PSI - Issue 6

ScienceDirect Available online at www.sciencedirect.com Av ilable o line at www.sciencedire t.com ienceDirect Structural Integrity Procedia 00 (2016) 000 – 000 Procedia Structu al Integrity 6 (2017) 161–167 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

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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 Auth rs. 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) The investigations of the dynamics of fracture of brittle media on the basis of experimental data and theoretical analysis Bragov А.M. a *, Igumnov L.A. a , Karihaloo B.L. b , Konstantinov A.Yu. a , Lamzin D.A. a , Lomunov A.K. a , Petrov Yu.V. c , Smirnov I.V. a a Research Institute of Mechanics, Lobachevsky University, N.Novgorod, 603950, Russia b School of Engineering, Cardiff University, Cardiff CF24 3AA, UK c Institute of Problems of Mechanical Engineering, Russian Academy of Sciences, Saint Petersburg, 199034, Russia Abstract The report analyzes the results of the experimental-theoretical investigation of the response of brittle media (fine-grain concrete, fiber-reinforced concrete, ceramic brick, gabbro-diabase and limestone) to dynamic loading. To determine the properties of the studied materials under dynamic strain rates, the traditional Kolsky method using Split Hopkinson Pressure Bar (SHPB) and its modification, the ‘Brazilian test’, were used. The theoretical interpretation of failure was based on the theory of incubation time of failure developed in the works by N.F. Morozov and Yu.V. Petrov. All the tested materials demonstrate a qualitatively similar character of failure. © 2017 The Authors. Published by Elsevier B.V. Peer-review under responsibility of the MCM 2017 organizers. Keywords: Kolsky method; SHPB; fine concrete; fiber-reinforced concrete; ceramic brick; rock; splitting; incubation time criterion XXVII International Conference “Mathematical and Computer Simulations in echanics of Solids and Structures”. Fundamentals of Static and Dynamic Fracture (MCM 2017) The investigations of the dynamics of fracture of brittle media on the basis of experimental data and theoretical analysis Bragov А.M. a *, Igumnov L.A. a , Karihaloo B.L. b , Konstantinov A.Yu. a , Lamzin D.A. a , Lomunov A.K. a , Petrov Yu.V. c , Smirnov I.V. a a Research Institute f Mechanics, Lobachevsky Un versity, N.Novgorod, 603950, Russia b School of Engineering, Cardiff University, Cardiff CF24 3AA, UK c Institute of Problems of Mechanical Engineering, Russian Academy of Sciences, Saint Petersburg, 199034, Russia Abstract Th report analyzes th results of the experimental-theoretical investigation of the response of brittle media (fine-grain concrete, fiber-reinforced co crete, ceramic br ck, gabbro-di base and limeston ) t dynamic loading. To determine the properties of the stu ied materials under dy amic strain rates, the traditional Kolsky method using Split Hopkinson Pressure Bar (SHPB) and its modification, the ‘Brazilian test’, were used. The theoretical interpretation of failure was based on the theory of incubation time of failure developed in the works by N.F. Morozov and Yu.V. Petrov. All the tested materials demonstrate a qualitatively similar character of failure. © 2017 The Autho s. Publ shed by Elsevier B.V. Peer-review under responsibility of the MCM 2017 organizers. Keywords: Kolsky method; SHPB; fine concrete; fiber-reinforced concrete; ceramic brick; rock; splitting; incubation time criterion © 2016 The Authors. Published by Elsevier B.V. Peer-review under responsibility of the Scientific Committee of PCF 2016. One of the vital directions of scientific research work nowadays is the development of regulatory requirements and measures for protecting buildings and structures from progressing failure in emergencies or from the effect of 1. Introduction One of the vital directions of scientific research work nowadays is the develop ent of regulatory requirements and measures for protecting buildings and structures from progressing failure in emergencies or from the effect of Keywords: High Pressure Turbine Blade; Creep; Finite Element Method; 3D Model; Simulation. 1. Introduction

* 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. * Correspon ing author. Tel.: +7-831-465-16-22; fax: +7 831 465-66-11. E-mail address: bragov@mech.unn.ru * Corresponding author. Tel.: +7-831-465-16-22; fax: +7 831 465-66-11. E-mail address: bragov@mech.unn.ru

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.2017.11.025