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) 1303–131 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 Developing of a new device for static and dynamic tests of Ni-Ti instruments for root canal treatment 1 G. La Rosa*, 1 F. Lo Savio, 2 E. Pedullà, 2 E. Rapisa da 1 Department of Industrial Eng neering, University of Catania, Viale Andrea Doria, 6 - 95125 Catania, Italy 2 Department of General Surgery and Surgical-Medical Specialties, University of Catania, O.V.E. II, Via Plebiscito 628, Catania , Italy Abstract The present work aims t design and carry out a torque device able to perform tatic and dynamic tests f N -Ti instruments f r root canal treatment. The realization of this device was carried out by the design and optimization performed on the single components and on the system globally. The device is mainly composed by a step-step motor operating on a lever with equal arms. The first one drives a chuck transmitting the torque to the base of the root canal instrument, while the second one is connected on one side to a pulley, connected to a second chuck that allows the locking of the free end of the root canal instrument. In order to verify the device efficiency, three series of different types of root canal instruments were tested. On these, the authors have designed and carried out an experimental campaign, consisting of static and dynamic tests: the first ones to measure the rotation and the torsional UTS, the second ones to measure the fatigue strength. © 2016 The Authors. Published by Elsevier B.V. Peer-review under responsibility of the Scientific Committee of ECF21. Keywords: Ni-Ti instruments; Torquemeter 1. Introduction During recent years, there has been a progressive tendency towards the use of nickel-titanium (Ni-Ti) rotary instruments for the preparation of the root canal (Thompson (2000), Kuhn and Jordan (2002)). At the same time, there was the appearance on the market of a large number of different Ni-Ti systems (Serene et al. (1995), Camps and Pertot (1995)). The manufacture of flexible instruments of varying characteristics (taper, shape, material, etc.) for using with low speed motors, air or electric, has provided the opportunity to the expert clinician to achieve predictable shapes of the channel with the highest increased speed and efficiency. In recent years, the use of rotary instruments in Ni-Ti 21st European Conference on Fracture, ECF21, 20-24 June 2016, Catania, Italy Developing of a new device for static and dynamic tests of Ni-Ti instrumen s for root canal treatment 1 G. La Rosa*, 1 F. Lo Savio, 2 E. Pedullà, 2 E. Rapisarda 1 Department of Industrial Engineering, University of Catania, Viale Andrea Doria, 6 - 95125 Catania, Italy 2 Department of General Surgery and Surgical-Medical Specialties, University of Catania, O.V.E. II, Via Plebiscito 628, Catania , Italy Abstract The present work aims to design and carry out a torque device able to perform static and dynamic tests of Ni-Ti instruments for root canal reatment. The r alization of this device was car ed out by the design optimizati n performed on th s ngle c mpo ents and on he system globally. The device is mainly composed by a step-step motor operating on a lever with equal arms. The first one drives a chuck transmitting the torque to the base f the root canal instrument, whil the second on is connected on one side to a pulley, connected to a seco d c uck that allows th locking f the free end of the root canal instrument. In order to verify device ef ici ncy, three seri s f different types of root canal instruments were tested. On these, the authors have design d and carried out an experim ntal campaign, consisting of static and dyna ic tests: th first o es to measure the rotation and the torsional UTS, the second o es to easure the fatigue streng h. © 2016 The Authors. Published by Elsevier B.V. Peer-review under espons bility of the Scientific Committee of ECF21. Keywords: Ni-Ti instruments; Torquemeter 1. Introduction During r cent years, there has bee a progressive t ndency towards the use of nickel-titanium (Ni-Ti) rotary instrume ts for the preparation of the root canal (Thompso (2000), Kuhn and Jordan (2002)). At the same time, the e was the appearanc on the market of a large number f different Ni-Ti systems (Sere e et al. (1995), Ca ps and Pertot (1995)). The manufactur of flexible instruments of varying characteristics (taper, shap , material, etc.) for using with low speed motors, air o lectric, has provided he opportunity to th expert clinician to achieve pr dictable hapes of the channel with the highest incre ed speed and efficiency. In recent y ars, the use of rotary instruments in Ni-Ti Copyright © 2016 The Authors. Published by Elsevier B.V. This is a open ac ess ar icle under the CC BY-NC-ND license (http://cre tivec mmons.org/l cens s/by-nc-nd/4.0/). Peer-review und r 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 und r 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.: +390957382413; fax: +39095337994; E-mail address: glarosa@dii.unict.it * Corresponding author. Tel.: +390957382413; fax: +39095337994; E-mail ad ress: glarosa@dii.unict.it

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.2016.06.166