Deformation and Torsional Fatigue Behaviour of Steels and Uniaxial Stress Tests

A special issue of Metals (ISSN 2075-4701). This special issue belongs to the section "Metal Failure Analysis".

Deadline for manuscript submissions: closed (31 January 2023) | Viewed by 3442

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Guest Editor
Faculty of Engineering, University of Rijeka, Rijeka, Croatia
Interests: numerical and experimental analysis; finite element method; carbon nanotubes; nanocomposites; fused filament fabrication; material characterization and properties; fatigue; engineering
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Special Issue Information

Dear Colleagues,

Having a good design and knowing the actual lifespan of structures and products is incredibly significant, as any failures have the potential to lead to loss of human lives. As such, it is engineers’ duty to know the exact length of time that all important components of their designs can tolerate a known, repeated stress before they break.

Fatigue is a failure that occurs due to repeated loading and is a common cause of fracture. From an engineering point of view, it is of particular significance to study the field of the causes of cracks and their propagation.

The object of this Special Issue is to address the problems related to the torsional, rotational fatigue behavior of steels, as well as uniaxial stress tests.

Areas to be covered in this Special Issue may include but are not limited to:

  • Torsional, rotational bending fatigue test methods;
  • Standard fatigue test methods;
  • Tensile and creep testing under different conditions;
  • Crack initiation and propagation;
  • Surface fracture analysis.

This Special Issue will hopefully contribute to the collaboration of scientists from different fields of mechanical material characterization and engineering. Different approaches, i.e. analytical, numerical, and experimental, are encouraged and welcome.

Prof. Dr. Marino Brčić
Guest Editor

Manuscript Submission Information

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Keywords

  • fatigue
  • torsional fatigue
  • rotational bending fatigue
  • tensile test
  • uniaxial test
  • mechanical properties
  • creep
  • fracture

Published Papers (2 papers)

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14 pages, 12743 KiB  
Article
Fatigue Resistance Analysis of the Orthotropic Steel Deck with Arc-Shaped Stiffener
by Peng Liu, Yixuan Chen, Hongping Lu, Jian Zhao, Luming An and Yuanqing Wang
Metals 2022, 12(10), 1739; https://doi.org/10.3390/met12101739 - 17 Oct 2022
Cited by 1 | Viewed by 1320
Abstract
The orthotropic steel deck is widely used in long-span steel bridges due to its simplicity and efficiency. The welded joint of the U-rib to e deck panel area is extremely sensitive to fatigue cracks. In this study, an orthotropic steel deck with an [...] Read more.
The orthotropic steel deck is widely used in long-span steel bridges due to its simplicity and efficiency. The welded joint of the U-rib to e deck panel area is extremely sensitive to fatigue cracks. In this study, an orthotropic steel deck with an arc-shape stiffener was proposed that aimed to alleviate the fatigue cracks and enhance the fatigue resistance in long-span steel bridges. Based on the Mingzhu Bay steel bridge, the proposed steel deck FE model was first established. Then, the moving vehicle load was applied to investigate the impact of the arc-shape stiffener on the fatigue stress amplitude and distribution. The Miner fatigue cumulative damage theory was employed to evaluate the fatigue life of the orthotropic steel deck with arc-shaped stiffener, and comparative analyses were carried out. Finally, the results show the maximum stress of the orthotropic steel deck with an arc-shaped stiffener is reduced by 15%, and the fatigue life is improved by 40% compared with the OSD. Full article
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12 pages, 3673 KiB  
Article
Fatigue Performance Evaluation of K-Type Joints in Long-Span Steel Truss Arch Bridge
by Peng Liu, Hongping Lu, Yixuan Chen, Jian Zhao, Luming An and Yuanqing Wang
Metals 2022, 12(10), 1700; https://doi.org/10.3390/met12101700 - 11 Oct 2022
Cited by 1 | Viewed by 1642
Abstract
The K-type joint, which consists of the web members and the chord members with varied angles welded together, has been widely adopted in long-span steel truss bridges. However, its fatigue performance has been rarely considered, despite its critical role in bridge structural safety [...] Read more.
The K-type joint, which consists of the web members and the chord members with varied angles welded together, has been widely adopted in long-span steel truss bridges. However, its fatigue performance has been rarely considered, despite its critical role in bridge structural safety and durability. Accordingly, the FE model of the K-type joint was established in Abaqus and the fatigue performance analysis was conducted, in which the effect of web/chord thickness ratio (τ), chord/web angle (θ), and chord with rib stiffener were investigated. Take the Mingzhu Bay steel truss arch bridge as an engineering background, the hot spot stress method was employed to calculate the fatigue performance of three K-type joints in unfavorable locations. Furthermore, a 3D full-scall bridge model was built to evaluate the fatigue performance of the K-type joints under standard and overloaded moving vehicle load scenarios. The results show that the max hot spot stress factor (SCFmax) of the web and chord member is influenced by τ and θ. The chord members added stiffener is founded to be an effective way to enhance fatigue performance. The fatigue stress intensities of the three unfavorable locations meet the Eurocode 3 specification requirements, but the one in the mid-truss arch is not satisfied under an overloaded vehicle loading rate of 25%. Full article
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