The thickness effect of welded details improved by high-frequency mechanical impact treatment
Journal article, 2017

High-frequency mechanical impact (HFMI) treatment can enable resource-efficient structural design by improving the fatigue strength of welded joints. While the thickness effect with reference to the fatigue of welded details is well known and covered in design codes, this effect has not been investigated systematically when the welds are improved by HFMI. In this study, experimental data of 582 small-scale fatigue tests on welded details with HFMI treatment has been collected from the literature and evaluated with respect to the thickness effect. In order to separate the effects of yield strength and thickness on the fatigue strength, a new approach was developed to adjust the data to a reference yield strength of 355 MPa prior to thickness evaluation. The test data covered transverse butt welds, details with non-load-carrying transverse attachments and details with non-load-carrying longitudinal attachments. The thickness effect of details with transverse attachments corresponds well with the IIW recommendation of n = 0.2, whereas transverse butt welds have a much weaker thickness effect. Details with longitudinal attachments show a ‘‘reverse” thickness effect.

HFMI

Size effect

Fatigue

Steel

Thickness effect

Author

Poja Shams Hakimi

Chalmers, Civil and Environmental Engineering, Structural Engineering

Halid Yildirim

Chalmers, Civil and Environmental Engineering, Structural Engineering

Mohammad Al-Emrani

Chalmers, Civil and Environmental Engineering, Structural Engineering

International Journal of Fatigue

0142-1123 (ISSN)

Vol. 99 111-124

Areas of Advance

Building Futures (2010-2018)

Subject Categories

Civil Engineering

DOI

10.1016/j.ijfatigue.2017.02.023

More information

Created

10/7/2017