PSI - Issue 2_B

ScienceDirect Available online at www.sciencedirect.com Av ilable o line at ww.sciencedire t.com ScienceDirect Structural Integrity Procedia 00 (2016) 000 – 000 Procedia Struc ural Integrity 2 (2016) 2929–2935 Available online at www.sciencedirect.com ScienceDirect Structural Integrity Procedia 00 (2016) 000–000 Available online at www.sciencedirect.com ScienceDirect Structural Integrity Procedia 00 (2016) 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. 21st European Conference on Fracture, ECF21, 20-24 June 2016, Catania, Italy On the Fatigue Behavior of Bamboo Pulp Reinforced Cementitious Composites Eduardo F. Campello a , Marcos V. Pereira b,* , Fathi A. Darwish a , Khosrow Ghavami b a Fluminense Federal University, Depto of Civil Engineering, Passo da Pátria 156, Niterói – RJ, 24210-240, Brazil b Catholic University of Rio de Janeiro, Depto of Materials Engineering, Marquês de São Vicente 225, Rio de Janeiro – RJ, 22453-901, Brazil Abstract This work refers to an experimental study initiated with the purpose of evaluating the fatigue behavior of a cement base composite reinforced with bamboo pulp in the proportion of 6% of the weight of the dry cement. Specimens of the composite, in the form of prismatic bars, were submitted to cyclic three-point bend loading and the corresponding S-N curve was determined and then modeled according to Manson-Coffin type formulation. Fatigue data obtained using notched specimens showed a great deal of scatter and could not be modeled. © 2016 The Authors. Published by Elsevier B.V. Pe r-r view under responsibility of the Scientific Committee of ECF21. Keywords: natural fibers; bend tests; S-N curves; Manson-Coffin relationship 21st European Conference on Fracture, ECF21, 20-24 June 2016, Catania, Italy On the Fatigue Behavior of Bamboo Pulp Reinforced Cementitious Composites Eduardo F. Campello a , Marcos V. Pereira b,* , Fathi A. Darwish a , Khosrow Ghavami b a Fluminense Federal University, Depto of Civil Engineering, Passo da Pátria 156, Niterói – RJ, 24210-240, Brazil b Catholic University of Rio de Janeiro, Depto of Materials Engineering, Marquês de São Vicente 225, Rio de Janeiro – RJ, 22453-901, Brazil Abstract This work refers to an experimental study initiated with the purpose of evaluating the fatigue behavior of a cement base composite reinforced with bamboo pu p in the proportion of 6% of the weight of the dry cement. Specimens of the co posite, in the form of prismatic bars, were submitted to cyclic three-point bend loading and the corr sponding S-N curve was determined and then modeled according to Manson-Coffin type fo mulat on. Fatigue ata obtain d using notched spe imens showed a gr at deal of scatter an could not be modeled. © 2016 The Authors. Published by Elsevier B.V. Peer-review under espons bility of the Scientific Committee of ECF21. Keywords: natural fibers; bend tests; S-N curves; Manson-Coffin relationship Nomenclature b fatigue resistance exponent Copyright © 2016 The Authors. Published by Elsevier B.V. This is an open access article under the CC BY-NC-ND license (http://creativecommons.org/licenses/by-nc-nd/4.0/). Peer-review under responsibility of the Scientific Committee of ECF21.

Nomenclature b B

fatigue resistance exponent specimen thickn ss

© 2016 The Authors. Published by Elsevier B.V. Peer-review under responsibility of the Scientific Committee of PCF 2016. specimen thickness loading span L load ng span σ f ’ fatig e r sistance coefficient B L

σ f ’ σ m σ u m u

fatigue resistance coefficient mean st s

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

ultimate strength

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* Corresponding author. Tel.: +351 218419991. E-mail address: amd@tecnico.ulisboa.pt 2452-3216 © 2016 The Authors. Published by Elsevier B.V. Peer-review under responsibility of the Scientific Committee of ECF21. 2452-3216 © 2016 The Authors. Published by Elsevier B.V. Peer review under r sponsibility of the Scientific Committee of ECF21. * Corresponding author. Tel.: +55-21-35271149; fax: +55-21-35271236. E-mail address: marcospe@puc-rio.br * Corresponding author. Tel.: +55-21-35271149; fax: +55-21-35271236. E-mail ad ress: marcospe@puc rio.br

2452-3216 © 2016 The Authors. Published by Elsevier B.V. Peer-review under responsibility of the Scientific Committee of PCF 2016. Copyright © 2016 The Authors. Published by Elsevier B.V. This is an open access article under the CC BY-NC-ND license ( http://creativecommons.org/licenses/by-nc-nd/4.0/ ). Peer review under responsibility of the Scientific Committee of ECF21. 10.1016/j.prostr.2016.06.366