Modeling of Spot Weld under Impact Loading and Its Effect on Crash Simulation

Saha, Nripen; Mallela, Kiran; Tyan, Tau; Madasamy, Chelliah; Guimberteau, Thierry

doi:10.4271/2006-01-0959

Cited by 5 publications

(2 citation statements)

References 5 publications

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“…A typical vehicle can contain thousands of spot welds [ 2 , 3 ]. Many studies on resistance spot welds have been carried out with regard to their crash safety assessment under the impact loading [ 4 , 5 , 6 , 7 ] and fatigue strength improvement [ 8 , 9 , 10 ]. On the other hand, such a large number of resistance spot welds may induce severe deformation during the assembling process.…”

Section: Introductionmentioning

confidence: 99%

Fast Prediction for Resistance Spot Welding Deformation Using Inherent Strain Method and Nugget Model

Chino¹,

Kunugi²,

Kawashima³

et al. 2021

Materials

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In a car body, there exist thousands of resistance spot welds, which may induce large deformation during the manufacturing process. Therefore, it is expected that automotive industries will develop a method and a computing system for the fast and simple prediction of its deformation. Although the inherent strain method has been used for the fast prediction of arc welding deformation, it has not been applied to resistance spot welding so far. Additionally, the electrical-thermal-mechanical coupling analysis for the deformation induced by resistance spot welding is complicated and much more time-consuming. Therefore, in this study, a nugget model of the resistance spot weld has been developed, and the inherent strain method is extended for use in the fast prediction of resistance spot welding deformation. In addition, the deformation of a vehicle part with 23 resistance spot welds was efficiently predicted within around 90 min using the inherent strain method, displaying good accuracy compared with the measurement.

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Section: Introductionmentioning

confidence: 99%

Fast Prediction for Resistance Spot Welding Deformation Using Inherent Strain Method and Nugget Model

Chino¹,

Kunugi²,

Kawashima³

et al. 2021

Materials

View full text Add to dashboard Cite

show abstract

“…For example, Omar Faruque et al [2] use the spring element with two nodes and six degrees to simulate the spot-weld, and the failure criterions are the spot-weld peak force, displacement, and energy and so on. The research of Honda USA [3] shows that using multi solid elements to simulate the spot-weld is more accurate.…”

Section: Technical Backgroundmentioning

confidence: 99%

Study on the Spot-Weld Failure Prediction Model in Auto Crash Simulation

Xiao¹

2012

Lecture Notes in Electrical Engineering

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The material failure is the essence of the spot-weld failure. TS Model has been constructed by the base material (BM) zone, the heat-affected zone (HAZ) and the nugget, and takes the failure strain as the unique parameter used for judging material failure, so it can be equivalent to the spot-weld failure by simulating the material failure in HAZ. TS Model involves the analysis of five critical problems, which include the spot-weld failure criterion, the reference datum to failure strain, the nugget diameter, the mesh size effect, and the spot-weld material model. TS model takes the material elongation rate as the reference datum of the strain failure. The mesh size in HAZ, which is matched with the material elongation, is determined initially. Meanwhile, the BM consistency assumption is put forward. Finally, the relationship between some factors and the spot-weld failure load has got by TS Model. Because of the simplicity of the failure criterion and the effectiveness of the spot-weld failure prediction, TS Model will have great engineering application value.

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A numerical approach for efficient and accurate modeling of spot‐welding connection in automotive crash analysis

He¹,

Zhang²,

Zhong³

2007

Commun. Numer. Meth. Engng.

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SUMMARYModeling of spot-welding connection is very important in automotive crash analysis, as spot welding is the main approach to assemble the automobile body from hundreds of press-formed components. Although alternative methods are available for modeling the spot welding, new methods are desirable for better efficiency and accuracy. In this paper, a new approach is proposed for the modeling in an explicit analysis environment. Virtual welding nodes are introduced and constructed from actual nodes of the associated finite element. Given constraints are then imposed on the welding nodes using the Lagrange approach. Good accuracy may be obtained while compatibility with the explicit approach is achieved and numerical stability is unaffected for general mesh layout. The approach is implemented in an explicit code and validated with numerical examples.

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Modeling of Spot Weld under Impact Loading and Its Effect on Crash Simulation

Cited by 5 publications

References 5 publications

Fast Prediction for Resistance Spot Welding Deformation Using Inherent Strain Method and Nugget Model

Fast Prediction for Resistance Spot Welding Deformation Using Inherent Strain Method and Nugget Model

Study on the Spot-Weld Failure Prediction Model in Auto Crash Simulation

A numerical approach for efficient and accurate modeling of spot‐welding connection in automotive crash analysis

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