PSI - Issue 11

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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 Structu al Integrity 11 (2018) 41 –417

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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. XIV International Conference on Building Pathology and Constructions Repair – CINPAR 2018 Numerical model and consolidation interventions of Palazzo della Ragione in Milan Lorenzo Jurina * Politecnico di Mila o, Piazz L. Da Vinci 32, Milano 20143, Italy Abstract Palazzo della Ragione, erected in 1233, represents one of the most ancient and relevant historic building of Milan. During the last century, the Palace suffered significant modifications, including the realization of an underground tunnel immediately near the foundations. Numerical analysis conducted with a FEM model were developed on the basis of some experimental tests. In particular, the diagnostic campaign performed in 1979, in which flat jacks and dynamic tests were applied, allowed to obtain useful information on the mechanical characterization of the masonry. In addition, the execution of some dynamic identification tests in 2017 returned the own frequencies of the building 40 years later. Before to work on the structural project, the autor verified the consistency between the structural response of the numerical model and the one of the real building, obtained by dynamic tests. Some consolidation interventions were realized on the wooden trusses of the cover, in order to restore either local and global safety situation, with respect to vertical and horizontal load. Copyright © 2018 Elsevier B.V. All rights reserved. Peer-review under responsibility of the CINPAR 2018 organizers Keywords: Dynamic tests, Finite Element Model, Seismic strengthening Copyright © 2018 Elsevier B.V. All rights reserved. Peer-review und r responsibility of the CINPAR 2018 organizers XIV International Conference on Building Pathology and Constructions Repair – CINPAR 2018 Numerical model and consolidation interventions of Palazzo della Ragione i Milan Lorenzo Jurina * Politecnico di Milano, Piazza L. D Vinc 32, Milano 20143, Italy Abstract Palazzo della Ragione, erected in 1233, represents one of the most ancient and relevant historic building of Milan. During the last century, the Palace suffered significant modifications, including the realization of an underground tunnel immediately near the foundations. Numerical analys s conducted with a FEM model were developed o t e basis of some experimental tests. In par icular, the diagnostic campaign performed in 1979, in which flat jacks a d dy amic tests were app ied, allow d to obtain useful information on the mechanical character zation of the masonry. In addition, the ex cution dynamic identificatio tests in 2017 retur ed the own frequ ncies of the build g 40 years l ter. Before to work on the structural pr ject, he autor verified the consiste cy between the structural response of the numerical model and th one of the real building, obtained by dynamic tests. Some consolidation interventions w re realized on the wooden truss s f the c ver, in o der to rest r eit r local and global safety ituation, with resp ct to ve tical and horizontal load. Copyright © 2018 Elsevier B.V. All rights reserved. Peer-review under responsibility of the CINPAR 2018 organizers K ywords: Dynamic t sts, Fin te Element Model, Seismic strengthening

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 Copyright © 2018 Elsevier B.V. All rights reserved. Peer-revi w u er responsibility of the CINPAR 2018 organizers. 2452 3216 Copyright © 2018 Elsevier B.V. All rights reserved. Peer-review under responsibility of the CINPAR 2018 organizers. * Corresponding author. Tel.: +39-02-95299167; fax: +39-02-95299167. E-mail address: Lorenzo.jurina@polimi.it * Corresponding author. Tel.: +39-02-95299167; fax: +39-02-95299167. E-mail address: Lorenzo.jurina@polimi.it

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