PSI - Issue 22

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

www.elsevier.com/locate/procedia

www.elsevier.com/locate/procedia

ScienceDirect

Procedia Structural Integrity 22 (2019) 78–83

© 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 First International Symposium on Risk and Safety of Complex Structures and Components 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 First International Symposium on Risk and Safety of Complex Structures and Components organizers Abstract Based on critical plane approach, this paper develops a new damage parameter through combing the equivalent strain energy aspect for multiaxial fatigue analysis, which includes no additional parameters and overcomes the deficiency of using only equivalent stress/strain criterion separately under multiaxial loadings. Then, experimental data of GH4169, TC4, Al 7050-T7451 alloys under different loading conditions are applied for model validation and comparison with the other four models. Results indicate that the proposed damage parameter yields better multiaxial fatigue life predictions than others. Keywords: critical plane, mu tiaxial fatigue, equivalent strain energy, life prediction, non-proportional hardening © 2019 The Authors. Published by Elsevier B.V.This i an o en access article u de the CC BY-NC ND license (http://creativecomm .org/licenses/by- c- d/4.0/) Peer-review under responsibility of the First International Symposium on Risk and Safety of Complex Structures and Components organizers First International Symposium on Risk and Safety of Complex Structures and Components Multiaxial fatigue life evaluation using strain energy-based critical plane approach Meng-Fei Hao a , Shun-Peng Zhu a, b, *, Fu-Long Xia a a School of Mechanical and Electrical Engineering, University of Electronic Science and Technology of China, Chengdu 611731, China b Center for System Reliability & Safety, University of Electronic Science and Technology of China, Chengdu 611731, China; Abstract Based on critical plane approach, this paper develops a new damage parameter through combing the equivalent strain energy aspect for multiaxial fatigue analysis, which includes no additional parameters and overcomes the deficiency of using only equivalent stress/strain criterion separately under multiaxial loadings. Then, experimental data of GH4169, TC4, Al 7050-T7451 alloys under different loading conditions are applied for model validation and comparison with the other four models. Results indicate that the proposed damage parameter yields better multiaxial fatigue life predictions than others. Keywords: critical plane, multiaxial fatigue, equivalent strain energy, life prediction, non-proportional hardening First International Symposium on Risk and Safety of Complex Structures and Components Multiaxial fatigue life evaluation using strain energy-based critical plane approach Meng-Fei Hao a , Shun-Peng Zhu a, b, *, Fu-L ng Xia a a School of Mechanical and Electrical Engineering, University of Electronic Science and Technology of China, Chengdu 611731, China b Center for System Reliability & Safety, University of Electronic Science and Technology of China, Chengdu 611731, China; Keywords: critical plane, multiaxial fatigue, equivalent strain energy, life prediction, non-proportional hardening 1 . Introduction With the development of aircraft engines, hot section components are often subjected to complex multiaxial loadings, which often result into fatigue failure [1-5]. In general, the multiaxial fatigue life can be predicted by von Keywords: critical plane, multiaxial fatigue, equivalent strain energy, life prediction, non-proportional hardening 1 . Introduction With the development of aircraft engines, hot section components are often subjected to complex multiaxial loadings, which often result into fatigue failure [1-5]. In general, the multiaxial fatigue life can be predicted by von

* Corresponding author. Tel.: (00-86) 183-8413-6885. E-mail address: zspeng2007@uestc.edu.cn

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 statement: Peer-review under responsibility of the First International Symposium on Risk and Safety of Complex Structures and Components 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 statement: Peer-review under responsibility of the First International Symposium on Risk and Safety of Complex Structures and Components organizers * Corresponding author. Tel.: (00-86) 183-8413-6885. E-mail address: zspeng2007@uestc.edu.cn

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 First International Symposium on Risk and Safety of Complex Structures and Components organizers 10.1016/j.prostr.2020.01.011