In-Service Brittle Fracture Resistance Degradation of Steel in a Ship-to-Shore Portal Crane

Nemchuk, O. O.; Nesterov, Oleksandr

doi:10.1007/s11223-020-00175-w

Cited by 13 publications

(10 citation statements)

References 16 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…This phenomenon can be explained only by taking into account the regularities of the operational degradation of structural steels with the intensive development of dissipated damage in the bulk of the pipe wall. Similar results on low brittle fracture resistance (KCV ≤ 20 J/cm 2 ) were reported for pipeline steels and structural steels of portal cranes [19,29].…”

Section: Assessment Of Steel Sensitivity To Hydrogen Embrittlement In the As-received And Operated Statessupporting

confidence: 84%

“…The orientation of these defects coincides with the fracture plane of transversal specimens (in contrast to longitudinal ones) facilitating the fracture processes, thus, transversal specimens are preferable for testing. This regularity is inherent not only for pipeline steels but also for metal structures of port cranes [29] and pipes of thermal power plants [30]. The latter methodical peculiarity i.e.…”

Section: Methodsmentioning

confidence: 99%

See 1 more Smart Citation

Methodology of hydrogen embrittlement study of long-term operated natural gas distribution pipeline steels caused by hydrogen transport

Nykyforchyn

Zvirko

Hredil

et al. 2021

Frattura Ed Integrità Strutturale

View full text Add to dashboard Cite

A methodology of experimental research on hydrogen embrittlement of pipe carbon steels due to the transportation of hydrogen or its mixture with natural gas by a long-term operated gas distribution network is presented. The importance of comparative assessments of the steel in the as-received and operated states basing on the properties that characterize plasticity, resistance to brittle fracture and hydrogen assisted cracking is accentuated. Two main methodological peculiarities are pointed out, (i) testing specimens should be cut out in the transverse direction relative to the pipe axis; (ii) strength and plasticity characteristics should be determined using flat tensile specimens with the smallest possible thickness of the working part. The determination of hydrogen concentration in metal, metallographic and fractographic analyses have been supplemented the study. The effectiveness of the proposed methodology has been illustrated by the example of the steel research after its 52-year operation.

show abstract

Section: Assessment Of Steel Sensitivity To Hydrogen Embrittlement In the As-received And Operated Statessupporting

confidence: 84%

Section: Methodsmentioning

confidence: 99%

Methodology of hydrogen embrittlement study of long-term operated natural gas distribution pipeline steels caused by hydrogen transport

Nykyforchyn

Zvirko

Hredil

et al. 2021

Frattura Ed Integrità Strutturale

View full text Add to dashboard Cite

show abstract

“…Considering the high cost of full-scale tests, it is necessary to focus on analytical methods and computer modeling when investigating the strength of wagons and individual components of rolling stock [11,[19][20][21].…”

Section: Introductionmentioning

confidence: 99%

Investigation of Coupling Strength at Non-Central Interaction of Railcars

Швець

2022

Strength Mater

View full text Add to dashboard Cite

The strength of the coupling device under the action of operating loads with regard to the non-central interaction of two cars is defined. When longitudinal force is transmitted through the coupler, the points of its possible rotation can be either the upper ribs of the shank end surface or the upper ribs of the damping device body support surface. The tail part of the coupler is under conditions of eccentric compression (or tension) by the force, which is non-parallel to the longitudinal axis. Through any cross-section of the shank, transverse and longitudinal forces are transmitted, applied at a point far from the center of gravity of the section. Using the principle of addition of forces action, a dependence for the definition of the maximum normal stresses in the extreme fibers of the analyzed section of the shank of the coupler, the most distant from the main axis of inertia, has been obtained. The damage to the area of the coupler shank jumper and the bending of the shank in the horizontal and vertical planes, which occur during operation, are justified. Calculation methods make it possible to study the influence of eccentricities of longitudinal force application relative to the coupler axis and the difference of coupler axis levels in the analyzed sections on the magnitude of the compressive operating loads. Application of the obtained results will not only help to ensure the strength of the coupling devices, but will also ensure the freight cars' durability under conditions of increasing train weight and increasing train speed.

show abstract

“…Literature review. It is known that operation of gantry cranes is infl uenced by intensive cyclic load, which leads to development of local plastic deformations in stress concentration areas [5,6]. Such deformations cause low-cycle destructions, boosting multi-cycle destruction and an irregular stressed condition [7].…”

Section: Introductionmentioning

confidence: 99%

Impact of stress concentration on reliability of metal structure elements of gantry cranes

Sahirov¹,

Tkachuk²,

Suglobov³

2022

Nauk. visn. nat. hirn. univ.

View full text Add to dashboard Cite

Purpose. Analyzing the stress distribution in the metal structure of the gantry crane under the cyclic operation mode and identifying stress concentrators in the crane column to assess the survivability of the machine. Methodology. In order to achieve the objective, the methods employed included analytical calculation method, finite element method, as well as differential and integral calculus methods. To study the state of the metal structure of the gantry crane, namely the column, the program Solid Works and its application Simulation were used. Findings. Using the CAD/CAE-system, the loaded condition of the metal structure of the gantry crane was modeled and the maximum working loads were determined, and a calculated scheme of their operation was constructed. The method is presented for calculation of survivability of load-bearing elements of the crane taking into account coefficients of intensity and concentration of stresses which allow defining speed of growth of cracks in dangerous stress zones of a metal structure. Originality. The existing methods for designing crane metal structures gained their traction. The integrated technique for assessing crane reliability has been suggested for the first time. This technique is focused on estimating the survivability of components elements. For the first time solid-state models of the crane and its column have been developed; the analysis of the stress-strain state of the column was performed, maximum stresses were determined, stress concentration points in the metal structure of the column were identified and recommendations for improvement of stress zones were presented. Practical value. The presented method for assessing the reliability of metal structures of gantry cranes can be implemented in the practice of design organizations for the development, design of new gantry cranes and modernization of existing ones. The obtained results provide an opportunity to assess the accumulated damage in the elements of the metal structure, to predict the development of defects to a critical size, as well as to decide on the further operability of a gantry crane.

show abstract

In-Service Brittle Fracture Resistance Degradation of Steel in a Ship-to-Shore Portal Crane

Cited by 13 publications

References 16 publications

Methodology of hydrogen embrittlement study of long-term operated natural gas distribution pipeline steels caused by hydrogen transport

Methodology of hydrogen embrittlement study of long-term operated natural gas distribution pipeline steels caused by hydrogen transport

Investigation of Coupling Strength at Non-Central Interaction of Railcars

Impact of stress concentration on reliability of metal structure elements of gantry cranes

Contact Info

Product

Resources

About