PSI - Issue 13

ScienceDirect Available online at www.sciencedirect.com Available o line at ww.sciencedire t.com Scie ceDirect Structural Integrity Procedia 00 (2016) 000 – 000 Procedia Structural Integrity 13 (2018) 2132–2136 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. ECF22 - Loading and Environmental effects on Structural Integrity Influence of pyrolysis parameters on the efficiency of the biochar as na oparticles into cement-based composites Isabella Cosentino a , Luciana Restuccia a , Giuseppe Andrea Ferro a *, Jean-Marc Tulliani b a DISEG-Politecnico di Torino, C.so Duca degli Abruzzi 24, Turin 10129, Italy b DISAT-Politecnico di Torino, C.so Duca degli Abruzzi 24, Turin 10129, Italy Abstract In this research, a particular kind of biochar provided by UK Bioch r Centre has been added as nanoparticles into cementitious composites. Its principle characteristic lies in the standardizati n of its process production, th t makes it suitable to been used as filler in cement-matrix composites, ensuring the reproducibility of the cement mix (I. Cosentino “The use of Bio-char for sustainable and durable concrete”, 2017). The pyrolysis parameters and the content of carbon in the standardized biochar influenced its efficiency to enhance the mechanical properties of the cement composites: the results, in terms of flexural strength and fracture energy, have been worse than those obtained in previous studies (L. Restuccia “Re-think, Re-use: agro-food and C&D waste for high-performance sustainable cementitious composites”, 2016), in which particles have been produced with higher temperature. However, also with standardized biochar a general enhancement of mechanical properties has been recorded, a sign that they can be used to create new green buildi g materials. © 2018 The Authors. Published by Elsevier B.V. Peer-revi w under responsibility of th ECF22 organiz rs. Keywords: py olysi; biochar; cement-b sed composites; arbon nanop rticles; mechanical properties; flexural strength; fractu e ene gy; 1. Introduction The use of green concrete is spreading through partial substitution of raw materials and partial replacement of clinker with alternative constituents such us fly ashes, blast-furnace slag, silica fume (Supplementary Cementitious Materials, SCMs) or Calcium Sulfoaluminate Cement, Magnesium Oxide based Cement, Geopolymers, CO 2 -cured cement (Alternative Cementitious Mat rials, ACMs). © 2018 The Authors. Published by Elsevier B.V. Peer-review under responsibility of the ECF22 organizers. ECF22 - Loading and Environmental effects on Structural Integrity Influence of pyrolysis parameters on the efficiency of the biochar as nanoparticles into cement-based composites Isabella Cosentino a , Luciana Restuccia a , Giuseppe Andrea Ferro a *, Jean-Marc Tulliani b a DISEG-Politecnico di Tori o, C.s Duc degli Abruzzi 24, Turin 10129, Italy b AT Abstract In this research, a particular kind of biochar provided by UK Biochar Centre has been added as nanoparticles into cementitious composites. Its principle characteristic lies in the standardization of its process production, that makes it suitable t b en used a filler in cement-matrix composite , ensuri g the repro ucibility of the ment mix (I. Cosentino “The use of Bio-char for sustainabl and dur ble concrete”, 2017). The pyrolysis parameters and t content of carbon in the standardized biochar influenced its efficiency to enhance the mechanical properties of the cement composites: the results, in terms of flexural strength and fracture energy, have be worse than those obtained in previous studies (L. Re tuccia “R -think, R -use: agro-food and C&D waste for high-performance sustainable cem ntitious com osites”, 2016), in which particles have been produced with higher temperature. However, also with stand rdized biochar a general enhancement of me anical properties has been recorded, a sign that they can be used to create new green building m terials. © 2018 The Aut ors. Published by Elsevier B.V. Peer-review under responsibility of the ECF22 organizers. Keywords: pyrolysi; biochar; cement-bas d composites; arbon nanoparticles; m chanical properties; flexural strength; fractu energy; 1. Introduction The use of green concrete is spreading through partial substitution of raw materials and partial replacement of clinker wit alternative constituents such us fly ashes, blast-furnace slag, silica fume (Supplementary Cementitious Mat ials, SCMs) or Calcium Sulfoaluminate Ce en , Magnesium Oxide based Cement, Geopolymers, CO 2 -cured cement (Alternative Cementitious Materials, A Ms). © 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 0110904885; E-mail address: ferro@polito.it * Corresponding author. Tel.: +39 0110904885; E-mail address: ferro@polito.it

* Corresponding author. Tel.: +351 218419991. E-mail address: amd@tecnico.ulisboa.pt 2452-3216 © 2018 The Authors. Published by Elsevier B.V. Peer-review under responsibility of the ECF22 organizers. 2452-3216 © 2018 The Authors. Published by Elsevier B.V. Peer review under r sponsibility of the ECF22 o ganizers.

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 B.V. Peer-review under responsibility of the ECF22 organizers. 10.1016/j.prostr.2018.12.194