Investigation of the probabilistic low cycle fatigue design curves at stress cycling

Bazaras, Žilvinas; Česnavičius, Ramūnas; Ilgakojytė-Bazarienė, Jurga; Keršys, Robertas

doi:10.5755/j01.mech.23.2.14358

Cited by 2 publications

(2 citation statements)

References 5 publications

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“…Nowadays, the undisputed favorite of all bridge builders in the world is steel, which has good mechanical properties under various operating conditions under load and is perfectly amenable to processing. It is carbon and low-alloy steels that are the most popular and cost-effective materials, widely used for the construction of small, medium and simply gigantic bridge structures of our time (Bazaras, Cesnavicius, Ilgakojyte-Bazariene, & Kersys, 2017;Lenner, Ryjacek, & Sýkora, 2020;Tkachenko, Tsegelnyk, Myntiuk, & Myntiuk, 2022).…”

Section: What Were the Main Reasons For The Destruction Of Metal Weld...mentioning

confidence: 99%

On the history of the construction of metal bridges in the 20th century using welding technology

Strelko

2023

Hist. sci. technol.

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The history of bridge construction is an important part of historical knowledge. Developments in bridge construction technology reflect not only engineering advances, but also social, economic and cultural aspects of society. Engineers and scientists faced unique challenges when designing and building bridges depending on the technological level of the era, available materials and the needs of society. This process may reflect technological progress, changes in transportation needs, and cultural and social changes. The purpose of this article is to briefly review key moments and stages in the history of metal bridge construction using welding technology in the 20th century. The history of the development of the construction of metal bridges using welding goes back a little over 100 years. The short period from the construction of the first welded bridges to their first disasters led to the need to analyze the possible causes of these destructions. As the analysis performed showed, catastrophic destruction most often occurred under the influence of several factors, as well as a combination of external adverse influences and the internal “unpreparedness” of the structure for them. The above examples indicate that an irrational choice of steel could be both an independent cause causing brittle failure of structures, and an aggravating factor in the presence of structural violations, thermal stresses and welding defects. Over the years, bridge manufacturing technologies have been improved in different countries, and new steels and materials for their welding have been developed. Thanks to the use of carbon, low-alloy and alloy steel, designers abandoned the brutal “railroad-type” beam trusses and today metal bridges with graceful and beautiful silhouettes powerfully stride across the water surface, mountains and valleys. They became real attractions of megacities and country landscapes, and builders were able to successfully solve numerous technical and economic problems. An important contribution to the development of global bridge construction using welding technologies was made by the team of the Institute of Electric Welding of the Academy of Sciences of the Ukrainian SSR under the leadership of Academician Evgeny Oskarovych Paton. The team of the Institute of Electric Welding of the Academy of Sciences of the Ukrainian SSR, introducing welding into bridge construction, carefully checked the results and monitored the behavior of structures. A new grade of steel was created that was resistant to the formation of brittle and fatigue cracks, its welding technology was developed, a technology for installation welding of vertical sheets with forced formation of a seam was developed, and suitable welding materials were selected. At the time of construction in 1953, the Kyiv Evgeny Paton Bridge across the Dnipro River was the largest all-welded bridge in Europe, all seams of which, including assembly ones, were made for the first time using automatic and semi-automatic welding. In addition, the presence of large similar blocks in the design of the Evgeny Paton Bridge made it possible to mechanize assembly and welding operations and organize an in-line method for their production at the factory and installation, which improved the quality of welding work and reduced its labor intensity.

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Section: What Were the Main Reasons For The Destruction Of Metal Weld...mentioning

confidence: 99%

On the history of the construction of metal bridges in the 20th century using welding technology

Strelko

2023

Hist. sci. technol.

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“…4. The load line displacement q and tensile load F were measured by the built-in sensors of the MTS [24][25]. The crack mouth opening displacement (CMOD) of the notch mouth, denoted as δ, was measured by a COD gauge, and the crack propagating process was recorded by a CCD camera.…”

Section: Specimens and Experimental Setupmentioning

confidence: 99%

Experimental and Numerical Study on LCF Crack Propagation of Coiled Tubing Steel

Zhong

Zhao

WANG

et al. 2022

mech

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Coiled tubing (CT) is a joint-less long oil pipe that is wound around a reel and can be run and pulled continuously. Due to the particularity of the operating process, low-cycle fatigue (LCF) failure of the CT constitutes the main production cost. Aiming at the characteristics of small diameter and thin wall of CT, a single-edge-notched (SEN) arc specimen was designed and machined. LCF tests were conducted with force-controlled mode. Cyclic softening of the CT steel was presented and crack growing rates were measured. Meanwhile, finite element simulation was carried out to obtain the relationships among J-integral, crack size and load. Based on the experimental and numerical results, the speed of the LCF crack growth of the CT steel is expressed as an explicit function of the J-integral. It provides a basis for predicting the LCF life of the CT under working conditions from the perspective of crack propagation.

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Investigation of the probabilistic low cycle fatigue design curves at stress cycling

Cited by 2 publications

References 5 publications

On the history of the construction of metal bridges in the 20th century using welding technology

On the history of the construction of metal bridges in the 20th century using welding technology

Experimental and Numerical Study on LCF Crack Propagation of Coiled Tubing Steel

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