PSI - Issue 10

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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 Mechanical properties of 3D printed polymer specimens V.D. Sagias a,b, *, K.I. Giannakopoulos a , C. Stergiou a,b a University of West Attica, Department of Mechanical Engineering, Athens 12244, Greece b Kingston University London, Faculty of Science Engineering & Computing, London, UK Abstract The procedure of manufacturing objects by sequentially depositin layers of material, based on 3D digital models, is called Additive Manufacturing (AM) or 3D-printing. Fused Deposition Modeling (FDM) technology along with the ABS (Acrylonitrile Butadiene Styrene) material are widely used in additive manufacturing. Until today, the mechanical properties of the AM parts cannot be determined nor even approximated before it is manufactured and tested. In this work a novel approach is presented on how the printing factors influence the mechanical properties of the printed part in order to obtain how parts can be manufactured (printed) to achieve improved mechanical properties. The methodology is based on an experimental procedure through which the optimum ombination of manufacturing parameters and their values can be determined, in order to achieve the goal. The Taguchi methodology was selected as an optimization tool towards the goal of improving the part’s mechanical properties. he Authors. Published by Elsevier Ltd. This is an open access article under the CC BY-NC-ND license (http://creativec mmons.org/licenses/by-nc-nd/3.0/). Peer-revi w under responsibility of the scienti ic committee of the 1 st International Conference of the Greek Society of Experimental Mechanics of Materials Keywords: Addi ive manufacturing; AM; 3D printing; ABS; mechani l properties; tensile testing 1. Introduction Additive Manufacturing (AM) evolves rapidly nowadays, as the research community continuously presents new achievements on materials (Ngo, et al., 2018), ethodologies (Papacharalampopoulos et al. (2018)), mechanical properties of AM parts (Raj et al. (2018); Dizon, et al. (2018)) or even try to analyse future perspectives (Camacho et al. (2018); Rejeski et al. (2018); Jiang et al. (2017)). 1 st I ter ati al fere ce f t e ree ciet f eri e tal ec a ics f aterials i l ti f 3D printed polymer specimens V.D. Sagias a,b, *, K.I. Giannakop l s a , . t r i a,b a University of West Attica, Department of Mechanical Engineering, Athens 12244, reece b Kingston niversity London, Faculty of Science Engineering Co puting, London, UK bstract The procedure of manufacturing objects by sequentially depositing layers of material, based on 3D digital models, is called Additive Manufacturing (AM) or 3D-printing. Fused Deposition Modeling (FDM) technology along with the ABS (Acrylonitrile utadiene Styr ne) aterial are idely used i additive anufacturing. ntil today, the echanical properties of the parts cannot be deter ined nor even approxi ated before it is anufac red and tested. In this ork a novel approach is presented on ho the printing factors influence the echanical properties of the printed part in order to obtain ho parts can be anufactured (printed) to achieve i proved echanical properties. The ethodology is based on an experi ental procedure through hich the opti u co bination of anufacturing para eters and their values can be deter ined, in order to achieve the goal. The Taguchi ethodology as selected as an opti ization tool to ards the goal of i proving the part’s echanical properties. 2018 The uthors. Published by Els vier Ltd. This is an open access article under the Y-NC-N license (http://creativeco ons.org/licenses/by-nc-nd/3.0/). Peer-review under responsibility of the scientific committee of the 1 st International onference of the reek Society of Experi ental echanics of aterials Keywords: dditive anufacturing; ; 3 printing; BS; echanical properties; tensile testing 1. Introduction dditive anufacturing ( ) evolves rapidly no adays, as the research co unity continuously presents ne achi ve ents on aterials ( go, et al., 2018), ethod logies (Papacharala popoulos et al. (2018)), echanical properties of parts ( aj et al. (2018); izon, et al. (2018)) or even try to analyse future perspectives ( a acho et al. (2018); ejeski et al. (2018); Jiang et al. (2017)). © 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.: +30 210 5381298 E-mail address: sagias@puas.gr Received: May 30, 2018; Received in revised form: July 25, 2018; Accepted: August 02, 2018 * Corresponding author. Tel.: +30 210 5381298 E- ail address: sagias puas.gr Received: ay 30, 2018; Received in revised for : July 25, 2018; Accepted: ugust 02, 2018

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.2018.09.013 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 2452- 3216 2018 The uthors. Published by Elsevier Ltd. This is an open access article under the - - license (http://creativeco ons.org/licenses/by-nc-nd/3.0/). Peer-review under responsibility of the scientific co ittee of the 1 st International onference of the reek Society of Experi ental echanics of aterials * Corresponding author. Tel.: +351 218419991. E-mail address: amd@tecnico.ulisboa.pt