PSI - Issue 11

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ScienceDirect Available online at www.sciencedirect.com Available online at www.sciencedire t.com ienceDirect Structural Integrity Procedia 00 (2016) 000 – 000 Procedia Structu al Integrity 11 (2018) 99–106 Available online at www.sciencedirect.com ScienceDirect Structural Integrity Procedia 00 (2018) 000 – 000 Available online at www.sciencedirect.com ScienceDirect Structural Integrity 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. XIV International Conference on Building Pathology and Constructions Repair – CINPAR 2018 Detection of precipitation infiltration in buildings by infrared thermography: a case study J.H.A. Rocha a, *, C.F. Santos b , Y.V. Póvoas b a Universidad Privada del Valle, Calle Guillermina Martínez s/n, Tiquipaya, Bolivia b Universidade de Pernambuco, Av. Agamenon Magalhães, Recife, Brazil Infrared thermography has recently been used in civil work inspection to detect various types of pathological manifestations due to its speed, easy handling, and capability to cover large areas and detect hidden faults, among other advantages. The specific implementation for humidity detection in buildings still presents some uncertainties, since parameters that influence results are present, for example: mechanisms that generate humidity, specific conditions of premises being studied and constructive characteristics of the building. This work is intended to evaluate the infrared thermography technique for moisture detection originated by pluvial precipitation. In this sense, a building with pathological manifestations caused by precipitation was selected to be inspect d at differe t ti es of the day in order to observe behavior of this pr blem dur rainy seaso . Results showed that infrared thermograp y wa sensitive to detect area affected by precipitation humidi y presenting lower temperatures than those sectors without a y problem. Furthermore, the higher the temp rature difference, the better definition of the a ea affected by the humidity was, thus allowing the location of potential spots. Infrared thermography w s presente as an auxiliary tool for inspections, as it provided more information than a simple visual inspection; however, some factors must be considered in order for the inspection to be effective. Copyright © 2018 Elsevier B.V. All rights reserved. Peer-review under responsibility of the CINPAR 2018 organizers 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 Detection of precipitation infiltration in buildings by infrared thermography: a case study J.H.A. Rocha a, *, C.F. Santos b , Y.V. Póvoas b a Universidad Privada del Valle, Calle Guillermina Martínez s/n, Tiquipaya, Bolivia b Universidade de Pern mbuco, Av. Aga e on Magalhães, Recife, Brazil Abstract Infrared thermography has recently been used in civil work inspection to detect various types of pathological manifestations due to its speed, easy handling, and capability to cover large areas and detect hidden faults, among other adv ntages. The specific implementation for humidity detection in buildings still presents som uncertainties, since parameters that influ nce r sults are pres nt, for example: mechanisms that generate humidity, specific conditio s of premises being studied and con tructiv charac eristics of th building. This work is intended to evaluate the infrared thermography tech ique for moisture dete tion origina ed by pluvial precipitation. In this sense, a building with pathologic l manifestations caused by precipitation was selected to be inspected at diffe nt times of the day i order to observe behavior of this problem during rainy season. Results show d that infrared thermography was sen itive to etect a eas affect d by precipitation humid ty pre enting low r temperature than those sectors without any problem. F rthermor , the higher the temperature differenc , the bett r efinition of the are affected by th humidity was, thus allowing the location of potential spots. Infrare thermography was presented as an auxiliary tool for inspections, as it provided more information than a simple vi ual insp ction; however, some factors must be considered in orde for the nspection to be effectiv . Copyright © 2018 Elsevier B.V. All rights reserved. Peer- eview under re ponsibility of the CINPAR 2018 organizers Keywords: Infrared thermography; pathological manifestations; moisture. Abstract

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 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 CINP R 2018 organizers. * Corresponding author. Tel.: +591 5983072; fax: +591 5983072. E-mail address: jaquinor@univalle.edu * Corresponding author. Tel.: +591 5983072; fax: +591 5983072. E-mail ad ress: jaquinor@univalle.edu

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