Extending the fatigue performance of new and repaired welded T-specimens using High Frequency Mechanical Impact

Kód výsledku v IS VaVaI

<a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F49777513%3A23210%2F25%3A43975795" target="_blank" >RIV/49777513:23210/25:43975795 - isvavai.cz</a>

Výsledek na webu

<a href="https://www.sciencedirect.com/science/article/pii/S0142112325002786?via%3Dihub" target="_blank" >https://www.sciencedirect.com/science/article/pii/S0142112325002786?via%3Dihub</a>

DOI - Digital Object Identifier

<a href="http://dx.doi.org/10.1016/j.ijfatigue.2025.109081" target="_blank" >10.1016/j.ijfatigue.2025.109081</a>

Jazyk výsledku

angličtina

Název v původním jazyce

Extending the fatigue performance of new and repaired welded T-specimens using High Frequency Mechanical Impact

Popis výsledku v původním jazyce

In this study, an experimental investigation was conducted to evaluate the benefit of high-frequency mechanical impact (HFMI) on both newly welded and repaired steel joints. Welded specimens in the as-welded condition, identical specimens treated with HFMI, and HFMI-treated repaired welds were subjected to constant-amplitude cyclic loading until failure. The testing involved structural steel joints representative of typical bridge and shipbuilding details. HFMI treatment was applied along the weld toes using a standard pneumatic impact tool, and all specimens were tested under controlled laboratory conditions to record S–N (stress–life) data. HFMI-treated specimens, including both new and repaired welds, exhibited significantly improved fatigue resistance compared to their as-welded counterparts. Specifically, the HFMI-treated welds endured 2–3 times longer life than as-welded joints under equivalent loading. Additionally, the application of HFMI to repaired welds further extended their fatigue life, demonstrating that HFMI is not only effective in new structures but also offers substantial benefits for welded-joint rehabilitation. The treated joints showed a notable increase in fatigue life and an improvement in the FAT class (allowable stress range at 2 × 10⁶ cycles)

Název v anglickém jazyce

Extending the fatigue performance of new and repaired welded T-specimens using High Frequency Mechanical Impact

Popis výsledku anglicky

In this study, an experimental investigation was conducted to evaluate the benefit of high-frequency mechanical impact (HFMI) on both newly welded and repaired steel joints. Welded specimens in the as-welded condition, identical specimens treated with HFMI, and HFMI-treated repaired welds were subjected to constant-amplitude cyclic loading until failure. The testing involved structural steel joints representative of typical bridge and shipbuilding details. HFMI treatment was applied along the weld toes using a standard pneumatic impact tool, and all specimens were tested under controlled laboratory conditions to record S–N (stress–life) data. HFMI-treated specimens, including both new and repaired welds, exhibited significantly improved fatigue resistance compared to their as-welded counterparts. Specifically, the HFMI-treated welds endured 2–3 times longer life than as-welded joints under equivalent loading. Additionally, the application of HFMI to repaired welds further extended their fatigue life, demonstrating that HFMI is not only effective in new structures but also offers substantial benefits for welded-joint rehabilitation. The treated joints showed a notable increase in fatigue life and an improvement in the FAT class (allowable stress range at 2 × 10⁶ cycles)

Druh

J_imp - Článek v periodiku v databázi Web of Science

CEP obor

—

OECD FORD obor

20301 - Mechanical engineering

Projekt

—

Návaznosti

I - Institucionalni podpora na dlouhodoby koncepcni rozvoj vyzkumne organizace

Rok uplatnění

2025

Kód důvěrnosti údajů

S - Úplné a pravdivé údaje o projektu nepodléhají ochraně podle zvláštních právních předpisů

Název periodika

INTERNATIONAL JOURNAL OF FATIGUE

ISSN

0142-1123

e-ISSN

1879-3452

Svazek periodika

200

Číslo periodika v rámci svazku

NOV 2025

Stát vydavatele periodika

GB - Spojené království Velké Británie a Severního Irska

Počet stran výsledku

13

Strana od-do

nestránkováno

Kód UT WoS článku

001512626100001

EID výsledku v databázi Scopus

2-s2.0-105007185513