PSI - Issue 6

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ScienceDirect Available online at www.sciencedirect.com Av ilable o line at ww.sciencedire t.com ScienceDirect Structural Integrity Procedia 00 (2016) 000 – 000 Procedia Structu al Integrity 6 (2017) 316–321 ScienceDirect Structural Integrity Procedia 00 (2017) 000 – 000 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. Copyright © 2017 The Authors. Published by Elsevier B.V. Peer-review under responsibility of the MCM 2017 organizers. XXVII International Conference ―Mathematical and Computer Simulations in Mechanics of Solids and Structures‖. Fundamentals of Static and Dynamic Fracture (MCM 2017) Determination of Fracture Tectonics of Rocks by Reconstruction of Stresses and Analysis of Displacements Sidelnik A. ª * ª Peter the Great St.Petersburg Polytechnic University (SPbPU), Russia, 195251, St.Petersburg, Polytech icheskay , 29 Abstract This report presents an algorithm for determining fault tectonics based on the calculation of stress inversion. The inversion model of str ss is tool that allows not only to reveal the presenc of discontinuities, but also to determine their spatial orientation and to evaluate the influence on the stress field. © 2017 The Authors. Published by Elsevier B.V. Peer-review under responsibility of the MCM 2017 organizers. Keywords: inversion model of stress, geomechanics, fractures, discontinuities, displacement Introduction Exploration and extraction of oil reservoirs requires consideration of the features of geological structure, in particular, the anisotropy of the void space represented by a network of fractures. The reconstruction of the stress field is a tool for studying the patterns of fracture development in rocks and assessing the tectonic evolution of the region. Discontinuities that occurred at diff rent t ges of the formation of the oil field are the main source of heterogeneity in th str ss fiel , w at is extr ely important for drilling w lls and for hydraulic fracturing. Input data In order to restore the direction of paleostresses, it is necessary to know the orientation of the discontinuities in space. XXVII International Conference ―Mathematical and Computer Simulations in Mechanics of Solids and Structures‖. Fundamentals of Static and Dynamic Fracture (MCM 2017) Determination of Fracture Tectonics of Rocks by Reconstruction f Stresses and Analysis of Displacements Sidelnik A. ª * ª Peter the Great St.Petersburg Polytechnic U iv rsity (SPbPU), Russia, 195251, St.Petersburg, Polytechnicheskaya, 29 Abstract This report p esents a algorithm for determining fault tectonics based on the calculation of stress inversion. The inversion model of stress is a tool that allows not only to reveal the presence of discontinuities, but also to determine their spatial orientation and to evaluate the influence on the stress field. © 2017 The Authors. Published by Elsevier B.V. P er-review under responsibility of the MCM 2017 organizers. Keywords: inversi n model of stress, geome h nics, fractures, discontinuities, displacement In roduction Exploration and extraction of oil reservoirs requires consideration of the features of geological structure, in particular, the anisotropy of the void space represented by a network of fractures. The reconstruction of the stress field is a tool for studying the patterns of fracture development in rocks and assessing the tectonic evolution of the region. Discontinuiti s that occurred at different stages of the formation of the oil field are the main source of heterogeneity in the stress field, what is extremely important for drilling wells and for hydraulic fracturing. Input data In order to restore the direction of paleostresses, it is necessary to know the orientation of the discontinuities in space. © 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 © 2017 The Authors. Published by Elsevier B.V. Peer-review under responsibility of the MCM 2017 organizers. 2452-3216 © 2017 The Authors. Published by Elsevier B.V. Peer-review under responsibility of the MCM 2017 organizers. * Corresponding author. Tel.: +7-931-318-9186 (A. Sidelnik) E-mail addresses: Sidelnik.AV@gazprom-neft.ru (A. Sidelnik) * Corresponding author. Tel.: +7-931-318-9186 (A. Sidelnik) E-mail addresses: Sidelnik.AV@gazprom-neft.ru (A. Sidelnik)

2452-3216 Copyright  2017 The Authors. Published by Elsevier B.V. Peer-review under responsibility of the MCM 2017 organizers. 10.1016/j.prostr.2017.11.048

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