PSI - Issue 21

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

www.elsevier.com/locate/procedia

www.elsevier.com/locate/procedia

ScienceDirect

Procedia Structural Integrity 21 (2019) 101–111

© 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 1st International Workshop on Plasticity, Damage and Fracture of Engineering Materials organizers © 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 1st International Workshop on Plasticity, Damage and Fracture of Engineering Materials organizers Abstr ct Mechanical fatigue is an important p enomen n when the structure are exposed to dyna c, fluctuating loadings. Espe ially aerospace structures re commonly xposed to random vibration oadings. In this paper, random vibration fatigue is studied both nume ically and experimentally. For this purpos , a rectangular cross-section notched beam i design d in order t con uct the vibration f gue analysis in the frequency dom in by the Dirlik ’s damage model. Aluminum and steel notched beams are prepared in order to carry out the vibration fatigue tests to compare with the fatigue analysis results. The effect of modal damping on the vibration fatigue analysis resu ts is particularly studied. © 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 1st International Workshop on Plasticity, Damage and Fracture of Engineering Materials organizers 1st International Workshop on Plasticity, Damage and Fracture of Engineering Materials Implementation of Dirlik’s damage model for the vibration fatigue analysis Gürzap İ. Demirel a, *, Altan Kayran b a Defense Industries Research and Development Institute, Scientific and Technological Research Council of Turkey, Ankara 06261, Turkey b Deparment of Aerospace Engineering, Middle East Technical University, Ankara 06800, Turkey Abstract Mechanical fatigue is an important phenomenon when the structures are exposed to dynamic, fluctuating loadings. Especially aerospace structures are commonly exposed to random vibration loadings. In this paper, random vibration fatigue is studied both numerically and experimentally. For this purpose, a rectangular cross-section notched beam is designed in order to conduct the vibration fatigue analysis in the frequency domain by the Dirlik ’s damage model. Aluminum and steel notched beams are prepared in order to carry out the vibration fatigue tests to compare with the fatigue analysis results. The effect of modal damping on the vibration fatigue analysis results is particularly studied. 1st International Workshop on Plasticity, Damage and Fracture of Engineering Materials Implementation of Dirlik’s d m ge model for the vibration fatigue analysis Gürzap İ. Demirel a, *, Altan Kayran b a Defense Industries Research and Development Institute, Scientific and Technological Research Council of Turkey, Ankara 06261, Turkey b Deparment of Aerospace Engineering, Middle East Technical University, Ankara 06800, Turkey Keywords: Random vibration fatigue; Dirlik’s damage model, Vibration fatigue test, Damping ratio 1. Introduction The main focus of present paper is to implement Dirlik’s damage model for the vibration fatigue analysis and to perform a comparative study with the experimental vibration fatigue tests. In general, mechanical fatigue analyses 1. Introduction The main focus of present paper is to implement Dirlik’s damage model for the vibration fatigue analysis and to perform a comparative study with the experimental vibration fatigue tests. In general, mechanical fatigue analyses Keywords: Random vibration fatigue; Dirlik’s damage model, Vibration fatigue test, Damping ratio

* Corresponding author. E-mail address: gurzap.demirel@tubitak.gov.tr * Corresponding author. E mail address: gurzap.demirel@tubitak.gov.tr

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 1st International Workshop on Plasticity, Damage and Fracture of Engineering Materials organizers 2452 3216 © 2019 Th 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 1st International Workshop on Plasticity, Damage and Fracture of Engineering Materials 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 1st International Workshop on Plasticity, Damage and Fracture of Engineering Materials organizers 10.1016/j.prostr.2019.12.091