PSI - Issue 7

ScienceDirect Available online at www.sciencedirect.com Av ilable o line at ww.sciencedire t.com Sci ceDirect Structural Integrity Procedia 00 (2016) 000 – 000 Procedia Structu al Integrity 7 (2017) 468–475 ScienceDirect Structural Integrity Procedia 00 (2017) 000–000 Available online at www.sciencedirect.com ScienceDirect Structural Integrity Procedia 00 (2017) 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. Copyright © 2017 The Authors. Published by Elsevier B.V. Peer-review und r responsibility of the Scientific Co mittee of the 3rd International Symposium on Fatigue Design and Material Defects. 3rd International Symposium on Fatigue Design and Material Defects, FDMD 2017, 19-22 September 2017, Lecco, Italy Rolling Contact Fatigue Damage from Artificial Defects and Sulphide Inclusions in High Strength Steel Taizo Makino a *, Yutaka Neishi a , Daiki Shiozawa b , Shoichi Kikuchi b , Hitoshi Saito b , Kentaro Kajiwara c and Yoshikazu Nakai b a Nippon Steel & Sumitomo Metal Corporation, 1-8 Fuso-Cho, Amagasaki, Hyogo, 660-0891, Japan b Department of Mechanical Engineering, Kobe University, 1-1, Rokkodai, Nada, Kobe 657-8501, Japan c Japan Synchrotron Radiation Research Institute (JASRI), 1-1-1, Kouto, Sayo-cho, Sayo-gun, Hyogo 679-5198, Japan Abstract To clarify the effects of artificial defects and sulphide inclusions on rolling contact fatigue (RCF) in high strength steel, crack initiation and propagation behaviours from defects were evaluated by using synchrotron radiation computed laminography. Artificial defects and sulphide inclusions lead to RCF damage “flaking” through the same damage process, but considerably different crack initiation lives. Finite element analyses (FEA) for RCF simulated the different stress states between two kinds of defect. The FEA results suggest the reason for the different crack initiation lives in the RCF test. © 2017 The Authors. Published by Elsevier B.V. Peer-review under responsibility of the Scientific Committee of the 3rd International Symposium on Fatigue Design and Material Defects. Keywords: Rolling Contact Fatigue(RCF); Artificial Defect; Sulphide Inclusion; High Strength Steel; Synchrotron Radiation Computed Laminography (SRCL), Finite Element Analysis (FEA) 3rd International Symposium on Fatigue Design and Material Defects, FDMD 2017, 19-22 September 2017, Lecco, Italy Rolling ntact Fatigue Damage from Artificial Defects and Sulphide Inclusions in High Strength Steel Taizo Makino a *, Yutaka Neishi a , Daiki Shiozawa b , Shoichi Kikuchi b , Hitoshi Saito b , Kentaro Kajiwara c and Yoshikazu Nakai b a Nippon Steel & Sumitomo Metal Corporation, 1-8 Fuso-Cho, Amagasaki, H go, 660-0891, Japan b Department of Mechanical Engineering, Kobe University, 1-1, Rokkodai, Nada, Kobe 657-8501, Japan c Japan Synchrotron Radiation Research Institute (JASRI), 1-1-1, Kouto, Sayo-cho, Sayo-gun, Hyogo 679-5198, Japan Abstract To clarify th effects of artificial defects and sulphide inclusions on rolling c ntact fatigue (RCF) in high trength steel, crack initiation and prop gation behaviours from defects were evaluated by using synchrotron radiation computed laminography. Artificial defects and ulphide inclusions lead to RCF dam ge “flaking” through the sam damage process, but considerably different crack initiation lives. Finite element analyses (FEA) for RCF simulated the different stress states between two kinds of defect. The FEA results suggest the reason for the different crack initiation lives in the RCF test. © 2017 The Authors. Published by Elsevier B.V. Peer-review under responsibility of the Scientific Committee of the 3rd International Symposium on Fatigue Design and Material D fects. Keywords: Rolling Contact Fatigue(RCF); Artificial Defect; Sulphide Inclusion; High Strength Steel; Synchrotron Radiation Computed Laminography (SRCL), Finite Element Analysis (FEA)

© 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.: +81-6-7670-5875; fax: +81-6-6489-5794. E-mail address: makino.hb3.taizo@jp.nssmc.com

2452-3216 © 2017 The Authors. Published by Elsevier B.V. Peer-review under responsibility of the Scientific Committee of the 3rd International Symposium on Fatigue Design and Material Defects. 2452-3216 © 2017 The Authors. Published by Elsevier B.V. Peer-review under responsibility of the Scientific Committee of the 3rd International Symposium on Fatigue Design and Material Defects. * Corresponding author. Tel.: +81-6-7670-5875; fax: +81-6-6489-5794. E-mail address: makino.hb3.taizo@jp.nssmc.com

* 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 PCF 2016.

2452-3216 Copyright  2017 The Authors. Published by Elsevier B.V. Peer-review under responsibility of the Scientific Committee of the 3rd International Symposium on Fatigue Design and Material Defects. 10.1016/j.prostr.2017.11.114