PSI - Issue 13

ScienceDirect Available online at www.sciencedirect.com Available online at ww.sciencedire t.com Scie ceDirect Structural Integrity Procedia 00 (2016) 000 – 000 Procedia Structu al Integrity 13 (2018) 914–919 Available online at www.sciencedirect.com ScienceDirect Structural Integrity Procedia 00 (2018) 000–000 Available online at www.sciencedirect.com ScienceDirect Structural I t 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 A method for component-oriented toughness analysis of modern multiphase steels Markus Könemann a , Victoria Brinnel a , Manuel Henrich a and Sebastian Münstermann a a Steel Institute (IEHK) RWTH-Aachen University, Intzestraße 1, 52072 Aachen, Germany *Tel.: +49-241-80-92911; fax: +49-241-80-92796; E-mail address: M rkus.Koenemann@iehk.rwth-aachen.de Abstract Steel is still the most important construction material for private and utility vehicles. The saving of fuel based on crude oil is therefore always associated with a reduction in weight of the components made of steel. The dimensioning of these components plays an important role for the weight reduction of modern vehicles. If components are particularly efficient, they are able to withstand the loads occurring with minimum material usage throughout the entire product life. For efficient components, considering the toughness of modern multiphase steels is a main factor. So far, here is no suitabl method t investigate sheets with sm ll thicknesses in an experiment that is comparable to the Charpy impact test. Therefore, a n w test procedure for steels with sheet thicknesses below 2 mm has been developed in rec nt years at the Steel Institute of RWTH-Aachen. This procedure can be used to avoid over-dimensioning with unnecessary reserves, which lead to inefficient vehicles with high fuel consumption. The method proposed in this article for the investigation of these materials is the tensile impact test. This enables the toughness examination of thin sheets and provides information about their behavior in relevant stress situations. In the presented study, the experiment is presented and a procedure for the quantitative estimation of necessary material properties in special stress situations is described. Numerical simulations can be used to identify highly stressed regions and define stress states that characterize these regions. In a sample catalogue created for the tensile impact test, a sample can be selected that matches the stress state in the component. Thus, the potential of the material can be checked quickly and without great effort. The article shows the test procedure and presents the sample catalogue. In addition, an outline of a procedure to link experiments and simulation-based investigations will be presented. ECF22 - Loading and Environmental effects on Structural Integrity A method for component-oriented toughness analysis of modern multiphase steels Markus Könemann a , Victoria Brinnel a , Manuel Henrich a and Sebastian Münsterman a a Steel Institute (IEHK) RWTH-Aachen University, Intzestraße 1, 52072 Aachen, Germany *Tel.: +49-241-80-92911; fax: +49-241-80-92796; E-mail addres : Markus.Koenemann@iehk.rwth-aachen.de Abstract Steel is still the most important construction material for private and utility vehicles. The saving of fuel based on crude oil is th refore always associated with a reduction in w ight of the components made of steel. The dimensioning of these component plays an important r le for the weight reduction of m dern vehicles. If components are particularly efficient, th y are abl to with t d the loads occurring ith minimum material usag throughout the entire product life. For efficient components, considering the toughness of modern ultiphase ste ls is a main factor. So far, there is n s itable method to investigate sheets with small thicknesses in an experiment that is comparable to the Charpy impact test. Therefore, a new test procedure for st l ith heet thicknesses below 2 mm has been developed in r cent years at the Steel In titute of RWTH-Aachen. This procedure can be used to avoid over-dimensioning with u necessary reserves, which lead to inefficient vehicles with high fuel consumption. The method proposed in this article for the inve tigation of these materials is the tensile impact test. This enables the toughness examinati n of thin sheets and provides information ab ut their behavior in relevant stress situation . In the presented study, the experiment is presented and a procedure for the quantitative estimation of necessary material properties in special stress situations is described. Numerical simulations can be used to identify highly stressed regions nd define stress states th t characterize these regions. In a sa ple catalog e created for the t nsile impact test, a sample can be selected that matche the stress state in the component. Thus, the potential f the m t rial can be checked quickly and without great effort. The rticle s ows the test procedure and presents t sample catalogue. In addition, an outline of a procedure to link experiments and imulation-based investigations will be presented. © 2016 The Authors. Published by Elsevier B.V. Peer-review under responsibility of the Scientific Committee of PCF 2016. © 2018 The Authors. Published by Elsevier B.V. Peer-review under responsibility of the ECF22 organizers. Keywords: High Pressure Turbine Blade; Creep; Finite Element Method; 3D Model; Simulation. © 2018 The Authors. Published by Elsevier B.V. Peer-review under responsibility of the ECF22 organizers. © 2018 The Authors. Published by Elsevier B.V. Peer-review under responsibility of the ECF22 organizers.

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* 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 o ganizers.

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.2018.12.172