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A guideline for fatigue strength improvement of high strength steel welded structures using high frequency mechanical impact treatment
KTH, School of Engineering Sciences (SCI), Aeronautical and Vehicle Engineering, Lightweight Structures. Aalto University, School of Engineering, Espoo, 00076, Finland .
KTH, School of Engineering Sciences (SCI), Aeronautical and Vehicle Engineering, Lightweight Structures.ORCID iD: 0000-0003-4180-4710
2013 (English)In: Procedia Engineering, Elsevier, 2013, 98-107 p.Conference paper, Published paper (Refereed)
Abstract [en]

In the past decade, high frequency mechanical impact (HFMI) has significantly developed as a reliable, effective and userfriendly method for post-weld fatigue strength improvement technique for welded structures. This paper presents a proposed fatigue design and assessment guideline for HFMI improved welded joints. Stress analysis methods based on nominal stress, structural hot spot stress and effective notch stress are discussed. The document especially considers the observed extra benefit that has been experimentally observed for HFMI treated high strength steels. The proposal is considered to apply to steel structures from plate thickness 5 to 50 mm and for yield strengths ranging from 235 MPa to 960 MPa. Several fatigue assessment examples are also provided. Lessons learned concerning appropriate HFMI procedures and quality assurance measures are presented. Due to differences in the HFMI tools and the wide variety of potential applications, certain details of a proper treatment procedures and quantitative quality control measures are presented generally. It is proposed that specific details should be documented in a HFMI Procedure Specification for each structure being treated. It is hoped that this guideline proposal will provide a stimulus to researchers working in the field.

Place, publisher, year, edition, pages
Elsevier, 2013. 98-107 p.
Series
Procedia Engineering, ISSN 1877-7058 ; 66
Keyword [en]
Fatigue design, Guideline, HFMI
National Category
Other Materials Engineering
Identifiers
URN: urn:nbn:se:kth:diva-147502DOI: 10.1016/j.proeng.2013.12.066ISI: 000338327000011Scopus ID: 2-s2.0-84894476480OAI: oai:DiVA.org:kth-147502DiVA: diva2:730110
Conference
5th International Conference on Fatigue Design, Fatigue Design 2013, 27 November 2013 through 28 November 2013, Senlis, France
Note

QC 20140627

Available from: 2014-06-27 Created: 2014-06-27 Last updated: 2015-10-06Bibliographically approved

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Barsoum, Zuheir

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