Experimental and Numerical Analyses of Fatigue Behavior of Welded Cruciform Joints

A simple expression is proposed to estimate the fatigue endurance of welded joints that can be used to understand and analyze in a simple way the influence of the main geometrical, mechanical and material effects (weld geometry, local geometry, material properties, residual stresses and size of defects). The proposed expression was derived from the results of the analysis of the fatigue strength of welds studied by means of a fracture mechanics approach that takes into account the fatigue behavior of short cracks by using the resistance curve method. For that purpose numerical simulation of transversely stressed butt, T and cruciform joints were performed.

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Fatigue Behavior of Load-Carrying Fillet Welded Cruciform Joints with Plates of Different Thickness

QUARTERLY JOURNAL OF THE JAPAN WELDING SOCIETY ◽

10.2207/qjjws.22.557 ◽

2004 ◽

Vol 22 (4) ◽

pp. 557-564 ◽

Cited By ~ 2

Author(s):

Shigenobu KAINUMA ◽

Yoshihiro KUSUMOTO ◽

Naofumi HOSOMI ◽

In-Tae KIM

Keyword(s):

Fatigue Behavior ◽

Cruciform Joints ◽

Load Carrying ◽

Different Thickness

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Fatigue behavior of load-carrying cruciform joints with partial penetration fillet welds under three-point bending

Engineering Fracture Mechanics ◽

10.1016/j.engfracmech.2019.05.015 ◽

2019 ◽

Vol 215 ◽

pp. 211-223 ◽

Cited By ~ 2

Author(s):

Reza Ghafoori-Ahangar ◽

Yves Verreman

Keyword(s):

Fatigue Behavior ◽

Fillet Welds ◽

Cruciform Joints ◽

Three Point Bending ◽

Partial Penetration ◽

Load Carrying

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Low- and high-cycle fatigue behavior of load-carrying cruciform joints with incomplete penetration and strength under-match

International Journal of Steel Structures ◽

10.1007/s13296-011-4002-y ◽

2011 ◽

Vol 11 (4) ◽

pp. 409-425 ◽

Cited By ~ 7

Author(s):

Takeshi Hanji ◽

Kawin Saiprasertkit ◽

Chitoshi Miki

Keyword(s):

High Cycle Fatigue ◽

Fatigue Behavior ◽

Cycle Fatigue ◽

Cruciform Joints ◽

Load Carrying

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Fatigue Properties of Cruciform and Flange-gusset Joints Using Normal and High Strength Steels

Periodica Polytechnica Civil Engineering ◽

10.3311/ppci.12435 ◽

2020 ◽

Author(s):

Balázs József Mecséri ◽

Balázs Kövesdi

Keyword(s):

Fatigue Behavior ◽

High Strength Steels ◽

High Strength ◽

Steel Grade ◽

Fatigue Properties ◽

Test Results ◽

Stress Range ◽

Fatigue Lifetime ◽

Cruciform Joints ◽

Normal Strength

The objective of this paper is to investigate and compare the fatigue behavior of Normal Strength Steel (NSS) and High Strength Steel (HSS) welded specimens (cruciform and flange gusset joints). Numerous specimens were tested in the framework of the research project. The experimental S-N curves of the test specimens are determined and analyzed by mathematical statistics to consider the uncertainties and scatter of test results. Statistical analysis of the S-N curves showed that the fatigue behavior of as-welded flange gusset joints is identical in the cases of HSS and NSS specimens, which means that there is no difference in the fatigue lifetime depending on the steel grade. However, the as-welded HSS cruciform joints can be more favorable and their fatigue lifetime is longer than the specimens made from NSS, if the stress range is below 100 MPa. The current study shows that the fatigue behavior of as-welded HSS details depends on the geometry of the investigated specimens and its fatigue lifetime can be larger in the small stress range region than for NSS specimens.

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