PSI - Issue 10

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 1 (2018) 187–194 Available online at www.sciencedirect.com ScienceDirect Structural Integrity Procedia 00 (2018) 000 – 000 il l li i i t t l t it i

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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. © 2018 The Authors. Published by Elsevier Ltd. This is an open access article under the CC BY-NC-ND license (http://creativecommons.org/licenses/by-nc-nd/3.0/) Peer-review under respon ibility of the scientific committee of the 1st International Conference of the Greek Society of Experimental Mechanics of Materials. 1 st International Conference of the Greek Society of Experimental Mechanics of Materials Re-examining the urban experiment: Variable geometries of spatial intelligence N. Kourniatis a , I. Fakiri b, * a Departmenet of Civil Engineering, University of West Attica, Athens, Greece b School of Architecture N.T.U.A, Athens, Greece Abstract This research is being conducted at a time when the focus of architectural activity shifts from its perception as a form or operational organization, which corresponds to a given architectural program, to its perception as a composition of using material entities, pro perties and relationships. This concern, a result of the emergence of digital technologies and convergence of different scientific disci plines is based on the ability of design tools to support and reinforce the discussion on urban landscape as an open process for action. The term “ smart city ” has been linked with digital applications, sensors, and software to define the city of the future. However, the real challenge is to develop a “ smart city ” that is based on the city of today and enables the integration of smart practices that may reform the spatial st ucture of th city. To his end the research focuse on th ways i which specific key concepts present a dy namic intervention tool l ading to an instrumental and performative constr ction of a “ smarter city ” . Our goal, in an e fort to manag the cities anew, or better yet, the “ smarter cities ” is the introduction of an experimental tool, which participates and supports the urban metabolism. This particular dynamic tool can act, in our opinion, as a filter which not only receives inf rmation but also checks if this information can be modified, while producing connections supported by algorithmic programs. At this level, this paper presents a method for approaching 3D models for n-dimensional hypercubes through polar zonohedra. The paper then goes on to present certain sections of the solids in question and the creation of tessellations on the plane in order to contribute to urban metabo lism. Thus, a key element is the production of an IT infrastructure, which, through distributed computing systems and networks, may gather information, while taking into account the temporality of change evolution, adapting this information to the passage of time. © 2018 The Authors. Published by Elsevier Ltd. This is an open access article under the CC BY-NC-ND license (http://creativecommons.org/licenses/by-nc-nd/3.0/). Peer-review under responsibility of the scientific committee of the 1 st International Conference of the Greek Society of Experimental Mechanics of Materials t b, t t f i il i i , i it f t tti , t , l f it t . . . , t , arch is be , , , . , . , , . , . n e u . , , , , . , , , . , dra. The paper then goes on to e . , , , , gather information, while taking into account the temporality of change evolution, a . 0 t . blished by Elsevier Ltd. This is an open access article t li tt :// ti . /li / / . / . i i ilit f the scientific itt t st t ti l t i t i t l i t i l © 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. Keywords: Landscape; urbanism; planning; conduits; surface; system; matrix; receivers; indicator; process; coding; synthesis t ; t i ; i ; i i t ; ; i ; t i ; i ; l i ; it ; ;

* Corresponding author. Tel.: +0030 694 2800828 E-mail address: ioannafakiri@gmail.com Received: April 30, 2018; Received in revised form: July 13, 2018; Accepted: August 08, 2018 i t . l.: il i i i il.

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2452-3216 © 2016 The Authors. Published by Elsevier B.V. Peer-review under responsibility of the Scientific Committee of PCF 2016. 2452-3216  2018 The Authors. Published by Elsevier Ltd. This is an open access article under the CC BY-NC-ND license (http://creativecommons.org/licenses/by-nc-nd/3.0/) Peer-review under responsibility of the scientific committee of the 1st International Conference of the Greek Society of Experimental Mechanics of Materials. 10.1016/j.prostr.2018.09.027 2452- 3216 © 2018 The Authors. Published by Elsevier Ltd. This is an open access article under the CC BY-NC-ND license (http://creativecommons.org/licenses/by-nc-nd/3.0/). Peer-review under responsibility of the scientific committee of the 1 st International Conference of the Greek Society of Experimental Mechanics of Materials . . i i ti l t li tt :// ti . /li / / . / . i i ilit t i ti i itt t st t ti l t i t i t l i t i l * Corresponding author. Tel.: +351 218419991. E-mail address: amd@tecnico.ulisboa.pt