PSI - Issue 5

ScienceDirect Available online at www.sciencedirect.com Av ilable o line at ww.sciencedire t.com ScienceDirect Structural Integrity Procedia 00 (2016) 000 – 000 Procedia Struc ural Integrity 5 (2017) 1108–1115 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. 2nd International Conference on Structural Integrity, ICSI 2017, 4-7 September 2017, Funchal, Madeira, Portugal Advances on the use of non-destructive techniques for mechanical characterization of stone masonry: GPR and sonic tests Rachel Martini a* , Jorge Carvalho b , Nuno Barraca c , António Arêde d , Humberto Varum e a PhD student, CONSTRUCT-LESE – Faculty of Engineering (FEUP), University of Porto, Portugal, martini.rachel@fe.up.pt b Assistant Professor, CERENA-DEM – Faculty of Engineering (FEUP), University of Porto, Portugal, jorcarv@fe.up.pt c Geophysicist, Dryas Octopetala, Rua Aníbal de Lima, Coimbra-Portugal, nuno.barraca@morph.pt d Associate Professor, CONSTRUCT-LESE – Faculty of Engineering (FEUP), University f Porto, Portugal, aarede@fe.up.pt e Full Professor, CONSTRUCT-LESE – Faculty of Engineering (FEUP), University of Porto, Portugal, hvarum@fe.up.pt The main aim of the present work is to use NDT (non-destructive test) for characterization of stone masonry and obtaining information regarding the related mechanical parameters. Due to historical and cultural value that historic buildings embody the maintenance and rehabilitation work is important to preserve the appreciation of history. The preservation of buildings classified as historic and cultural heritage is of social interest, as they marked the history of society. Considering the object of research as a histori building, it is n t recommended to use destru tive investigative techniques. This paper focuses on the application of geophysical m thod , namely Ground Penetrating R dar (GPR) and sonic tests for c vil engineeri g purposes as NDT research options. The GPR comprises a generator of el ctromagnetic puls s, transmitting and re eiving antennae and a cont l un t with signal displaying and recording f cilities. The sonic tests are perf rmed with an ins ru ented hammer and accelerometers for bo y and surface waves rece tion, namely, P, S and R. T is work allowe understanding the behavior of two-leaf ston m sonry walls by relating the NDT parameters with mechanical properties. To assist this analysis, the compression test results will be used. Simultaneously to the application of NDT's were carried on destructive tests on the stone masonry, like compression tests, to obtain compressive strength, Young's modulus and Poisson’s ratio. These data will be correlated with the NDTs’ results. The use of other techniques in line with the GPR method is widely used in order to address limitations of the GPR. The GPR presented radargrams suitable for the structural constitutive type of the walls and the zones identified with the presence of more resistant structural elements validate the results obtained by the sonic tests. With the sonic test results it is possible to calculate values of Poisson's ratio, Young's modulus and shear modulus, to characterize the material. For sonic tests, the highest velocity points are in the header © 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. Abstract

* Corresponding author. Tel.: +0-000-000-0000 ; fax: +0-000-000-0000 . E-mail address: martini.rachel@fe.up.pt

2452-3216 © 2016 The Authors. Published by Elsevier B.V. Peer-review under responsibility of the Scientific Committee of PCF 2016. 2452-3216  2017 The Authors. Published by Elsevier B.V. Peer-review under responsibility of the Scientific Committee of ICSI 2017 10.1016/j.prostr.2017.07.096 * 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 Scientific Committee of ICSI 2017.