PSI - Issue 13

ScienceDirect Available online at www.sciencedirect.com Av ilable o line at ww.sciencedire t.com ienceDirect Structural Integrity Procedia 00 (2016) 000 – 000 Procedia Structural Integrity 13 (2018) 20 5–2 1 Available online at www.sciencedirect.com ScienceDirect Structural Integrity Procedia 00 (2018) 000–000 Available online at www.sciencedirect.com ScienceDirect Structural Integrity 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. ECF22 - Loading and Environmental effects on Structural Integrity Theoretical investigation of structural, mechanical, elastic and vibrational properties of advanced materials under extreme conditions D. Zagorac a,b, *, J. Zagorac a,b , M. Djukic c , D. Jordanov a , M. Rosic a,b , M. Cebela a,b , J. Lukovic a,b , V. Maksimovic a,b , B. Matović a,b a Institute of Nuclear Sciences Vinca, Materials Science Laboratory, University of Belgrade, Belgrade, Serbia b Center for synthesis, processing and characterization of materials for application in the extreme conditions, Belgrade, Serbia c University of Belgrade, Faculty of Mechanical Engineering, Belgr de, Serbia One of the recent trends in materials science and technology is the research of the behavior of the materials under the extreme conditions both on the theoretical and experimental basis. There are limitations of the experimental methods, however, theoretical approach can be used as a supplement to the experimental results. As a consequence, in the last two decades a vast number of structure prediction calculations have been performed on chemical systems, focusing on the high-pressure and high temperature phases. In this work, we would like to present several computational studies and their connection to the actual synthesis routes: lead sulfide (PbS), barium sulfide (BaS), and aluminum nitride (AlN). The investigated compoun s were calculated on ab initio level using the most advanced tools in quantum chemistry and computational material scienc includi g Ha tree-Fock Theory, Density Functional The ry (DFT) and Hybrid (B3LYP) Approximation. Th ir structu l, mechanical, el stic and v brational properties have been investigated and in addition, we show structu e candi at s as the fun tion of size, pressure nd emperature and not previously observed in any of the investigated materials thus creating new possibilities for synthesis of advanced materials with improved physical, chemic l, and/or mechanical properties. © 2018 The Authors. Published by Elsevier B.V. Peer-review under responsibility of the ECF22 organizers. ECF22 - Loading and Environmental effects on Structural Integrity Theoretical investigation of structural, mechanical, elastic and vibrational properties of advanced materials under extreme conditions D. Zagorac a,b, *, J. Zagor c a,b , M. Djukic c , D. Jordanov a , M. Rosic a,b , M. Cebela a,b , J. Lukovic a,b , V. Maksimovic a,b , B. Matović a,b a In titute of Nuclear Sciences Vinca, Materials Science Lab atory, Universi y of Belgrade, Belgrade, Serbia b Center for synthesis, processing and characterization of mat rials for applicatio in the extr me conditions, Belgrade, Serbia c University of Belgrade, Faculty of Mechanical Engineering, Belgrade, Serbia Abstract One of the recent trends in materials science a d technology is the rese rch of the behavior of the materials under the extreme conditions both on the theoretical and experim ntal basis. There are limitations of the experimental methods, however, theoretical approach can be used as a supplement to the experimental results. As a conseq e ce, in the last two decades a vast number of structure predicti n calculations have been performed on chemical systems, focusing on the high-pressure and high temperature phases. In this work, we wo ld like to present several computational studies and their connection to the a tual synthesis routes: l ad sulfide (PbS), barium sulfide (BaS), and aluminum nitride (AlN). The investigated compounds were calculated on ab initio level using the most advanced tools in quantum chemistry and co putational material science including Hartree-Fock Theory, Density Functional Theory (DFT) and Hybrid (B3LYP) Approximation. Their struct ral, mechanical, elastic and vibrational prop rties have been investigated nd in addition, we show truct re candidates as the function of size, pressure and temperature and not re iously observed in any of the investiga ed materials thus creating new possibili es for synthesis of advanced materials with improved physical, chemical, and/or mech nical properti s. © 2018 The Authors. Published by Elsevier B.V. Peer-review under responsibility of the ECF22 organizers. © 2018 The Authors. Published by Elsevier B.V. Peer-review under responsibility of the ECF22 organizers. Abstract

© 2016 The Authors. Published by Elsevier B.V. Peer-review under responsibility of the Scientific Committee of PCF 2016. Keywords: ab initio ; properties ; advanced materials ; extreme conditions. Keywo ds: ab initio ; properties ; advanced materials ; extreme conditions.

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 Th 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. * Correspon ing author. Tel.: +381-11-340-8545; fax: +381-11-644-7335. E-mail address: dzagorac@vinca.rs * Corresponding author. Tel.: +381-11-340-8545; fax: +381-11-644-7335. E-mail address: dzagorac@vinca.rs

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.2018.12.216