scholarly journals Selection of Weld Structure of Bogies Based on Sub-Model

2021 ◽  
Vol 2136 (1) ◽  
pp. 012010
Author(s):  
Shuo Guo ◽  
JianGuo Yu ◽  
Shuaishuai Su
Keyword(s):  
Fatigue Strength ◽  
Weld Seam ◽  
Structural Stress ◽  
Present Stage ◽  
Strength Data ◽  
Comparative Tests ◽  
Weld Joints ◽  
Welded Structure ◽  
Weld Structure ◽  
Selection Of

Abstract In order to effectively deal with the problems in the allowable fatigue strength data of weld joints of steering structures, it is necessary to carry out comparative tests and analyses according to various structural stress methods and data. Therefore, on the basis of understanding the applied strength standard of bogie welded structure in China, and aiming at the application of weld structural stress at the present stage, this paper constructs the fatigue diagram and S-N curve of Q345 weld seam based on the actual tested structural stress, and starts with the result study.

Fatigue Bending Strength of Jones Fracture Specific Screw Fixation

2017 ◽  
Vol 39 (4) ◽  
pp. 493-499 ◽  
Author(s):  
James Jastifer ◽  
Kirk A. McCullough
Keyword(s):  
Fatigue Strength ◽  
Bending Strength ◽  
Fatigue Testing ◽  
Screw Fixation ◽  
Optimal Choice ◽  
Fatigue Properties ◽  
Strength Data ◽  
Screw Design ◽  
Jones Fracture ◽  
Significant Difference

Background: Intramedullary screw fixation is a common method of treating proximal metadiaphyseal fifth metatarsal (ie, Jones) fractures. Fatigue failure is a complication of this fixation. There are many screw designs available, including Jones fracture specific fixation, but the optimal choice of screw design is unknown. The purpose of this study was to compare the fatigue strength of Jones fracture specific screw designs as well as other commonly used screw designs. Our hypothesis was that there would be no difference in fatigue strength for Jones fracture specific screw designs at similar screw diameters. Methods: A study was performed to determine the fatigue bending strength of 5 different screw designs including Jones fracture specific screw designs at 3 different screw diameters. Six screws of each size and design underwent cyclic fatigue testing, and a median fatigue limit (MFL) was determined for each screw design and size. Results: The Stryker Asnis JFX solid 4.0-mm, 5.0-mm, and 6.0-mm screws had a higher MFL than all other screws with similar diameter tested (all P < .0001). Both Jones fracture specific screw designs (Stryker Asnis JFX solid screws and Charlotte Carolina Jones screws) had higher MFLs than the other screw designs tested. Conclusion: This study provides comparative fatigue strength data on larger screw diameters, which have not been previously reported. There was a statistically significant difference in screw fatigue properties at the screw diameters tested. Clinical Relevance: The clinical significance of this study is that it provides surgeons with fatigue strength data to aid in screw selection for Jones fracture fixation.

Microstructure, Mechanical and Corrosion Properties of UNS 32205 Duplex Stainless Steel Weldment Joints by Multipass FCAW

2021 ◽  
Vol 58 (6) ◽  
pp. 332-353
Author(s):  
A. Kisasoz ◽  
M. Tümer ◽  
A. Karaaslan
Keyword(s):  
Arc Welding ◽  
Weld Seam ◽  
Electrochemical Corrosion ◽  
Charpy Impact ◽  
Corrosion Properties ◽  
Cored Wire ◽  
Weld Joints ◽  
Flux Cored Arc Welding ◽  
Mechanical And Corrosion Properties ◽  
Stainless Steel Weldment

Abstract In this study, the effect of multipass welding on the microstructure, mechanical and corrosion properties of the UNS 32205 duplex stainless steels (DSS) is investigated. The UNS 32205 DSS is welded in 3 or 7 passes by flux-cored arc welding (FCAW) using E2209 T1 – 1/4 flux cored wire. The weldments are characterized by light optical microscopy (LOM), scanning electron microscopy (SEM), energy dispersive spectroscopy (EDS), Feritscope analysis, Charpy impact tests and electrochemical corrosion tests. The results suggest that the multipass FCAW process induces the formation of γ2 in the weld seam. The mechanical and the corrosion properties of the weld joints are affected by the heat input variation and the phase transformations. Especially, the formation of the γ2 in the weld seam results in a decrease in the corrosion resistance of the joint samples.

scholarly journals Improvement mechanisms of fatigue strength in weld joints by hammer peening

2019 ◽  
Vol 37 (1) ◽  
pp. 17-23 ◽  
Author(s):  
Yasushi MORIKAGE ◽  
Tsunehisa HANDA ◽  
Tetsuya TAGAWA ◽  
Rinsei IKEDA
Keyword(s):  
Fatigue Strength ◽  
Weld Joints ◽  
Hammer Peening

Fussy Assessment of Fatigue Strength of Spot-Welded Structures

2012 ◽  
Vol 562-564 ◽  
pp. 2030-2033
Author(s):  
Yu Xin Yao ◽  
Chun Yuan Shi
Keyword(s):  
Fatigue Life ◽  
Fatigue Strength ◽  
Standard Specimen ◽  
Point Of View ◽  
Fuzzy Mathematics ◽  
Welded Structures ◽  
Coupling Relationship ◽  
Welded Structure ◽  
Assessment Result ◽  
Spot Welded

From the point of view of the objective and scientific design of spot-welded structures, each factor that influences the fatigue strength of the spot-welded structure is quantitatively analyzed using fuzzy mathematics. The weighing coefficient is calculated based on the contribution of each factor and their coupling relationship using DARE method. All the influencing factors are divided to two levels, and quantitative assessment result is obtained. Finally, the fatigue life curve of the spot-welded structure is predicted with the utilization of the fatigue life curve of a standard specimen made of the same material.

Sign in / Sign up

Export Citation Format

Share Document