PSI - Issue 2_B

ScienceDirect Available online at www.sciencedirect.com Av ilable online at ww.sciencedire t.com cienceDirect Structural Integrity Procedia 00 (2016) 000 – 000 Procedia Struc ural Integrity 2 (2016) 1561–1568 Available online at www.sciencedirect.com ScienceDirect Structural Integrity Procedia 00 (2016) 000–000 Available online at www.sciencedirect.com ScienceDirect Structural Integrity Procedia 00 (2016) 000–000

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XV Portuguese Conference on Fracture, PCF 2016, 10-12 February 2016, Paço de Arcos, Portugal Thermo-mechanical modeling of a high pressure turbine blade of an airplane gas turbine engine P. Brandão a , V. Infante b , A.M. Deus c * a Department of Mechanical Engineering, Instituto Superior Técnico, Universidade de Lisboa, Av. Rovisco Pais, 1, 1049-001 Lisboa, Portugal b IDMEC, Department of Mechanical Engineering, Instituto Superior Técnico, Universidade de Lisboa, Av. Rovisco Pais, 1, 1049-001 Lisboa, Portugal c CeFEMA, Department of Mechanical Engineering, Instituto Superior Técnico, Universidade de Lisboa, Av. Rovisco Pais, 1, 1049-001 Lisboa, Portugal Abstract During their operation, modern aircraft engine components are subjected to increasingly demanding operating conditions, especially the high pressure turbine (HPT) blades. Such conditions cause these parts to undergo different types of time-dependent degradation, one of which is creep. A model using the finite element method (FEM) was developed, in order to be able to predict the creep behaviour of HPT blades. Flight data records (FDR) for a specific aircraft, provided by a commercial aviation company, were used to obtain thermal and mechanical data for three different flight cycles. In order to create the 3D model needed for the FEM analysis, a HPT blade scrap was scanned, and its chemical composition and material properties were obtained. The data that was gathered was fed into the FEM model and different simulations were run, first with a simplified 3D rectangular block shape, in order to better establish the model, and then with the real 3D mesh obtained from the blade scrap. The overall expected behaviour in terms of displacement was observed, in particular at the trailing edge of the blade. Therefore such a model can be useful in the goal of predicting turbine blade life, given a set of FDR data. 21st European Conference on Fracture, ECF21, 20-24 June 2016, Catania, Italy WES 2808 for Brittle Fracture Assessment of Steel Components under Seismic Conditions – Part I: Fracture Assessment Procedure Minami, F. a *, Ohata, M. b , Takashima, Y. a , Shima uki, H. c , Shimada, Y. c , Suzuki, T. c , Igi, S. d , Ishii, T. d , Kinefuchi, M. e , Yamaguchi, T. e , Nakagomi, T. f , Hagihara, Y. g a Joining and Welding Reseach Institute, Osaka University, 11-1, Mihogaoka, Ibaraki, Osaka 567-0047, Japan b Materials and Manufacturing Science, Osaka University, 2-1, Yamadaoka, Suita, Osaka 565-0871, Japan c Nippon Steel & Sumitomo Metal Corporation, 1-8, Fuso-cho, Amagasaki, Hyogo 660-0891, Japan d JFE Steel Corporation, 1, Kawasaki-cho, Chuo-ku,Chiba 260-0835, J pan e Kobe Steel, 1-5-5, Takatsukadai,Nishi-ku,Kobe 651-2271, Japan f Shinshu University, 4-17-1, Wakasato-cho, Nagano, Nagano 380-0928, Japan g Sophia University, 7-1, Kioi-cho, Chiyoda-ku, Tokyo 102-0094, Japan Abstract Th Welding Engineering Standard, WES 2808, has been developed in the Ja n Welding Eng neeri g Society (JWES) for assessing the brittle fracture in st l components u der se smic conditions. WES 2808 includes two un que ideas: 1) a r ference temp rature concept for the evaluation of the materi l fracture toughness under yclic and dynamic loading, nd 2) an equivalent CTOD concept for the c rrec io of CTOD toughness for constrain loss in struc ural components. The CTOD design curve is employ d f r t e assessment of the crack driving force of components. The revision of WES 2808 is in progress in JWES to expand the range of use