PSI - Issue 13

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 13 (2018) 1373–1377 Available online at www.sciencedirect.com Structural Integrity Procedia 0 (20 8) 0– 0 Available online at www.sciencedirect.com 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. © 2018 The Authors. Published by Elsevier B.V. Peer-review under responsibility of the ECF22 organizers. ECF22 - Loading and Environmental e ff ects on Structural Integrity Rupture of copper rings by a magnetic-pulse method over a wide range of loading times S. A. Atroshenko a,b, ∗ , V. A. Morozov b , V. M. Kats b , D. A. Gribanov a , Yu. V. Petrov a,b a Institute of Problems of Mechanical Engineering, 61 Bolshoj pr., V.O., Saint Petersburg 199178, Russia b Saint Petersburg State University, 7 / 9 Universitetskaya Emb., Saint Petersburg 199034, Russia Abstract This paper is devoted to investigations of copper ring samples loaded under high-strain-rate by magnetic pulse method. Three loading schemes are used to achieve strain rate up to 1000000 1 / s . The temporal dependence of strength in wide range of time is presented. Microst ucture investigations of fracture urface and c oss-se tion under th se loading condit ons were carried out. c 2018 The Authors. Published by Elsevier B.V. Peer-review under responsibility of the ECF22 organizers. Keywords: high-strain-rate loading; ring samples; magnetic pulse loading; microstructure analysis 1. Introduction Magnetic-pulse methods possessed a number of significant advantages in comparison with other known methods of dynamic loading of materials, such as low energy consumption, high productivity, economical consumption of raw materials and ecological purity. Only such methods allowed to obtain high r tes of deformation and destruction of materials in laboratory conditions. An original magnetic-pulse method for tangential expansion up to destruction of thin metal rings was proposed in the works of researchers O.H Zhang, K. Ravi-Chandar (Zhang and Ravi-Chandar (2006), Zhang and Ravi-Chandar (2008), Zhang et al. (2009), Zhang and Ravi-Chandar (2010)). This method makes it possible to achieve radial expansion velocities of the ring in the range 80 − 200 m / s at deformation rates of the order of 10 4 s − 1 . Expansion of the metal rings involved such researchers as S. Mercier and A. Molinari (Mercier and Molinari (2004)), A. E. Carden, P. E. Williams and R. R. Karpp (Carden et al. (1981)), G. V. Stepanov (Stepanov (1991)), E. Grady and D. A. Benson (Grady and Benson (1983)), M. Altynova, X. Hu and G. S. Daehn (Altynova et al. (1996)). It should be noted that a traditional electromagnetic method based on the charge of the capacitor and its discharge through the solenoid was used in all the above-mentioned works on the expansion of metal rings. This method makes it possible to obtain a strain rate not exceeding 10 4 s − 1 . In this paper, the results of an investigation on the deformation ECF22 - Loading and Environmental e ff ects on Structural Integrity Rupture of copper rings by a magnetic-pulse method over a wide range of loading times S. A. Atroshenko a,b, ∗ , V. A. Morozov b , V. M. Kats b , D. A. Gribanov a , Yu. V. Petrov a,b a Institute of Problems of Mechanical Engineering, 61 Bolshoj pr., V.O., Saint Petersburg 199178, Russia b Saint Petersburg State University, 7 / 9 Universitetskaya Emb., Saint Petersburg 199034, Russia Abstract This paper is devoted to investigations of copper ring samples loaded under high-strain-rate by magnetic pulse method. Three loading schem s are used to achieve stra rate up to 1000000 1 / s . The temporal ependence of strength in wide range of time is presented. Microstructure investigations of fracture surface and cross-section under these loading conditions were carried out. c 2018 The Authors. Published by Elsevier B.V. P r-review under responsibility of the ECF22 organizers. Keywords: high-strain-rate loading; ring samples; magnetic pulse loading; microstructure analysis 1. Introduction M gnetic-pulse me hods possessed a number of significant dvantag s in comparison with other known etho s of dynamic loading of materials, such as low energy c nsumption, hig productivity, ec nomical consumption of raw materials and ecological purity. Only such methods allowed to obtain high rates of deformation and destruction of materials in laboratory conditions. An original magnetic-pulse method for tangential expansion up to destruction of thin metal rings was proposed in the works of researchers O.H Zhang, K. Ravi-Chandar (Zhang and Ravi-Chandar (2006), Zhang and Ravi-Chandar (2008), Zhang et al. (2009), Zhang and Ravi-Chandar (2010)). This method makes it possible to achieve radial expansion velocities of the ring in the range 80 − 200 m / s at deformation rates of the order of 10 4 s − 1 . Expansion of the metal rings involved such researchers as S. Mercier and A. Molinari (Mercier and Molinari (2004)), A. E. Carden, P. E. Williams and R. R. Karpp (Carden et al. (1981)), G. V. Stepanov (Stepanov (1991)), E. Grady and D. A. Benson (Grady and Benson (1983)), M. Altynova, X. Hu and G. S. Daehn (Altynova et al. (1996)). It should be noted that a traditional electromagnetic method based on the charge of the capacitor and its discharge through the solenoid was used in all the above-mentioned works on the expansion of metal rings. This method makes it possible to obtain a strain rate not exceeding 10 4 s − 1 . In this paper, the results of an investigation on the deformation © 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.

2452-3216 © 2016 The Authors. Published by Elsevier B.V. Peer-review under responsibility of the Scientific Committee of PCF 2016. ∗ Corresponding author. Tel.: + 7-812-321-47-65 ; fax: + 7-812-321-47-71. E-mail address: satroshe@mail.ru 2210-7843 c 2018 The Authors. Published by Elsevier B.V. Peer-review under responsibility of the ECF22 organizers. ∗ Corresponding author. Tel.: + 7-812-321-47-65 ; fax: + 7-812-321-47-71. E-mail address: satroshe@mail.ru 2210-7843 c 2018 The Authors. Published by Elsevier B.V. Peer-revi w under responsibility of the ECF22 orga izers. * 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. 10.1016/j.prostr.2018.12.287