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Lightweight potential of welded high-strength steel joints from S700 under constant and variable amplitude loading by high-frequency mechanical impact (HFMI) treatment
KTH, School of Engineering Sciences (SCI), Aeronautical and Vehicle Engineering, Lightweight Structures. Aalto University, Finland .
2015 (English)In: Procedia Engineering, 2015, no C, 467-475 p.Conference paper (Refereed)
Abstract [en]

Investigations with longitudinal stiffeners of the steel grade S700 under fully-reversed, constant amplitude loading and under variable amplitude loading with a straight-line spectrum show impressive fatigue strength improvement by high-frequency mechanical impact (HFMI) treatment. However, the degree of improvement was for variable amplitude loading lower when compared to constant amplitude loading due to local plasticity which occurs during larger load levels and consequently reduces the beneficial compressive residual stresses. Apart from the HFMI-treatment, the exceedance of constant amplitude loading (Woehler-lines) by variable amplitude loading (Gassner-lines) offers further lightweight potential, despite the lower degree of improvement by HFMI under spectrum loading.

Place, publisher, year, edition, pages
2015. no C, 467-475 p.
, Procedia Engineering, ISSN 1877-7058 ; 101
Keyword [en]
Constant and variable amplitude loading, High-frequency mechanical impact treatment, High-strength steel, Lightweight design, Longitudinal stiffeners
National Category
Applied Mechanics
URN: urn:nbn:se:kth:diva-167387DOI: 10.1016/j.proeng.2015.02.056ISI: 000380492500056ScopusID: 2-s2.0-84925726481OAI: diva2:815659
International Conference on Material and Component Performance under Variable Amplitude Loading, VAL 2015; Prague Congress Centre5. Kvetna 65Prague 4; Czech Republic; 23 March 2015 through 26 March 2015

QC 20150601

Available from: 2015-06-01 Created: 2015-05-22 Last updated: 2016-09-05Bibliographically approved

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