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1 Journal of New Technologies in Environmental Science

1 2018

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Features of calculation of durability of machine parts and structural elements under conditions of high asymmetric low-amplitude loads

Artym V. I., Faflei O. Y., Mykhailiuk V. V., Semenchuk A. V., Deineha R. O., Yatsyniak I. I.

Journal of New Technologies in Environmental Science

2018

Vol. 2, nr 1

47--57

As is known, the process of loading a large number of structures and machinery parts is characterized by a large scatter of asymmetrical stress cycles along its length and in time. In full measure it concerns the elements of the drill string, particularly when drilling deep holes. Therefore, the vast majority of experiments on the determination of the parameters of fatigue resistance is carried out at a symmetric cycle of stresses as a necessary step to calculate the strength of elements of columns, to bring asymmetrical cycles to the equivalent symmetrical.