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  • Influence of tensile residual stresses on the high cycle fatigue behaviour (N > 1.0 E7) of welded structures under variable amplitude loading : Properties and operating behaviour


The aim of this project was to investigate the influence of tensile residual stresses on the high cycle fatigue behaviour of welded structures (St 52-3 and St 37-2) under variable amplitude loading. The measurement of residual stresses in St 52-3 specimens showed large differences between the as-welded and stress relieved specimens. However, each material state had a typical strain distribution via the depth. On the specimens made from St 37-2 no reproducible characteristic strain distribution via the depth was found for the as welded state. The lifetime to fracture for both material states is described sufficiently well with the use of the modified damage accumulation theory in the area of less than 2 x 1.0 E7 cycles. Above this value, the fatigue strength is underestimated for both material states.

Additional information

Authors: LBF, LBF, Darmstadt (DE);UNIREC, UNIREC, Centre de Recherches d'Unieux (FR)
Bibliographic Reference: EUR 14652 DE (1994) 130 pp., FS, ECU 16.50
Availability: (2)
ISBN: ISBN 92-826-4066-3
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