PSI - Issue 12

ScienceDirect Available online at www.sciencedirect.com Av ilable o line at ww.sciencedire t.com cienceDirect Structural Integrity Procedia 00 (2016) 000 – 000 Procedia Structu al Integrity 12 (2018) 113–121 Available online at www.sciencedirect.com ScienceDirect Structural Integrity Procedia 00 (2018) 000 – 000 Available online at www.sciencedirect.com ScienceDirect Structural Int grity 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. © 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 Fabrication of fluidic reactors by a customized 3D printing process Sandro Barone a , Marcello Braglia a , Roberto Gabbrielli a , Salvatore Miceli a , Paolo Neri a, * , Alessandr Paoli a , Armando Viviano Razionale a a University of Pisa. Department of Civil and Industrial Engineering, Mechanical Division. Largo L. Lazzarino 1, 56122 Pisa, Italy Abstract Microfluidic systems demonstrated to improve the analysis of biological and chemical processes by providing a more controlled fluid-handling enviro ment. Typically, microfluidic systems are created in monolithic f rm by means of microfabricati n techniques that constrain designers to work in a two-dimensional space. In this regard, Additive Manufacturing (AM) is a powerful set of technologies that can deal with the complexity of 3D structures producing flow paths with sections differing in size and direction. In this work, the use of a commercial laser-based stereolithography 3D printer has been firstly explored to fabricate transparent channels for flow reactors. A custom 3D printer, based on Digital Light Processing Stereolithography (DLP-SLA), has then been developed with the aim at gaining flexibility and overcoming typical limitations raised from standard commercial solutions. The effectiveness of the developed DLP-SLA 3D printer has been experienced by printing transparent fluidic devices with embedded channels with a specifically designed three-step printing process. © 2018 The Authors. Published by Elsevier B.V. This is an open access article under th CC BY-NC-ND license (http://creativecommons.org/licenses/by-nc-nd/3.0/) Peer-review und r responsibility of the Scie tific Committee of AIAS 2018 International Conference on Stress Analysis. Keywords: Additive m nuf cturing; fluidic reactor; laser-based stereolithograpy; DLP 3D printing The use of microfluidic reactors for flow chemistry in both academic research and industrial applications has considerably grown in the past two decades (Elvira et al., 2013; Waheed et al., 2016). Microfluidics deals with the manipulation and control of fluids geometrically confined into small channels, typically having millimetric scale. The AIAS 2018 International Conference on Stress Analysis Fabrication of fluidic reactors by a customized 3D printing process Sandro Barone a , Marcello Braglia a , Roberto Gabbrielli a , Salvatore Miceli a , Paolo Neri a, * , Alessandro Paoli a , Armando Viviano Razionale a a University of Pisa. Department of Civil and Industrial Engineering, Mechanical Division. Largo L. Lazzarino 1, 56122 Pisa, Italy Abstract Microfluidic systems demonstr ted to improve the analysis of biological and ch mical processes by providing a more controlled fluid-handling environment. Typically, microfluidic systems are created in monolithic form by means of icrofabrication techniques that constrain designers to work in a two-dimensional space. In this regard, Additive Manufacturing (AM) is a powerful set of technologies that can deal with the complexity of 3D structures producing flow paths with sections differing in size and direction. In this work, the use of a commercial laser-based stereolithography 3D printer has been firstly explored to fabricate transparent channels for flow reactors. A custom 3D printer, based on Digital Light Processing Stereolithography (DLP-SLA), has then been developed with the aim at gaining flexibility and overcoming typical limitations raised from standard commercial solutions. The effectiveness of the developed DLP-SLA 3D printer has been experienced by printing transparent fluidic devices with embedded channels with a specifically designed three-step printing process. © 2018 The Aut ors. Published by Elsevier B.V. This is an open access art le und r the CC BY-NC-ND license (http://crea ivecommons.org/lic nses/by-nc-nd/3.0/) Peer-review under responsibility of th Scientific ommittee of AIAS 2018 Int rnational Conference on Stress Analysis. Keywords: Additiv manufacturing; fluidic reactor; laser-based stereolithograpy; DLP 3D printing 1. Introduction The use of microfluidic reactors for flow chemistry in both academic research and industrial applications has considerably grown in the past two de ades (Elvira et al., 2013; Waheed et al., 2016). Microfluidics deals with the manipulation and control of fluids geometrically confined into small channels, typically having millimetric scale. The © 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. 1. Introduction

* Corresponding author. Tel.: +39-050 2218019; fax:+39-050 2218019. E-mail address: paolo.neri@dici.unipi.it * Corresponding author. Tel.: +39-050 2218019; fax:+39-050 2218019. E-mail address: paolo.neri@dici.unipi.it

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-revi w u er responsibility of the Scientific Committee of AIAS 2018 International Conference on Stress Analysis. 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 u der responsibility of t Scientific ommitt e of AIAS 2018 Internati al Conference on Stress Analysis.

* 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 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.2018.11.102