PSI - Issue 13

ScienceDirect Available online at www.sciencedirect.com Available online at ww.sciencedire t.com Sci ceDirect Structural Integrity Procedia 00 (2016) 000 – 000 Procedia Structu al Integrity 13 (2018) 174–18 Available online at www.sciencedirect.com ScienceDirect Structural Integrity Procedia 00 (2018) 000–000 Available online at www.sciencedirect.com ScienceDirect Structural I t gri y Procedia 00 (2018) 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. © 2018 The Authors. Published by Elsevier B.V. Peer-review under responsibility of the ECF22 organizers. ECF22 - Loading and Environmental effects on Structural Integrity Temperature and Humidity Influence Analysis on the Behavior of Thick Composite Plates Using High Order Theory B. Boukert 1 , A. Benkhedda 1 , E.B. Adda 2 , M. Khodjet-Kesba 1 1 Laboratoire des Sciences Aéronautiques, Institut d’Aéronautique et des études spatiales, Université Blida 1, B.P 270 route de Soumaa, Algerie 2 Laboratoire de Matériaux et Hydrologie, Université de Sidi Bel Abbès,Algerie Abstract This study investigates the behavior of thick composite laminates using the high order method through hydrothermal stress calculation, the composite laminate is working in a hygrothermal environment, temperature and humidity are used and taken into account for stress calculation, different Simulations are carried out using different values of temperature and concentration, to see the influence of one on the other, other simulations are made by varying the distribution shape of temperature and humidity along the thickness of the laminate, the plate size is also taken into account in the simulations (a/b: ratio of length to width, a/h: ratio length to thickness). © 2018 The Authors. Published by Elsevier B.V. Peer-review under responsibility of the ECF22 organizers. Keywords: Thick composite plate, High Order, Hygrothermal, 1. Introduction The researcher i a ron utic field are very inter sted to composite materials, especially for structure part and engine, since composite materials have many advantages, like rigidity and lightness. During their service the aeronautical structures are subjected to variable conditions in terms of temperature and humidity, so the hygrothermal solicitations must be taken in consideration during calculation and simulations. Particular attention is given here to the behavior of the thick plates in hygrothermal environment. Many researches and investigations are made, to start with several theories of high order which satisfy the boundary conditions. Ambarsumian [1] proposed transverse shearing function to explain the deformation of laminates. ECF22 - Loading and Environmental effects on Structural Integrity Temperature and Humidity Influence Analysis on the Behavior of Thick Composite Plates Using High O der The ry B. Boukert 1 , A. Benkhedda 1 , E.B. Adda 2 , M. Khodjet-Kesba 1 1 Laboratoire des Sciences Aéronautiques, Institut d’Aéronautique et des études spatiales, Université Blida 1, B.P 270 route de Soumaa, Algerie 2 Laboratoire de Matériaux e Hydrologie, Universi é d Sidi B l Abbès,Algerie Abstract This study investigates the behavior of thick composite laminates using the high order method through hydrothermal stress calculation, the composite laminate is working in a hygrothermal environment, temperature and humidity are used and tak n into account for stress calcula ion, different Simulations are carried out using d fferent values of temperature and concentration, to see the influence of one on the other, other simulations are made by varying the distribution shape of temperature and humidity along the thickness of the laminate, the plate size is also taken into account in the simulations (a/b: ratio of length to width, a/h: ratio length to thickness). © 2018 The Authors. Published by Elsevier B.V. Peer-review under responsibility of the ECF22 organizers. Keywords: Thick composite plate, High Order, Hygrothermal, 1. Intro uction The res archer in aero autic field are very interested to composite materials, especially for structure part and engine, since composite materials have many advantages, like rigidity and lightness. During their service the aeronautical structures are subjected to variable conditions in terms of temperature and humidity, so the hygrothermal solicitations must be taken in consideration during calculation and simulations. Particular attention is given here to the behavior of the thick plates in hygrothermal environment. Many researches and investigations are made, to start with several t eories of high order which satisfy the boundary conditions. Ambarsumian [1] proposed transverse shearing function to explain the deformation of laminates. © 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.: +213 552 326 153. E-mail address: bilanosky@hotmail.fr * Corresponding author. Tel.: +213 552 326 153. E-mail address: bilanosky@hotmail.fr

* Corresponding author. Tel.: +351 218419991. E-mail address: amd@tecnico.ulisboa.pt 2452-3216 © 2018 The Authors. Published by Elsevier B.V. Peer-review under responsibility of the ECF22 organizers. 2452-3216 © 2018 The Authors. Published by Elsevier B.V. Peer review under r sponsibility of the ECF22 organizers.

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

2452-3216  2018 The Authors. Published by Elsevier B.V. Peer-review under responsibility of the ECF22 organizers. 10.1016/j.prostr.2018.12.029