A Simplified Model for the Effect of Weld-Induced Residual Stresses on the Axial Ultimate Strength of Stiffened Plates

Abstract

The present work investigates the compressive axial ultimate strength of fillet-welded steel-plated ship structures subjected to uniaxial compression, in which the residual stresses in the welded plates are calculated by a thermo-elasto-plastic finite element analysis that is used to fit an idealized model of residual stress distribution. The numerical results of ultimate strength based on the simplified model of residual stress show good agreement with those of various methods including the International Association of Classification Societies (IACS) Common Structural Rules (CSR), leading to the conclusion that the simplified model can be effectively used to represent the distribution of residual stresses in steel-plated structures in a wide range of engineering applications. It is concluded that the widths of the tension zones in the welded plates have a quasi-linear behavior with respect to the plate slenderness. The effect of residual stress on the axial strength of the stiffened plate is analyzed and discussed.

Keywords

Fillet weld / Finite element analysis / Residual stress / Ultimate strength

References

[1] Chen BQ, Guedes Soares C. Effects of plate configurations on the weld induced deformations and strength of fillet-welded plates. Mar Struct, 2016, 50: 243-259

[2] Chen BQ, Guedes Soares C. Effect of welding sequence on temperature distribution, distortions, and residual stress on stiffened plates. Int J Adv Manuf Technol, 2016, 86: 3145-3156

[3] Chen BQ, Hashemzadeh M, Guedes Soares C. Numerical and experimental studies on temperature and distortion patterns in butt-welded plates. Int J Adv Manuf Technol, 2014, 72: 1121-1131

[4] Chen BQ, Hashemzadeh M, Garbatov Y, Guedes Soares C. Numerical and parametric modeling and analysis of weld-induced residual stresses. Int J Mech Mater Des, 2015, 11: 439-453

[5] Cui W, Mansour AE. Effects of welding distortions and residual stresses on the ultimate strength of long rectangular plates under uniaxial compression. Mar Struct, 1998, 11: 251-269

[6] Deng D, Liang W, Murakawa H. Determination of welding deformation in fillet-welded joint by means of numerical simulation and comparison with experimental measurements. J Mater Process Technol, 2007, 183: 219-225

[7] Gannon L, Liu Y, Pegg N, Smith MJ. Effect of welding sequence on residual stress and distortion in flat-bar stiffened plates. Mar Struct, 2010, 23: 385-404

[8] Gannon L, Liu Y, Pegg N, Smith MJ. Effect of welding-induced residual stress and distortion on ship hull girder ultimate strength. Mar Struct, 2012, 28: 25-49

[9] Garbatov Y, Saad-Eldeen S, Guedes Soares C. Hull girder ultimate strength assessment based on experimental results and the dimensional theory. Eng Struct, 2015, 100: 742-750

[10] Goldak JA, Chakravarti A, Bibby MJ. A new finite element model for welding heat source. Metall Trans B, 1984, 15B: 299-305

[11] Gordo JM, Guedes Soares C. Experimental evaluation of the behaviour of a mild steel box girder under bending moment. Ships Offshore Struct, 2008, 3: 347-358

[12] Gordo JM, Guedes Soares C, Faulkner D. Approximate assessment of the ultimate longitudinal strength of the hull girder. J Ship Res, 1996, 40: 60-69

[13] Guedes Soares C. Design equation for the compressive strength of unstiffened plate elements with initial imperfections. J Constr Steel Res, 1988, 9: 287-310

[14] Guedes Soares C. Design equation for ship plate elements under uniaxial compression. J Constr Steel Res, 1992, 22: 99-114

[15] Guedes Soares C, Gordo JM. Compressive strength of rectangular plates under biaxial load and lateral pressure. Thin-Walled Struct, 1996, 24: 231-259

[16] Guedes Soares C, Gordo JM. Design methods for stiffened plates under predominantly uniaxial compression. Mar Struct, 1997, 10: 465-497

[17] International Association of Classification Societies Common structural rules for bulk carrier, 2006, London: IACS

[18] Khan I, Zhang S. Effects of welding-induced residual stress on ultimate strength of plates and stiffened panels. Ships Offshore Struct, 2011, 6: 297-310

[19] Mondal AK, Biswas P, Bag S. Influence of tacking sequence on residual stress and distortion of single sided fillet submerged arc welded joint. J Mar Sci Appl, 2015, 14: 250-260

[20] Paik JK, Sohn JM. Effects of welding residual stresses on high tensile steel plate ultimate strength: nonlinear finite element method investigations. J Offshore Mech Arct Eng, 2012, 134(2):

[21] Saad-Eldeen S, Garbatov Y, Guedes Soares C. Experimental assessment of corroded steel box-girders subjected to uniform bending. Ships Offshore Struct, 2013, 8: 653-662

[22] Smith CS (1977) Influence of local compressive failure on ultimate longitudinal strength of a ship’s hull. Proceedings of the International Symposium on PRADS, Tokyo, Japan, 73–79

[23] Smith CS, Anderson N, Chapman JC, Davidson PC, Dowling PJ. Strength of stiffened plating under combined compression and lateral pressure. Trans RINA, 1992, 134: 131-147

[24] Ueda Y, Masaoka K. Ultimate strength analysis of thin plated structures using eigen-functions (2nd report): rectangular plate element with initial imperfection. J Soc Naval Architects Jpn, 1995, 178: 463-471 In Japanese)

[25] Yao T, Nikolov PI. Progressive collapse analysis of a ship’s hull under longitudinal bending. J Soc Naval Architects Jpn, 1991, 1991(170): 449-461

[26] Yao T, Astrup OC, Caridis P, Chen YN, Cho SR, Dow RS et al (2000) Ultimate hull girder strength. ISSC Special Task Committee VI.2, Proceedings of the 14th International Ship and Offshore Structures Congress, Nagasaki, Japan