and to improve the fracture assessment procedure. This paper describes the key contents of WES 2808. © 2016 The Authors. Published by Elsevier B.V. Peer-review under responsibility of the Scientific Committee of ECF21. Keywords: brittle fracture assessment; steel components; pre-strain; dynamic loading; local strain; constraint loss; Weibull stress; ISO 27306 1. Introduction The Kobe great earthquake, happened in 1995, caused a considerable damage to steel frame structures. Beam-to column connections failed in a brittle manner as reported by Toyoda (1995). During the earthquake, structures 21st European Conference on Fracture, ECF21, 20-24 June 2016, Catania, Italy WES 2808 for Brittle Fracture Assessment of Steel Components under Seismic Conditions – Part I: Fracture Assessment Procedure Minami, F. a *, Ohata, M. b , Takashima, Y. a , Shimanuki, H. c , Shimada, Y. c , Suzuki, T. c , Igi, S. d , Ishii, T. d Kinefuchi, M. e , Yamag chi, T. e , Nakagomi, T. f , Hagihara, Y. g a Joining and Welding Reseach Institute, Osaka University, 11-1, Mihogaoka, Ibaraki, Osaka 567-0047, Japan b Materials and Manufacturing Scie ce, Osaka University, 2-1, Yamadaoka, Suita, Osaka 565-0871, Japan c Nippon Steel & Sumitomo Metal Corporation, 1-8, Fuso-cho, Amagasaki, Hyogo 660-0891, Japan d JFE Steel Corporation, 1, Kawasaki-cho, Chuo-ku,Chiba 260-0835, Japan e Kobe Steel, 1-5-5, Takatsukadai,Nishi-ku,Kobe 651-2271, Japan f Shinshu University, 4-17-1, Wakasato-cho, Nagano, Nagano 380-0928, Japan g Sophia University, 7-1, Kioi-cho, Chiyoda-ku, Tokyo 102-0094, Japan Abstract The Welding Engineering Standard, WES 2808, has been developed in the Japan Welding Engineering Society (JWES) for assessing the brittle fracture in steel components under seismic conditions. WES 2808 includes two unique ideas: 1) a reference temperature concept for the evaluation of the material fracture toughness under cyclic and dynamic loading, and 2) an equivalent CTOD concept for the correction of CTOD toughness for constraint loss in structural components. The CTOD design curve is employed for the assessment of the crack driving force of components. The revision of WES 2808 is in progress in JWES to expand the range of use and to improve the fracture assessment procedure. This paper describes the key contents of WES 2808. © 2016 The Authors. Published by Elsevier B.V. Peer-review under responsibility of the Sci ntific Committee of ECF21. Keywords: brittle fracture assessment; steel components; pre-strain; dynamic loading; local strain; constraint loss; Weibull stress; ISO 27306 1. Introduction The Kobe reat ea thquake, happen d in 1995, caused a considerable damage to steel frame structures. Beam-to column connections failed in a brittle manner as reported by Toyoda (1995). During the earthquake, structures Copyright © 2016 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/). P er-review under responsibil ty of the Scientific Committee of ECF21. © 2016 The Authors. Published by Elsevier B.V. Peer-review under responsibility of the Scientific Committee of PCF 2016. Keywords: High Pressure Turbine Blade; Creep; Finite Element Method; 3D Model; Simulation.

* Corresponding author. Tel.: +351 218419991. E-mail address: amd@tecnico.ulisboa.pt 2452-3216 © 2016 The Authors. Published by Elsevier B.V. Peer-review under responsibility of the Scientific Committee of ECF21. * Corresponding author. Tel.: +81-6-6879-4373; Fax: +81-6-6879-4373. E-mail address: minami@jwri.osaka-u.ac.jp 2452-3216 © 2016 The Authors. Published by Elsevier B.V. Peer-review under responsibility of the Scientific Committee of ECF21. * Corresponding author. Tel.: +81-6-6879-4373; Fax: +81-6-6879-4373. E-mail address: minami@jwri.osaka-u.ac.jp

2452-3216 © 2016 The Authors. Published by Elsevier B.V. Peer-review under responsibility of the Scientific Committee of PCF 2016. Copyright © 2016 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 Scientific Committee of ECF21. 10.1016/j.prostr.2016.06.198