PSI - Issue 2_A

ScienceDirect Available online at www.sciencedirect.com Av ilable o line at ww.sciencedire t.com cienceDirect Structural Integrity Procedia 00 (2016) 000 – 000 Procedia Struc ural Integrity 2 (2016) 3415–3422 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 Dama e investigation in A319 aluminum alloy by digital image correlation during in-situ tensile tests Zaidao Li a, b, *, Nathalie Limodin a , Amina Tandjaoui a , Philippe Quaegebeur a , Jean-François Witz a , David Balloy b a Laboratoire de Mécanique de Lille (LML), FRE CNRS 3723, Ecole Centrale de Lille, 59651 Villeneuve d’Ascq cedex, France b Unité Matériaux et Transformations, UMR CNRS 8207, Univ. Lille 1, 59655 Villeneuve d’Ascq cedex, France Abstract The aim of this work is to analyse the strain fields heterogeneity in a Die Casting A319 aluminium alloy during tensile loading. The microstructure characterization of the studied alloy was performed in 2D and 3D, the microstructure consists of hard inclusions (i.e. eutectic Si and Al 2 Cu phases) and micropores. In order to study the role of the different hard particles on the propagation of cracks, an experimental protocol was set up and surface damage observations are performed in real-time with an in situ microscopic device during tensile test which allows following the development and localization of the deformation and cracks. The results showed the role of eutectic Si and Al 2 Cu phases in the crack propagation by DIC measurement and fractography. Cracks often propagate through the fracture of Al 2 Cu, as well as through fragmented Si particles rather than by their decohesion from the matrix. © 2016 The Authors. Published by Elsevier B.V. Peer-review under responsibility of the Scientific Committee of ECF21. Keywords: Aluminium alloys; Digtial Image Correlation; damage; fractography 1. Introduction Aluminum-silicon (Al-Si) alloys, which are characterized by their excellent castability, high thermal conductivity and low thermal expansion coefficient, are often used for the production of automotive parts such as cylinder heads (Kaufman and Rooy, 2004). However, as the alloy properties are highly influenced by the microstructure, such as 21st European Conference on Fracture, ECF21, 20-24 June 2016, Catania, Italy Damage investigation in A319 aluminum alloy by digital image correlation during in-situ tensile tests Zaidao Li a, b, *, Nathalie Limodin a , Amina Tandjaoui a , Philippe Quaegebeur a , Jean-François Witz a , David Balloy b a Laboratoire de Mécanique de Lille (LML), FRE CNRS 3723, Ecole Centrale de Lille, 59651 Villeneuve d’Ascq cedex, France b Unité atériaux et Transformations, UMR CNRS 8207, Univ. Lille 1, 59655 Villeneuve d’Ascq cedex, France Abstract The aim of this work is to analyse the strain fields heterogeneity in a Die Casting A319 aluminium alloy during tensile loading. micr s ructure characterization of the studied alloy was perform d in 2D and 3D, the microstruct e consists f hard inclusions (i.e. e t ctic Si and Al 2 Cu phase ) and micr pore . In order to study the role of the different hard part cles on the propagation of cracks, an experimental protocol was set up and surfac damage obs rvations ar per o med in real- m with an in situ microscopi device during tensile test which allows following the dev l pm nt and localizati n of the defor ation and cracks. The results showed the role of eutectic Si and Al 2 Cu phases in the crack propagation by DIC measurement and f tograp y. Cracks often propagat through the fracture of Al 2 Cu, as well as th ough fragmented Si particles rather than by their decohesion from the matrix. © 2016 T Authors. Published by Elsevier B.V. Peer-review under espons bility of the Scientific Committee of ECF21. Keywords: Aluminium alloys; Digtial Image Correlation; damage; fractography 1. Introduction Aluminum-silicon (Al-Si) alloys, which are characterized by their excellent castability, high thermal conductivity and low thermal expansion coefficient, are often used for the production of automotive parts such as cylinder heads (Kaufman and Rooy, 2004). However, s the alloy properties are highly influenced by the mi rostructure, such a 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.

* 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 r sponsibility of the Scientific Committee of ECF21. * Corresponding author. Tel.: +3-365-206-9701; fax: +3-332-033-5393. E-mail address: zaidao.li@etudiant.univ-lille1.fr. * Corresponding author. Tel.: +3-365-206-9701; fax: +3-332-033-5393. E-mail address: zaidao.li@etudiant.univ-lille1.fr.

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.2016.06.426