PSI - Issue 4

ScienceDirect Available online at www.sciencedirect.com Av ilable o line at ww.sciencedire t.com ienceDirect Structural Integrity Procedia 00 (2016) 000 – 000 Procedia Structural Integrity 4 (2017) 95–105 Available online at www.sciencedirect.com ScienceDirect Structural Integrity Procedia 00 (2017) 000 – 000 il l li t . i i t. tr t r l I t rit r i ( )

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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. ESIS TC24 Workshop "Integrity of Railway Structures", 24-25 October 2016, Leoben, Austria Damage Tolerance Concepts for Railway Switch Components Stefan Kolitsch a,b *, Hans-Peter Gänser a , Reinhard Pippan b a Materials Center Leoben Forschung GmbH, Roseggerstraße 17, A-8700 Leoben b Erich Schmid Institute of Materials Science, Austrian Academy of Sciences, Jahnstraße 12, A-8700 Leoben High dynamic forces based on small radii and rail transitions result in increasing loads on switch components. This demands improved wear resistance and the assessment of high strength materials. The implementation of new materials requires new design concepts t king into ac ount the damage tolerance behavior of high strength materials in switch components. Therefore, a concept for the assignment of new materials regarding the manufacturing process is presented in this work. For the necessary bending process, a static equivalent to the Kitagawa-Takahashi diagram for the maximum admissible strain in the outer fiber depending on the flaw size is introduced. For cyclic loading, the endurance limit is used for dimensioning. Here, a commonly used stress based design concept using the Smith diagram and a fracture mechanics approach using the Kitagawa Takahashi diagram are adapted for such components. © 2017 The Authors. Published by Elsevier B.V. Peer-review under responsibility of the Scientific Committee of ESIS TC24. Keywords: switch, rails, Smith diagram, Kitagawa-Takahashi diagram 1. Introduction Railw y switch components are responsible for th directio change of the train and are, as such, highly loaded parts due to additional dynamic forces. For this reason the safety and quality standards of those components are very high. To reduce the economic effort of exchanging switch blades, their wear resistance should be improved by high strength materials. In this work, new and also adapted safety design concepts are customized for switch components in order to compare different material types and their static and cyclic failure behaviour. , a t i l t , t , - b i i I tit t f t i l i , t i f i , t , - i i ll ii il t iti lt i i i loads on switch components. This demands improved wear resistance and the assessment of high strength materials. The impl t ti t i l i desi t t i i t c t t t l i i t t t i l i it t . , t t i t t i l i t t i i t i t i . t i , t ti i l t t t it i i t i i i l t i i t t i i t l i i i t . li l i , t li it i i i i . , l t i t i t it i t i i t it i i t t . t . li l i .V. i i ilit t i ti i itt . : it , r il , it i r , it - i i r . i il it t i l t i ti t t i , , i l l t t iti l i . t i t t lit t t t i . t i t i it l , t i i t l i i t t t i l . t i , l t t i t t i it t i o er to pare di t t i l t t i t ti li ilure behaviour. Copyright © 2017. The Authors. Publish d by Elsevier B.V. Peer-review under responsibility of the Scientific Committee of ESIS TC24. © 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. Abstract

* Corresponding author. Tel.: +43-664-2164744 E-mail address: stefan.kolitsch@gmx.at i t r. l.: - - - il : t f . lit . t rr

2452-3216 © 2016 The Authors. Published by Elsevier B.V. Peer-review under responsibility of the Scientific Committee of PCF 2016. 2452-3216 Copyright  2017. The Authors. Published by Elsevier B.V. Peer-review under responsibility of the Scientific Committee of ESIS TC24 10.1016/j.prostr.2017.07.006 * Corresponding author. Tel.: +351 218419991. E-mail address: amd@tecnico.ulisboa.pt 2452-3216 © 2017 The Authors. Published by Elsevier B.V. Peer-review under responsibility of the Scientific Committee of ESIS TC24. l i r . . i i ilit t i ti i itt . - t r . li