PSI - Issue 19

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Available online at www.sciencedirect.com Structural Integrity Procedia 27 (2019) 000 – 000 Structural Integrity Procedia 27 (2019) 000 – 000

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Procedia Structural Integrity 19 (2019) 64–72

Fatigue Design 2019 Discussion of fracture surface using beach marks on fatigue test data with large scale piping Masaru Bodai a , Yuichiro Nomura a , Daiki Takagoshi a , Seiji Asada b , Kentaro Hayashi c Fatigue Design 2019 Discussion of fracture surface using beach marks on fatigue test data with large scale piping Masaru Bodai a , Yuichiro Nomura a , Daiki Takagoshi a , Seiji Asada b , Kentaro Hayashi c

a Mitsubishi Heavy Industries, Ltd., 2 - 1 - 1 Shinhama Aria - cho, Takasago, Hyogo, 676 - 8686, Japan b Mitsubishi Heavy Industries, Ltd., 1 - 1 - 1 Wadamisaki - machi, Hyogo - ku, Kobe, Hyogo, 652 - 8585, Japan c The Kansai Electric Power Co., Inc., 5 - 3, 66 Kawasakayama Nyu, Mikata - gun Mihama - cho, Fukui, 919 - 1201, Japan a Mitsub shi Heavy Industries, Ltd., 2 - 1 - 1 Shinh ma Aria - cho, Takasago, Hyogo, 676 - 8686, Japan b Mitsubishi Heavy Industries, Ltd. 1 - 1 - 1 W d mis ki - machi, Hyogo k , Kobe, Hyog 652 - 8585, Japan c The Kansai Electric Power Co., Inc., 5 - 3, 66 Kawasakayama Nyu, Mikata - gun Mihama - cho, Fukui, 919 - 1201, Japan

Abstract Abstract

Design Fatigue Curve (DFC) Phase 1 subcommittee and Phase 2 subcommittee were established in the Atomic Energy Research Committee in the Japan Welding Engineering Society. DFC 1 and DFC 2 subcommittees were proposed new design fatigue curves for carbon steels & low alloy steels and austenitic stainless steels and a new design fatigue evaluation method. And a Japanese utility project performed large scale fatigue tests using austenitic stainless steel piping to obtain not only basic data but also fatigue data of mean stress effect. We reported that the results of the large-scale fatigue piping tests showed good agreement with the best-fit curve developed by the DFC 1 and DFC 2 subcommittees and the size effect could be considered as negligible. It was confirmed that the effect of mean stress can be accurately evaluated by the Smith-Watson-Topper approach. In this paper, crack growth analysis was carried out for the beach marks introduced during the large-scale fatigue piping tests using JSME S NA1 crack propagation equation of austenitic stainless steel and the analysis results were compared with the crack depths obtained from the beach marks. Design Fatigue Curve (DFC) Phase 1 subcommittee and Phase 2 subcommittee were established in the Atomic Energy Research Committee in the Japan Welding Engineering Society. DFC 1 and DFC 2 subcommittees were proposed new design fatigue curves for carbon steels & low alloy steels and a stenitic stainles steels and a new design fatigue evaluati method. And a Japanese tility project perform d large scale fatigue tests using austenitic stainless steel piping to obtain not only basic data but also fatigue dat of mean stress effect. We reported that the res lts of the large-scale fatigue piping tests sh we good agreement with the best-fit curve develop d by th DFC 1 and DFC 2 subcommittees and the size effect could be considered as negligible. It was confirmed that the effect of mean stress can be accurately evaluated by the Smith-Watson-Topper approach. In this paper, crack growth an lysis was carried out for the beach marks i troduced during the large-scale fatigue piping tests using JSME S NA1 crack propagation equation of austenitic stainless steel and the analysis results were compared with the crack depths obtained from the beach marks.

© 2019 The Authors. Published by Elsevier B.V. Peer-review under responsibility of the Fatigue Design 2019 Organizers. © 2019 The Authors. Published by Elsevier B.V. Peer-review under responsibility of the Fatigue Design 2019 Organizers. © 2019 The Authors. Published by Elsevier B.V. Peer-review under responsibility of the Fatigue Design 2019 Organizers. Keywords: Crack growth; Stainless steel; Design fatigue curve; Stress intensity factor Keywords: Crack growth; Stainless steel; Design fatigue curve; Stress intensity factor

2452-3216 © 2019 The Authors. Published by Elsevier B.V. Peer-review under responsibility of the Fatigue Design 2019 Organizers. 2452-3216 © 2019 The Authors. Published by Elsevier B.V. Peer-review under responsibility of the Fatigue Design 2019 Organizers.

2452-3216 © 2019 The Authors. Published by Elsevier B.V. Peer-review under responsibility of the Fatigue Design 2019 Organizers. 10.1016/j.prostr.2019.12.008