PSI - Issue 5

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 5 (2017) 1355–1362 Available online at www.sciencedirect.com 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. 2nd International Conference on Structural Integrity, ICSI 2017, 4-7 September 2017, Funchal, Madeira, Portugal Material properties of 2024-T3 ALCLAD and 2124-T851 aluminum alloys using 2D and 3D Digital Image Correlation techniques Sahand Pourhassan a, *, Paulo J. Tavares a , Pedro M. G. P. Moreira a a INEGI, Universidade do Porto, Rua Dr. Roberto Frias, 400, Porto 4200-465, Portugal Abstract To characterize the rate dependency of materials using various testing machines, specimen geometries of materials are oftentimes required to be modified in order to fit on particular testing machine. Using well stablished standards for static tests may not be a practical choice for high strain rate testing machines such as Split Hopkinson Bar. The scope of this work is to propose and validate modified specimen geometries that could substitute standard geometries. Therefore, series of experiments were carried out on 2024-T3 ALCLAD and 2124-T851 aluminum alloys using Digital Image Correlation technique as a measurement method. © 2017 The Authors. Published by Elsevier B.V. Peer-review under responsibility of the Scientific Committee of ICSI 2017. Keywords: Digital Image Correlation; 2024-T3 ALCLAD aluminum alloy; 2124-T851 aluminum alloy 1. Introduction DIC is an optical method for full-field, non-contact 2D and 3D measurement of deformation and strain on the surface of components [1] . The application is based on the correlation of two images acquired at different loading states, at least one before deformation and another after. The recorded images are analysed and compared by a special 2nd International Conference on Structural Integrity, ICSI 2017, 4-7 September 2017, Funchal, Madeira, Portugal Material properties of 2024-T3 ALCLAD and 2124-T851 aluminum alloys using 2D and 3D Digital Image Correlation techniques Sahand Pourhassan a, *, Paulo J. Tavares a , Pedro M. G. P. Moreira a a INEGI, Universidade do Porto, Rua Dr. Roberto Frias, 400, Porto 4200-465, Portugal Abstract To characterize the rate dep ndency of materials using various testing machines, specimen geometries of material are oftentimes required to be modified in order to fit on particular testing machine. Using well stablished standards for static te ts may not be a practical choice f r high train rate t sting mac ines such as Split Hopkinson Bar. The scop f this work is to propose and validate modified specimen geometries that could substitute standard geometries. Therefore, series of xperiments were carried out n 2024-T3 ALCLAD and 2124-T851 alu inum alloys using Digital Image Correlation technique as a measurement method. © 2017 The Authors. Published by Elsevier B.V. Peer-review under responsibility of the Scientific Committee of ICSI 2017. Keywords: Digital Image Correlation; 2024-T3 ALCLAD aluminum alloy; 2124-T851 aluminum alloy 1. Introduction DIC is an optical meth d for full- ield, no -contact 2D and 3D measure ent of deformation and strain on the surface of components [1] . The application is based on the correlation of two images acquired at ifferent loading states, at least one before deformation and another after. The recorded images are analysed and compared by a special © 2017 The Authors. P blished by Elsevier B.V. Peer-review under responsibility of the Scientific Committee of ICSI 2017 © 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.

* Corresponding author. Tel.: +351-22-9578710. E-mail address: spourhassan@inegi.up.pt * Correspon ing author. Tel.: +351-22-9578710. E-mail address: spourhassan@inegi.up.pt

2452-3216 © 2016 The Authors. Published by Elsevier B.V. Peer-review under responsibility of the Scientific Committee of PCF 2016. 2452-3216  2017 The Authors. Published by Elsevier B.V. Peer-review under responsibility of the Scientific Committee of ICSI 2017 10.1016/j.prostr.2017.07.198 * Corresponding author. Tel.: +351 218419991. E-mail address: amd@tecnico.ulisboa.pt 2452 3216 © 2017 Th Authors. Published by Elsevier B.V. Peer-review under responsibility of the Scientific Committee of ICSI 2017. 2452-3216 © 2017 The Authors. Published by Elsevier B.V. Peer-review under responsibility of the Scientific Committee of ICSI 2017.