PSI - Issue 5

ScienceDirect Available online at www.sciencedirect.com Av ilable o line at ww.sciencedire t.com cienceDirect Structural Integrity Procedia 00 (2016) 000 – 000 Procedia Structu al Integrity 5 (2017) 363–368 Available online at www.sciencedirect.com ScienceDirect Structural Integrity Procedia 00 (2017) 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. 2nd International Conference on Structural Integrity, ICSI 2017, 4-7 September 2017, Funchal, Madeira, Portugal Measurement of Dy amic Fracture in Hot Forming Processing : Effect of Steel Elongation and Temperature Abdelouahid El Amri a * , Mounir El Yakhloufi Haddou a , Abdellatif Khamlichi b a Department of Physics, Faculty of Sciences Abdelmalek Essaadi University Tétouan 93030, Morocco b Departments TITM, National School of Applied Sciences Abdelmalek Essaadi University Této an 93030, Morocco Under the combined influence of a thermal and applied stress, engineering thermoplastics may undergo a phenomenon known as thermomechanical fatigue or as environmental stress cracking. The mechanisms of fatigue propagation are examined with particular emphasis on the similarities and differences between cyclic crack growths in hot forming processing materials. The influence of damage on the intensity of the destruction of materials is studied as well. The fracture of hot forming processing materials subject to high thermal and mechanical loadings rates is notably affected by material inertia. At high loading rates, tiny fluctuations in the plastic flow field induce important accel ration of materials particles. This, significant inertia effects are taking place at the macroscopic level and som times lso at the level of microscopi deformation mechanisms. Numerical simulations of crack pr pagation in cylindrical specim n based on Finite Element Analysis (FEA) by ABAQUS Sof ware, de onstrate that the prop sed method provides an effective eans to simula e dynamic fracture i la ge scale cylindrical structures with engin ering accuracy. © 2017 The Authors. Published by Els v er B.V. Peer-review under responsibility of the Scientific Committee of ICSI 2017. a a b m i e e s © 2017 The Authors. Published by Elsevier B.V. Peer-review under responsibility of the Scientific Committee of ICSI 2017 © 2016 The Authors. Published by Elsevier B.V. Peer-review under responsibility of the Scientific Committee of PCF 2016. Keywo ds: Damage, the momechanical Fatigue, Dy ami fracture, Hot forming processing Abstract

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

* Corresponding author. E-mail address: abdelouahid26@gmail.com

2452-3216 © 2016 The Authors. Published by Elsevier B.V. Peer-review under responsibility of the Scientific Committee of PCF 2016. 2452-3216  2017 The Authors. Published by Elsevier B.V. Peer-review under responsibility of the Scientific Committee of ICSI 2017 10.1016/j.prostr.2017.07.183 * 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 ICSI 2017.