PSI - Issue 2_B

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 Struc ural Integrity 2 (2016) 1015–1022 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 Modelling of Phased Array Ultrasonic Inspection of a Steam Generator Dissimilar Metal Weld Szabolcs Szávai a, *, Zoltán Bézi b , Judit Dudra c , István Méhész d a Head of Department, Iglói street 2., Miskolc 3519, Hungary* b, c Research Fellow, Iglói street 2., Miskolc 3519, Hungary* d Head of Laboratory, Iglói street 2., Miskolc 3519, Hungary* *Bay Zoltán Nonprofit Ltd. for Applied Research, Engineering Division (BAY-ENG) Abstract Phased array ultrasonic techniques (PAUT) are more and more used for inspection of the primary circuit of nuclear power plants in order to detect defects such as stress corrosion cracking (SCC) at the dissimilar metal welds (DMWs) between the main pipe lines and large components such as the pressure vessel, steam generators and pressurizers. Nevertheless, disturbances such as beam splitting and skewing may occur due to the anisotropic and inhomogeneous properties of the welding material. These disturbances affect the detecti n, loc lization and sizing of possible weld discontinuities. Simulation tools can help to understand these physical phenomena, optimize ultrasonic testing. Sin e strict afety requirements are leading to increased demands for the insp ction of such components, a research task called MAPAID has been de icated under th umbrella of “NUGENIA+” FP7 proj ct to mod l nd validate AUT t chniques for inspection of MWs of nuclear powe plants. As a part of the task, this study presents the phased array ultr sonic inspections and ultrasonic simulations of steam generator DMW. The testing has been recently evelop d in the CIVA in order to det rmine the index distances regarding the given rientation artificial defect analysis and the incident angles for longitudinal and transversal tests. By comparing the experimental and simulation tests results, conclusions can be drawn to quantitatively assess the contribution of phased array techniques to improved NDE performances of such parts, as well as the ability of simulation to help for design, optimization and interpretation of such inspections. Szabo , , ied o c he 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. © 2016 The Authors. Published by Elsevier B.V. Peer-review under responsibility of the Scientific Committee of ECF21. Keywords: Steem generator, dissimilar metal weld, DMW, phased array ultrasonic inspection, PAUT; ibi t Keywords: High Pressure Turbine Blade; Creep; Finite Element Method; 3D Model; Simulation. 16

* Szabolcs Szávai. Tel.: +36-70-205-6455; fax: +36-46-422-786. E-mail address: szabolcs.szavai@bayzoltan.hu

* 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 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.2016.06.130