Simple but Effective - a Mechanical Methode to Improve the Fatigue Behaviour of Spot Welded High-Strength Steels
- Substantial improvement in the fatigue strength of spot welded high-strength steels has been achieved with the help of a mechanical method, i. e. preloading. Fatigue tests of preloaded tensile shear specimens made from the material H280LA have revealed that their S/N-curves, compared to those of non-preloaded specimens, are not only located at elevated positions, but have flatter slope, too. Low cycle fatigue tests of the triple-spot weld tensile shear specimens examined yielded an increase in fatigue strength of around 50 %. Due to preloading, the notch zones in the spot welded area undergo plastic deformation as a result of high notch stresses. After specimen unloading, compressive stresses arise in this area involving a beneficial specimen behaviour under the load imposed in subsequent fatigue testing, thus causing delayed crack initiation in the spot weld area.
Autor*innen: | Ping Xu |
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Dokumenttyp: | Vortrag |
Veröffentlichungsform: | Präsentation |
Sprache: | Englisch |
Titel des übergeordneten Werkes (Englisch): | The 3rd International Seminar on Advances in Resistance Welding |
Jahr der Erstveröffentlichung: | 2004 |
Veranstaltung: | The 3rd International Seminar on Advances in Resistance Welding |
Veranstaltungsort: | Berlin, Germany |
Beginndatum der Veranstaltung: | 2004-11-16 |
Verfügbarkeit des Dokuments: | Weder Datei noch physisches Exemplar vorhanden ("No Access") |
Datum der Freischaltung: | 19.02.2016 |
Referierte Publikation: | Nein |
Eingeladener Vortrag: | Nein |