PSI - Issue 13

ScienceDirect Available online at www.sciencedirect.com Av ilable o line at www.sciencedire t.com ScienceDirect Structural Integrity Procedia 00 (2016) 000 – 000 Procedia Structural Integrity 13 8 34–38 Available online at www.sciencedirect.com ScienceDirect Structural Integrity Procedia 00 (2018) 000 – 000 Available online at www.sciencedirect.com ScienceDirect Structural I tegrity 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 Lifetime assessment of additive manufactured polymer materials by means of the rolling ring test using cyclically loaded notched ring specimens Ralf Lach a *, Andrea Monami a,b , Sören Grießbach c , Volker Grießbach d , Wolfgang Grellmann a a Polymer Service GmbH Merseburg, Eberhard-Leibnitz-Straße 2, 06217 Merseburg, Germany b Merseburg University of Applied Sciences, Department of Engineering and Natural Sciences, Eberhard-Leibnitz-Straße 2, 06217 Merseburg, Germany c GS-Pro GmbH, Rabensteiner Straße 3, 09224 Chemnitz, Germany d VG Kunststofftechnik GmbH, Ludwig-Richter-Straße 38, 09131 Chemnitz, Germany Compared to other methods of fatigue testing which are in ed of expensive testing machi es and often hi hly time-consum ng, th d veloped rolling ring tester is cost-effective, easily to handle and allows r latively fast data acquisition. Within only a few days essential information for fast quality ass rance of las r-sint red parts are available such as about the influence of the processing conditions on the lifetime under cyclic loading. The number of cy les t b eak has be n found t increase nearly logarithmically with decreasing defor ation of the laser-sintered rolling rings made of polyamide 12. This behavior corresponds to a transition from fully stable fatigue crack growth to mixed stable – unstable crack propagation. Furthermore, the number of cycles at break increases linearly with increasing energy density used during the laser sintering process. © 2018 The Authors. Published by Elsevier B.V. Peer-review under responsibility of the ECF22 organizers. © 2018 Th Authors. Published by Elsevier B.V. Peer-review under responsibility of the ECF22 organizers. ECF22 - Loading and Environmental effects on Structural Integrity Lifetime assessment of additive manufactured polymer materials by means of the rolling ring test using cyclically loaded notched ring specimens Ralf Lach a *, Andrea Monami a,b , Sören Grießbach c , Volker Grießbach d , Wolfgang Grellmann a a Polymer Service GmbH Merseburg, Eberhard-Leibnitz-Straße 2, 06217 Merseburg, Germany b Merseburg University of Appli d ciences, Department of Engineering and Natural Sciences, Eberhard-Leibnitz-Straße 2, 06217 Merseburg, Germ y c GS-Pro GmbH, Rabensteiner Straße 3, 09224 Chemnitz, Germany d VG Kunststofftechnik GmbH, Ludwig-Richter-Straße 38, 09131 Chemnitz, Germany Abstract Compared to other methods of fatigue testing which are in need of expensive testing machines and often highly time-consuming, the developed rolling ring tester is cost-effective, asily t ha dle and allows relatively fast data acquisition. Withi ly a few day essential information for fa t quality assurance of laser-sintered part are a ailable such as about th in luence of th processing conditi ns on t e lifetime under cyclic loading. The number of cycles at break has been found to incr as nearly logarithmically with decreasing deformation of the laser-sintered rolling rings made of polyamide 12. This behavior corr sponds t transition from fully stable fatigue crack growth to mixed stable – unstable crack prop gation. Furthermore, the number of cycles at break increases linearly with increasin energy density used duri g the laser sinterin pr cess. © 2018 The Authors. Published by Elsevier B.V. Peer-review under responsibility of the ECF22 organizers. Abstract

© 2016 The Authors. Published by Elsevier B.V. Peer-review under responsibility of the Scientific Committee of PCF 2016. Keywords: polymer materials; additive manufacturing; cyclic loading; lifetime estimation Keywords: polymer materials; additive manufacturing; cyclic loading; lifetime estimation

Keywords: High Pressure Turbine Blade; Creep; Finite Element Method; 3D Model; Simulation.

* 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. * Corresponding author. Tel.: +49 3461 46-2780; fax: +49 3461 46-2592. E-mail address: ralf.lach@psm-merseburg.de * Corresponding author. Tel.: +49 3461 46-2780; fax: +49 3461 46-2592. E-mail ad ress: ralf.lach@psm-merseburg.de

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.2018.12.006