PSI - Issue 11

ScienceDirect Available online at www.sciencedirect.com Av ilable o line at www.sciencedire t.com Sci ceDirect Structural Integrity Procedia 00 (2016) 000 – 000 P o edi Structural Integr ty 11 ( 8) 2–11 Available online at www.sciencedirect.com ScienceDirect Structural Integrity Procedia 00 (2018) 000 – 000 Available online at www.sciencedirect.com ScienceDirect Structural I tegrity 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. Copyright © 2018 Elsevier B.V. All rights reserved. Peer-review under responsibility of the CINPAR 2018 organizers XIV International Conference on Building Pathology and Constructions Repair – CINPAR 2018 Geomatics for structural assessment and surface diagnostic of CH Grazia Tucci*, Alessandro Conti, Lidia Fiorini GeCO Lab, DICEA, Università di Firenze, Via S. Marta 3, 50139 Firenze, Italy Abstract The capacity to rapidly acquire large quantities of spatial data, to geo-reference information on them, to obtain detailed models that allow more and more accurate analyses and simulations, place Geoinformatics at the center of attention in many research areas. Among these, the use of these techniques for the study of existing structures is particularly interesting. Assessing the current stability of a building, monitoring the evolution over time of a failure, preventing the potential causes of damage, simulating the behavior of a building under seismic actions, are just s me of the ways in which the ge metric properties of a structure, acquired with the most up-to-date automated surveying systems, are used to help validate structural integrity analyses Copyright © 2018 Elsevier B.V. All rights reserved. Peer-review under responsibility of the CINPAR 2018 organizers Keywords: Survey methodologies; Geomatics; Cultural Heritage documentation; HBIM; FEM; Diagnostics; 1. Introduction The only irrefutable evidenc of an architectural structure is the edifice itself; a scientific approach that deciphers the text of a construction, theref re, must be based on systematic observation and measurem nt f the building. The complexity of the relations between its elements, determined by their position in space, can only be systematically approached by a model that takes into account the reciprocal spatial relations of the collected data. For this reason, well before its analytic and descriptive geometry was rigorously defined, the survey – and its subsequent architectural representation in two and three dimensions, both on paper and in physical models – has constituted the main instrument for the study of its design, whether in the didactic setting of the ancient academies or in the current context of understanding the history and the necessary operations required to guarantee the preservation of a construction (Tucci 2003, Migliari 2004, Musso 2017). XIV International Conference on Building Pathology and Constructions Repair – CINPAR 2018 Geomatics for structural assessment and surface diagnostic of CH Grazia Tucci*, Alessandro Conti, Lidia Fiorini GeCO Lab, DICEA, Università di Firenze, Via S. Marta 3, 50139 Firenze, Italy Abstract The capacity to rapidly acquire large quantities of spatial data, to geo-reference information on them, to obtain detailed models that allow more and more accurate analyses and simulations, place Geoinformatics at the center of attention in many research areas. Among these, the use of these techniques for the study of existing structures is particularly interesting. Assessing the current stability of a building, monitori g the evolution over time of a failure, preventing the potential causes of damage, simulating the behavior of a building under seismic actions, are j st some of the ways in which the geometric properties of a structure, acquired with the most up-to-date automated surveying systems, are used to help validate structural integrity analyses Copyright © 2018 Elsevier B.V. All rights reserved. Peer-review under responsibility of the CINPAR 2018 organizers Keywords: Survey methodologies; Geomatics; Cultural Heritage documentation; HBIM; FEM; Diagnostics; 1. Introduction The only irr futable evidence of an architectural structur is the edifice itself; a scientific approach that d c phers the text of a construction, therefore, must be based on systematic observation and measurement of the building. The complexity of the relations between its elements, determined by their position in space, can only be systematically approached by a model that takes into account the reciprocal spatial relations of the collected data. For this reason, well before its analytic and descriptive geometry was rigorously defined, the survey – and its subsequent architectural representation in two and three dimensions, both on paper and in physical models – has constituted the main instrum nt for the study of s design, whether in the didactic setting of the ancient academies or in the current context of understanding the history and the necessary operations required to guarantee the preservation of a construction (Tucci 2003, Migliari 2004, Musso 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.: +39 055 27586587. E-mail address: grazia.tucci@unifi.it * Corresponding author. Tel.: +39 055 27586587. E-mail address: grazia.tucci@unifi.it

* Corresponding author. Tel.: +351 218419991. E-mail address: amd@tecnico.ulisboa.pt 2452-3216 Copyright © 2018 Elsevier B.V. All rights reserved. Peer-revi w u er responsibility of the CINPAR 2018 organizers. 2452-3216 Copyright © 2018 Elsevier B.V. All rights reserved. Peer-review under responsibility of the CINPAR 2018 organizers.

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

2452-3216 Copyright  2018 Elsevier B.V. All rights reserved. Peer-review under responsibility of the CINPAR 2018 organizers 10.1016/j.prostr.2018.11.002