PSI - Issue 8

ScienceDirect Available online at www.sciencedirect.com Av ilable o line at www.sciencedire t.com Sci ceDirect Structural Integrity Procedia 00 (2016) 000 – 000 Procedia Structu al Integrity 8 (2018) 594–603 Available online at www.sciencedirect.com ScienceDirect Structural Integrity Procedia 00 (2017) 000 – 000 Available online at www.sciencedirect.com ScienceDirect Structural Integrity Procedia 00 (2017) 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. AIAS 2017 International Conference on Stress Analysis, AIAS 2017, 6 – 9 September 2017, Pisa, Italy Structural analysis of a mobile device for the End – of – Life treatment of photovoltaic panels Alessandro Grassi a , Massimo Delogu a *, Niccolò Baldanzini a , Lorenzo Berzi a , Marco Pierini a a Department of Industrial Engineering, University Of Florence, Via di S.Marta 3, 50139 Firenze, Italy Abstract The use of photovoltaic panels in Europe led to the installation of about 100GWp in the last decade, an amount which is still growing. The productive life of panels is expected to be between 10 to 30 years, so that in the future a strong demand for systems able to perform their End – of – Life treatment is undoubted. As a consequence of the Directive 2012/19/EU, the decommissioning of photovoltaic plants has to be performed in order to achieve challenging material recycling and recovery targets. Small size, mobile treatment plants have been proposed to reduce the investment needed for their installation in comparison with large industrial ones. A prototype system for the treatment of photovoltaic panels is presented; it is design d to be transported within the limits f ordinary freig t trans ort vehicles. All the systems included in the plant have been orga iz d in a p oduction line ounted in thre containers. Due to functional reasons, the containers have been design and built specifically for thes use, providing the necessa y integration between the installed machinery and of auxiliary systems su h as dust collection system, sound insulation and vibration absorbers. F r the v ification of resistance and stiffn ss of the system – which diff s from r gular freight contain rs – an adaptatio of suit ble standards is roposed. After the definition of appropriate lo ds for the case study, th structures of t containers re analyzed using Fi ite Elements s ftware. The analy is shows that due to the characteristics of the applic tion the structure is not suitable for g neral containers use, but – considering the limitations of the application in terms of transportation needs – the results can be considered acceptable. © 2017 The Authors. Published by Elsevier B.V. Peer-review under responsibility of the Scientific Committee of AIAS 2017 International Conference on Stress Analysis. AIAS 2017 International Conference on Stress Analysis, AIAS 2017, 6 – 9 September 2017, Pisa, Italy Structural analysis of a mobile device for the End – of – Life treatment of photovoltaic panels Alessandro Grassi a , Massimo Delogu a *, Niccolò Baldanzini a , Lorenzo Berzi a , Marco Pierini a a Department of Industrial Engineering, University Of Florence, Via di S.Marta 3, 50139 Firenze, Italy Abstract The use of phot voltaic panels in Europ led o the installatio of about 100GWp in the last decade, an amount which i still growing. The productive life of panels is xpected t e between 10 to 30 years, so that in th future a strong demand for systems able t perform their End – of – Life t eat nt is undoubted. As a ons que ce of the Directive 2012/19/EU, the decommissioning of pho ovoltaic plants has to be performed in rd r to ac ieve chall gi g material recycling and recovery targets. Small size, mobile treatment plants have been proposed to reduce the investment needed for their installation in comparison with large industrial on s. A prototype system for he treatment of photovolta c pan ls is pr sented; it is d signed to be transp rted with the limits of or inary freight transp rt vehicles. All the systems included in th plant ave been organized in a production lin mounted in thre containers. Due to unctiona r sons, the containers have been design and built specifically for these use, providing the necessary ntegrati n be ween h installed machinery and of uxiliary systems such as dust collecti n sys em, sound insulati n and vibrati n absorbers. F r the verification of resistanc and stiffn ss of th system – which differs from regular freig t contain rs – an adap ation of suitabl st ndards s proposed. A ter the efinition of appropriat loads or the ase study, stru tures of the con ainers are analyz d using Fin te El m nts oftwar . The analysis shows that due to the char cteristics of the application th structure s not suit ble for gen al containers use, but – considering limitations of the application in te m of transportation needs – the r sults can b considered acceptable. © 2017 The Autho s. Publ shed by Elsevier B.V. Peer-review under responsibility of the Scientific Com ittee of AIAS 2017 International Conference on Stress Analysis. © 2016 The Authors. Published by Elsevier B.V. Peer-review under responsibility of the Scientific Committee of PCF 2016. Copyright © 2018 The Authors. Published by Elsevier B.V. Peer-review under responsibility of the Scientific Committee of AIAS 2017 International Conference on Stress Analysis

Keywords: High Pressure Turbine Blade; Creep; Finite Element Method; 3D Model; Simulation. Keywords: Photovoltaics; WEEE; EOL; Container; Stiffness; Resistance; FEM. Keywords: Photovoltaic ; WEEE; EOL; Container; Stiffness; R sistance; FEM.

* Corresponding author. Tel.: +39 055 275 8733. E-mail address: massimo.delogu@unifi.it * Correspon ing author. Tel.: +39 055 275 8733. E-mail address: massimo.delogu@unifi.it

2452-3216 © 2017 The Authors. Published by Elsevier B.V. Peer-review under responsibility of the Scientific Committee of AIAS 2017 International Conference on Stress Analysis. 2452 3216 © 2017 Th Authors. Published by Elsevier B.V. Peer-review under responsibility of the Scientific Committee of AIAS 2017 International 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 Copyright  2018 The Authors. Published by Elsevier B.V. Peer-review under responsibility of the Scientific Committee of AIAS 2017 International Conference on Stress Analysis 10.1016/j.prostr.2017.12.058