Weld arrangement effects on the fatigue behavior of multi friction stir spot welded joints

Hassanifard, Soran; Ahmadi, Samrand Rash; Pour, Masoud Mohammad

doi:10.1016/j.matdes.2012.06.055

Cited by 26 publications

(11 citation statements)

References 20 publications

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“…The failed specimens revealed a shearing fracture as a failure mode in low cycle fatigue and crack propagations normal to the loading direction in high cycle fatigue. The shearing failure mode is more common in high level loads; however, experimental studies have shown that both types of the afore‐mentioned failure modes can occur in single SFW joints as well as multi‐spot friction welded joints . The fatigue tests revealed that all the tested specimens in low cycle and high cycle fatigue zones experienced the same failure modes.…”

Section: Methodsmentioning

confidence: 96%

“…It is noted that there are different relationships suggested between hardness and yield strength. However, a linear relationship was selected for this work as it showed a good level of agreement between the numerical and experimental results of hardness at different zones in our previous studies . Furthermore, by employing a linear relationship, the fatigue parameters of different zones could be evaluated in a simpler way.…”

Section: Fatigue Life Predictionsmentioning

confidence: 99%

“…The results were then used to predict the fatigue life of the welded joints. Further details on modelling the SFW process are given in previous studies .…”

Section: Finite Element Simulationsmentioning

confidence: 99%

See 2 more Smart Citations

Fatigue Life Behaviour of Spot Friction Welded Al 5083‐O in Single Cover Butt Joints

Mohammadpour

Hassanifard

Oskouei

2015

Strain

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In this study, the fatigue behaviour of spot friction welded joints of Al 5083‐O was investigated using experimental and numerical approaches. In the experimental part, a single cover butt joint of aluminium sheets with a thickness of 2 mm was fatigue tested under constant amplitude cyclic loadings. The sheets were connected using a spot friction welding technique with constant welding parameters of tool rotational speed, holding time, travelling speed, and shoulder plunge depth. Fatigue cracks were initiated in the vicinity of the weld notch and then propagated along the circumference of the weld's nugget. In the numerical part, a three‐dimensional finite element model was developed to determine stress and strain distributions in the spot friction welded joint and to predict the fatigue life using three approaches of Morrow, modified Morrow, and Smith–Watson–Topper. The results showed a good agreement between the fatigue life predictions and experimental data.

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Section: Methodsmentioning

confidence: 96%

Section: Fatigue Life Predictionsmentioning

confidence: 99%

See 1 more Smart Citation

Fatigue Life Behaviour of Spot Friction Welded Al 5083‐O in Single Cover Butt Joints

Mohammadpour

Hassanifard

Oskouei

2015

Strain

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“…The model was validated by modeling the tests performed on the spot weld. Hassanifard et al (2013) examined the effects of different arrangement of spot welding on fatigue behavior of spot welding joints. Florea et al (2013) studied the welding parameters affecting the fatigue behavior of spot welding for aluminum alloy 6061-T6 experimentally.…”

Section: Introductionmentioning

confidence: 99%

Fatigue Strength and Fatigue Fracture Mechanism for Spot Welds in U-Shape Specimens

Shariati

Nejad

2016

Lat. Am. j. solids struct.

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In this paper, the fatigue behavior of the metallic welded U-shape specimens subjected to cyclic loading have been investigated via experimental and numerical analysis. To do so, two sets of the spot welded specimens with different sizes were prepared and fatigue tests were conducted under the various cyclic loads. The crack propagation is numerically examined by using the stress intensity factor values achieved from FE analyses. The modified Paris and Forman-Newman-De Koning models were used to estimate the fatigue crack growth rate. The results indicate that the fatigue life of specimens decreases with any increase in load level.

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“…Yan studied the influence of geometric parameters on stress concentration in joints based on finite element analysis (FEA). Hassanifard et al analysed the effects of weld arrangements on the fatigue behaviour of multi friction stir spot welded joints based on the distribution of hardness. The local equivalent stresses and strains near the notch roots of the friction stir spot weld joints were obtained by nonlinear elastic–plastic FEA .…”

Section: Introductionmentioning

confidence: 99%

Fatigue experimental analysis and numerical simulation of FSW joints for 2219 Al–Cu alloy

Sun

Niu

Wang

et al. 2014

Fatigue Fract Eng Mat Struct

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Fatigue properties of friction stir welding (FSW) butt joints for Al–Cu alloy 2219‐T6 were investigated by experimental analysis and numerical simulation. Microstructure characteristics of FSW butt joints for 2219 aluminium alloy were studied during different fatigue stages. Micro hardness values and grain sizes across the FSW joint at different cycles were measured to study the fatigue properties of the joint. Local mechanical performances of the FSW butt joints were investigated based on the micro tensile tests. Fatigue parameters of different regions in the FSW joints were obtained from the four‐point‐correlation method. The local stress and strain response of the FSW joints were obtained based on mechanical performances of the micro tension specimens. The comparison results between simulation and tests analysis show that the built finite element model is effective for estimating the weak areas for FSW joints.

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Weld arrangement effects on the fatigue behavior of multi friction stir spot welded joints

Cited by 26 publications

References 20 publications

Fatigue Life Behaviour of Spot Friction Welded Al 5083‐O in Single Cover Butt Joints

Fatigue Life Behaviour of Spot Friction Welded Al 5083‐O in Single Cover Butt Joints

Fatigue Strength and Fatigue Fracture Mechanism for Spot Welds in U-Shape Specimens

Fatigue experimental analysis and numerical simulation of FSW joints for 2219 Al–Cu alloy

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