PSI - Issue 6

ScienceDirect Available online at www.sciencedirect.com Available o line at www.sciencedire t.com ScienceDirect Structural Integrity Procedia 00 (2016) 000 – 000 Procedia Structu al Integrity 6 (2017) 336–343 Available online at www.sciencedirect.com ScienceDirect StructuralIntegrity Procedia 00 (2017) 000 – 000 Available online at www.sciencedirect.com ScienceDirect StructuralIntegrity 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) Incubation time criterion analysis of rock materials under dynamic loadings A. Martemyanov a, *, N.S. Selyutina a,b , A. Katorina c a St.-Petersburg State University, 7/9 Universitetskaya nab.,St. Petersburg 199034, Russia b Institute Problem of Mechanical Engineering,V. O., 61 Bolshoj prosp.,Russian Academy of Sciences,St. Petersburg 199178, Russia c St.-Petersburg State University of Film and Television,13 Pravda str, St. Petersburg 191119, Russia Abstract Analysis of tensile strength properties of rocks under dynamic loading on the basis of the structural-temporal approach is given. The possible values of incubation times of granites and marbles for different dynamic tests (split Hopkinson bar test, a drop weight test, Brazilian test) are presented. Obtained results show that a statistical dispersion of incubation times for granite is less than for marble. An influence of anisotropy of rocks on the incubation time is presented. © 2017 The Authors. Published by Elsevier B.V. Peer-review under responsibility of the MCM 2017 organizers. Keywo ds: incubation time; dynamic tensile strength; gra ite; marble 1. Introduction The behaviour of rock materials strength represents a significant interest for environmental and civil engineering, da and canal making, railway embankment construction, mining and seismic works and geodynamic modeling. It is well known that rock mechanical properties vary in wide range of strain rate because of its inhomogeneous structure influenced by pore space geometry, grain sizes and etc. and notable anisotropy. In addition one is rate dependent and its strength properties quickly increase with growth of stress rate or strain rate (Zhang et al. (2013a, 2013b), Dai et al. (2010a, 2010b, 2010c), Dai and Xia (2010), Bragov et al. (2012, 2013, 2015)). XXVII International Conference “Mathematical and Computer Simulations in echanics of Solids and Structures”. Fundamentals of Static and Dynamic Fracture (MCM 2017) Incubation time criterion analysis of rock materials under dynamic loadings A. Martemyanov a, *, N.S. Selyutina a,b , A. Katorina c a St.-Petersburg Stat University, 7/9 Universitetskaya n b.,St. P tersburg 199034, Russia b Institute Problem of M chanical Engi eering,V. O., 61 Bolshoj prosp.,Russi n Academy of Sciences,St. Petersburg 199178, Russia c St.-Petersburg State University of Film and Television,13 Pravda str, St. Petersburg 191119, Russia Abstract Analysis of tensile strength properties of rocks under dyna ic loading on the basis of the structural-temporal approach is given. The possible values of incubation times of granites and marbles for different ynamic tests (split Hopkinson bar test, a drop weight test, Brazilian test) are presented. Obtained results show that a statistical disp rsion of incubation times for granite is less than for marble. An influence of anisotropy of rocks on the incubation time is presented. © 2017 The Authors. Published by Elsevier B.V. Pe r-r view under res on ibili y of the MCM 2017 organizers. Keywords: incubation time; dynamic tensil strength; granite; marble 1. Introduction The behaviour of rock materials strength represents a significant interest for environmental and civil engineering, dam and canal making, railway embankment construction, mining and seismic works and geodynamic modeling. It is well known that rock m chanical properties vary in wide range of strain rate because of its inhomogeneous structu nfluenced by pore space geometry, grain sizes and etc. and notable anisotropy. In addition one is rate dependent and its strength properties quickly increase with growth of stress rate or strain rate (Zhang et al. (2013a, 2013b), Dai et al. (2010a, 2010b, 2010c), Dai and Xia (2010), Bragov et al. (2012, 2013, 2015)). © 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.: +7-960-262-2798. E-mail address: st021087@student.spbu.ru * Correspon ing au hor. Tel.: +7-960-262-2798. E-mail address: st021087@student.spbu.ru

* 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.

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.2017.11.051