Fatigue behavior of square tube-to-plate welded joints in bogie frames: Experimental study and traction structural stress modeling

Yang, Haibo; Wang, Ping; Qian, Hongliang; Dong, Pingsha

doi:10.1016/j.ijfatigue.2022.107216

Cited by 11 publications

(3 citation statements)

References 53 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…The free‐body cut is achieved by using the nodal force/moment directly outputted from FE analysis. Enforcing the work equivalent condition, the resultant line moment

m

and line force

f

can be obtained by solving a set of simultaneous equations, 54 given the nodal force/moment (Figure 1C). Based on the equilibrium condition, the traction stress can be calculated by the following equation 34 :

\begin{matrix} lefttrue \\ σ_{m} = \frac{f}{t}, \\ σ_{b} = \frac{6 m}{t^{2}}, \\ σ_{s} = σ_{m} + σ_{b} . \end{matrix}

…”

Section: Traction Stress Methods and Structural Strain Methodsmentioning

confidence: 99%

A post‐processing procedure for predicting high‐ and low‐cycle fatigue life of welded structures based on the master E–N curve

Liu

Lei

Xing

et al. 2023

Fatigue Fract Eng Mat Struct

View full text Add to dashboard Cite

This work provides a post‐processing procedure to predict the high‐ and low‐cycle fatigue life of welded structures. The post‐processor calculates the equivalent structural strain range, given the traction stress state at the weld notch, by enforcing the equilibrium condition and Navier's hypothesis. The return mapping algorithm is applied to deal with the low‐cycle fatigue condition in which through‐thickness plastic deformation develops. The proposed method predicts the fatigue life of 793 welded joints of different configurations made from steel, magnesium, titanium, and aluminum alloy. The predicted high‐ and low‐cycle fatigue lives agree equally well with the experimental result.

show abstract

“…The free‐body cut is achieved by using the nodal force/moment directly outputted from FE analysis. Enforcing the work equivalent condition, the resultant line moment

m

and line force

f

\begin{matrix} lefttrue \\ σ_{m} = \frac{f}{t}, \\ σ_{b} = \frac{6 m}{t^{2}}, \\ σ_{s} = σ_{m} + σ_{b} . \end{matrix}

…”

Section: Traction Stress Methods and Structural Strain Methodsmentioning

confidence: 99%

A post‐processing procedure for predicting high‐ and low‐cycle fatigue life of welded structures based on the master E–N curve

Liu

Lei

Xing

et al. 2023

Fatigue Fract Eng Mat Struct

View full text Add to dashboard Cite

show abstract

“…The traction structural stress method involves determining the potential failure section of the welded joints based on the stress condition and calculation of the membrane stress and bending stress through static equilibrium conditions to obtain the structural stress. The structural stress of the welded structure can be accurately determined through the finite element software Abaqus 6.14 [ 29 , 30 ].…”

Section: Methodsmentioning

confidence: 99%

Fatigue Performance Analysis of Welded T-Joints in Orthotropic Steel Bridge Decks with Ultrasonic Impact Treatment

Liu,

Huang,

et al. 2023

Materials

Self Cite

View full text Add to dashboard Cite

This study aims to assess the effect of ultrasonic impact treatment (UIT) on the exterior weld seam of S355J2 T-joints used in orthotropic steel bridge decks. The microstructure and mechanical behavior of T-joints after UIT was investigated in this study. Fatigue tests of T-joints before and after UIT were performed. The stress concentration at the interior and exterior weld toe of T-joints was considered using the traction structural stress method. The results showed that hardness increases by 10% due to the localized grain refinement caused by UIT. UIT significantly improves the fatigue life of T-joint specimens by 350% and 150% at stress ratios of 0.1 and 0.3, respectively. As the transition angle between the weld profile and the base metal profile increases, the stress concentration factor decreases.

show abstract

“…The well-known fatigue analysis approaches are nominal stress approaches, structural stress approaches, notch stress approaches, fracture mechanics approaches, etc. [ 17 , 18 ]. Due to the limited test data of standard welded joints, sometimes it is difficult to find appropriate S–N curve data when evaluating non-standard welded joints with the nominal stress method.…”

Section: Introductionmentioning

confidence: 99%

Research on Load Reverse Engineering and Vibration Fatigue Analysis Technology of Rapid Box Wagon

Fang

Zhang

et al. 2022

Materials

View full text Add to dashboard Cite

The overall stiffness and modal frequency of the car body of a rapid box car are reduced by the design of the full-side open movable side door structure. The vibration fatigue performance of the welded structure in this car body needs to be verified. The rigid-flexible coupling model of the rapid box wagon was established first, and the model was verified by modal test data. By the application of the virtual iteration method on this model, the displacement excitation loads of this vehicle were acquired. The effectiveness of the load reverse obtaining technology was verified through the comparison between calculated data and the experimental data. Based on the rigid-flexible coupling model and the load obtained by reverse engineering, the fatigue life of the welded structure in the car body was evaluated through the modal structural stress method. The calculated results show that the car body structure obtains obvious modal vibration, which leads to short fatigue life in several weld lines. According to the application requirements of this wagon, the local improvement scheme was proposed, and the effect of the improvement program was evaluated. In this paper, a new fatigue evaluation technology based on the load reverse method of test data was proposed, which provides a theoretical basis for the structural design and program improvement of railway vehicles.

show abstract

Fatigue behavior of square tube-to-plate welded joints in bogie frames: Experimental study and traction structural stress modeling

Cited by 11 publications

References 53 publications

A post‐processing procedure for predicting high‐ and low‐cycle fatigue life of welded structures based on the master E–N curve

A post‐processing procedure for predicting high‐ and low‐cycle fatigue life of welded structures based on the master E–N curve

Fatigue Performance Analysis of Welded T-Joints in Orthotropic Steel Bridge Decks with Ultrasonic Impact Treatment

Research on Load Reverse Engineering and Vibration Fatigue Analysis Technology of Rapid Box Wagon

Contact Info

Product

Resources

About