PSI - Issue 1

ScienceDirect Procedia Structural Integrity 1 (2016) 082–089 Available online at www.sciencedirect.com Available online at www.sciencedire t.com Sci ceDirect Structural Integ ity Procedia 00 (2016) 00 – 000 Available online at www.sciencedirect.com ScienceDirect Structural Integrity Procedia 00 (2016) 000 – 000 Available online at www.sciencedirect.com ScienceDirect Structural Integrity Procedia 00 (2016) 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. XV Portuguese Conference on Fracture, PCF 2016, 10-12 February 2016, Paço de Arcos, Portugal Mechanical behavior of basalt fibers in a basalt-UP composite B. Soares*, R. Preto, L.Sousa a , L. Reis a a Instituto de Engenharia Mecânica (IdMEC) Instituto Superior Técnico, Universidade de Lisboa, Av. Rovisco Pais 1, 1049-001 Lis on, Portugal Abstract With the increasing interest in sustainable solutions in material desi n in the last decade, research on natural materials (animal, vegetal or mineral) has increased at a rapid pace. Of these materials, Basalt Fibers for composite construction provide an interesting set of mechanical properties, equal or above to those of Glass Fibers, with advantages in terms of cost effectiveness and production to vegetable based Natural Fibers. Basalt fibers offer some advantages versus current materials, it is fireproof, requires no material addition, has better mechanical properties than most types of E-Glass, and it is cheaper than Carbon Fiber. This paper studies the mechanical properties of a Basalt Fiber composite in an Unsaturated Polyester matrix produced by Resin Transfe Molding (RTM), with the composites subjected to tensile, compression, shear and flexural tests. The results aligned with the predicted values by using the mixing rule, albeit with a high coefficient of variation, which microscopic analysis confirmed to arise from production issues with RTM. © 2016 The Authors. Published by Elsevier B.V. Peer-review under responsibility of the Scientific Committee of PCF 2016. Keywords: Composites, Basalt fibers, Mechanical properties , Unsaturated Polyesther XV Portuguese Conference on Fracture, PCF 2016, 10-12 February 2016, Paço de Arcos, Portugal Mechanical behavior of basalt fibers in a basalt-UP composite B. Soares*, R. Preto, L.Sousa a , L. Reis a a Instituto de Engenharia Mecânica (IdMEC) Instituto Superior Técnico, Universidade de Lisboa, Av. Rovisco Pais 1, 1049-001 Lisbon, Portugal Abstract With the increasing interest in ustainable solutions in mat rial design in the last decade, esearch on natural materials (anim l, vegetal or mineral) has ncreased at a rapid pace. Of these material , Basalt Fibers for composite construction provide an i teresting set of mechanical properties, equal o above to those Glass Fibers, with advantages in ter s of cost effectiveness and production to vegetable based Natural Fibers. Basalt fibers offer some advantages versus current materials, it is fireproof, requires no material addition, has better m chanical properti s than most types of E-Gl ss, and it is che per than Carbon Fiber. his paper studies the mechanical properties of a Basalt Fib r comp site in a Uns turated Polyes r matrix produced by Resin Transfer Molding (RTM), with the composites subjected to tensile, compression, shear and flexural tests. The results aligned wi h the predicted values by using the mixing rule, albeit with a high coefficient of variation, which microscopic analysis confirmed t arise from production issues with RTM. © 2016 The Autho s. Publ shed by Elsevier B.V. Peer-review under responsibility of the Scientific Committee of PCF 2016. Keywords: Composites, Basalt fibers, Mechanical properties , Unsaturated Polyesther Copyright © 2015 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/4.0/). Peer-review under responsibility of the Scientific Committee of PCF 2016. © 2016 The Authors. Published by Elsevier B.V. Peer-review under responsibility of the Scientific Committee of PCF 2016. Composites mad with f bers such as carbon fibers, glass fibers or aramid fibers and resins such as epoxy have very good properties when designed correctly, although there is one unavoidable problem with such composites Composites mad ith fib rs such as carbon fibers, glass fibers or aramid fi ers and r sins such as epoxy have very good properties when designed correctly, although there is one unavoidable problem with such composites Keywords: High Pressure Turbine Blade; Creep; Finite Element Method; 3D Model; Simulation. 1. Introduction 1. Introduction

* Corresponding author. Tel.: +351 218419991. E-mail address: amd@tecnico.ulisboa.pt 2452-3216 © 2016 Th Authors. Published by Elsevier B.V. Peer-review under responsibility of the Scientific Committee of PCF 2016. 2452-3216 © 2016 The Authors. Published by Elsevier B.V. Peer-review under responsibility of the Scientific Committee of PCF 2016. * Corresponding author. Tel.: +351 962 930 535 E-mail address: bruno.soares@ist.utl.pt; luis.g.reis@tecnico.ulisboa.pt * Corresponding author. Tel.: +351 962 930 535 E-mail address: bruno.soares@ist.utl.pt; luis.g.reis@tecnico.ulisboa.pt

2452-3216 © 2016 The Authors. Published by Elsevier B.V. Peer-review under responsibility of the Scientific Committee of PCF 2016. Copyright © 2015 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/4.0/ ). Peer review under responsibility of the Scientific Committee of PCF 2016. 10.1016/j.prostr.2016.02.012