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) 332–344 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. Copyright © 2018 The Authors. Published by Elsevi r B.V. Peer-review und r responsibility of the Scientific Committee of AIAS 2017 Internat onal Conference Stress Analysis AIAS 2017 International Conference on Stress Analysis, AIAS 2017, 6-9 September 2017, Pisa, Italy Aluminum honeycomb sandwich for protective structures of earth moving machines A. Bonanno a ; V. Crupi b ; G. Epasto b *; E. Guglielmino b ; G. Palomba b a Institute for Agricultural and Earthmoving Machines - IMAMOTER, C.N.R., via Canal Bianco 28, 44124 Ferrara, Italy b Department of Engineering, University of Messina, Contrada di Dio, Sant'Agata, 98166 Messina, Italy Abstract The design and the assembly of the vehicles subjected to the risk of crushing from falling objects have to consider such danger and provide the operators with suitable safety systems. Generally, falling object protective structures for earth moving machines consist of vertical elements, connected by transversal elements, covered by a roof. The latter has the aim to protect the operators from falling objects and it is usually made of a steel skeleton with a metal plate. In this study, sandwich panels were proposed as technical solution for the impact protection from falling objects in earth moving machines. A very light and cheap aluminum honeycomb core (AA3003 alloy and cell size = 19 mm) was considered as design solution and was subjected to static and dynamic full-scale tests. The results were analysed according to the performance requirements of ISO 3449 standard. The experimental results confirmed that the honeycomb structures are well suitable for designing absorber devices in vehicles protective structures in order to ensure occupant safety. © 2017 The Authors. Published by Elsevier B.V. Peer-review under responsibility of the Scientific Committee of AIAS 2017 International Conference on Stress Analysis. Keywords: Aluminum honeycomb; Lightweight design; Impact behaviour; Full scale tests; Crashworthiness; Earth moving machines. AIAS 2017 International Conference on Stress Analysis, AIAS 2017, 6-9 September 2017, Pisa, Italy Aluminum honey omb sandwich for protective structures of earth moving machines A. Bonanno a ; V. Crupi b ; G. Epasto b *; E. Guglielmino b ; G. Palomba b a Institute for Agricul ural and Earthmoving Machines - IMAMOTER, C.N.R., vi Canal Bianco 28, 44124 Ferrara, Italy b Department of Engineering, University of Messina, Contrada di Dio, Sant'Agata, 98166 Messina, Italy Abstract The design and the assembly of the v hicl s subjected to the risk of crushing from falling objects have to consider such dang r and provide the operators with suitable safety systems. Generally, falling object protective structures for earth moving machines consist of vertical elements, connected by transversal eleme ts, covered by a roof. The latter has the aim to protect the operator from falling objects and it is usually made of a steel skelet n with a metal plate. In this study, sandwich panels were roposed as techni al solution for the impact protection from falling objects in earth moving machines. A very light and cheap aluminum ho eycomb core (AA3003 alloy and ell size = 19 mm) was c nsidered as desig solution and was subjected to static and dynamic full-scale tests. Th results were analy ed a cording to the performance req irements of ISO 3449 standard. The experimental results confirmed that the honeycomb structures are well suitable for designing absorber devices in vehicles protective structures in order to ensure occupant safety. © 2017 The Authors. Published by Elsevier B.V. Peer-review under responsibility of the Scientific Committee of AIAS 2017 International Conference on Stress Analysis. Keywords: Aluminum honeycomb; Lightweight design; Impact behaviour; Full scale tests; Crashworthiness; Earth moving 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.

* Corresponding author. Gabriella Epasto, Department of Engineering, University of Messina, Contrada Di Dio, 98166 Messina, Italy Tel.: +3990377505; fax: +39903977464. E-mail address: gabriella.epasto@unime.it * Corresponding author. Gabriella Epasto, Department of Engineering, University of Messina, Contrada Di Dio, 98166 Messina, Italy Tel.: +3990377505; fax: +39903977464. E-mail address: gabriella.epasto@unime.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.2017.12.034