PSI - Issue 10

ScienceDirect Available online at www.sciencedirect.com Av ilable o line at ww.sciencedire t.com ienceDirect Structural Integrity Procedia 00 (2016) 000 – 000 Procedia Structu al Integrity 1 (2018) 295–3 2 Available online at www.sciencedirect.com ScienceDirect Structural Integrity Procedia 00 (2018) 000 – 000 il l li t . i ir t. i i tr ct ral I te rit r ce ia ( )

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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. © 2018 The Authors. Published by Elsevier Ltd. This is an open access article under the CC BY-NC-ND license (http://creativecommons.org/licenses/by-nc-nd/3.0/) Peer-review under responsibility of the scientific committee of the 1st International Conference of the Greek Society of Experimental Mechanics of Materials. 1 st International Conference of the Greek Society of Experimental Mechanics of Materials Evaluation of organic coatings for corrosion protection of condensing economizers I. Iliopoulos a , A. Karampekios a , P.K. Pandis a , N. Vourdas a , H. Jouhara b , S. Tassou b , V.N. Stathopoulos a, * a Laboratory of Chemistry and Materials Technology, Depratment of Electrical Engineering, School of Technological Applications, Technological Educational Institute f Sterea Ellad , Psachna Campus, Evia, GR-34400, Greece b Institute of Energy Futures, Centre for Sustainable Energy Use in Food Chains, Brunel University London, Uxbridge, Middlesex, United Kingdom Abstract A corrosion protection of Stainless Steel (Grade 304) with low-cost commercial organic coatings (paints) was investigated in this study. Air sprayed Polyurethane (PU)-, Epoxy- and Acrylic-based commercial paints on the above substrate were tested for their anticorrosion properties in prospect of potential application for the protection of condensing economizers from industrial flue gases. PU and Epoxy coatings exhibited better corrosion protection efficiency of stainless steel than the acrylic coatings with values of 40, 39 and 28.1% respectively. This is in total agreement with corrosion current density trend calculated fro potentio dynamic polarization curves. Corrosion rates of coatings in 3.5% wt NaCl aqueous solutions were calculated at 0.065, 0.067 and 0.071 mpy for Epoxy, PU and Acrylic coatings respectively. Condensation phenomena and water collection rates (WCR) at various conditions are also provided. The highest WCR exhibited on the epoxy coatings reaching 1.987 ml m -1 h -1 at 40 o C and 100% RH. These data provide a full dataset for the designers of condensing economizer systems willing to incorporate organic coatings either at structural components or as touch up solutions. © 2018 The Authors. Publish d by Elsevier L d. This is an open access article under the CC BY-NC-ND license (http://creativecommons.org/licenses/by-nc-nd/3.0/). 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Publishe lse ier t . is is a e access article er t e - - lice se ( tt ://creati ec s. r /lice ses/ - c- / . /). eer-re ie er res o si ilit f t e scie tific c ittee f t e st I ter ati al fere ce f t e ree ciet f eri e tal ec a ics f aterials © 2016 The Authors. Published by Elsevier B.V. Peer-review under responsibility of the Scientific Committee of PCF 2016. ti l t

Keywords: High Pressure Turbine Blade; Creep; Finite Element Method; 3D Model; Simulation. Keywords: Condesning economizer; dropwise condensation; organic coating; corrosion; stainless steel ise c e sati ; r a ic c ati ; c rr si ; stai less steel ey r s: es i ec izer; r

* Corresponding author. Tel.: +30 22280 99688 E-mail address: vasta@teiste.gr Received: May 04, 2018; Received in revised form: July 25, 2018; Accepted: July 31, 2018 i a t r. el.: - il ress: asta teiste. r eceive : a , ; eceive i revise f r : J l , ; cce te : J l , rres

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2452-3216 © 2016 The Authors. Published by Elsevier B.V. Peer-review under responsibility of the Scientific Committee of PCF 2016. 2452-3216  2018 The Authors. Published by Elsevier Ltd. This is an open access article under the CC BY-NC-ND license (http://creativecommons.org/licenses/by-nc-nd/3.0/) Peer-review under responsibility of the scientific committee of the 1st International Conference of the Greek Society of Experimental Mechanics of Materials. 10.1016/j.prostr.2018.09.041 2452- 3216 © 2018 The Authors. Published by Elsevier Ltd. This is an open access article under the CC BY-NC-ND license (http://creativecommons.org/licenses/by-nc-nd/3.0/). Peer-review under responsibility of the scientific committee of the 1 st International Conference of the Greek Society of Experimental Mechanics of Materials is is a e access article er t e - - lice se ( tt ://creati ec s. r /lice ses/ - c- / . /). eer-re ie er respo si il t f t e scie tific c ittee f t e st I ter ati al fere ce f t e ree ciet f eri e tal ec a ics f aterials * Corresponding author. Tel.: +351 218419991. E-mail address: amd@tecnico.ulisboa.pt