PSI - Issue 2_A

ScienceDirect Available online at www.sciencedirect.com Av ilable o line at ww.sciencedire t.com ienceDirect Structural Integrity Procedia 00 (2016) 000 – 000 Procedia Structu al Integrity 2 (2016) 285–292 Available online at www.sciencedirect.com ScienceDirect Structural Integrity Procedia 00 (2016) 000–000 Available online at www.sciencedirect.com Sci nceDirect 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 Experimental and numerical analysis of microstructure damage in silica filled epoxy Robert Płatek a *, Łukasz Malinowski a , Robert Sekuła a , Piotr Zwoliński b a ABB Sp. z o. o. Corporate Research Center, 13A Starowislna St. 31-038, Krakow, Poland b University of Science and Technology AGH, Krakow, Poland Abstract The epoxy resin-based systems w th s lica filler are widely used in many products like medium and high voltage electrical components due to its very good dielectric and mechanical properties. Such products require to operate in harsh environments which may activate the process of formation and propagation of the cracks within the resin material. The cracking phenomenon contributes also to manufacturing problems. The epoxy based parts are very often produced by casting during which (post)curing cracking may appear. In order to better understand the cracking phenomena of epoxy resin there is a need to investigate microstructural damage. The work presented in this paper includes both experimental and numerical analysis of microstructure crack initiation and propagation in silica filled epoxy. Basic information about epoxy resin-based systems and its applications are presented. Next, basics of the fracture mechanics with description of available numerical approaches are described. The numerical simulations were prepared for Representative Volume Element (RVE) which was obtained using home made tool for image digitalization. Experime tal analysis consist of in-situ tensile tests and microstructural obs rvations with Scanning Electron Microscope (SEM). At the end a ummary with conclusio s related with p epared numerical analysis and experiments is included. The presented research of the damage of silica/epoxy composite confirms that analysis of the epoxy resin microstructural damage is not trivial and further study is required for its better understanding. 21st European Conference on Fracture, ECF21, 20-24 June 2016, Catania, Italy Experimental and numerical analysis of microstructure damage in silica filled epoxy Robert Płatek a *, Łukasz Malinowski a , Robert Sekuła a , Piotr Zwoliński b a ABB Sp. z o. o. Corporate Research Center, 13A Starowislna St. 31-038, Krakow, Poland b University of Science and Technology AGH, Krakow, Poland Abstract The epoxy resin-based systems with silica filler are widely used in many products like medium and high voltage electrical components due to its very good dielectric and mechanical pro erties. Such products require to operat i harsh environments which may activate the process of formation and propagation of the cracks within the resi material. The cracking phenomenon contributes also to manuf cturing problems. The epoxy based parts are very often produce by casting during whic (post)curing cracking may appear. In order to better understand t e cracking phenomena of epoxy resin there is a need to investigate microstructural damage. The work presented in this paper includes both experimental and numerical analysis of microstructure crack initiation an propagation in silica filled poxy. Basic information about epoxy resin-based systems and its appli ations are pres nted. Next, basics of the fracture mech nics with d scription of available nume ical approaches ar described. The numerical simulati ns were prep red for Representative Volume El ment (RVE) which was obtained using ho e made tool for image di italization. Experimental analysis consist of in-situ tensile tests and microstructural observations with Scanning Electron Microscope (SEM). At the end a summary with conclusions related with prepared numerical analysis and experiments is included. The presented research of the damage of silica/epoxy composite confirms that analysis of the epoxy resin microstructural damage is not trivial and further study is required for its better understanding. © 2016 The Authors. Published by Elsevier B.V. Peer-review under responsibility of the Scientific Committee of PCF 2016. © 2016 The Authors. Published by Elsevier B.V. Peer-review under responsibility of the Scientific Committee of ECF21. © 2016 The Authors. Published b Elsevier B.V. Peer-review under responsibility of the Scientific Committee of ECF21. 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. 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 under responsibility of the Scientific Committee of ECF21. 2452-3216 © 2016 The Authors. Published by Elsevier B.V. Peer-review under responsibility of the Scientific Committee of ECF21. * Corresponding author. Tel.: +48-695-917-473; fax: +48-12-4244-101. E-mail address: robert.platek@pl.abb.com * Corresponding author. Tel.: +48-695-917-473; fax: +48-12-4244-101. E-mail address: robert.platek@pl.abb.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.2016.06.037