Tensile strength and failure simulation of simplified spot weld models

Khandoker, Noman; Takla, Monir

doi:10.1016/j.matdes.2013.08.070

Cited by 26 publications

(14 citation statements)

References 17 publications

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“…Of course, a failure of spot welds affects the performance and stability of a structure significantly, and therefore the strength and/or fatigue life of spot welds as well as the relations between their failure and the dynamic behavior of the structure have been the subject of several investigations. For example, the latter issue is in the focus of the studies [6][7][8][9][10], and static strength and failure analyses of spot welds can be found, e.g., in [11,12]. The influence of the sheet thickness(es) and the spot diameter on the fatigue life is a topic of [13,14], while in [15,16] both various FE-models and the effects of different load cases are studied.…”

Section: Introductionmentioning

confidence: 99%

Efficient frequency-domain based fatigue life estimation of spot welds in vehicle components

Zigo¹,

Arslan

Mack

et al. 2019

Forsch Ingenieurwes

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The estimation of the damage and fatigue life of spot welds in vehicle components with hundreds or thousands thereof within reasonable computation time is a challenge even for recent computers in automotive industry. Hence, an advanced procedure in the frequency-domain is proposed. Whereas the general frequency-domain approach is well-established, it nevertheless becomes efficient for a large number of spot welds only with a package of measures. Among others, a two-scale FE-method using a pre-processed data base for various spot weld/sheet geometries and specified basic load cases, application of the cutting-plane method, and a priori stress estimations to reduce the number of spot welds to be checked completely are suggested. By the example of a tank of a cooling medium in a vehicle it is shown that the proposed algorithm may reduce the computation time as compared to time-domain calculations substantially. Effiziente Frequenzbereichs-Methode zur Abschätzung der Ermüdungsfestigkeit von Schweißpunkten in Fahrzeugkomponenten Zusammenfassung Eine rechenzeitgünstige Lebensdauerabschätzung einer großen Anzahl von Schweißpunkten in Fahrzeugkomponenten stellt auch für moderne Computer eine Herausforderung dar. Es wird deshalb eine neue Vorgehensweise im Frequenzbereich vorgeschlagen. Während die allgemeine Methode wohlbekannt ist, wird sie für große Anzahlen von Schweißpunkten dennoch erst durch mehrere Zusatzmaßnahmen effizient. Es werden unter anderem eine Zweiskalen-FE-Methode unter Verwendung einer Datenbank für diverse Schweißpunkt-/Blechgeometrien unter definierten Einheits-Belastungen vorgeschlagen, Anwendung der Schnittebenenmethode und A-priori-Spannungsabschätzungen zur Reduktion der vollständig zu untersuchenden Schweißpunkte. Am Beispiel eines Kühlmitteltanks in einem Fahrzeug wird gezeigt, daß die vorgeschlagene Vorgehensweise eine signifikante Rechenzeitreduktion gegenüber Zeitbereichs-Berechnungen ermöglicht.

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Section: Introductionmentioning

confidence: 99%

Efficient frequency-domain based fatigue life estimation of spot welds in vehicle components

Zigo¹,

Arslan

Mack

et al. 2019

Forsch Ingenieurwes

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“…However, the majority of studies on the strength of spot welding mainly are focused on tensile-shear tests on joints between sheets [4][5][6][7][8][9][10][11]. Burca and Lucaciu [12] investigated joints between standard M8 nuts made of made of E295 steel and thin (up to 3 mm) sheets of S235J0 steel by the projection welding method of electric welding by pressure derived from spot welding by pressure to which the joint is made by flanges.…”

Section: Introductionmentioning

confidence: 99%

Strength and Microstructure Analysis of Spot Welded Joints between a Sheet and a Nut of Different Steels

Jurgaitis

Česnavičius

Kilikevičius

et al. 2018

mech

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“…Khan investigate the impact performance of spot welds in advanced high strength steels [11]. It is, however, not feasible to perform dynamic lap-shear, cross-tension, and coach-peel tests for constructing a strain-rate dependent failure criterion that describes the behavior of spot welds under impact loading conditions because spot welds in automotive components are subjected to complicated dynamic loading conditions when they undergo crashed deformation [12].…”

Section: Introductionmentioning

confidence: 99%

Influence of Tensile Speeds on the Failure Loads of the DP590 Spot Weld under Various Combined Loading Conditions

Song

Huh

2015

Advances in Materials Science and Engineering

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This paper is concerned with the evaluation of the dynamic failure load of the spot weld under combined axial and shear loading conditions. The testing fixture is designed to impose the combined axial and shear load on the spot weld. Using the proposed testing fixtures and specimens, quasi-static and dynamic failure tests of the spot weld are conducted with seven different combined loading conditions. The failure load and failure behavior of the spot weld are investigated with different loading conditions. Effect of tensile speeds on the failure load of the spot weld, which is critical for structural crashworthiness, is also examined based on the experimental data. The failure loads measured from the experiment are decomposed into the two components along the axial and shear directions and failure contours are plotted with different loading speeds. Dynamic sensitivities of failure loads with various combined loading conditions were also analyzed. Experimental results indicate that the failure contour is expanded with increasing loading speeds and failure loads show similar dynamic sensitivity with respect to the loading angles.

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Tensile strength and failure simulation of simplified spot weld models

Cited by 26 publications

References 17 publications

Efficient frequency-domain based fatigue life estimation of spot welds in vehicle components

Efficient frequency-domain based fatigue life estimation of spot welds in vehicle components

Strength and Microstructure Analysis of Spot Welded Joints between a Sheet and a Nut of Different Steels

Influence of Tensile Speeds on the Failure Loads of the DP590 Spot Weld under Various Combined Loading Conditions

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