On strength criteria of fillet welds

Picón, Rafael; Cañas, J. A.

doi:10.1016/j.ijmecsci.2009.06.003

Cited by 17 publications

(5 citation statements)

References 21 publications

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“…21 However, almost all these recent developments have been focused upon evaluation of fatigue of welded joints dominated by weld toe cracking and only to a limited extent by weld root cracking. 23 As far as static shear failure is concerned, an existing body of knowledge such as those by Kato and Marta 5 and many others 12–19 suggests that a direct application of conventional elastic stress analysis procedures in characterizing static shear failure is not adequate due to significant plastic deformation proceeding to typical static shear failures. Instead of pursuing detailed elastic–plastic stress analysis procedures already demonstrated by various earlier researchers, 12–19 this paper will focus upon extending the existing nodal force based traction stress method 20,21 to applications for characterizing static shear strengths.…”

Section: Traction Stress Methodsmentioning

confidence: 99%

“…There have been numerous attempts in the literature to develop analytical arguments so that the two aforementioned issues can be effectively addressed for an improved understanding of static shear failure behaviors in fillet-welded joints and an effective interpretation of shear strength test data from standardized shear test specimens. 12–19 For instance, a finite element based limit analysis procedure was recently used for standard longitudinal and transverse test specimens; 18 Miazga and Kenney 15 conducted a detailed experimental and finite element investigation by systematically varying loading angle of a series of specimens varying from standard transverse shear to longitudinal shear. Although with a varying degree of success, the results available so far cannot be easily generalized due to various assumptions made, some of which are rather questionable.…”

Section: Introductionmentioning

confidence: 99%

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A traction stress based shear strength definition for fillet welds

Nie

Dong

2012

The Journal of Strain Analysis for Engineering Design

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In this paper, a traction stress based shear strength definition is presented for correlating weldment test data obtained from standard specimens such as those stipulated by AWS B4.0 as well as for applications in general structural design applications when finite element methods are used. With this proposed approach, well-documented discrepancies in shear strength between transverse and longitudinal shear tests can now be reconciled, resulting in a single shear strength value regardless of specimen types and loading conditions. The method should provide a basis for achieving a quantitative weld sizing in fillet weld design for structural applications. The paper starts with a brief description of major issues associated with strength data interpretation using the conventional shear stress formula given in AWS B4.0 which is widely used by various industries. After posing a series of candidate static failure criteria, an existing finite element solution technique for dealing with stress concentration effects on fatigue is then extended for applications in determining stress parameters that can be related to shear strength in standard shear test specimens. A large amount test data are then analyzed to judge the most appropriate failure criteria for shear strength characterization of fillet welds. An analytical solution is also developed both for validating the proposed shear strength definition and for gaining theoretical insights, e.g. on stress/strength relationship as a function of fillet weld and fillet weld geometry.

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Section: Traction Stress Methodsmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

A traction stress based shear strength definition for fillet welds

Nie

Dong

2012

The Journal of Strain Analysis for Engineering Design

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“…For fillet welded joints, mechanical properties [11][12][13][14][15][16] and even strength criterion [17][18][19] have been studied and proposed successfully, but most of them were concentrated on mild steels with lower yield strength. Based on the strength criterion of mild steel, only Eurocode 3 Part 1-12 [20] extends the design rules to cover the steel grades up to S700 and also allows the use of undermatched filler metals.…”

Section: Introductionmentioning

confidence: 99%

Comparison of mechanical behavior between longitudinal lap-welded joints and transverse fillet welded joints of high strength steel

2022

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Mechanical behavior of twenty-eight longitudinal lap-welded joints made of high strength steels (HSS) under tension load was investigated by experimental study. Weaknesses due to traditional deformation measurements for fillet welded joints can be perfectly solved by digital image correlation techniques (DIC). The effect of parameters (e.g. weld size, weld length and mismatch ratio) on mechanical properties (e.g. ultimate strength, failure modes, weld ductility and fracture angle) of longitudinal fillet welds and transverse fillet welds, which was introduced in detail in previous work by the authors, were compared. Generally, because of the difference on the combination of shear force and tension force, the fracture angle of longitudinal welded specimens (around 50) were much more divergent from transverse welded specimens (around 20) even though both of them failed at welded zone (welded zone only refers to weld metal in this paper), resulting that the mean strength of longitudinal welded specimens were only 0.58 time of transverse welded specimens. Conversely, the mean deformation capacity of longitudinal welded specimens was almost 4.0 times of transverse welded specimens. Moreover, it was confirmed that the predicted loads of EC3 and AISC Specification were close and slightly conservative for all specimens.

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“…Therefore, one of the most important design considerations for ship and offshore structures is to ensure that load-carrying fillet welds possess a strength equal to or higher than that of nearby base plates, as described in US Navy's weld sizing criteria, such as MIL-STD-1628 [1] and further refined by Krumpen [2] for meeting weld sizing needs as high strength steels and modern welding processes were being introduced. Today, there are numerous fillet weld design guidance documents available, such as ABS 96 [3] for naval vessel applications, Eurocode 3 [4] and IIW [5] for general structural applications, as recently discussed by Pic on and Cañas [6] in which a limit analysis based strength evaluation procedure was also presented in the context of elasticeplastic finite element analysis. However, the basic assumptions in calculating fillet weld throat stress for strength characterization purpose remain the same as those given in AWS B4.0 [7], i.e., by assuming a failure angle of 45 from base plate and a uniform throat stress distribution along weld line.…”

Section: Introductionmentioning

confidence: 99%