Finite Element Analysis of Residual Stress and Distortion in Laser Welded Stainless Plate

Sundar, M.; Nath, Ashish Kumar; Bandyopadhyay, Debasish; Chaudhuri, S; Dey, Pranab; Misra, Dipten

doi:10.1515/jmbm.2007.18.5-6.363

Cited by 2 publications

(5 citation statements)

References 7 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…To overcome these limitations, this paper considers sequentially coupling CFD and FEM analyses. This is different from most previous sequential models, which consider sequentially coupled thermal and structural analysis [14][15][16][17][18][19], in which the thermal analysis was based on pure-conduction formulations. In the present model, the CFD analysis calculates the thermal history incorporating the melt fiow convection.…”

Section: Introductionmentioning

confidence: 80%

“…These displacements are related to the strain through the strain-displacement matrix [B], and the strains are related to the stresses through the stress-strain matrix [D], so that (18) where [F,,] is the total element force vector, [K^] is the element stiffness matrix and {F'''| is the element thermal load vector. They are expressed as (19) The supporting temperature-dependent material properties were the Young's modulus, Poisson's ratio, coefficient of thermal expansion, and yield stress, whose values as used in the analysis are adapted from Smithells Metals Reference Book [29]. The applied structural boundary conditions were such that all the nodes on the sides of the base plate parallel to the direction of weld were constrained in all directions to simulate clamping effect on the substrate at that location.…”

Section: )mentioning

confidence: 99%

“…Most previous thermo-structural models [14,15,19] use a fixed grid and assume the surface to be flat -or in other words all welds to be perfectly net shaped. The sudden variation of stress along the bead surface (Figs.…”

Section: A-amentioning

confidence: 99%

“…After this work, various studies have been performed on laser welding simulation to investigate the nature of heat transfer, stress distribution and also to understand its physical phenomena. The welding simulation broadly falls in three categories, i.e., heat transfer based on pure conduction model [2][3][4], thermal analysis of welding incorporating the fiuid motion (convection problem) [5][6][7][8][9][10][11][12][13], and the sequentially coupled thermo-structural problem focusing on stress distribution (pure-conduction model with structural analysis) [14][15][16][17][18][19].…”

Section: Introductionmentioning

confidence: 99%

See 3 more Smart Citations

Coupled Computational Fluid Dynamic and Finite Element Multiphase Modeling of Laser Weld Bead Geometry Formation and Joint Strengths

Marimuthu¹,

Eghlio²,

Pinkerton³

et al. 2013

Journal of Manufacturing Science and Engineering

View full text Add to dashboard Cite

Laser welding is used extensively in industry for joining various materials in the assembly of components and structures. Localized melting followed by rapid cooling results in the formation of a weld bead and generation of residual stress. Selection of the appropriate combination of input parameters and understanding their ejfects is important to achieve the required weld quality with a smooth welding surface. In the present work, a sequentially coupled thermo-structural multiphase analysis was carried out with the objectives of predicting the ejfect of laser parameters on the change in surface topology of the weld bead and its subsequent effect on structural properties. The work shows that the laser welding parameters strongly affect the weld bead shape, which eventually affects the weld quality. A net shaped weld bead demonstrates better performance in terms of stress distribution and distortion than other weld bead shapes. The numerical simulation results were compared with the experimental observations performed on a mild steel sheet using a fibre laser and the results are in good agreement in terms of weld bead cross-sectional profile and strength.

show abstract

Section: Introductionmentioning

confidence: 80%

Section: )mentioning

confidence: 99%

Section: A-amentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

See 2 more Smart Citations

Coupled Computational Fluid Dynamic and Finite Element Multiphase Modeling of Laser Weld Bead Geometry Formation and Joint Strengths

Marimuthu¹,

Eghlio²,

Pinkerton³

et al. 2013

Journal of Manufacturing Science and Engineering

View full text Add to dashboard Cite

show abstract

“…They indicated that the finite element method provided results in agreement with the experimental findings. Sundar et al (2007) carried out finite element analysis on a single pass butt-welding model to illustrate the temperature distribution, distortion and residual stress field developed in the weldment. They found that the geometric distortion and residual stress induced during welding can be minimized by selecting appropriate process parameters.…”

Section: Introductionmentioning

confidence: 99%