PSI - Issue 23

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Available online at www.sciencedirect.com Structural Integrity Procedia 00 (2019) 000 – 000 Structural Integrity Procedia 00 (2019) 000 – 000

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ScienceDirect

Procedia Structural Integrity 23 (2019) 89–94

© 2019 The Authors. Published by Elsevier B.V. This is an open access article under the CC BY-NC-ND license (http://creativecommons.org/licenses/by-nc-nd/4.0/) Peer-review under responsibility of the scientific committee of the ICMSMF organizers © 201 9 The Authors. Published by Elsevier B.V. This is an open access article under the CC BY-NC-ND license (http://creativecommons.org/licenses/by-nc-nd/4.0/) Peer-review under responsibility of the scientific committee of the IC MSMF organizers. stress ampl tude of given fatigue characteristic and in the result, the fatigue life is calculat d. Sinc the intr duced fatigue c aract ristics are also the function of a umber of cy l to failure the calculati n process of the final lifetime becomes complex. This life d pended m terial parameter concept was successfully impl mented into a few well-known fatigu criteri . The main a m of the paper is the v lidation of two multiaxial fatigue criteria under high cycle fatigue regime with the application of the life dependent material parameters. © 201 9 The Authors. Published by Elsevier B.V. This is an open access article under the CC BY-NC-ND lic nse (http://creativecommon org/licenses/by-nc-nd/4.0/) Peer-review under responsibility of the scientific committee of the IC MSMF organizers. The paper presents the validation of two multiaxial fatigue criteria with the implemented concept of life dependent material parameters. The recent research exhibits that an application of damage parameter defined by multiaxial fatigue criterion to lifetime calculation requires substituting material constants with the fatigue characteristic. The damage parameter is compared with the stress amplitude of given fatigue characteristic and in the result, the fatigue life is calculated. Since the introduced fatigue characteristics are also the function of a number of cycles to failure the calculation process of the final lifetime becomes complex. This life depended material parameter concept was successfully implemented into a few well-known fatigue criteria. The main aim of the paper is the validation of two multiaxial fatigue criteria under high cycle fatigue regime with the application of the life dependent material parameters. The pap r presents the validation of two multiaxial fatigue criteria with the implemented concept of life dep ndent material p rameters. The r cent research exhibits that an pplication of damage p m ter defined by multiaxi l fatigue riterion to lifetim calculation requires substitutin materi l constants with fatigue char cteristic. The damage parameter is compared with th 1. Introduction The non-monotonic time-varying stress state can induce the permanent changes into a material microstructure resulting in the limitation of the operating time of machinery and structures. The mechanisms of material degradation due to fatigue loading are very complex depending on many factors. One of them is the multiaxiality of stress state the impact of that on material damage is evaluated by using an appropriate criterion. The basic part of fatigue life 1. Introduction The non-monotonic time-varying stress state can induce the permanent changes into a material microstructure resulting in the limitation of the operating time of machinery and structures. The echanis s of material degradation due to fatigue loading are very co plex depending on many factors. One of them is the multiaxiality of stress state the impact of that on material damage is evaluated by using an appropriate criterion. The basic part of fatigue life 9th International Conference on Materials Structure and Micromechanics of Fracture Validation of multiaxial fatigue criteria application to lifetime calculation of S355 steel under cyclic bending-torsion loading Krzysztof Kluger a* , Aleksander Karolczuk a , Grzegorz Robak a a Opole University of Technology, Department of Mechanics and Machine Design , Mikołajczyka 5, 45 -271 Opole, Poland 9th International Conference on Materials Structure and Micromechanics of Fracture Validation of multiaxial fatigue criteria application to lifetime calculation of S355 steel under cyclic bending-torsion loading Krzysztof Kluger a* , Aleksander Karolczuk a , Grzegorz Robak a a Opole University of Technology, Department of Mechanics and Machine Design , Mikołajczyka 5, 45 -271 Opole, Poland Abstract Abstract Keywords: Fatigue life calculation; critical plane approach; multiaxial fatigue criteria; cyclic loading Keywords: Fatigue life calculation; critical plane approach; multiaxial fatigue criteria; cyclic loading

* Corresponding author. E-mail address: k.kluger@po.edu.pl * Corresponding author. E-mail address: k.kluger@po.edu.pl

2452-3216 © 2019 The Authors. Published by Elsevier B.V. This is an open access article under the CC BY-NC-ND license (http://creativecommons.org/licenses/by-nc-nd/4.0/) Peer-review under responsibility of the scientific committee of the IC MSMF organizers. 2452-3216 © 2019 The Authors. Published by Elsevier B.V. This is an ope acces article under CC BY-NC-ND lic nse (http://creativecommon org/licenses/by-nc-nd/4.0/)

Peer-review under responsibility of the scientific committee of the IC MSMF organizers.

2452-3216 © 2019 The Authors. Published by Elsevier B.V. This is an open access article under the CC BY-NC-ND license (http://creativecommons.org/licenses/by-nc-nd/4.0/) Peer-review under responsibility of the scientific committee of the ICMSMF organizers 10.1016/j.prostr.2020.01.068