PSI - Issue 11

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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 Procedia Structu al Integrity 11 (2018) 114–121 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 Damages in weld joint of water elevated reservoir steel structures Hizadora Constanza Medina D'Ambros a *, Thiago Dias De Araújo Silva a , Esequiel Fernandes Teixeira Mesquit b , Renato F rreira Barros a a Instituto Federal de Educação, Ciência e Tecnologia do Tocantins, AE 310 Sul Avenida LO 05 s/n, Palmas 77021-090, Brazil b Fundação Núcleo de Tecnologia Industrial do Ceará, Rua Prof. Rômulo Proença, Fortaleza 60440-552, Brasil Water elevated reservoirs are commonly designed for drinking water storage in small communities. Usually they comprise prefabricated st el structures of elev ted tanks, especially due to fast assembly of the component parts once parts of the structure just need to be connected. That one was the construction system used in small communities in the State of Tocantins, Brazil. However, weld joint failures have caused degradation and damage occurrence in the water elevated reservoir components welded by Shielded Metal Arc Welding (SMAW) process that uses a flux-coated electrode to form the weld. In this work, an investigation was carried out in order to analyze the existence of pathologies in the welded joints in the water elevated reservoir located in Tocantins. Following, the components were tested to tensile strength (NBR 6892-1: 2013) in plates equal to those used in water elevated reservoirs and with joints welded intentionally with the same identified pathology. The damages found by visual analysis were related to fast cooling, slag inclusions, high and low welding amperage and moist welding electrodes. Concerning the tensile strength test, joint welded with low welding amperage and joint welded with moist welding electrodes presented more damages, results that evidenced the importance of the quality control of the weld in this construction system. Copyright © 2018 Elsevier B.V. All rights res rved. Peer-review under responsibility of he CINPAR 2018 organiz rs Keywords: Damage ; Steel s ructures; Weld jo n ; Wate elevated r servoir 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 Damages in weld joint of water elevated reservoir steel structures Hizadora Constanza Medina D'Ambros a *, Thiago Dias De Araújo Silva a , Esequiel Fernandes Teixeira Mesquita b , Renato Ferreira Barros a a Instituto Federal de Educação, Ciência e Tecnologia do Tocantins, AE 310 Sul Avenida LO 05 s/n, Palmas 77021-090, Brazil b Fun ação Núcleo de Tecnologi Industrial do Ceará, Rua Prof. Rôm lo Proença, Fortaleza 60440-552, Brasil Abstract Water elevated reservoirs are commo ly desi ned for drink ng water storage in small c mmunitie . Usually they comprise prefabricated steel structures of elevated tanks, especially due to fast ssembly of the component parts once p rts of the structur just need to be connected. That one was the construction system used in small communities in the State of Tocantins, Brazil. However, weld joi t failures ve caused degradation and damage occurrence in the water el vated reservoir compo e ts welded by Shi lded Metal Arc Welding (SMAW) process that uses a flux-coated electrode to form th weld. In this work, an investigation was carried out in order to analyze the existence of pathologies in th welded joints in the ater elevated reservoir located in Tocantins. Foll wing, the components w r tested to tensile strength (NBR 6892-1: 2013) in plates equal to those used in water elevated reservoirs and with joints weld d intentionally with the same identified pathology. The damages f und by visual analysis were related to fast cooling, slag inclusions, high and low welding amperage and moist welding electrodes. Concerning the tensile str ngth test, j int welded with low welding amperage and joint welded with moist welding electrodes presented more damages, results that evidenc d the importance of the quality control of the weld in this constru tion system. Copyright © 2018 Elsevier B.V. All rights reserved. Peer-revi w under responsibility of the CINPAR 2018 organizers Keywo ds: Damag s; Steel structures; Weld joint; Wat r elevated reservoir Abstract

Keywords: High Pressure Turbine Blade; Creep; Finite Element Method; 3D Model; Simulation.

* Corresponding author. Tel.: +55 63 981388459. E-mail address: hizadoraconstanza@hotmail.com * Corresponding author. Tel.: +55 63 981388459. E-mail ad ress: hizadoraconstanza@hotmail.com

* 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.

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