PSI - Issue 2_A

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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 Analysis and automated fatigue damage evaluation of a 17Mn1Si pipeline steel P.O. Maruschak 1* , I.V. Konovalenko 1 , T. Vuherer 2 , S.V. Panin 3,4 , F. Berto 4,5 , I.M. Danyliuk 1 , A. Menou 6 1 Ternopil Ivan Pul’uj National Technical University, Ternopil, Ruska 56 str., 46001, Ukraine E-mail: Maruschak.tu.edu@gmail.com 2 University of Maribor, Faculty of Mechanical Engineering, Smetanova 17, 2000 Maribor, Slovenia 3 Institute of Strength Physics and Materials Science SB RAS, Tomsk 634021, Russia 4 National Research Tomsk Polytechnic University, 30 Lenin Ave, Tomsk 634050, Russia 5 University of Padova, Stradella S.Nicola 3, 36100 Vicenza, Italy 6 International Academy of Civil Aviation, Casablanca, Morocco Abstract Digital identification and evaluation of the fatigue damage accumulation kinetics on the surface of the fatigue sensor from steel 17Mn1Si is performed using the digital image processing metho . The accumulation of defects was assessed based on the analysis of the diagnostic results for individual stages of cyclic deformation. It is established that the graded nature of the fatigue crack growth is in a good agreement with the parameters of the image of the analyzed surface. Based on the gr dual processing of the results obtained for the surface damag the main regularities in the development of shear and rotational processes are found. The theoretical preconditions and experimental results are presented. © 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 nalysis and auto ated fatigue da age evaluation of a 17 n1Si pipeline steel P.O. Maruschak 1* , I.V. Konovalenko 1 , T. Vuherer 2 , S.V. Panin 3,4 , F. Berto 4,5 , I.M. Danyliuk 1 , A. M nou 6 1 Ternopil Ivan Pul’uj National Technical University, Ternopil, Ruska 56 str., 46001, Ukraine E-mail: Ma uschak.tu.edu@gmail.com 2 University of Maribor, Faculty of Mechanical Engineering, Smetanova 17, 2000 Maribor, Slovenia 3 Institute of Strength Physics and Mat als S ience SB RAS, Tomsk 634021 Russia 4 National Research Tomsk Polytechnic Unive sity, 30 Lenin Ave, Tomsk 634050, Russia 5 University of Padova, Strad lla S.Ni ola 3, 36100 Vicenza, Italy 6 International Academy of Civil Aviation, Casablanca, Morocco Abstract Digital identification and evaluation of the fatigue damage acc mulation kinetics on the surface of the fatigue sensor from steel 17Mn1Si is performed using the digital image processing method. The accumulation of defects was assessed based on the analysis of the diagnostic results for individual stages of cyclic deformation. It is established that the graded nature of the fatigue crack growth is in a good agreement with the parameters of the image of the analyzed surface. Based on the gradual processing of the results obtained for the surface damage the main regularities in the development of shear and rotational processes are found. The theoretical preconditions and experimental results are presented. © 2016 The Authors. Published by Elsevier B.V. Peer-review under responsibility of the Scientific Committee of ECF21. Copyright © 2016 The Author . 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. Keywo ds: fatigue, fracture, in- ervice properties, damage, plastic deformation, stress; Keywords: fatigue, fracture, in-service properties, damage, plastic deformation, stress;

Keywords: High Pressure Turbine Blade; Creep; Finite Element Method; 3D Model; Simulation.

1. Introduction 1. Introduction

The need in ensuring the reliable diagnostics of the technical condition and predicting the residual life of the high tech equipment is preconditioned by the use of fatigue sensors and development of new algorithms for the analysis of the condition of the surface with fatigue damage Zhou et al. (2002) and Kuang et al. (2008). One of the problems The need in ensuring the reliable diagnostics of the technical condition and predicting the residual life of the high tech equipment is preconditioned by the use of fatigue sensors and development of new algorithms for the analysis of the condition of the surface with fatigue damage Zhou et al. (2002) and Kuang et al. (2008). One of the problems

* 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. 2452-3216 © 2016 The Authors. Published by Elsevier B.V. Peer-review under responsibility of the Scientific Committee of ECF21.

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.2016.06.242