PSI - Issue 11

ScienceDirect Available online at www.sciencedirect.com Av ilable o line at ww.sciencedire t.com ScienceDirect Structural Integrity Procedia 00 (2016) 000 – 000 Procedi Structural Integrity 11 8 6 –67 Available online at www.sciencedirect.com ScienceDirect Structural Integrity Procedia 00 (2018) 000 – 000 Available online at www.sciencedirect.com ScienceDirect Structural Int grity Procedia 00 (2018) 000 – 000

www.elsevier.com/locate/procedia www.elsevier.com/locate/procedia

www.elsevier.com/locate/procedia

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 Carbonated structures in Paraguay: Durability strategies for maintenance planning Pablo Benítez* ,a , Fernanda Rodrigues a , Sergio Gavilán b , Humberto Varum c , Anibal Cos a a a RISCO, Department of Civil Engineering, University of Aveiro, Campus Universitário Santiago, 3810-193 Aveiro, Portugal b Department of Engineering, National University of Asunción, 2160 San Lorenzo, Paraguay c CONSTRUCT-LESE, FEUP, University of Porto, Rua Dr. Roberto Frias, 4200-465 Porto, Portugal Abstract This work provides an analysis of results obtained in a set of carbonation tests performed in 38 concrete structures buildings located in the city of Asunción, Paraguay. This analysis has shown that structures present high values of carbonation depth, identifying the cover thickness as the most important parameter in terms of durability. Therefore, the aim of this paper is to give an outlook for optimal inspections in the context of maintenance strategies regarding carbonation-induced degradation of concrete structures in Paraguay. The optimisation problem is formulated through a quantification of cost components over the lifespan of structures, where the opt mal inspection plan is consider d when a inimum total exp c st of mai tenanc is accomplished. Copyright © 2018 Elsevier B.V. All rights reserved. Peer-review under responsibility of the CINPAR 2018 organizers Keywords: Carbonation, In situ testing, Durability, Inspection, Optimisation. 1. Introduction Infrastructures are vulnerable to the interaction with the surrounding environment, leading to anomalies which jeopa dize its durability. The use of Reinforced Concr te (R ) in structures has overcome the use of other materials such as steel, wood or ceramics materials due to an improvement in the durability against a more intense environmental aggressiveness. Nevertheless, the durability of concrete is restricted to a certain time-period related to the ability to XIV International Conference on Building Pathology and Constructions Repair – CINPAR 2018 Carbonated structures in Paraguay: Durability strategies for maintenance planning Pablo Benítez* ,a , Fernanda Rodrigues a , Sergio Gavilán b , Humberto Varum c , Anibal Costa a a RISCO, Department of Civil Engineering, University of Aveiro, Campus Universitário Santiago, 3810-193 Aveiro, Portugal b Department of E gineering, National Unive sity of Asunción, 2160 San Lorenzo, Paraguay c CONSTRUCT-LESE, FEUP, U iversity of Porto, Ru Dr. Roberto Frias, 4200-465 Porto, Portugal Abstract This work provides an analysis of results obtained in a set of carbonation tests performed in 38 concrete structures buildings located in the city of Asunción, Paraguay. This analysis has shown th t structures present high values of carbonation depth, ide tifying the cover thickness as the most important parameter in terms of durability. Therefore, the aim of this paper is to give an outlook for optimal insp ctions in the context of maintenance strategies reg rding carbonation-induced degradation of concr te str ctures in Paraguay. The optimisation problem is formulat d through a quantification of cost components over the lifespan of structures, where the optimal inspection plan is considered when a minimum total expected st of aint ance is accomplished. Copyright © 2018 Elsevier B.V. All rights reserved. Peer-review under responsibility of the CINPAR 2018 organizers Keywords: Carbonation, In situ testing, Durability, Inspection, Optimisation. 1. Introduction Infrastructures are vulnerable to the interaction with the surrounding environment, leading to anomalies which jeopardize its d rability. The use of Reinforced Concrete (RC) in structures has overcome the use of other materials such as steel, wood or ceramics materials due to an improvement in the durability against a more intense environmental aggressiveness. Nevertheless, the durability of concrete is restricted to a certain time-period related to the ability to © 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.: +39-389-019-6961 E-mail address: pablo.benitez@ua.pt * Corresponding author. Tel.: +39-389-019-6961 E-mail ad ress: pablo.benitez@ua.pt

* 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.

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.2018.11.009