PSI - Issue 2_B

ScienceDirect Available online at www.sciencedirect.com Av ilable o line at ww.sciencedire t.com cienceDirect Structural Integrity Procedia 00 (2016) 000 – 000 Procedia Struc ural Integrity 2 (2016) 1585–1592 Available online at www.sciencedirect.com Sci nceDirect 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 VI: Application of WES 2808 to Beam-to-column Connections Takashima, Y a *, Ohata, M b , Ishii, T c , Hagihara, Y d , Minami, F a a Joining and Welding Research Institute, Osaka University, 11-1, Mihogaoka, Ibaraki, Osaka 567-0047, Japan b Materials a d Manufactu eing Science, Osaka University, 2-1, Yama aoka, Suita, Osaka 565-0871, Japan c JFE Steel Corporation, 1-1, Minamiwatarida-cho, Kawasaki-Ku, Kawasaki 210-0855, Japan d Sophia University, 7-1, Kioi-cho, Chiyoda-ku, Tokyo 102-0094, Japan Abstract This paper describes application of revised fracture assessment method specified in WES 2808 to full-scale models of beam-to column connections subjected to cyclic and dynamic loading. Fracture tests of full-scale models of beam-to-column connections were carried out (Morita, 1999, and Yoshimura, 2006). Cyclic l ading tests were conducted, which included dyna ic loading tests. Brit le fracture occurred from weld defects (lack of fusion or wel crack or artificial efects in beam-to-c lumn conn ctions. In cc rdance with WES 2808, the fracture train at the beam end in the connection was evaluat d. Fracture toughness of a local area including fracture initiation s te was replaced by the static fracture toughness at refer nc emperature define by WES 2808. The equivalent C OD ratio β was employed to correct t constraint l s n structural components on th basis of the Weibull stress criterion. The fracture performance of full-scale models of be m-to-column connections evaluated by the procedure spe ified in WES 2808 was almost consistent with the experimental results. © 2016 The Authors. Published by Elsevier B.V. Peer-review under responsibility of the Scientific Committee of ECF21. 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 VI: Application of WES 2808 to Beam-to-column Connections Takashima, Y a *, Ohata, M b , Ishii, T c , Hagihara, Y d , Minami, F a a Joining and Welding Research Institute, Osaka University, 11-1, Mihogaoka, Ibaraki, Osaka 567-0047, Japan b Materials and Manufactureing Science, Osaka University, 2-1, Yamadaoka, Suita, Osaka 565-0871, Japan c JFE Steel Corporation, 1-1, Minamiwata ida-cho, Kawasaki-Ku, Kawasaki 210-0855, Jap n d Sophia University, 7-1, Kioi-cho, Chiyoda-ku, Tokyo 102-0094, Japan Abstract This paper describes application of revised fracture assessment method specified in WES 2808 to full-scale models of beam-to column conn ctions subje ted to cyclic an dynamic loading. Fracture tests o full-scale models f beam-to-column connections were carried out (Morita, 1999, and Yoshimura, 2006). Cyclic loading te ts were conducte , which included dy amic loading tests. Brittle fracture occurred from weld defects (lack of fusion or weld crack) or artificial defects in beam-to-column connections. In accordance with WES 2808, the fracture strain at the beam end in the connection was evalu ted. Fracture t ughness of a local area including fracture initiation site was repl ced by the static fra ture toughness at ref rence tempera defined by WES 2808. The equ valent CTOD ratio β was employed o correct the constraint loss in structural omponents on th bas s of the Weibull stress criterion. The fracture performance f full-scale mod ls f be m-t -column onnections evaluat d by the pr cedure specified in WES 2808 was lmost consistent with th experimental results. © 2016 The Authors. Published by Elsevier B.V. Peer-review und r espons bility of the Scientific Committee of ECF21. Keywords: seismic loading (cyclic loading, dynamic loading); constraint loss; beam-to-column connection; equivalent CTOD ratio; Weibull stress 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. © 2016 The Authors. Published by Elsevier B.V. Peer-review under responsibility of the Scientific Committee of PCF 2016. Keywords: seismic loading (cyclic loading, dynamic loading); constraint loss; beam-to-column connection; equivalent CTOD ratio; Weibull stress

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.: +81-6-6879-8658; fax: +81-6-6879-8658. E-mail address: takashima@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.: +81-6-6879-8658; fax: +81-6-6879-8658. E-mail address: takashima@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.2016.06.201