Fatigue Strength of Longitudinal Joints for All Steel Sandwich Panels

1999 ◽  
pp. 837-844 ◽  
Author(s):  
P. Kujala ◽  
K. Kotisalo
Keyword(s):  
Fatigue Strength ◽  
Sandwich Panels ◽  
Longitudinal Joints

Influence of Nonsymmetric Steel Sandwich Panel Joints on Response and Fatigue Strength of Passenger Ship Deck Structures

2017 ◽  
Vol 33 (02) ◽  
pp. 135-143
Author(s):  
Jani Romanoff ◽  
Sören Ehlers ◽  
Heikki Remes
Keyword(s):  
Fatigue Strength ◽  
Sandwich Panel ◽  
Sandwich Panels ◽  
Local Stress ◽  
Element Model ◽  
Design Criterion ◽  
Hull Girder ◽  
Notch Stress ◽  
Panel Stiffness ◽  
Passenger Vessel

Present paper investigates the factors contributing to the stress response of steel sandwich panel deck joints when applied into the hull girder of modern passenger vessel. The emphasis is put on the fatigue analysis, which is the critical design criterion in application of these structures to ships. Two types of joints are considered, i.e., a symmetrical and a nonsymmetrical prismatic joint with respect to the geometrical midplane of the sandwich panel. Stiffness properties are derived for the joints in order to enable the modeling of sandwich structures as part of the hull girder finite element model. The influence of sandwich joints to hull girder response is studied. Notch stress analysis is used for the fatigue strength estimation. The applicability of notch stress method for steel sandwich panels is validated with experiments. The investigation shows that the fatigue strength of steel sandwich panels does not depend only on local stress concentration factors at details, but also on the global stiffness of the structural hull girder system, the sandwich panels, and thus the joint response must be taken into account.

Fatigue strength of cruciform joints and longitudinal joints with laser-arc hybrid welding

2019 ◽  
Vol 63 (5) ◽  
pp. 1379-1390 ◽  
Author(s):  
Takeshi Hanji ◽  
Kazuo Tateishi ◽  
Masaru Shimizu ◽  
Daisuke Uchida ◽  
Koichi Asano ◽  
...  
Keyword(s):  
Fatigue Strength ◽  
Hybrid Welding ◽  
Cruciform Joints ◽  
Longitudinal Joints
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