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) 31–37

© 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 Abstract In this study, v idities of different crack growth retarda io mode s exis ing i the literature are evaluated by performing fatigu r ck growth experiments. Comp t tension specimen ade f om rolled Al-7075 plates with L-T crack orientation are used. In the expe imental analyses, by k eping the minimum alternating load at a constan valu , he magnitudes of the ov rloads ar changed syste atically a d the crack growth be vior is monitor d for each test. For the same conditions, crack growth prediction with reta dation effe ts are made by employing the existing tardation models in the literature and they are compar d with the experimental measurem nts. The results show that the higher the magnitude of the overload, the higher the retardation effect. It is also observed that except two models, all retardation models predict the retarded crack growth behavior with a reasonable closeness to experim ntal measurements. © 2019 The Autho s. Publ shed 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 Evaluation of Different Crack Growth Retardation Models Under Single Overloads Using Al-7075 Material Mehmet F. Yaren a , Ali O. Ayhan a, *, Sedat Iriç a a Department of Mechanical Engineering, Sakarya University, Sakarya 54050, Turkey Abstract In this study, validities of different crack growth retardation models existing in the literature are evaluated by performing fatigue crack growth experiments. Compact tension specimens made from rolled Al-7075 plates with L-T crack orientation are used. In the experimental analyses, by keeping the minimum alternating load at a constant value, the magnitudes of the overloads are changed systematically and the crack growth behavior is monitored for each test. For the same conditions, crack growth predictions with retardation effects are made by employing the existing retardation models in the literature and they are compared with the experimental measurements. The results show that the higher the magnitude of the overload, the higher the retardation effect. It is also observed that except two models, all retardation models predict the retarded crack growth behavior with a reasonable closeness to experimental measurements. 1st International Workshop on Plasticity, Damage and Fracture of Engineering Materials Evaluation of Different Crack Growth Retardation Models Under Single Overloads Using Al-7075 Material Mehmet F. Yaren a , Ali O. Ayhan a, *, Sedat Iriç a a Department of Mechanical Engineering, Sakarya University, Sakarya 54050, Turkey Keywords: Crack growth, Overload, Retardation

Keywords: Crack growth, Overload, Retardation

* Corresponding author. E-mail address: ayhan@sakarya.edu.tr (A.O. Ayhan) * Corresponding author. E mail address: ayhan@sakarya.edu.tr (A.O. Ayhan)

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.2019.12.083