PSI - Issue 2_B

ScienceDirect Available online at www.sciencedirect.com Av ilable o line at ww.sciencedire t.com Sci ceDirect Structural Integrity Procedia 00 (2016) 000 – 000 Procedia Struc ural Integrity 2 (2016) 2214–2221 Available online at www.sciencedirect.com Sci nceD rect Structural Integrity Procedia 00 (2016) 000–000 Available online at www.sciencedirect.com ScienceDirect Structural Integrity Procedia 00 (2016) 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. 21st European Conference on Fracture, ECF21, 20-24 June 2016, Catania, Italy Theoretical inv stigation of influence of peculiarities f internal structure on deformation and fracture of metal-ceramic composites using discrete element approach S.V. Astafurov a,b *, E.V. Shilko a,b , A.S. Grigoriev a , V.E. Ovcharenko a,c , S.G. Psakhie a,b,c a Institute of strength physics and materials science SB RAS, Akademicheskii ave., 2/4, Tomsk, 634055, Russia b National R search Tomsk State University, Leni ave., 36, Tomsk, 634050, ussia c National Research Tomsk Polytechnic Unive sity, Lenin ave., 30, Tomsk, 634050, Russia Abstract The paper is devoted to comparative analysis of the capabilities of the most common models of interfaces which are used for simulation of multiphase materials. Influence of the parameters of these models on the microscopic mechanical properties of the metal-ceramic composites was also investigated. It was shown that the most effective way of explicit modeling of interphase boundaries are models of extended (wide) interface area. For example, models of homogeneous interface zones provide the opportunity to study influence of thermal conditions of composite material production and differenceы betwe n the elastic constants and r eol gical parameters of different phases on integral properties of the omposites. If interphase boundaries are characterized by gradients f elemental composition nd defect structur at th transition from one phas to anoth r, is the ost adequate to use “gradient” models of the interface zones. © 2016 The Authors. Published by Elsevier B.V. Peer-review under responsibility of the Scientific Committee of ECF21. Keywords: Metal-ceramic composites; interphase boundaries; computer-aided simulati n; strength; fracture 1. Introduction Metal-ceramic materials on the base of refractory and highly rigid chemical compounds with a metal binder are characterized by high values of mechanical and tribological properties. This determines their widespread application 21st European Conference on Fracture, ECF21, 20-24 June 2016, Catania, Italy Theoretical investigation of influence of peculiarities of internal structure on deformation and fracture of metal-ceramic composites using discrete element approach S.V. Astafurov a,b *, E.V. Shilko a,b , A.S. Grigoriev a , V.E. Ovcharenko a,c , S.G. Psakhie a,b,c a Institute of strength physics and materials science SB RAS, Akademicheskii ave., 2/4, Tomsk, 634055, Russia b National Research Tomsk State University, Lenin ave., 36, Tomsk, 63 050, Russia c N tional Research Tomsk Polytechnic University, Lenin ave., 30, Tomsk, 634050, Russia Abstract The paper is devoted to comparative analysis of the capabilities of the most common models of interfaces which are used for simul tion of multiphase materials. Influence of the parameters of thes dels on the icroscopic m chanical prope tie of the meta -ceramic com osit s was o investigated. It was shown that the ost effective way of explicit mode ing of interphas boundaries are models of extended (wide) interface rea. For exampl , mod ls of homogeneous interface zo es provide th opportunity to stu y influ nc of thermal conditions of composite material producti n and differenceы betw en the elastic constants and rheol gica parameters of different phases on integral properties of the composites. If i terphase boundari s are haracterize by gradients of elem ntal composition nd defect structu e t th transition from one phase to an ther, is the most adequate to us “ ” models of the interface zones. © 2016 The Authors. Published by Elsev er B.V. Peer-review under espons bility of the Scientific C mmittee of ECF21. Keywords: Metal-ceramic composites; interphase boundaries; computer-aided simula on; strengt ; f cture 1. Introduction Metal-ceramic materials on the base of refractory and highly rigid chemical compounds with a metal binder are charac eriz d by high values of m chanical and tribological properties. This determines their idespread application Copyright © 2016 The Authors. Published by Elsevier B.V. This is an open access article under the CC BY-NC-ND license (http://creativecommons.org/licenses/by-nc-nd/4.0/). Peer-review under responsibility of the Scientific Committee of ECF21. © 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 © 2016 The Authors. Published by Elsevier B.V. Peer-review und r responsibil ty of the Scientific Committee of ECF21. 2452-3216 © 2016 The Authors. Published by Elsevier B.V. Peer review under r sponsibility of the Scientific Committee of ECF21. * Corresponding author. Tel.: +7-3822-286-971; fax: +7-3822-492-576. E-mail address: svastafurov@gmail.com * Corresponding author. Tel.: +7-3822-286-971; fax: +7-3822-492-576. E-mail address: svastafurov@gmail.com

2452-3216 © 2016 The Authors. Published by Elsevier B.V. Peer-review under responsibility of the Scientific Committee of PCF 2016. Copyright © 2016 The Authors. Published by Elsevier B.V. This is an open access article under the CC BY-NC-ND license ( http://creativecommons.org/licenses/by-nc-nd/4.0/ ). Peer review under responsibility of the Scientific Committee of ECF21. 10.1016/j.prostr.2016.06.277