PSI - Issue 13

ScienceDirect Available online at www.sciencedirect.com Available o line at www.sciencedire t.com Sci ceDirect Structural Integrity Procedia 00 (2016) 000 – 000 Procedia Structu al Integrity 13 (2018) 238–242 Available online at www.sciencedirect.com ScienceDirect StructuralIntegrity Procedia 00 (2018) 000–000 Available online at www.sciencedirect.com ScienceDirect StructuralI tegrity Procedia 00 (2018) 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. © 2018 The Authors. Published by Elsevier B.V. Peer-review u der r sponsibility of th ECF22 rganizers. ECF22 - Loading and Environmental effects on Structural Integrity An experimental method for high temperature non-contacting measurements of deformed specimen Teraud W. a,b, * a Lomonosov Moscow State University, Michurinskiy av. 1, Moscow, 119192, Russia b V.A. Trapeznikov Institute of Control Sciences, Profsouznaya av. 65, Russian Academy of Sciences, Moscow, Russia Abstract The aim of paper is a non-touch experimental method for measure parameters of the specimen in a moment of high temperature deformation. The method is consist of a photo camera, a lamp into a furnace, an electr ni system send a pulse to take a picture in each 0.1 mm stretching and a computer program for post processing. The specimen geometry was measured remotely, with pictures taken during the experiment. In a tension test the use of a developed non-contacting measuring system allowed us to see variations in the specimen shape and to estimate the true stress in various cross-sections on the time. In post processing stage we can fix localization time by a theoretical criterion automatically. © 2018 The Authors. Publishedfd by Elsevier B.V. Peer-review under responsibility of the ECF22 organizers. Keywords: measurement; noncontacting; high temperature; experiment; creep 1. Introduction At all times field tests have been the best methods to verify developed theories and sources of new results. During tests at high temperatures difficulties emerge when one measures parameters of a deformed specimen. For this reason during these tests only one or two parameters can be measured. ECF22 - Loading and Environmental effects on Structural Integrity An experimental method for high temperature non-contacting measurements of deformed specimen Teraud W. a,b, * a Lomonosov Moscow State University, Michurinskiy av. 1, Moscow, 119192, Russia b V.A. Trapeznikov Institute of C ntrol ciences, P ofsouznaya av. 65, Russian A ademy of Sciences, Moscow, Russia Abstract The aim of paper is a non-touch exp rimental method for measure pa amet rs of the specimen in a moment of high temperature deformation. The method is consist of a phot camera, lamp into a furnace, an electronic system send a pulse to take a picture in each 0.1 mm stretching and a computer program for post pr cessing. The specime geom try was measured remotely, with pictures taken during t e experiment. In a tension test the use of a develop d non-contacting measuring system allowed us to see variations in the specimen shape and to estimate the true stress in various cross-sections on the time. In post processing stag we c n fix localization time by a theoretical crit rion automatically. © 2018 The Authors. Publishedfd by Elsevier B.V. Peer-review under responsibility of the ECF22 organizers. Keywords: measurement; noncontacting; high temperature; experiment; creep 1. Introduction At all times field tests have been the best methods to verify developed theories and sources of new results. During tests at high temperatures difficulties emerge when one measures parameters of a deformed specimen. For this reason during these tests only one or two parameters can be measured. © 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© 2018 The Authors. Published by Elsevier B.V. Peer-review under responsibility of the ECF22 organizers. 2452-3216© 2018 The Authors. Published by Elsevier B.V. Peer review under responsibility of the ECF22 organizers. * Corresponding author. Tel.: +7-495-939-5278; fax:+7-495-939-5308 E-mail address: ldrnww@gmail.com * Corresponding author. Tel.: +7-495-939-5278; fax:+7-495-939-5308 E-mail ad ress: ldrnww@gmail.com

2452-3216 © 2016 The Authors. Published by Elsevier B.V. Peer-review under responsibility of the Scientific Committee of PCF 2016.

2452-3216  2018 The Authors. Published by Elsevier B.V. Peer-review under responsibility of the ECF22 organizers. 10.1016/j.prostr.2018.12.040