PSI - Issue 12

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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 B.V. 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 AIAS 2018 International Conference on Stress Analysis. AIAS 2018 International Conference on Stress Analysis Working Cycle requirements for an electrified architecture of a vertical feed mixer vehicle Francesco Mocera a, ∗ , Aurelio Soma` a a Department of Mechanical and Aerospace Engineering (DIMEAS) Politecnico di Torino, Corso Duca degli Abruzzi 24, Torino 10129, Italy Abstract In the last years, the need for lower pollutant emissions has become one of the most discussed topic worldwide. Governments establish stricter regulations almost yearly in order to push the industry towards more e ffi cient machines or, at least, lower harmful gas emissions. Agriculture is experiencing the same trend with strict regulations which force manufacturers to the massive use of diesel engine exhaust after-treatment systems. At the same time, industries are considering other options that can satisfy regulations and also add functionalities to their products. This research wants to show the results of the study which led to the first electric prototype of a self-propelled vertical feed mixer. A methodological approach in collaboration with an Italian feed mixer wagons manufacturer, allowed to characterize the traditional machine in all its working conditions leading to the necessary requirements for the design of the final electric architecture. © 2018 The Authors. Publishe by Elsevier B.V. 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 AIAS 2018 International Conference on Stress Analysis. Keywords: NRMM; Electrified architectures; Syste desig ; Vertic l feed mixer. 1. Introduction The need for lower pollutant emissions and increase of fossil fuels independent technologies has pushed the au tomotive field research and development activities of the last three decades (Chan, 2002). Results of this trend are more e ffi cient Internal Combustion Engines (ICE) and the birth of innovative hybrid and electric architectures, now available on the market. Vehicles equipped with these technologies show good performance, preserving their func tionalities but with lower impact on pollutant emissions (Emadi, 2003). In the meantime, also Non Road Mobile Machineries (NRMMs) started to be regulated with severe regulations on their emissions (European Commission, 2016). This category includes several kind of self-propelled working machines, es pecially involved in o ff -road applications. This label is often used to address the following groups of machines: AIAS 2018 International Conference on Stress Analysis orking ycle require ents for an electrified architecture of a verti al feed ixer vehicle Francesco Mocera a, ∗ , Aurelio Soma` a a Department of Mechanical and Aerospace Engineering (DIMEAS) Politecnico di Torino, Corso Duca degli Abruzzi 24, Torino 10129, Italy Abstract In the last years, the need for lower pollutant emissions has become one of the most discussed topic worldwide. Governments establish stricter regulations almost yearly in order to push the industry towards more e ffi cient machines or, at least, lower harmful gas emissions. Agricul ure is experiencing the same trend with strict regulations which force manufacturers to the massive use f diesel engine exhaust after-treatment systems. At the same time, ind stries are considering other options that can satisfy regulations and also add functionalities to their products. This research wants to show the results of the study which led to the first electric prototype of a self-propelled vertical feed mixer. A methodological approach in collaboration with an Italian feed mixer wagons manufacturer, allowed to characterize the traditional machine in all its working conditions leading to the necessary requirements for the design of the final electric architecture. 2018 The Authors. Published by Elsevier B.V. is is an open access article under the CC BY-NC-ND license (http: // creativecommons.org / licenses / by-nc-nd / 3.0 / ) er-review unde responsibility of the Scientific Committee of AIAS 2018 International Co ference on Stress Analysis. Keywords: NRMM; Electrified architectures; System design; Vertical feed mixer. 1. Introduction The need for lower pollutant emissions and increase of fossil fuels independent technologies has pushed the au tomotive field research and development activities of the last three decades (Chan, 2002). Results of this trend are more e ffi cient Internal Combustion Engines (ICE) and the birth of innovative hybrid and electric architectures, now available on the market. Vehicles equipped with these technologies show good performance, preserving their func tionalities but with lower impact on pollutant emissions (Emadi, 2003). In the meantime, also Non Road Mobile Machineries (NRMMs) started to be regulated with severe regulations on their emissions (European Commission, 2016). This category includes several kind of self-propelled working machines, es pecially involved in o ff -road applications. This label is often used to address the following groups of machines: © 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.

• green maintenance machines; • green maintenance machines;

* Corresponding author. Tel.: +351 218419991. E-mail address: amd@tecnico.ulisboa.pt ∗ Corresponding author. Tel.: + 39-011-090-6897. E-mail address: francesco.mocera@polito.it ∗ Corresponding author. Tel.: + 39-011-090-6897. E-mail address: francesco.mocera@polito.it

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. 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 AIAS 2018 International Conference on Stress Analysis. 10.1016/j.prostr.2018.11.093 2210-7843 © 2018 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 / 3.0 / ) Peer-review under responsibility of the Scientific Committee of AIAS 2018 International Conference on Stress Analysis. 2210-7843 © 2018 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 / 3.0 / ) Peer-review under responsibility of the Scientific Committee of AIAS 2018 International Conference on Stress Analysis.