Finite Element Simulation of Stamping a Laser-Welded Blank

Nakagawa, Norihiko; Ikura, Shin; Natsumi, Fumiaki; Iwata, Noritoshi

doi:10.4271/930522

Cited by 19 publications

(6 citation statements)

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“…One method is to use beam elements for representing the weld (Iwata et al , 1995;Nakagawa et al , 1993). However, beam elements limit the geometry that can be represented and the mesh refi nement in the weld zone (Raymond et al , 2004).…”

Section: Finite Element Methods (Fem) Modeling Of the Welded Zonesmentioning

confidence: 99%

Numerical simulation modeling of tailor welded blank forming

Zadpoor

Sinke

Benedictus

2011

Tailor Welded Blanks for Advanced Manufacturing

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Section: Finite Element Methods (Fem) Modeling Of the Welded Zonesmentioning

confidence: 99%

Numerical simulation modeling of tailor welded blank forming

Zadpoor

Sinke

Benedictus

2011

Tailor Welded Blanks for Advanced Manufacturing

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“…The laser butt-welding is more commonly used rather than the mash seam welding. The laser butt-welding method, which provides a higher productivity, narrower weld bead, smaller heat-affected zone (HAZ), lower thermal strain on the weld bead and higher consistence [4], is normally employed to produce TWBs. Material damage affects the forming limit of sheet metals in a way that micro-voids nucleate and grow under external stress field, which accelerate localization process and finally lead to localized necking of the sheet metals.…”

Section: Introductionmentioning

confidence: 99%

Forming Limit of TWBs with Material Damage Consideration - Finite Element Simulation and Experiments

Min

Chow

Chan

et al. 2004

KEM

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Forming limit of tailor-welded blanks (TWBs) is studied experimentally and numerically. TWBs made of JIS G3141 steel were manufactured with laser-welding. Three sets of different thickness ratios were chosen for the investigation. The mechanical properties and damage parameters of the material required for the simulation were measured. A damage coupled plastic model and the damage criterion for localized necking were coded in LS-DYNA through a user-defined material subroutine with detailed procedures. By means of input cards of LS-DYNA, the user-defined history variables can be properly stored and displayed. To illustrate the application of the damage coupled LS-DYNA, the simulation of the TWB forming process was performed. The predicted forming limit strains were found to compare satisfactorily with those obtained from the tests.

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“…Maintaining the linear weld bead straight during forming was required, which represented good forming conditions [11,12]. Applying tailor-welded blanks to the automotive side-frames, the stretch flanging mode around the welded area was known to be detrimental in forming [13,14]. In this study, the authors designed a T-section forming die set resembling the B-pillar lower part of the automobile, and studied the weld line movement, the tearing and the wrinkling behavior of the tailor-welded blanks.…”

Section: Introductionmentioning

confidence: 99%

A study on forming the tailor welded T-section

et al. 2001

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Tears and wrinkles were generated during the forming of a B-pillar, a component of the automotive sideframe. Employing tailor-welded blanks in the B-pillar, a stretch flanging condition gave rise to such forming problems as tearing along the weld bead. The authors simplified B-pillar lower part to a T shaped section to investigate the forming behaviors of the tailor-welded blanks. The effects of the weld line locations and the section end shapes on tearing and wrinkling were studied by way of finite element simulations and several experiments. An appropriate weld bead modeling technique was selected producing a deformation pattern similar to those of the experiments. The concept of the counter-punch was introduced to eliminate body wrinkles.

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Finite Element Simulation of Stamping a Laser-Welded Blank

Cited by 19 publications

References 0 publications

Numerical simulation modeling of tailor welded blank forming

Numerical simulation modeling of tailor welded blank forming

Forming Limit of TWBs with Material Damage Consideration - Finite Element Simulation and Experiments

A study on forming the tailor welded T-section

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