PSI - Issue 2_B

ScienceDirect Available online at www.sciencedirect.com Av ilable o line at www.sciencedire t.com ScienceDirect Structural Integrity Procedia 00 (2016) 000 – 000 Procedia Struc ural Integrity 2 (2016) 2084–209 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 Study of Dissipation Properties and Structure Evolution in Metals with Different Grain Size under HCF and VHCF Loadings O. Plekhov a *, O. Naimark a , M. Narykova b , A. Kadomtsev b , V. Betechtin b a ICMM UB RAS, 1 Ak. Koroleva str., 614014 Perm, Russia b The Ioffe Institute, 26 Politekhnicheskaya, 194021 St Petersburg, Russia Abstract The dissipation properties, evolution of the dilatation and elastic properties in sub-microcrystalline titanium Grade 4 samples loaded in HCF and VHCF regime were investigated. The dissipation properties were studied based on self-heating (Risitano) test. The mechanical properties (elastic modulus, amplitude-independent damping) and dilatation for a set of samples with different degrees of the life time exhaustion were studied based on the acoustic resonance method. The dilatation was studied by the method of hydrostatic weighing. The experimental results show the increasing of energy dissipation in s bmicrocrystalline titanium a d absence the characteristic knee point on the graph of dependence of temperature rise versus tr ss amplitude for this material in self-he ting test. The structur l investigation shows the decr asing of elas c properties during fatigue loading and incr asing of ilatation. © 2016 Th Authors. Published by Elsevier B.V. Peer-revie under responsibility of the Scientific Committee of ECF21. Keywords: infrared thermography; self-heating test; VHCF fatigue In this work we investigated the dissipation properties, evolution of the dilatation and elastic properties in sub microcrystalline titanium (SMC) Grade 4 samples loaded in HCF and VHCF regime. Progress in developing methods for the manufacture of bulk SMC m tals has made possible the industrial-scale production of these materials and studies focused on their prospects for practical application. 21st European Conference on Fracture, ECF21, 20-24 June 2016, Catania, Italy Study of Dissipation Properties and Structure Evolution in Metals with Different Grain Size under HCF and VHCF Loadings O. Plekhov a *, O. Naimark a , M. Narykova b , A. Kadomtsev b , V. Betechtin b a ICMM UB RAS, 1 Ak. Koroleva str., 614014 Perm, Russia b The Ioffe Institute, 26 Politekhnichesk ya, 19402 St Petersburg, Russia Abstract The dissipation properties, evolution of the dilatation and elastic properties in sub-microcrystalline titanium Grade 4 samples loaded in HCF and VHCF regime were investig ted. The dissipation p opertie were studied based on self-heating (Risitano) test. The mech ical properties (elastic modulus, amplitu e-indepe dent damping) and dilatation for a set of sample with different degrees of the lif time exhaustion were studied based on the acoustic reson ce me hod. The dila ation was studied by the m thod of hydrostatic weigh ng. The experimental results show the increasing of energy dissipation in submicrocrystalline titanium nd abs nce the characterist c k ee point on the grap of dep ndence of t mperature rise versus tress amplitud for this mat ial n self-heating tes . The s ructural investigation shows the ecreasin of elast c pr p tie during fatigue loading and incre si g of dilatation. © 2016 The Authors. Published by Elsevi r B.V. Peer-review under espons bility of the Scientific Committee of ECF21. Keywords: infrared thermography; self-heating test; VHCF fatigue 1. Introduction In this work we inve tigated th dissipation properties, evolution of the dilatation and elastic properties in sub microcrystalline titanium (SMC) Grade 4 samples loaded in HCF and VHCF regime. Progress in d veloping eth ds for th m ufacture of bulk SMC etals h s made possible the industrial-scale production of these aterials and studies focused on their prospects for practical application. 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. © 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. 1. Introduction

* Corresponding author. Tel.: +351 218419991. E-mail address: amd@tecnico.ulisboa.pt 2452-3216 © 201 6 The Authors. Published by Elsevier B.V. Peer-review under respons bility of the Scientific Committee of ECF21. 2452-3216 © 201 6 The Authors. Published by Elsevier B.V. Pee review under r sponsibility of the Scientific Committee of ECF21. * Corresponding author. Tel.:+7-342-237-8321; fax: +7-342-237-8487. E-mail address: poa@icmm.ru * Corresponding author. Tel.:+7-342-237-8321; fax: +7-342-237-8487. E-mail ad ress: poa@icmm.ru

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.2016.06.261