PSI - Issue 40

ScienceDirect Structural Integrity Procedia 00 (2022) 000 – 000 Structural Integrity Procedia 00 (2022) 000 – 000 Available online at www.sciencedirect.com Available online at www.sciencedirect.com ScienceDirect Available online at www.sciencedirect.com ScienceDirect

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Procedia Structural Integrity 40 (2022) 411–417

15th International Conference on Mechanics, Resource and Diagnostics of Materials and Structures Computational and experimental method for determining the cyclogram parameters of the loading products 15th International Conference on Mechanics, Resource and Diagnostics of Materials and Stru tures Computational and experimental method for determining the cyclogram parameters of the loading products

Syzrantsev V.N. a *, Syzrantseva K.V. a , Muratov K.R. a a Industrial University of Tyumen, 38, Volodarsky street, Tyumen, 625000, Russia Syzrantsev V.N. a *, Syzrantseva K.V. a , Muratov K.R. a a Industrial University of Tyumen, 38, Volodarsky street, Tyumen, 625000, Russia

© 2022 The Authors. Published by Elsevier B.V. This is an open access article under the CC BY-NC-ND license (https://creativecommons.org/licenses/by-nc-nd/4.0) Peer-review under responsibility of the scientific committee of the15th International Conference on Mechanics, Resources and Diagnostics of Materials and Structures. Abstract The computational and experimental procedure for determining the parameters of the loading cyclogram is proposed for the random deformation process of the products in operation. It is based on the use of the nonparametric statistics and da-ta on changes in the electrical resistance of fatigue damage sensors. © 2022 The Auth ors. Published by ELSEVIER B.V. This is an open access article under the CC BY-NC-ND license (https://creativecommons.org/licenses/by-nc-nd/4.0) Peer-review under responsibility of the scientific committee of the15th International Conference on Mechanics, Resource and Diagnostics of Materials and Structures. Keywords: random process of loading, nonparametric evaluation, loading cyclogram, fa-tigue damage sensors, equivalent number of cycles. 1. Introduction In the product operation the process of time variation of external loads is random, shown by Zahiri (2017), Syzrantseva (2019), Dvoynikov (2016), Papadogiannis (2017), Rasha (2017) and Evgrafov (2017). For a number of products, such as gas pipelines, the stress distribution density function cannot be described [Syzrantsev (2019), Sokolov (2016)] using the laws of random values developed in the framework of the theory of parametric statistics. Moreover, for such processes, the concept of a load (stress) variation cycle becomes uncertain. The above indicates that it is not possible to predict the residual life of products taking into account their actual loading under operating conditions on the basis of the fatigue curve. Abstract The computational and experimental procedure for determining the parameters of the loading cyclogram is proposed for the random deformation process of the products in operation. It is based on the use of the nonparametric statistics and da-ta on changes in the electrical resi tance of fatig e damag sensors. © 2022 The Auth ors. Published by ELSEVIER B.V. This is an open access article under the CC BY-NC-ND license (https://creativecommons.org/licenses/by-nc-nd/4.0) Peer-review u der re ponsibility of scientific committe of the15th International C ference on Mechanics, Resource and Diagnostics of Materials and S ructur s. Keywords: random process of loading, nonparametric evaluation, loading cyclogram, fa-tigue damage sensors, equivalent number of cycles. 1. Introduction In the product operation the process of time variation of external loads is random, shown by Zahiri (2017), Syzrantseva (2019), Dvoynikov (2016), Papadogiannis (2017), Rasha (2017) and Evgrafov (2017). For a number of produc , such as gas pipelines, the stress distr bution density function cannot be described [Syzrantsev (2019), Sokolov (2016)] using the laws of random values develop d n the framework f the theo y of parametric statistics. More er, for such processes, the co cept of a loa (stress) variation cycle bec mes unce tain. The above ind cates that it is not possible t predict the residual life f products tak ng i to account th ir actual loading under operating conditions on the asis of the fatigue curve.

* Corresponding author. Tel.: +7-345-228-3013. E-mail address: v_syzrantsev@mail.ru * Corresponding author. Tel.: +7-345-228-3013. E-mail address: v_syzrantsev@mail.ru

2452-3216 © 2022 The Authors. Published by ELSEVIER B.V. This is an open access article under the CC BY-NC-ND license (https://creativecommons.org/licenses/by-nc-nd/4.0) Peer-review under responsibility of the scientific committee of the15th International Conference on Mechanics, Resource and Diagnostics of Materials and Structures. 2452-3216 © 2022 The Authors. Published by ELSEVIER B.V. This is an open access article under the CC BY-NC-ND license (https://creativecommons.org/licenses/by-nc-nd/4.0) Peer-review u der responsibility of t scientific committe of the15th Int rnational C ference o Mechanics, Resource and Diagnostics of Materials and Structures.

2452-3216 © 2022 The Authors. Published by Elsevier B.V. This is an open access article under the CC BY-NC-ND license (https://creativecommons.org/licenses/by-nc-nd/4.0) Peer-review under responsibility of the scientific committee of the15th International Conference on Mechanics, Resources and Diagnostics

of Materials and Structures. 10.1016/j.prostr.2022.04.055