PSI - Issue 13

ScienceDirect Available online at www.sciencedirect.com Av ilable o line at www.sciencedire t.com ienceDirect Structural Integrity Procedia 00 (2016) 000 – 000 Procedia Structural Integrity 13 (2018) 1689–1694 Available online at www.sciencedirect.com ScienceDirect Structural Integrity 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. ECF22 - Loading and Environmental effects on Structural Integrity Change of magnetic properties in austenitic stainless steels due to plastic deformation Tatiana Oršulová a * , Peter Palček a , Marek Roszak b , Milan Uhríčik a , Milan Smetana a , Jozef Kúdelčík a a Faculty of Mechanical Engineering & Faculty of Electrical Engineering, University of Žilina, 010 26 Žilina, Slovak republic b Institute of Engineering Materials and Biomaterials, Silesian University of Technology, Konarskiego 18a St, 44-100 Gliwice, Poland Austenitic stainless steels, investigated in this research, belong into a group of the so-called high-alloy TRIP (Transformation Induced Plasticity) steels. The nondestructive evaluation (NDE) methods were used for determination of plastic deformation influence in investigated materials. The NDE methods permit products to be inspected throughout their service life, to determine when to repair or replace a particular part. The main goal of this study was to measure and thus separate different levels of applied plastic deformation of selected conductive biomaterials. Two different devices were used to evaluate the effect of plastic deformation. The first device was commercially available magnetic field sensor GF708. The second device was Magnet Physik, on which is possible t determine magnetic qua tities (rema ence, coercivity), make measurements with surrounding coils t determine the magnetic mean values and measure at temperatures up to 200 °C. Both of thos devices are suitable for measuring the magne c pr p rties. Effect of plastic deformation was observ d by th light microscope, as well. © 2018 The Authors. Published by Elsevier B.V. Peer-review under responsibility of the ECF22 organizers. Keywords: nondestructive evaluation; magnetic properties; plastic deformation; austenitic stainless steels © 2018 The Authors. Published by Elsevier B.V. Peer-review under responsibility of the ECF22 organizers. ECF22 - Loading and Environmental effects on Structural Integrity Change of magnetic properties in austenitic stainless steels due to plastic deformation Tatiana Oršulová a * , Peter Palček a , Marek Roszak b , Milan Uhríčik a , Milan Smetana a , Jozef Kúdelčík a a Faculty of Mechanical Engineering & Faculty of Electric l Engineering, University of Žilina, 010 26 Žilina, Slovak republic b Institute of Engineeri g Materials and Biom terials, Si sian University of Tech ology, Konarskiego 18a St, 44-100 Gliwice, Poland Abstract Austenitic stainless steels, investigated in this research, belong into a group of the so-called high-alloy TRIP (Transformation Induced Plasticity) steels. The nond structive evaluation (NDE) methods were used for determination of plastic deformation i fl ence in investigated materials. The NDE m thods permit products to be inspect throughout their service life, to determine when to repair or replace particular part. Th main goal of this study was to measure and thus separate diff rent levels of applied plastic deformation of selected conductive biomaterials. Two different devic s were used to evaluate the eff ct of plastic deformation. Th first device was ommercially available m gnetic field sensor GF708. The s cond device was Magnet Physik, on which is possible to det rmine magnetic quantities (re anence, coercivity), make measurements with surroundi g coils to determine magnetic m an values and meas re at t ratur s up t 200 °C. Both of tho e device are suitable for measuring th magnetic properties. Effect of plastic deformation was observed by the light microscope, as well. © 2018 The Authors. Published by Elsevier B.V. Peer-review under responsibility of the ECF22 organizers. Keywords: nondestructive evaluation; magnetic properties; plastic deformation; austenitic stainless steels © 2016 The Authors. Published by Elsevier B.V. Peer-review under responsibility of the Scientific Committee of PCF 2016. External forces cause material deformation or deformation with a sufficiently powerful force that breaks through the fracture. Due to the influence of the external forces, the material creates a tension that is manifested by a certain arrangement of the mechanical stress (Jankura et al., 2008). Keywords: High Pressure Turbine Blade; Creep; Finite Element Method; 3D Model; Simulation. External forces cause material deformation or deformation with a sufficiently powerful force that breaks through the fracture. Due to the influ nce of the external forces, the material creates a tension that is manifested by a certain arrangement of the mechanical stress (Jankura et al., 2008). Abstract 1. Introduction 1. Introduction

* Corresponding author. Tel.: +421-41-513-2632. E-mail address: tatiana.orsulova@fstroj.uniza.sk * Corresponding author. Tel.: +421-41-513-2632. E-mail ad ress: tatiana.orsulova@fstroj.uniza.sk

* 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.

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.2018.12.352