PSI - Issue 2_A

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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. 21st European Conference on Fracture, ECF21, 20-24 June 2016, Catania, Italy Deformation and fr ture of metal ring samples under the explosion of conductors Morozov V.A. a , Lukin A.A. a , Atroshenko S.A. a,b * , Gribanov D.A. b , Petrov Yu.V. a,b a Saint Petersburg state university, 7-9, Universitetskaya nab., St.Petersburg, 199034, Russia b IPME RAS, V.O., Bolshoy, 61, St.Petersburg, 199178, Russia Abstract The technique of deformation and fracture of ring metal samples was developed using the explosion of conductors in elastomers of cylindrical shape. The work on the optimal choice of the elastomer was carried out. Methods for measuring the displacement of the sample surfaces and the radial pressures were suggested. On the base of these methods the characteristics of the stress strain tate of the matter were investigated. A structural analysis of fracture surfaces was carried out. © 2016 The Authors. Published by Elsevier B.V. Peer-review under resp nsibility of the Scientific Committee of ECF21. Keywo ds: fracture; ring samples; electric explosion of conductors; s ructural analysis. 1. Introduction To date, a lot of methods for high-strain-rate, deformation and fracture of structural materials are developed. Am ng them it is possible to distinguish electro-phys cal methods, used lately, based on electromagnetic action [Zhang and Chandar (2006, Morozov et al. (2011), Morzov et al. (2014)], or electrical explosion of conductors [Imbert et al. (2015)]. The mechanisms that lead to the improvement of the quality of processing of materials under high strain rates, is not fully understood, which significantly limits the possibility of modeling these processes. For a better understanding of the mechanisms of high-speed deformation of materials and the development of accurate models it is necessary to carry out experimental studies to obtain reliable data on the stress-strain state of materials at 21st European Conference on Fracture, ECF21, 20-24 June 2016, Catania, Italy Deformation and fracture of metal ring samples under the explosion of conductors Morozov V.A. a , Lukin A.A. a , Atroshenko S.A. a,b * , Gribanov D.A. b , Petrov Yu.V. a,b a Saint Petersburg state university, 7-9, Universitetskaya nab., St.Petersburg, 199034, Russia b IPME RAS, V.O., Bolshoy, 61, St.Petersburg, 199178, Russia Abstract The technique of deformation and fracture of ring metal samples was developed using the explosion of conductors in elastomers of cylindr cal shap . The w rk on the optimal choic of the ela tomer was carried out. Methods f r measuring the displace nt the sample surfaces and the radial pressures wer sugg sted. On the base of these methods the characteristics of the stress strain st te of the matter were investigated. A structural analysis of fracture surfaces was carrie out. © 2016 The Authors. Published by Elsevier B.V. Peer-review under esponsibility of the Scientific Committee of ECF21. Keywords: fracture; ring samples; electric explosion of conductors; struc ural an lysis. 1. Introduction To date, a lot of methods for high-strain-rate, deformation and fracture of structural materials are developed. Among them it is possible to distinguish electro-physical metho s, used lately, based on el ctromagnetic action [Zha and Chandar (2006, Morozov et al. (2011), Morzo et al. (2014)], or electrical explosi n of condu rs Imbert et al. (2015)]. The mechanisms th t lead to the improv ment of the quality of proc ssing of materials nder high strain rates, is not fully understood, which significantly limits the possibility of modeling these proc sse . For a better unde s and ng of the mechanisms of high-speed defor a ion of mater als and th development of accurate models it is necessary to carry out experimental studi s to obtain reliable d ta on the stress-strain state of materials at Copyright © 2016 The Authors. Published by Elsevier B.V. This is an open access article under the CC BY-NC-ND license (http://creativecommons.org/licenses/by-nc-nd/4.0/). Peer-review under responsibility of the Scientific Committee of ECF21. © 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.

* Corresponding author. Tel.: +351 218419991. E-mail address: amd@tecnico.ulisboa.pt 2452-3216 © 2016 The Authors. Published by Elsevier B.V. Peer-review under responsibility of the Scientific Committee of ECF21. 2452-3216 © 2016 The Authors. Published by Elsevier B.V. Peer-review under responsibility of the Scientific Committee of ECF21. * Corresponding author. Tel.: +7-812-321-4765; fax: +7-812-321-4771. E-mail address: satroshe@mail.ru * Corresponding author. Tel.: +7-812-321-4765; fax: +7-812-321-4771. E-mail address: satroshe@mail.ru

2452-3216 © 2016 The Authors. Published by Elsevier B.V. Peer-review under responsibility of the Scientific Committee of PCF 2016. Copyright © 2016 The Authors. Published by Elsevier B.V. This is an open access article under the CC BY-NC-ND license ( http://creativecommons.org/licenses/by-nc-nd/4.0/ ). Peer review under responsibility of the Scientific Committee of ECF21. 10.1016/j.prostr.2016.06.128