Welding deformation and residual stresses in arc welded lap joints by modified iterative analysis

Abstract

Welding residual stresses and deformation in arc welded lap joints of thin steel plates were investigated by both numerical simulation and experimental measurement. A modified iterative substructure method was developed for the large deformation problem with locally strong nonlinearity, and the detailed distribution of welding residual stresses was obtained. It was demonstrated that the deformation mode of the top plate is different from that of the bottom plate. The out of plane deformation along the weld line has a convex shape and that along the transverse section has a concave shape. The strength of the base metal has a large influence on the residual stresses. The efficiency and accuracy of the proposed method have been validated by comparing numerical results with experimental results.

Keywords

Arc welded lap joints Residual stress Welding deformation Measurement Simulation mod-ISM

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References

Pickering

and Hart

: ‘Optimizing resistance spot welding on aluminum-alloy 6111 autobody sheet’, SAE Tech. Pap., 1994, no. 940662.

Chao

Y. J.

: ‘Failure mode of spot welds: interfacial versus pullout’, Sci. Technol. Weld. Joining, 2003, 8, (2), 133–137.

Arul

S. G.

, Pan

, Lin

P. C.

, Pan

, Feng

and Santella

M. L.

: ‘Microstructures and failure mechanisms of spot friction welds in lap-shear specimens of aluminum 5754 sheets’, SAE Tech. Pap., 2005, no. 2005-01-1256.

Lai

, Pan

, Feng

, Santella

and Pan

: ‘Failure mode and fatigue behavior of ultrasonic spot welds with adhesive in lap-shear specimens of magnesium and steel sheets’, SAE Int. J. Mater. Manf., 2013, 6, (2), 279–285.

Kemal Apalak

, Aldas

and Sen

: ‘Thermal non-linear stresses in an adhesively bonded and laser-spot welded single-lap joint during laser–metal interaction’, J. Mater. Process. Technol., 2003, 142, (1), 1–19.

Park

M. K.

, Sindhu

R. A.

and Lee

S. J.

: ‘A residual stress evaluation in laser welded lap joint with hole drilling method’, Int. J. Precis. Eng. Man., 2009, 10, (5), 89–95.

Kong

and Kovacevic

: ‘Finite-element thermal analysis of laser welding of galvanized high-strength steel in a zero-gap lap joint configuration and its experimental verification’, Mater. Process. Technol., 2010, 210, (6), 941–950.

Ono

, Kabasawa

and Omura

: ‘Static and fatigue strength of laser-welded lap joints in thin steel sheet’, Weld. Int., 1997, 11, (6), 462–467.

Nordberg

: ‘Fatigue properties of stainless steel lap joints’, SAE Trans. J. Mater. Manuf., 2006, 114, 675–690.

10.

Newman

J. A.

and Dowling

N. E.

: ‘A crack growth approach to life prediction of spot-welded lap joints’, Fatigue Fract. Eng. Mater. Struct., 1998, 21, (9), 1123–1132.

11.

Miyazaki

and Furusako

: ‘Tensile shear strength of laser welded lap joints’, Nippon Steel Tech. Rep., 2007, 95, 28–34.

12.

Webster

G. A.

and Ezeilo

A. N.

: ‘Residual stress distributions and their influence on fatigue lifetimes’, Int. J. Fatigue, 2001, 23, 375–383.

13.

Deng

, Liang

and Murakawa

: ‘Determination of welding deformation in fillet-welded joint by means of numerical simulation and comparison with experimental measurements’, J. Mater. Process. Technol., 2007, 183, (2), 219–225.

14.

Murakawa

, Oda

, Itoh

, Serizwa

and Shibahara

: ‘Iterative substructure method for fast FEM analysis of mechanical problems in welding’, Prepr. National Meeting JWS, 2004, 75, 274–275.

15.

Ueda

, Murakawa

and Ma (ed.)

: ‘Welding deformation and residual stress prevention’; 2012, Butterworth-Heinemann.

16.

Biswas

, Mahapatra

M. M.

and Mandal

N. R.

: ‘Numerical and experimental study on prediction of thermal history and residual deformation of double-sided fillet welding’, P.I. Mech. Eng. B, 2010, 224B, (1), 125–134.

17.

Deng

, Zhou

, Bi

and Liu

: ‘Experimental and numerical investigations of welding distortion induced by CO₂ gas arc welding in thin-plate bead-on joints’, Mater. Des., 2013, 52, 720–729.