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) 138–144 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. XIV International Conference on Building Pathology and Constructions Repair – CINPAR 2018 Employment of optical fibers for RC bond-slip characterization Esequiel Mesquita a, *, Paulo Antunes b , Nélia Alberto c , Carlos Marques b , José Melo a,d , Paulo S. André e , António Arêde a , H mberto Varum a a CONSTRUCT-LESE, Faculty of Engineering of University of Porto, Department of Civil Engineering, 4200-465 Porto, Portugal b Department of Physics & I3N, University of Aveiro and Instituto de Telecomunicações, Campus de Santiago, 3810-193 Aveiro, Portugal c Instituto de Telecomunicações, Campus de Santiago, 3810-193 Aveiro, Portugal d EPICentre, Department of Civil, Environmental & Geomatic Engineering, University College London, Gower Street, WC1E 6BT London, UK e Department of Electrical and Computer Engineering and Instituto de Telecomunicações, Instituto Superior Técnico, University of Lisbon, 1049 001 Lisbon, P rtugal Abstract Some features as workability, high durability and low cost of production have contributed for reinforced concrete (RC) be largely used worldwide. However, environmental actions and the natural material decaying are the most common processes that contribute for the loss of the physical-mechanical properties of the RC structures. When the bond between the concrete and the reinforci g rebar ar affected, the results can be extremely drama ic and unpredict d. In this work, a optical fiber device for the monitoring of the bon -slip of old RC structures, where less intrusive techniques need to be considered, is proposed and tested. The sensor developed is based on the fiber Bragg grating (FBG) technology, inscribed in silica optical fiber. A pull-out test was carried out in a RC specimen, following the recommendations of the Annex D of the EN 10080. The results showed that the bond-slip optical sensors are capable to measure micro-displacements, with lower intrusiveness. Therefore, they can be used for monitoring the bond-slip of old RC structures as way of to collect information, essential to assist the owners to adopt cost ffectiv , efficient and safer maintenance measures. XIV International Conference on Building Pathology and Constructions Repair – CINPAR 2018 Employment of optical fibers for RC bond-slip characterization Esequiel Mesquita a, *, Paulo Antunes b , Nélia Alberto c , Carlos Marques b , José Melo a,d , Paulo S. André e , António Arêde a , Humberto Varum a a CONSTRUCT-LESE, Faculty of Engineering of University of Porto, Department of Civil Engineering, 4200-465 Porto, Portugal b Department of Physics & I3N, University of Aveir and Inst ut de Telecomunicações, ampus de Santiago, 3810-193 Aveir , Portugal c Instituto de Telecomunicações, Campus d Santiago, 3810-193 Aveiro, Por u al d EPICentre, Department of Civil, Environmental & Geomatic Engineering, U iversity College Lond n, Gower Street, WC1E 6BT London, UK e Department of Elec rical and Compute Engi eering and Instituto de Telecomunicações, Instituto Superior Técnico, University of isbon, 1049 001 Lisbon, P rt gal Abstract Some features as workability, high durability and low cost of production have contributed for reinforced concrete (RC) be largely used worldwide. However, e vironmental actions and the natural material decaying are the most common processes that contribute for the loss of the physical-mechanical properties of the RC structures. When the b d between the concrete and the reinforcing rebar are affected, the results can be extremely dramatic and unpredicted. In this work, a optical fiber device for the monitoring of the bond-slip of old RC structures, where less intrusive tech iques need to be considere , is proposed and tested. The sensor develope is based on the fiber Bragg grating (FBG) t chnology, inscribe in silica optical fiber. A pull-out test was carried out in a RC specimen, following the recommendations of the Annex D of the EN 10080. The results showed that the bond-slip optical sensors are capable to measure micro-displacements, with lower intrusiveness. Therefore, they can be used for monitoring the bond-slip of old RC structures as way of to collect information, essential to assist the owners to adopt cost effective, efficient and safer maintenance measures. Copyright © 2018 Elsevier B.V. All rights reserved. Peer-review under responsibility of the CINPAR 2018 organizers © 2016 The Authors. Published by Elsevier B.V. Peer-review under responsibility of the Scientific Committee of PCF 2016. Copyright © 2018 Elsevier B.V. All rights reserved. Peer-review under responsi ility of the CINPAR 2018 organizers Keywords: Bond-slip; optical fiber; FBG sensors; SHM; RC; heritage constructions Copyright © 2018 Elsevier B.V. All rights reserved. Peer-review under responsibility of the CINPAR 2018 organizers Keywo ds: Bond-slip; optical fiber; FBG sensors; SHM; R ; heritag c nstructions

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.: +351-22-508-3791; fax: +351-22-508-1446. E-mail address: e.mesquita@fe.up.pt * Corresponding author. Tel.: +351-22-508-3791; fax: +351-22-508-1446. E-mail ad ress: e.mesquita@fe.up.pt

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