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) 3393–3398 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 Interrelation betwe n local strain jumps and temperature bursts due to the jerky flow in metals under the complicate loading conditions: experimental study by using the DIC-technique and the IR-analysis Tretyakova T.V. a *, Wildemann V.E. a a Center of Experimental Mechanics, Perm National Research Polytechnic University, 29 Komsomolsky prospekt, Perm 614990, Russia The present work focused on the complex study of the influence of the stress concentrators, the loading system stiffness, and the additional cyclic impact on the behavior patterns of the Al-Mg alloy and the carbon steel during uniaxial tension tests with the use of the original samples with complicated geometry. The aim of the investigation was the complex study of the temporal instabilities and spatial localization due to the Lüder’s behavior, the Portevin– Le Chatelier effect and the shoulder or necking effect with the use of the non-contact 3-D Digital Image Correlation measurement system Vic-3D (Correlated S lutions) and the infrared system FLIR SC7700. This study contains a brief description of the t st procedure an the experimental results of providing mechanical tests on the flat dog-bone specimens and the specimens with stress concentrators, with the additional deformable parts and the complic ted samples with two L-shaped holes. © 2016 The Authors. Published by Elsevier B.V. Peer-revi w under responsibility of the Scientific C mmittee of ECF21. Keywo ds: digital imag correlatio , IR-analysis, jerky flow, strain band, the Portiven-Le Chatelier effect, str ss concentrator 21st European Conference on Fracture, ECF21, 20-24 June 2016, Catania, Italy Interrelation between local strain jumps and temperature bursts due to the jerky flow in metals under the complicate loading conditions: exp imental study by using the DIC-technique and the IR-analysis Tretyakova T.V. a *, Wildemann V.E. a a Center of Experimental Mechanics, Perm National Research Polytechnic University, 29 Komsomolsky prospekt, Perm 614990, Russia Abstract The present work focused on the complex study of the influence of the stress concentrators, the loading system stiffness, and the additional cyclic impact on the behavior pat erns Al-Mg all y and h carbon steel during uni xial tension tests with the us of the riginal samples with complicated geometry. T aim of the investigation was th complex study of the temporal instabilities and spat al localization due t the Lüder’s behavior, the Portevin– Le Chatelier effect and the sho l er or necking effect with the use of the non-contact 3-D Digital Image Correlation measur ment system Vic-3D (Correlat d Solutions) and the in rared system FLIR SC7700. T is s udy contains a bri f description of the test proced r and the experimental result of provid g echanical tests on the flat dog-bone specim ns and th spec mens with ress conc ntrators, with the additional de o mable p rts and the compli at d s mples with two L-sh p d hol s. © 2016 The Author . Published by Elsevier B V. Peer-review und r espons bility of the Scientific Committee of ECF21. Keywords: digital image correlation, IR-analysis, jerky flow, strain band, the Portiven-Le Chat lier effect, stress co cent ator 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. Abstract

1. Introduction

© 2016 The Authors. Published by Elsevier B.V. Peer-review under responsibility of the Scientific Committee of PCF 2016. 1. Introduction

Keywords: High Pressure Turbine Blade; Creep; Finite Element Method; 3D Model; Simulation. One of the topical field in mechanics of deformable solids is the experimental study and theoretical description of the inelastic deformation, processes of damage accumulation, softening and formation of the facture conditions. The spatial inhomogeneity of the plastic flow we can observe at various scales and structure levels. At the stage of the yield One of the topical field in mechanics of deformable solids is the experimental study and theoretical description of the in lastic deformation, processes of damage accumulation, oft ning and forma ion of the facture conditions. The spatial inhomogeneity f the pla tic flow we can observe t various scales and st ucture levels. At the stage of the yield

* Corresponding author. Tel.: +7-912-499-5960. E-mail address: cem.tretyakova@gmail.com * Corresponding author. Tel.: +7-912-499-5960. E-mail ad ress: cem.tretyakova@gmail.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 und r responsibil ty of the Scientific Committee of ECF21. 2452-3216 © 2016 The Authors. Published by Elsevier B.V. Peer review under r sponsibility 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.2016.06.423