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The fatigue and high speed collapse behaviour of a range of basic engineering box type structures fabricated by resistance welding or weldbonding/adhesive bonding techniques have been investigated to determine the influence of steel thickness, strength and section geometry. In the case of spot welded structures, the influence of weld size, weld shape and weld pitch were determined, whilst for adhesive bonded structures, the effect of adhesive type, flange width and bond-line thickness were studied. It was observed that the optimum fatigue properties of both spot welded and adhesive bonded structures were achieved when the spot weld or the bonded joint was loaded in shear rather than in tension. An increase in sheet thickness led to a marked improvement in the fatigue properties of both spot welded and adhesive bonded structures. Section design appeared to have a lesser influence on the collapse resistance than on the fatigue properties of box-hat sections. In general it was found that structures with either a curved component or a large number of corners gave the best collapse performance. Consequently a lower collapse resistance was recorded with closed top-hat and inserted sections as compared to double box-hat structures. It was also noted that the mode of fracture of adhesive bonded structures was not influenced by a change in section design.

Additional information

Authors: WILLIAMS N T, British Steel Corporation, London (GB)
Bibliographic Reference: EUR 11966 EN (1988) MF, 146 pp., ECU 8, blow-up copy ECU 18.75
Availability: (2)
ISBN: CD-NA-11966-EN-C
Record Number: 198910349 / Last updated on: 1994-12-01
Original language: en
Available languages: en
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