PSI - Issue 11

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ScienceDirect Available online at www.sciencedirect.com Available online at www.sciencedirect.com ScienceDirect Structural Integrity Procedia 00 (2016) 000 – 000 Procedia Structu al Integrity 11 (2018) 452–459 Structural Integrity Procedia 00 (2018) 000–000 Structural Integrity Procedia 00 (2018) 000–000 ScienceDirect Available online at www.sciencedirect.com ScienceDirect

www.elsevier.com/locate/procedia

www.elsevier.com/locate/procedia XIV International Conference on Building Pathology and Constructions Repair – CINPAR 2018 Effect of geometry parameters on the seismic capacity of masonry arches Cyrille Denis Tetougueni a* , Alex Zilio a , Paolo Zampieri a , Carlo Pellegrino a a Dept. of Civil, Architectural and Environmental Engineering, Via Marzolo 9, 35121 Padua, Italy Abstract The preservation of existing structures is an important issue nowadays because most of these structures have been built long time ago and are now considered as our cultural heritage. Among them, historical structures as bridges made with masonry arches are import nt, especially in Italy, where R man civilization w s born. T d y they are facing seismic action due to earthquake and most of them suffer great damages. It becomes important to assess the seismic load capacity of these structures since they were not initially designed to resist seismic loads in order to plan their streng hening. This work investigates the seismic capacity of masonry arches with irregular geometry through classical limit analysis method. In particular, two aspects of irregularity as asymmetric abutment dimensions and discontinuous arch thickness, with the aim to evaluate the collapse multiplier and position of cracking hinge are considered. At the end, parametric analysis were performed to show how the geometry irregularity influence the structural response of the arch. 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 Effect of geometry parameters on the seismic capacity of masonry arches Cyrille Denis Tetougueni a* , Alex Zilio a , Paolo Zampieri a , Carlo Pellegrino a a Dept. of Civil, Architectural and Environmental Engineering, Via Marzolo 9, 35121 Padua, Italy Abstract The preservation of existing structures is an important issue nowadays because most of these structures have been built long time ago and are now considered as our cultural herit ge. Among them, historical structures as bridges made with masonry arches are important, especially in Italy, where Roman civilization was born. Today they are facing seismic action due to earthquake and most of them suffer great damages. It becomes important to assess the seismic load capacity of these structures since they were not initially designed to resist seismic loads in order to plan their strengthening. This work investig tes the seismi capacity of masonry arches with irre ular geometry through class cal limit analysis method. In particular, two aspects of irregularity as asymmetric abutment dimensions and discontinuous arch thickness, with the aim to evaluate the collapse multiplier and position of cracking hinge are considered. At the end, parametric analysis were performed to show how the geom try irregularity influence the structur l response f the arch. Copyright © 2018 Elsevier B.V. All rights reserved. Peer-review under responsibility of the CINPAR 2018 organizers Copyright © 2018 Elsevier B.V. All rights reserved. Peer-review under responsibility of the CINPAR 2018 organizers Copyright © 2018 Elsevier B.V. All rights reserved. Peer-review under responsibility of the CINPAR 2018 organizers K ywords: collaps multiplier, asymmetric geometry, parametric alysi , strengthening

© 2016 The Authors. Published by Elsevier B.V. Peer-review under responsibility of the Scientific Committee of PCF 2016. Keywords: collapse multiplier, asymmetric geometry, parametric analysis, 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.: +39 049 827 5570 ; fax: +39 049 827 5570. E-mail address: cyrille.tetougueni@dicea.unipd.it * Corresponding author. Tel.: +39 049 827 5570 ; fax: +39 049 827 5570. E-mail address: cyrille.tetougueni@dicea.unipd.it

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