halid Can ; Leitner, Martin ; Marquis, Gary B. ; Stoschka, Michael ; Barsoum, Zuheir. / Application studies for fatigue strength improvement of welded structures by high-frequency mechanical impact (HFMI) treatment. In: Engineering Structures. 2016 ; Vol. 106. pp. 422-435.

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@article{85b587e6f4e24f209d2de9ac628421e9,
title = "Application studies for fatigue strength improvement of welded structures by high-frequency mechanical impact (HFMI) treatment",
abstract = "In 2013, a new guideline for the design of high-frequency mechanical impact (HFMI) treatment was drafted. The proposed design curves were made based on the fatigue data of axially-loaded welded joints which were manufactured from high-strength steels. All the S-N curves were shown to be conservative with respect to the existing fatigue data for laboratory-scale specimens of longitudinal, transverse, and butt welds.In reality, structures in civil, offshore, mechanical engineering and ship industries generally include large-scale and more complicated components rather than laboratory-scale specimens. Therefore, this paper firstly presents the validation of design proposals by considering fatigue data sets for large-scale welded structures. In total, 62 fatigue data points for bridge, crane and beam-like components are reported, in which the yield strength varies from 250 to 725 MPa, and stress ratio varies from -1 to 0.56. Validations are then extended also for cover plates by performing fatigue tests of 23 weld details both in as-welded and HFMI-treated cases for the use of crane industry. Both the extracted and obtained fatigue data are found to be in good agreement with the previously-proposed design guidelines for nominal and effective notch stress assessment. (C) 2015 Elsevier Ltd. All rights reserved.",
keywords = "High-frequency mechanical impact (HMI), Large-scale structures, Fatigue strength improvement, High-strength steels, Light-weight design, AMPLITUDE LOADING CONDITIONS, BEHAVIOR",
author = "Yildirim, {Halid Can} and Martin Leitner and Marquis, {Gary B.} and Michael Stoschka and Zuheir Barsoum",
year = "2016",
month = "1",
day = "1",
doi = "10.1016/j.engstruct.2015.10.044",
language = "English",
volume = "106",
pages = "422--435",
journal = "Engineering Structures",
issn = "0141-0296",
publisher = "Elsevier BV",

}

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TY - JOUR

T1 - Application studies for fatigue strength improvement of welded structures by high-frequency mechanical impact (HFMI) treatment

AU - Yildirim, Halid Can

AU - Leitner, Martin

AU - Marquis, Gary B.

AU - Stoschka, Michael

AU - Barsoum, Zuheir

PY - 2016/1/1

Y1 - 2016/1/1

N2 - In 2013, a new guideline for the design of high-frequency mechanical impact (HFMI) treatment was drafted. The proposed design curves were made based on the fatigue data of axially-loaded welded joints which were manufactured from high-strength steels. All the S-N curves were shown to be conservative with respect to the existing fatigue data for laboratory-scale specimens of longitudinal, transverse, and butt welds.In reality, structures in civil, offshore, mechanical engineering and ship industries generally include large-scale and more complicated components rather than laboratory-scale specimens. Therefore, this paper firstly presents the validation of design proposals by considering fatigue data sets for large-scale welded structures. In total, 62 fatigue data points for bridge, crane and beam-like components are reported, in which the yield strength varies from 250 to 725 MPa, and stress ratio varies from -1 to 0.56. Validations are then extended also for cover plates by performing fatigue tests of 23 weld details both in as-welded and HFMI-treated cases for the use of crane industry. Both the extracted and obtained fatigue data are found to be in good agreement with the previously-proposed design guidelines for nominal and effective notch stress assessment. (C) 2015 Elsevier Ltd. All rights reserved.

AB - In 2013, a new guideline for the design of high-frequency mechanical impact (HFMI) treatment was drafted. The proposed design curves were made based on the fatigue data of axially-loaded welded joints which were manufactured from high-strength steels. All the S-N curves were shown to be conservative with respect to the existing fatigue data for laboratory-scale specimens of longitudinal, transverse, and butt welds.In reality, structures in civil, offshore, mechanical engineering and ship industries generally include large-scale and more complicated components rather than laboratory-scale specimens. Therefore, this paper firstly presents the validation of design proposals by considering fatigue data sets for large-scale welded structures. In total, 62 fatigue data points for bridge, crane and beam-like components are reported, in which the yield strength varies from 250 to 725 MPa, and stress ratio varies from -1 to 0.56. Validations are then extended also for cover plates by performing fatigue tests of 23 weld details both in as-welded and HFMI-treated cases for the use of crane industry. Both the extracted and obtained fatigue data are found to be in good agreement with the previously-proposed design guidelines for nominal and effective notch stress assessment. (C) 2015 Elsevier Ltd. All rights reserved.

KW - High-frequency mechanical impact (HMI)

KW - Large-scale structures

KW - Fatigue strength improvement

KW - High-strength steels

KW - Light-weight design

KW - AMPLITUDE LOADING CONDITIONS

KW - BEHAVIOR

U2 - 10.1016/j.engstruct.2015.10.044

DO - 10.1016/j.engstruct.2015.10.044

M3 - Article

VL - 106

SP - 422

EP - 435

JO - Engineering Structures

JF - Engineering Structures

SN - 0141-0296

ER -

ID: 1483982