Article ID | Journal | Published Year | Pages | File Type |
---|---|---|---|---|
7166982 | Engineering Failure Analysis | 2018 | 6 Pages |
Abstract
The present paper investigates the low cycle fatigue of fillet welds made of high strength weldable steel, Weldox S1100. The investigation was inspired by lifting equipment used in the wind turbine industry, where mobility calls for light weight, making high strength steels the preferred material candidate. Quite often the number of operations for this type of equipment is within a few thousand operations or less before the equipment is obsolete. 4 point bending tests were carried out at stress amplitudes between 500â¯MPa - 1500â¯MPa and at a stress ratio of Râ¯=â¯â1. The results showed that at Nâ¯ââ¯1000-3000â¯cycles there is a distinct drop in fatigue strength, indicating a change of slope of the ÎSâ¯ââ¯N curve. It is also shown that the ultimate tensile strength may be used as the basis for constructing ÎSâ¯ââ¯N curves from static material data.
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Authors
Schjødt-Thomsen J., Andreasen J.H.,