AVOID DAMAGE TO LOADER CRANE COMPONENTS A STUDY OF CONCENTRATION

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Published: Tuesday, 18 April 2023 18:44
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Volume 14 (2), April 2023, Pages 20-28

Rafiq Arabov1, Fariz Gafarov2,  Mahluqa Rahimova3,  Irada Karimova4, Hamidli Anvar5

1Assistent professor of “Mechanical” department, Azerbaijan State Oil and Industry University, Azerbaijan. E.mail: This email address is being protected from spambots. You need JavaScript enabled to view it. 

2Assistent professor of “Mechanical”  department, Azerbaijan State Oil and Industry University, Azerbaijan. E.mail: This email address is being protected from spambots. You need JavaScript enabled to view it.

3Assistent professor of  “Mechanical”  department, Azerbaijan State Oil and Industry University, Azerbaijan. E.mail:  This email address is being protected from spambots. You need JavaScript enabled to view it. 

4Assistent professor of   “Mechanical” department, Azerbaijan State Oil and Industry University, Azerbaijan. E.mail:  This email address is being protected from spambots. You need JavaScript enabled to view it.  https://orcid.org/0000-0002-8488-9104

https://orcid.org/ 0000-0001-6308-0704 

5Magistr, “Mechanical”  department, Azerbaijan State Oil and Industry University, Azerbaijan.

ABSTRACT

 Crane parts work with non-stationary variable loads. The hypothesis of linear summation of fatigue damage during non-stationary cyclic tests is not confirmed. Under the influence of alternating stresses, a process of gradual accumulation of damage occurs, which leads to the formation of cracks of various nature, which gradually increase, forming macroscopic values.

The work is devoted to the study of stress concentratıons leading to damage to crane parts. The results of the research revealed that the set of possible methods for non-stationary modes is not considered valid and was not fully justified from a physical point of view. From a physical point of view, the direction of the ongoing processes is determined by the method of lowering the curtain. However, this method itself requires further development and accuracy. The application of the Dahlgren method is a manner that inaccurately describes the process and its application is incorrect. When choosing materials that work for fatigue in non-stationary modes, along with other characteristics, it is necessary to take into account the criterion of sensitivity to loads.

Keywords: step loading, hypothesis, damage, secondary fatigue curves, experiment.