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- Automated manufacturing (1)
- Automatisierte Fertigung (1)
- Digitalisierung (1)
- Digitization (1)
- Equivalent stress concentration factors (1)
- Festigkeit (1)
- Hohlprofilknoten (1)
- Kerbspannungskonzept (1)
- Notch stress approach (1)
- Qualitätssicherung (1)
- Schweißnahtgeometrie (1)
- Tubular joints (1)
- Weld seam geometry (1)
- Widerstandspunktschweißen (1)
- quality assurance (1)
- resistance spot welding (1)
- strength (1)
- Äquivalente Spannungskonzentrationsfaktoren (1)
Organisationseinheit der BAM
In einem Forschungsvorhaben wurde der Einfluss von fertigungsbedingten Spalten von bis zu 3 mm auf das Tragverhalten der Widerstandspunktschweißverbindungen aus Stählen am Beispiel von HX340LAD+Z (Werkstoffnummer 1.0933), HCT780X+Z (1.0943), HCT980C (1.0955) und 22MnB5+AS140 untersucht. Neben spaltabhängigen Schweißbereichen wurden auch statische Festigkeit, dynamische Festigkeit sowie Schwingfestigkeit betrachtet. Schließlich wurden ein Prozesssicherheitskoeffizient sowie eine Prozess-Festigkeits-Kenngröße abgeleitet, mit deren Hilfe der Anwender das Verhalten der Punktschweißverbindungen unter Spalteinfluss beurteilen kann.
The development within the offshore wind energy sector towards more powerful turbines combined with increasing water depth for new wind parks is challenging both, the designer as well as the manufacturer of support structures. Besides XL-monopiles the jacket support structure is a reasonable alternative due to the high rigidity combined with low material consumption. However, the effort for manufacturing of the hollow section joints reduces the economic potential of jacket structures significantly. Therefore, a changeover from an individual towards a serial production based on automated manufactured tubular joints combined with standardized pipes must be achieved. Hence, this paper addresses the welding process chain of automated manufactured tubular joints including digitization of the relevant manufacturing parameters such as laser scanning of the weld seam geometry. Additionally, a methodology for the computation of the notch radius as well as the weld seam angle is presented based on the scanned profiles of three analysis points of an automated manufactured tubular X-joint. Subsequently, these parameters are considered within the notch stress approach based fatigue design and their impact is quantified by a comparison with the structural stress approach using equivalent stress concentration factors.