Influence of weld-induced distortions on the stress magnification factor of a thin laser-hybrid welded ship deck panel

Tutkimustuotos: Artikkeli kirjassa/konferenssijulkaisussavertaisarvioitu

Tutkijat

  • A. Niraula
  • M. Rautiainen
  • A. Niemelä
  • I. Lillemäe-Avi
  • Heikki Remes

Organisaatiot

  • Meyer Turku Shipyard
  • LTH Bass

Kuvaus

The limited knowledge about fatigue behavior and lack of analytical solutions for distorted thin plates are predominantly limiting their application today. This paper focuses on finding the most influential distortion parameter that dictates the fatigue strength at the butt weld of a laser-hybrid welded 4 mm thin ship deck panel. A FEA based sensitivity analysis method is employed to identify the influence of the distortion parameters. The results from the experimental validation showed that the distortions of the distorted deck plate on either side of the butt weld could be simplified with 4-point and 3-point splines on longitudinal and transversal direction, respectively. The most important distortion parameters are local angular misalignment, the distortion magnitude and location of local maximum distortion close to the butt weld. The distortion parameters further away from the weld has a minor influence on the structural stress at the butt weld. Furthermore, the results showed that the local angular misalignment can independently provide a better estimate of stress magnification factor km compared to any other distortion parameters.

Yksityiskohdat

AlkuperäiskieliEnglanti
OtsikkoTrends in the Analysis and Design of Marine Structures
AlaotsikkoProceedings of the 7th International Conference on Marine Structures, MARSTRUCT 2019
ToimittajatC.Guedes Soares, J. Parunov
TilaJulkaistu - 8 toukokuuta 2019
OKM-julkaisutyyppiA4 Artikkeli konferenssijulkaisuussa
TapahtumaInternational Conference on Marine Structures - Dubrovnik, Kroatia
Kesto: 6 toukokuuta 20198 toukokuuta 2019
Konferenssinumero: 7

Julkaisusarja

NimiTrends in the Analysis and Design of Marine Structures - Proceedings of the 7th International Conference on Marine Structures, MARSTRUCT 2019

Conference

ConferenceInternational Conference on Marine Structures
LyhennettäMARSTRUCT
MaaKroatia
KaupunkiDubrovnik
Ajanjakso06/05/201908/05/2019

ID: 35666653