PSI - Issue 6

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 Structu al Integrity 6 (2017) 252–258 Available online at www.sciencedirect.com ScienceDirect Structural Integrity Procedia 00 (2017) 000–000 Available online at www.sciencedirect.com ScienceDirect Structural Integrity Procedia 00 (2017) 000–000

www.elsevier.com/locate/procedia www.elsevier.com/locate/procedia

www.elsevier.com/locate/procedia

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 Auth rs. Publish d 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) Specifics of mechanical and strength rock properties estimation for wells drilling and exploitation Chebyshev Igor a , Legkokonets Vladislav b , Lukin Sergey a * a Gazpromneft Science & Technology Centre, Geomechanics Unit, 75-79 liter D Moika River emb., 190000, St. Petersburg, Russian Federation b Saint-Petersburg Mining University, Department of oil and gas fields development and operation, Vasilievsky Island, 21 st line, 2, 199106, St. Petersburg, Russian Federation Abstract The paper describes the estimation specifics of mechanical and strength rock properties for well drilling and exploitation. Important processes throughtout oil and gas fields’ lifetime (well drilling, exploitation, hydraulic fracturing, etc.) need accurate estimation of current stress state, correct well logs and core data interpretation, position identification of layers intersected by well, etc. The authors of this paper demonstrate problems in the process of coring, core transportation, lab studies, interpretation and usage of experimental data for borehole stability models creation. These models can be used in forecasting hole wall while well drilling and exploitation. Specifics of each step are described, starting with the first vital step in core research workflow – core extracting, and finishing with specifics of hydraulic fracture strength estimation. © 2017 The Authors. Published by Elsevier B.V. Peer-review under responsibility of the MCM 2017 organizers. Keywords: geomechanics; coring; wellbore stability; compressional slowness; shear slowness; young modulus; poisson rate; machine learning; neural networks; fracture toughness XXVII International Conference “Mathematical and Computer Simulations in echanics of Solids and Structures”. Fundamentals of Static and Dynamic Fracture (MCM 2017) Specifics of mechanical and strength rock properties estimation f r wells drilling and exploitation Chebyshev Igor a , Legkokonets Vladislav b , Lukin Sergey a * a Gazpromneft Science & Tech ology Centre, Geomechanics Unit, 75-79 liter D Moika River mb., 190000, St. Petersburg, Russian Federation b Saint-Petersburg Mining University, Department of oil and gas fields developmen a d operation, Vasilievsky Island, 21 st line, 2, 199106, St. Petersburg, Russian Federation Abstract The paper describes the estimation specifics of mechanical and strength rock properties for well drilling and exploitation. Important processes throught ut oil and gas fields’ lifetime (well drilling, exploitation, hydraulic fracturing, etc.) need accurate estimation of current stress state, correct well logs and core data interpretation, osition identification of layers intersected by well, etc. The authors of this paper demonstrate problems in the process of coring, core transportation, lab studies, i terpretation and usage of experimental data for boreh le stability models c eation. Th se models can be used in forecasting hole wall while well drilli g and exploitation. Specifics of each step are described, starting with the first vital step in core research workflow – core extracting, and finishing with specifics of hydraulic fracture strength estimation. © 2017 The Authors. Published by Elsevier B.V. Peer-review under responsibility of the MCM 2017 organizers. Keywords: geomechanics; coring; wellbore stability; compressional slowness; shear slowness; young modulus; poisson rate; machine learning; neural networks; fracture toughness

© 2016 The Authors. Published by Elsevier B.V. Peer-review under responsibility of the Scientific Committee of PCF 2016. 1. Introduction 1. Introduction

Keywords: High Pressure Turbine Blade; Creep; Finite Element Method; 3D Model; Simulation. Mainly, borehole stability depends on the rock properties that well intersects. The precise estimation of mechanical, strength and other rock properties is a successful prediction of well-borehole behavior while drilling, Mainly, borehole stability depends o the rock pr perties that well intersects. The precise estimation of mechanical, strength and other rock properties is a successful prediction of well-borehole behavior while drilling,

* Corresponding author. Tel.: +7-921-590-06-69. E-mail address: chebyshov@gmail.com * Correspon ing author. Tel.: +7-921-590-06-69. E-mail address: chebyshov@gmail.com

* Corresponding author. Tel.: +351 218419991. E-mail address: amd@tecnico.ulisboa.pt 2452 3216 © 2017 Th 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.

2452-3216 © 2016 The Authors. Published by Elsevier B.V. Peer-review under responsibility of the Scientific Committee of PCF 2016.

2452-3216 Copyright  2017 The Authors. Published by Elsevier B.V. Peer-review under responsibility of the MCM 2017 organizers. 10.1016/j.prostr.2017.11.038