PSI - Issue 8

ScienceDirect Available online at www.sciencedirect.com Av ilable o line at www.sciencedire t.com ScienceDirect Structural Integrity Procedia 00 (2016) 000 – 000 Procedia Structu al Integrity 8 (2018) 526–538 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 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 Implementation of eco-sustainable biocomposite materials reinforced by optimized agave fibers Antonio Mancino a , Giuseppe Marannano a , Bernardo Zuccarello a * a University of Palermo, Dipartimento dell'Innovazione Industriale e Digitale (DIID),Viale delle Scienze, 90128 Palermo, Italy Abstract Although several works have recently been published in literature about biocomposites, i.e. about composites with polymeric matrix reinforced by natural fibers, only a few articles have been devoted to the implementation of high performance biocomposites for structural and semi-structural applications. The present study aims to give a contribution by considering biocomposites obtained by using an eco-friendly partially bio-based epoxy (green epoxy) and sisal (agave sisalana fibers) obtained by a proper optimization process. Through a systematic experimental analysis, three different types of biocomposites obtained with a suitable manufacturing process, such as random short fiber biocomposites, random discontinuous fibers biocomposite obtained through the preliminary manufacture of MAT fabrics, and unidirectional long fibers biocomposites obtained through the preliminary manufacture of unidirectional “stitched” fabrics, have been studied. © 2017 The Authors. Published by Elsevier B.V. Peer-review und r responsibility of the Scientific Committee of AIAS 2017 Internat onal Conference o Stress Analysis. Keywords: biocomposites; natural fib s; agave fibers; eco-friendly matrices. AIAS 2017 International Conference on Stress Analysis, AIAS 2017, 6-9 September 2017, Pisa, Italy Impl mentation of e o-sustainable biocomposite materials reinforced by optimized agave fibers Antonio Mancino a , Giuseppe Marannano a , Bernardo Zuccarello a * a University of Palermo, Dipartimento dell'Innovazione Industriale e Digitale (DIID),Viale delle Scienze, 90128 Palermo, Italy Abstract Although several works have rec ntly been published in liter ture about bi composit s, i.e. about comp sites with p ly eric matrix reinforced by natural fibers, only a few art les have been devote to the implementation of high performance for structural and semi-structural a plic tions. The present study aims to give a contribution by considering biocomposites btained by using an co-friendly partially bio-based epoxy (green epoxy) and sisal (agave sisalana fibers) obtained by a proper optimizatio process. Through a systematic experimental analysis, three different types of biocomposites obta ned with a suitable manufacturing process, such as random short fiber biocomp sites, random disc ntinuous fibers b ocomposite obtained through the preliminary manufa ture of MAT fabrics, and unidirec ional long fibers biocomposites obtained through the preliminary manufacture of unidirectional “stitched” fabrics, have been studied. © 2017 The Autho s. Publ shed by Elsevier B.V. Peer-review under responsibility of the Scientific Committee of AIAS 2017 Inter ational C nferenc on Stre s Analysis. Keywo ds: biocomposites; nat ral fib s; agave fibers; eco-friendly matric s. © 2016 The Authors. Published by Elsevier B.V. Peer-review under responsibility of the Scientific Committee of PCF 2016. Biocomposites reinforced with agave fibers are eco-compatible or renewable materials already used in the automotive field and in other field of the industrial production, limited to non-structural applications (filling 1. Introduction Biocomposites reinforced with agave fibers are eco-compatible or renewable materials already used in the automotive field and in other field of the industrial production, limited to non-structural applications (filling Keywords: High Pressure Turbine Blade; Creep; Finite Element Method; 3D Model; Simulation. 1. Introduction

* Corresponding author. Tel.: +39-091-23897286 E-mail address: bernardo.zuccarello@unipa.it * Correspon ing author. Tel.: +39-091-23897286 E-mail address: bernardo.zuccarello@unipa.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.2017.12.052