PSI - Issue 13

ScienceDirect Available online at www.sciencedirect.com Av ilable o line at ww.sciencedire t.com cienceDirect Structural Integrity Procedia 00 (2016) 000 – 000 Procedia Structural Integrity 13 (2018) 1745–175 Available online at www.sciencedirect.com ScienceDirect Structural Integrity Procedia 00 (2018) 000 – 000 Available online at www.sciencedirect.com ScienceDirect Structural Int grity 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. ECF22 - Loading and Environmental effects on Structural Integrity Decreasing bridge member´s resistance due to reinforcement corrosion Miroslav Strieška a, *, Peter Koteš a , Aleksandar Sedmak b a University of Žilina, Department of Structures and Bridges, Univerzitná 8215/1, 01026 Žilina, Slovakia b University of Belgrade, Faculty of Mechanical Engineering, Kraljice Marije 16, 11,000 Belgrade, Serbia The traffic infrastructure is very importa t for the economy, people and progress of the country. The infrastructure consists of numerous structures and their structural members like bridges, abutments, piers, rails, guard-rails etc. This constructions are very loaded by surrounding environment. Ag ressiveness of this nvironment is different in vari us areas in Slovak republic due to morphology of terrain, which causes the different corrosion depth in those areas. This corrosion depth can be calculated by standard ISO 9223, describing the calculation of the corrosion rate r corr for the first-year and the standard ISO 9224 describe the estimation of the corrosion rate D for the following years. The input parameters for these calculation are sulphur dioxide SO 2 , chloride ions Cl - , temperature T and relative humidity Rh measured by Slovak Hydrometeorological Institute (SHMÚ). The article is focused on the determining load-carrying capacity of reinforced concrete (RC) bridges changing in time due to corrosion of the reinforcement diameter. This information can be very useful not only for the design of the new bridge construction, but also for the estimation of the remaining lifetime of the existing structure. © 2018 The Authors. Published by Elsevier B.V. Peer-review und r responsibility of the ECF22 organizers. Keywords: Traffic infrastructure, bridge, environment, corrosion rate, reinforcement, concrete © 2018 The Authors. Published by Elsevier B.V. Peer-review under responsibility of the ECF22 organizers. ECF22 - Loading and Environmental effects on Structural Integrity Decreasing bridge member´s resistance due to reinforcement corrosion Miroslav Strieška a, *, Peter Koteš a , Aleksandar Sedmak b a University of Žilina, Department of Structures and Bridges, Univerzitná 8215/1, 01026 Žilina, Slovakia b niversity of Belgr de, F culty of Mechanical E gineering Kraljice Marije 16, 11, 00 Belgr de, Serbia Abstract The traffic infrastructure is very important for the economy, people and progress of the country. The infrastructure consists of numerous structures and their stru tural m mbers like bridges, abutments, iers, rails, guard-r ils etc. This constructions are very load d by surro nding environment. Aggressiveness of this envi onment is different in various areas in Sl vak republic due to morphology of terrai , which causes the different corrosion depth in those areas. This corrosion depth can be calculat d by standard ISO 9223, describing the calculation of the corrosi n rate r corr for the first-y r and the standar ISO 9224 describe the estimation of the corrosion rate D for the foll wing years. The input parameters for th se calculation are sulphur dioxide SO 2 , chloride ions Cl - , t mperature T and relativ humidity Rh measured by Slov k Hydrometeorological Institute (SHMÚ). The article is f cused on the d termining load-carrying capacity of reinforced concrete (RC) bridg s changing in time due to corrosion of the reinforcement diam t r. This information can be ver useful not only for the design of the new bridge constr cti n, but also for the stimation of the remaining lifetime of the existing struct re. © 2018 The Authors. Published by Elsevier B.V. Peer-review under responsibility of the ECF22 organizers. Keywords: Traffic infr s ructure, bridge, nvironm nt, corrosion rate, reinforcement, concrete All structures are subjected to the surrounding environment. Most of all, the structures like bridges, abutments, piers, vehicle parapets, expansion joints etc., which are built as a part of the traffic infrastructure, where the de-icing salts are applied (Krivy 2017, Göran 2001). Nowadays, the design of the new reinforced concrete (RC) structures is © 2016 The Authors. Published by Elsevier B.V. Peer-review under responsibility of the Scientific Committee of PCF 2016. All structures are subjected to the surrounding environment. Most of all, the structures like bridges, abutments, piers, vehicle parapets, expansion joints etc., which are built as a part of the traffic infrastructure, where the de-icing salts are applied (Krivy 2017, Göran 2001). Nowadays, the design of the new reinforced concrete (RC) structures is Keywords: High Pressure Turbine Blade; Creep; Finite Element Method; 3D Model; Simulation. Abstract 1. Introduction 1. Introduction

* Corresponding author. Tel.: +351 218419991. E-mail address: amd@tecnico.ulisboa.pt 2452-3216 © 2018 The Authors. Published by Elsevier B.V. Peer-review under responsibility of the ECF22 organizers. 2452-3216 © 2018 The Authors. Published by Elsevier B.V. Peer review under r sponsibility of the ECF22 organizers. * Corresponding author. Tel.: +421-41-513-5663; fax: +421-41-513-5690. E-mail address: miroslav.strieska@fstav.uniza.sk * Corresponding author. Tel.: +421-41-513-5663; fax: +421-41-513-5690. E-mail ad ress: mir slav.strieska@fstav.uniza.sk

2452-3216 © 2016 The Authors. Published by Elsevier B.V. Peer-review under responsibility of the Scientific Committee of PCF 2016.

2452-3216  2018 The Authors. Published by Elsevier B.V. Peer-review under responsibility of the ECF22 organizers. 10.1016/j.prostr.2018.12.366