A Metallurgical Concept for Numerical Simulation of Arc Welding

Chau, Truong-Linh

doi:10.1115/pvp2005-71654

Cited by 2 publications

(6 citation statements)

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“…The Methodology has been developed on a Metallurgical Concept [2][3][4][5][6][7][8] issued from two main diagrams of mild steel (usual ordinary iron-carbon steels): metallurgical phase transformation diagram and dilatation diagram.…”

Section: Short Presentation Of the Methodology For Numerical Simulation Of Arc Weldingmentioning

confidence: 99%

“…The Metallurgical Concept, based on two main diagrams of iron-carbon steel, is illustrated in the following Schematic Analysis (Figure 3) [2][3][4][5][6][7][8].…”

Section: Metallurgical Conceptmentioning

confidence: 99%

“…4) etc. before welding assembly operations [2][3][4][5][6][7][8] and it is evaluated by the modified Euler-Bryan's formula as below : 12) where :…”

Section: )mentioning

confidence: 99%

“…K c = corrector coefficient, estimated to be (0.75 < K c < 1); = 0,75 for "coil" platings (updated value [8] issued from the RD project [10]) In shipbuilding, the coil platings of deck and bulkhead stiffened panels are generally assumed to be under one of these two cases of boundary conditions (Fig. 4 and 5): 8) Idealization of welded joint sections and building up 3D finite element models : Two of the most used welded joints for fabrication of stiffened panels are Fillet and Butt welds.…”

Section: )mentioning

confidence: 99%

“…Carried out from RD studies in 1991-1995 [1], the Methodology of numerical simulation of arc welding, based on a metallurgical concept, had been presented successively in 1992 [2], 1999 [3], 2000 [4], 2003 [5,6], 2004 [7], reviewed and updated in 2005 [8]. Two industrial applications of the methodology in shipbuilding are described in this paper using its main basic assumptions for verifying the excessive distortions due to welding effects occurred on thin welded stiffened plate panels.…”

Section: Introductionmentioning

confidence: 99%

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Welding Effects On Thin Stiffened Panels

Chau

Residual Stress and Its Effects on Fatigue and Fracture

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The major problems due to welding effects are the residual stresses and distortions of which the levels affect more or less the resistance and lifetime of welded structure. In steel industry and particularly in shipbuilding, during these last few decades, thin plates are used more and more in ship construction in order to lighten the structure weight. Unfortunately, excessive distortions occurred on these thin stiffened panels and straightening works must be executed in respecting the limit tolerance fixed by the Quality Standard of Ship Construction. These futil works reduce Productivity and Quality, increase Construction Cost and get longer Fabrication Delay. Thus, it is necessary to evaluate, control and minimize the distortion and stress levels of thin welded panels before welding assembly operations. In this paper, a short presentation of the Methodology and its industrial applications in shipbuilding are presented for two panels of a Chemical Parcel Tanker (1996) and a large "Testing" Panel in full scale of a Passsengers Ship (2002). The numerical results due to welding effects so obtained within short computer-time (three hours and half for a 3D FE model of more than two million of degrees of freedom) ) on a linear FEM software were verified with measured stress values and identified with the buckling state of the "Testing" Panel before and after welding operations by photographies.

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Section: Short Presentation Of the Methodology For Numerical Simulation Of Arc Weldingmentioning

confidence: 99%

“…The Metallurgical Concept, based on two main diagrams of iron-carbon steel, is illustrated in the following Schematic Analysis (Figure 3) [2][3][4][5][6][7][8].…”

Section: Metallurgical Conceptmentioning

confidence: 99%

“…4) etc. before welding assembly operations [2][3][4][5][6][7][8] and it is evaluated by the modified Euler-Bryan's formula as below : 12) where :…”

Section: )mentioning

confidence: 99%

Section: )mentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

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