PSI - Issue 6

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ScienceDirect Available online at www.sciencedirect.com Av ilable o line at ww.sciencedire t.com Sci ceDirect Structural Integrity Procedia 00 (2016) 000 – 000 Procedia Structu al Integrity 6 (2017) 19 –195 ScienceDirect Structural Integrity Procedia 00 (2017) 000 – 000 Available online at www.sciencedirect.com ScienceDirect Structural Integrity Procedia 00 (2017) 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. Copyright © 2017 The Authors. Published by Elsevier B.V. Peer-review under responsibility of the MCM 2017 organizers. XXVII International Conference “Mathematical and Computer Simulations in Mechanics of Solids and Structures”. Fundamentals of Static and Dynamic Fracture (MCM 2017) Behavior of the grade 5 titanium alloy in different structural states in onditions of high-speed erosion S.A. Atroshenko a,b * , A.D. Evstifeev b , N.A. Kazarinov b , Yu.V. Petrov a,b , R.Z. Valiev b a IPME RAS, V.O., Bolshoy, 61, St.Petersburg, 199178, Russia b SPbSU, Universitetskaya Embankment, 7/9, St.-Petersburg,199034, Russia Abstract Behavior of a Grade 5 titanium alloy after high pressure torsion (HPT) and equal channel angular pressing (ECAP) under conditions of high-speed erosion was studied. Samples of the alloy in the ultrafine-grained state after the HPT and ECAP treatment were tested in an abrasive flow with various velocities using a technique similar to those presented in article Petrov et al. (2017). Two abrasive powders were used: with 109 and 230 μm average particle size. The tests were carried out at room temperature. Fracture surface parameters were studied for all tested specimens and fracture type (ratio of viscous and brittle fracture) was evaluated in each case. Additionally, surface roughness mass loss dependencies on particle flow velocity was investigated for both HPT and ECAP samples. © 201 7 The Authors. Published by Elsevier B.V. Peer-review under responsibility of the MCM 2017 rganizers. Keywords: Grade 5 titanium, HPT, ECAP, high-speed erosion XXVII International Conference “Mathematical and Computer Simulations in Mechanics of Solids and Structures”. Fundamentals of Static and Dynamic Fracture (MCM 2017) Behavior of the grade 5 titanium alloy in ifferent structural states in conditions of high-speed erosion S.A. Atroshenko a,b * , A.D. Evstifeev b , N.A. Kazarinov b , Yu.V. Petrov a,b , R.Z. Valiev b a IPME RAS, V.O., Bolshoy, 61, St.Petersburg, 199178, Russia b SPbSU, Universitetskaya Embankment, 7/9, St.-Petersburg,199034, Russia Abstract B havior of a Grade 5 titanium alloy after high pressure tor ion (HPT) a d equal channel angular pressi g (ECA ) und r conditions of high-speed erosion as st died. Samples of the alloy in the ultrafine-grained state aft r the HPT and ECAP treatment were tested in an abrasive flow ith various velocities using a technique similar to thos presented in article Petrov et al. (2017). Two br sive powders were used: with 109 nd 230 μm aver ge particle size. The tests were carried out at room temperature. Fracture surf ce parameters were studied for all tested specimens and fracture type (ratio of viscous and brittle fracture) was evaluated in each case. Additionally, surface roughness mass loss dependencies on particle flow velocity was investigated for both HPT and ECAP samples. © 201 7 The Authors. Published by Elsevier B.V. P er-review under responsibility of the MCM 2017 organizers.

Keywords: Grade 5 titanium, HPT, ECAP, high-speed erosion

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 © 2017 The Authors. Published by Elsevier B.V. Peer-review under responsibility of the MCM 2017 organizers. 2452- 3216 © 2017 The Authors. Published by Elsevier B.V. Peer-review under responsibility of the MCM 2017 organizers. * Svetlana Atroshenko. Tel.: +7-812-321-4765; fax: +7-812-321-4771. E-mail address: satroshe@mail.ru * Svetlana Atroshenko. Tel.: +7-812-321-4765; fax: +7-812-321-4771. E-mail address: satroshe@mail.ru

2452-3216 Copyright  2017 The Authors. Published by Elsevier B.V. Peer-review under responsibility of the MCM 2017 organizers. 10.1016/j.prostr.2017.11.029

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