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Abstract

The drive to reduce vehicle mass by substituting mild steel with thinner high strength steel means that design engineers are now working closer to the design limits with respect to the fatigue performance of spot welded structures. Consequently, the present study was initiated to evaluate the factors that influence the fatigue performance of spot welded H sections so as to optimise the performance of spot welded high strength steel structures. The results obtained indicated that steel strength had little effect on fatigue performance while, in contrast, the loading mode, weld size and sheet thickness had a significant influence on it. The results of shear loading were up to 10 times greater compared with that under peel loading conditions. Under shear loading conditions full plug failures were noted, whereas with peel loaded variants partial plug failures predominated. With respect to enhancing the fatigue properties the use of larger weld sizes was shown to be beneficial.

Keywords

SHEAR H SECTION PEEL H SECTION SPOT WELDING FATIGUE PERFORMANCE AUTOMOTIVE DURABILITY LOADING MODE FAILURE MODES

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References

Bhat

S. P.

: ‘Prediction of thickness reduction from fatigue properties of high strength steels’, Paper 840010, SAE, Detroit, USA, 1984.

Barsom

J. M.

, Klippstein

K. H.

and Shoemaker

A. K.

: ‘Fatigue behaviour of sheet steels for automotive applications’, Report 5G80-2, AISI, Committee of Sheet Steel Produces, Washington DC, USA, 1980.

Ellwood

: ‘Fatigue performance of a downgauged high strength steel automotive component’, Engineering Doctorate thesis, University of Wales Swansea, Swansea, UK, 2002.

Hambling

: ‘The fatigue performance of welded components and connectors using high strength steels’, Engineering Doctorate thesis, University of Wales Swansea, Swansea, UK, 2004.

Rupp

, Storzel

and Grubisic

O. P.

: ‘Computer aided dimensioning of spot-welded automotive structures’, Paper 950711, SAE, Detroit, USA, 1995.

Ellwood

and Lewis

: ‘Maximising the fatigue durability of down-gauged high strength steel structures’, (ed. Evans

W. J.

et al), Compass 99, 359-370; 1999, Swansea, UK, University of Wales Swansea.

Sperle

J. O.

: Metal Constr., 1984, 16, (11), 678–679.

Hobbacher

: ‘Fatigue design of welded joints and components’, 1st edn, 3-127; 1996, France, International Institute of Welding.

Toshio

, Tanaka

, Kabasawa

and Nagae

: ‘Fatigue strength of base metal and spot welded joints in HSLA steels for automotive applications’, Report 32, Nissan Kokan Technology Center, 1982.

10.

Hambling

S. J.

, Jones

T. B.

and Fourlaris

: in ‘Fatigue and durability assessment of materials components and structures’, (ed.M. R. Bache et al), 165-172; 2003, Cambridge, EIS Publishing.

11.

Schutz

and Heuler

: ‘The significance of variable amplitude fatigue testing’, (ed. Amzallag

), 201-220; 1994, Philadelphia, PA, USA, ASTM.

12.

Niemand

N. J.

and Wonnenbury

: J. Eng. Integ. Soc., 1997, 22–26.

13.

Lewis

: Mater. World, 1999, 7, (3), 139–140.

14.

Gurney

T. R.

: ‘Fatigue of thin walled joints under complex loading’, Abington Publishing Special Report, Abington Publishing, Cambridge, UK, 1997.

15.

Gao

, Chucas

, Lewis

and McGregor

: ‘Review of CAE fatigue analysis techniques for spot-welded high strength steel automotive structures’, Paper 2001-01-0835, SAE, Warrendale, PA, USA, 2001.

16.

Lewis

: Weld. Met. Fabr., 1996, 64, (7), 275–278.

17.

Davidson

J. A.

and Imhof

E. J.

: ‘The effect of tensile strength on the fatigue life of spot-welded sheet steels’, Paper 840110, SAE, Detroit, USA, 1984.

18.

Waddell

and Williams

N. T.

: ‘Fatigue properties of box sections under bending of torsion’, Report FRW215 — 7 901, Commission of the European Communities Research Agreement.

19.

Shinozaki

, Toshiyutec

and Toshio

: Proc. Int. Conf., Detroit, USA, 1983, SAE, Paper 830032.

20.

‘Specification for resistance spot welding of uncoated and coated low carbon steel’, BS 1140, British Standards Institution, London, UK, 1993.

Influence of steel strength and loading mode on fatigue properties of resistance spot welded H section specimen

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