PSI - Issue 1

ScienceDirect Procedia Structural Integrity 1 (2016) 257–264 Available online at www.sciencedirect.com Av ilable o line at ww.sciencedire t.com cienceDirect Structural Integ ity Procedia 00 (2016) 000 – 000 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. XV Portuguese Conference on Fracture, PCF 2016, 10-12 February 2016, Paço de Arcos, Portugal Cracki g study of a reinforced concrete beam Ismael Sánchez Ramos a* , Omar Aït-Salem Duque a , MªConsuelo Huerta Gómez de Merodio b , Natalia Pozhilova a b* a MSC Sosftware Simulating Reality S.A., Av. Manoteras, 32, 28050 MADRID (SPAIN) b E.T.S. Ingenieros Industriales-Univ. Politécnic de Madrid, C/José Gutiérrez Abascal, 2, 28006 MADRID (SPAIN) Abstract Reinforced concrete beam behaviour is studied during cracking by means of a finite element model. Dynamic and static experimental test results made in E.T.S. Ingenieros Industriales of Madrid have been used to develop this work. A detailed description of the model has been done as well as a sensibility analysis in order to define cracking parameters. Model and experimental test results have been compared. Finally, the evolution of a crack in concrete beam has been simulated using VCCT (Virtual Crack Closure Technique). © 2016 The Authors. Published by Elsevier B.V. Peer-review under responsibility of the Scientific Committee of PCF 2016. Keywords: reinforced concrete, cracking, finite elements, VCCT 1. In roduction The main objective of this project is to simulate the global behaviour (statics and dynamics) of a reinforced concrete beam under different cracking levels, using only one finite element model. Previously, some finite element models of the same concrete beam were done in the Structures Department of the E.T.S.I.I.M, in order to reproduce both static and dynamic behaviour. However, these models only succeeded in the simulation either static or dynamic behaviour separately. XV Portuguese Conference on Fracture, PCF 2016, 10-12 February 2016, Paço de Arcos, Portugal Cracking study of a reinforced concrete beam Ismael Sánchez Ramos a* , Omar Aït-Salem Duque a , MªConsuelo Huerta Gómez de Merodio b , Natali Pozhilova a b* a MSC Sosftware Simulating Reality S.A., Av. Manoteras, 32, 28050 MADRID (SPAIN) b E.T.S. Ingenieros Industriales-Univ. Politécnica de Madrid, C/José Gutiérrez Abascal, 2, 28006 MADRID (SPAIN) Abstract Reinforced concrete beam behaviour is studied during cracking by means of a finite element model. Dynamic and static experimental test results ade in E.T.S. Inge iero I dustriales of Madrid have been us d to develop this work. A detailed desc iption of the model h s been done as well a a sensibi ity analysis in order to define cracking paramete s. Mo l an expe imental test results have be n compared. Finally, th evolution of a crack in concrete beam h s been simula d using VCCT (Virtual Crack Closure Techniqu ). © 2016 The Authors. Published by Elsevier B.V. Peer-review under espons bility of the Scientific Committee of PCF 2016. Keywords: reinforced concrete, cracking, finite elements, VCCT 1. Intro uction The main objective of this proj ct is to simulate the global behaviour (statics and dy amics) of a reinforced concrete beam under different cracking levels, using only one finite element model. P viously, some f nite element mod ls of the same concrete b am were done in the Structures Department of the E.T.S.I.I.M, in order to reproduce both static and dynamic behaviour. However, these models only succeeded in the simulation either static or dynamic e aviour separately. Copyright © 2015 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 he Sci ntific Committ e of PCF 2016. © 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.: +34 648 092 774 E-mail address: n.pozhilova@alumnos.upm.es; natalia.pozhilova@mscsoftware.com * Corresponding author. Tel.: +34 648 092 774 E-mail address: n.pozhilova@alumnos.upm.es; natalia.pozhilova@mscsoftware.com

* 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 PCF 2016. 2452-3216 © 2016 The Authors. Published by Elsevier B.V. Peer-review under responsibility of the Scientific Committee of PCF 2016.

2452-3216 © 2016 The Authors. Published by Elsevier B.V. Peer-review under responsibility of the Scientific Committee of PCF 2016. Copyright © 2015 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 PCF 2016. 10.1016/j.prostr.2016.02.035