PSI - Issue 11

ScienceDirect Available online at www.sciencedirect.com Av ilable o line at ww.sciencedire t.com ScienceDirect Structural Integrity Procedia 00 (2016) 000 – 000 Procedi Structural Integrity 11 8 36–43 Available online at www.sciencedirect.com ScienceDirect Structural Int grity Procedia 00 (2018) 000 – 000 Available online at www.sciencedirect.com ScienceDirect Structural Integrity 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. Copyright © 2018 Elsevier B.V. All rights reserved. Peer-review under responsibility of the CINPAR 2018 organizers XIV International Conference on Building Pathology and Constructions Repair - CINPAR 2018 Natural zeolite, a pozzolan for structural concrete Bárbara Belén Raggiotti a* , María Josefina Positieri a , Ángel Oshiro a a CINTEMAC, Universidad Tenologia Nacional – Facultad Regional Córdoba, Maestro M. López esq Cruz Roja Argentina, Ciudad Universitaria, Córdoba (X5016ZAA), Argentina Abstract Of building materials, concrete is currently one of the most widely used on account of its low cost, appropriate mechanical features and its durability, as well as the ease with which it can adopt different shapes and sizes (Najimi et al., 2012). Because of the importance of the use of concrete as a structural material and its impact on the environment as a consumer of large quantities of natural resourc s nd as a CO 2 em tter i th ceme t ndustry, it is necessary to develop mixtures from the science of material t accompany the growth of construction while considering and taking measures to care for the environment, that is, to develop energetically efficient materials. This article presents the use of a natural zeolite, a material with potential pozzolanic activity, to partially replace Portland cement in different percentages in structural concrete. The physico-chemical characterization of the zeolite material is presented with the results of resistance and durability of concrete to which this addition has been incorporated. Copyright © 2018 Elsevier B.V. All rights reserved. Peer-review under responsibility of the CINPAR 2018 organizers Keywords: zeolite; concrete; pozzolan; durability. 1. Introduction Active mineral admixtures have been used throughout the history of concrete, seeking different purposes, to cover economic, ecological and technological functions. Economic because they reduce the use of cement, the production of which consumes high amounts of energy. Ecological because by replacing part of the cement, CO 2 emissions are XIV International Conference on Building Pathology and Constructions Repair - CINPAR 2018 Natural zeolite, a pozzolan for structural concrete Bárbara Belén Raggiotti a* , María Josefina Positieri a , Ángel Oshiro a a CINTEMAC, Universidad Tenologia Nacional – F cultad Regional Córdoba, Maestro M. López esq Cruz Roja Argentina, Ciudad Universitaria, Córdoba (X5016ZAA), Argentina Abstract Of building materials, concrete is currently one of the most widely used on account of its low cost, appropriate mechanical features and its durability, as well as the ease with which it can adopt different shapes and sizes (Najimi et al., 2012). Because of the importance of the use of concrete as a structural material and its impact on the environment as a consumer of large quantities of natural resources and as a CO 2 emitter in the cement industry, it is necessary to develop mixtures from the science of materials to accompany the growth of construction while considering and taking measures to care for the environment, that is, to develop energetically efficient materials. This article res ts the use of a natural zeolite, a material with potential pozzolanic activity, to partially replace Portland cement in different percentages in structural concrete. The physico-chemical characterization of the zeolite material is presented with the results of resistance and durability of concrete to which this addition has een incorporated. Copyright © 2018 Elsevier B.V. All rights reserved. Peer-review under responsibility of the CINPAR 2018 organizers Keywords: zeolite; concrete; pozzolan; durability. 1. Introduction Active mineral admixtures have b en used throughout the history of concrete, seeking different purposes, to cover economic, ecological and techn logical functions. Economic because they reduce the use of cement, the production of which consumes high amounts of energy. Ecological because by replacing part of the cement, CO 2 emissions are © 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. Tel.: +54-3525-482382. E-mail address: belenraggiotti@gmail.com * Correspon ing author. Tel.: +54-3525-482382. E-mail address: belenraggiotti@gmail.com

* Corresponding author. Tel.: +351 218419991. E-mail address: amd@tecnico.ulisboa.pt 2452-3216 Copyright © 2018 Elsevier B.V. ll rights reserved. Peer-revi w u er responsibility of the CINPAR 2018 organizers. 2452-3216 Copyright © 2018 Elsevier B.V. All rights reserved. Peer-review under responsibility of the CINPAR 2018 organizers.

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 Elsevier B.V. All rights reserved. Peer-review under responsibility of the CINPAR 2018 organizers 10.1016/j.prostr.2018.11.006