PSI - Issue 22

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 22 (2019) 70–77

© 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 Abst act For ensuring stru tural integri y and reliability of ng neering components, it is vital to accurat ly m del notch an size effects on fatigue behavi r of materials. Based on the highly stressed volume approach, this pape propo es a methodology cons dering bot effect of n tch and size to predict the fatigu life istribu ion of specimens with different geome ries. In detail, under We b ll distribut on, a dynamic mod l coefficient vary with diffe nt maximum local stresses is propo ed by quantifying the highly s ressed v lumes of diff rent sizes. Exp rimental data of two alloys a e pplied for model valida ion and comparison. Fatigue life distributions of two materials with different geometries are predicted respectively, and estimated P-S-N curves indicate t at prop sed model predictions agree well w th the robabili tic s atter band of experimental results. © 2019 The Autho s. Publ shed by Elsev er B.V.This is an open access article u er th CC BY-NC-ND li ense (http://cr a ivecommons.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 organiz rs First International Symposium on Risk and Safety of Complex Structures and Components Probabilistic modelling of notch and size effect of components under fatigue loadings Yang Ai a , Shun-Peng Zhu a, b, c, *, Ding Liao a a School of Mechanical and Electrical Engineering, University of Electronic Science and Technology of China, Chengdu 611731, China b Key Laboratory of Aero-engine Thermal Environment and Structure, Ministry of Industry and Information Technology, Nanjing University of Aeronautics and Astronautics, Nanjing 210016, China c Center for System Reliability & Safety, University of Electronic Science and Technology of China, Chengdu 611731, China Abstract For ensuring structural integrity and reliability of engineering components, it is vital to accurately model notch and size effects on fatigue behavior of materials. Based on the highly stressed volume approach, this paper proposes a methodology considering both effects of notch and size to predict the fatigue life distribution of specimens with different geometries. In detail, under Weibull distribution, a dynamic model coefficient vary with different maximum local stresses is proposed by quantifying the highly stressed volumes of different sizes. Experimental data of two alloys are applied for model validation and comparison. Fatigue life distributions of two materials with different geometries are predicted respectively, and estimated P-S-N curves indicate that proposed model predictions agree well with the probabilistic scatter band of experimental results. First International Symposium on Risk and Safety of Complex Structures and Components Probabilistic modelling of notch and size effect of components under fatigue loadings Yang Ai a , Shun-Peng Zhu a, b, c, *, Ding Liao a a School of Mechanical and Electrical Engineering, University of Electronic Science and Technology of China, Chengdu 611731, China b Key Laboratory of Aero-engine Thermal Environment and Structure, Ministry of Industry and Information Technology, Nanjing University of Aeronautics and Astronautics, Nanjing 210016, China c Center for System Reliability & Safety, University of Electronic Science and Technology of China, Chengdu 611731, China Keywords: Notch, size effect, Weibull distribution, highly stressed volume, fatigue;

Keywords: Notch, size effect, Weibull distribution, highly stressed volume, fatigue;

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

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.2020.01.010