Fatigue strength improvement for ship structures by Ultrasonic Peening

Deguchi, Takanori; Mouri, Masashi; Hara, Junya; Kano, Daichi; Shimoda, Taichiro; Inamura, Fumihide; Fukuoka, Tetsuji; Koshio, K

doi:10.1007/s00773-012-0172-3

Cited by 45 publications

(21 citation statements)

References 1 publication

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“…These data points were analysed, however, separately from the rest of the data. In some cases, numerical values of stress range and cycles to failure were not provided, and the data were extracted from the S–N plots using open‐source software. A summary of the fatigue test data reviewed in this study is given in Tables .…”

Section: Experimental Datamentioning

confidence: 99%

“…The summary provides the used steel grades and corresponding yield strengths, main plate thicknesses, applied stress ratios and number of data points in series. For further details on fatigue test, such as specimen geometry, the reader is directed to the references …”

Section: Experimental Datamentioning

confidence: 99%

“…These can be especially harmful because high stresses close to the material yield strength, in tension or compression, can lead to relaxation of the beneficial compressive stresses . Because the fatigue strength improvement obtained with HFMI is considered to depend on the presence of compressive residual stresses, fatigue tests under high stress ratios and variable amplitude loading (VAL) have been recently published . Critical fatigue test data subjected to high mean stresses and spectrum loading have also been created recently in the joint European Research Fund for Coal and Steel (RFCS) project, ‘Improving the fatigue life of high strength steel welded structures by post weld treatments and specific filler material’…”

Section: Introductionmentioning

confidence: 99%

“…[3][4][5] Because the fatigue strength improvement obtained with HFMI is considered to depend on the presence of compressive residual stresses, fatigue tests under high stress ratios and variable amplitude loading (VAL) have been recently published. [6][7][8][9][10][11][12][13][14] Critical fatigue test data subjected to high mean stresses and spectrum loading have also been created recently in the joint European Research Fund for Coal and Steel (RFCS) project, 'Improving the fatigue life of high strength steel welded structures by post weld treatments and specific filler material'. 15 Previous studies on shot and hammer peening clearly show that the beneficial effect of residual stress-based techniques decreases as the applied stress ratio R increases.…”

Section: Introductionmentioning

confidence: 99%

“…In this study, available data for high stress ratios and VAL [6][7][8][9][10][11][12][13][14][15] are evaluated with respect to the proposed guideline for HFMI-treated welded joints 23 and the current IIW recommendation for post-weld improvement 4 using the nominal stress assessment method. Structural stress and local stress approaches for fatigue assessment of both as-welded and improved joints are discussed elsewhere.…”

Section: Introductionmentioning

confidence: 99%

See 4 more Smart Citations

Fatigue assessment of high‐frequency mechanical impact (HFMI)‐treated welded joints subjected to high mean stresses and spectrum loading

Mikkola

Doré

Marquis

et al. 2015

Fatigue Fract Eng Mat Struct

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The fatigue strength of welded joints can be improved with various post‐weld treatment methods. High‐frequency mechanical impact treatment is a residual stress modification technique that creates compressive residual stresses at the weld toe. However, these beneficial residual stresses may relax under certain loading conditions. In this paper, previously published fatigue data for butt and fillet welded joints subjected to high stress ratios and variable amplitude cyclic stresses were evaluated in relation to the current International Institute of Welding (IIW) recommendations on fatigue strength improvement and a proposed IIW design guideline for high‐frequency mechanical impact‐treated welded joints. The evaluation showed that the current IIW recommendations resulted in both non‐conservative and overly conservative fatigue strength estimations depending on the applied stress level, whereas the proposed fatigue assessment guideline fitted the current data well.

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Section: Experimental Datamentioning

confidence: 99%

Section: Experimental Datamentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

See 3 more Smart Citations

Fatigue assessment of high‐frequency mechanical impact (HFMI)‐treated welded joints subjected to high mean stresses and spectrum loading

Mikkola

Doré

Marquis

et al. 2015

Fatigue Fract Eng Mat Struct

View full text Add to dashboard Cite

show abstract

Investigation on experiments and numerical modeling of the residual stress distribution in deformed surface layer of Al6061 alloy after ultrasonic peening treatment

Lak

Vanini

Ghasemi

2022

Materialwissenschaft Werkst

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Ultrasonic peening treatment is a modern technique that enhances the surface properties of the metallic components by imposing static and dynamic loadings. The efficiency of this technique dramatically is dependent on the controlling parameters of ultrasonic peening treatment. In this study, an experimental and numerical investigation on ultrasonic peening treatment was carried out. The numerically predicted residual stress profile was verified using x-ray diffraction measurement. Moreover, a parametric study was performed to investigate the effect of needle diameter, impact number, device moving velocity and static force on residual stress distribution. Based on the results, increasing in needle diameter, impact number and static force had positive effects on residual stress profile. In contrast, higher device moving velocity caused to emerge undesirable effects.

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High‐cycle variable amplitude fatigue experiments and design framework for bridge welds with high‐frequency mechanical impact treatment

2022

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Fatigue enhancement by way of high-frequency mechanical impact (HFMI) treatment can enable effective design and construction of steel bridges. However, bridges may experience high and varying mean stresses, the effects of which are not covered today by any design recommendation or in the literature on HFMI-treated joints. In this study, fatigue experiments were conducted with realistic in-service bridge loading, which revealed the same high fatigue performance as for constant amplitude loading. The effect of mean stress in spectrum loading was quantified and a method to account for it in an equivalent manner is proposed. A design framework has been developed for design and engineering purposes.

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Fatigue strength improvement for ship structures by Ultrasonic Peening

Cited by 45 publications

References 1 publication

Fatigue assessment of high‐frequency mechanical impact (HFMI)‐treated welded joints subjected to high mean stresses and spectrum loading

Fatigue assessment of high‐frequency mechanical impact (HFMI)‐treated welded joints subjected to high mean stresses and spectrum loading

Investigation on experiments and numerical modeling of the residual stress distribution in deformed surface layer of Al6061 alloy after ultrasonic peening treatment

High‐cycle variable amplitude fatigue experiments and design framework for bridge welds with high‐frequency mechanical impact treatment

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