scholarly journals FATIGUE STRENGTH OF NON-LOAD-CARRYING TYPE CRUCIFORM FILLET WELDED JOINT WITH UIT IN CASE OF FAILING FROM WELD ROOT

2019 ◽  
Vol 75 (2) ◽  
pp. 161-174
Author(s):  
Takeshi MORI ◽  
Keita OSUMI ◽  
Takayuki YONEZAWA ◽  
Hiroshi SHIMANUKI
Keyword(s):  
Fatigue Strength ◽  
Welded Joint ◽  
Load Carrying ◽  
Weld Root

Re-evaluation of weld root fatigue strength for load-carrying fillet welded joints using the notch stress concept

2021 ◽  
Vol 144 ◽  
pp. 106076
Author(s):  
Hamidreza Rohani Raftar ◽  
Mohammad Dabiri ◽  
Antti Ahola ◽  
Timo Björk
Keyword(s):  
Fatigue Strength ◽  
Welded Joints ◽  
Notch Stress ◽  
Load Carrying ◽  
Weld Root

scholarly journals On the determination of the bending fatigue strength in and above the very high cycle fatigue regime of shot-peened gears

2021 ◽  
Author(s):  
D. Fuchs ◽  
S. Schurer ◽  
T. Tobie ◽  
K. Stahl
Keyword(s):  
Fatigue Strength ◽  
High Cycle Fatigue ◽  
Load Carrying Capacity ◽  
Cycle Fatigue ◽  
Bending Fatigue ◽  
Very High Cycle Fatigue ◽  
Bending Load ◽  
Load Carrying ◽  
Bending Fatigue Strength ◽  
Very High

AbstractDemands on modern gearboxes are constantly increasing, for example to comply with lightweight design goals or new CO2 thresholds. Normally, to increase performance requires making gearboxes and powertrains more robust. However, this increases the weight of a standard gearbox. The two trends therefore seem contradictory. To satisfy both of these goals, gears in gearboxes can be shot-peened to introduce high compressive residual stresses and improve their bending fatigue strength. To determine a gear’s tooth root bending fatigue strength, experiments are conducted up to a defined number of load cycles in the high cycle fatigue range. However, investigations of shot-peened gears have revealed tooth root fracture damage initiated at non-metallic inclusions in and above the very high cycle fatigue range. This means that a further reduction in bending load carrying capacity has to be expected at higher load cycles, something which is not covered under current standard testing conditions. The question is whether there is a significant decrease in the bending load carrying capacity and, also, if pulsating tests conducted at higher load cycles—or even tests on the FZG back-to-back test rig—are necessary to determine a proper endurance fatigue limit for shot-peened gears. This paper examines these questions.

Effect of strong shot peening cleaning and hot galvanizing on fatigue strength of steel welded joint

2009 ◽  
Vol 23 (5) ◽  
pp. 360-368 ◽  
Author(s):  
Masayoshi Hasegawa ◽  
Hiroaki Suzuki ◽  
Ken Miura
Keyword(s):  
Fatigue Strength ◽  
Shot Peening ◽  
Welded Joint

Bemessungskonzepte für die Ermittlung der Trag- und Ermüdungsfestigkeit von Reparaturschweißungen/Assessment Concepts for Load Carrying Capacity and Fatigue Strength of Repaired Welded Structures

Bauingenieur ◽  
2016 ◽  
Vol 91 (01) ◽  
pp. 34-39
Author(s):  
Jakob Klassen ◽  
Robert Lang ◽  
Gerhard Lener
Keyword(s):  
Fatigue Strength ◽  
Carrying Capacity ◽  
Load Carrying Capacity ◽  
Welded Structures ◽  
Repair Welding ◽  
Load Carrying

Im Zuge des CORNET-Forschungsprojektes „REWESTRUCT – Repair welding of structures“ wurden an der Universität Innsbruck, TU Braunschweig und der BTU Cottbus Versuche und numerische Simulationen zur Trag- und Ermüdungsfestigkeit reparaturgeschweißter Verbindungen von Stahlbauteilen durchgeführt.   Dieser Beitrag präsentiert die Auswertung und Ergebnisse der an der Universität Innsbruck und an der Technischen Universität Braunschweig durchgeführten Versuche und Messungen. In Innsbruck wurden an Großbauteilen im Maßstab 1:1 Schwingfestigkeitsuntersuchungen sowie die dazugehörigen strukturmechanischen Berechnungen vorgenommen. In Braunschweig erfolgte die messtechnische Beurteilung der Eigenspannungen mittels Röntgendiffraktometrie sowie deren numerische Berechnung.   Es zeigt sich dabei, dass ordnungsgemäß durchgeführte Reparaturen zu keiner Minderung der Schwingfestigkeit führen. Die im Zuge von Reparaturen durchgeführten Verbesserungen können im Gegenteil auch zu einer Erhöhung der Schwingfestigkeit führen.

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