PSI - Issue 11

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) 25 –257 online at www.sciencedirect.com ScienceDirect Structural Integrity Procedia 00 (2018) 000–000 online at www.sciencedirect.com ScienceDirect Structural Integrity Procedia 00 (2018) 000–000

www.elsevier.com/locate/procedia www.elsevier.com/locate/procedia

www.elsevier.com/locate/procedia

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. Copyright © 2018 Elsevier B.V. All rights reserved. Peer-review under responsibility of the CINPAR 2018 organizers XIV International Conference on Building Pathology and Constructions Repair – CINPAR 2018 On the effectiveness of CFRP reinforcement of masonry panels loaded by out-of-plane actions Mario Fagone a* , Giovanna Ranocchiai a a Department of Civil and Environmental Engineering, University of Florence, via di S. Marta 3, 50139 Florence, Italy Abstract The use of composite materials, in particular Carbon Fiber Reinforced Polymers (CFRP), as reinforcement of masonry structures is more and more widespread in the structural rehabilitation and retrofitting of existing buildings. Several research findings reported in the literature demonstrated that externally bonded CFRP sheets can effectively increase the mechanical performance of masonry walls subjected to both in-plane and out-of-plane actions. Concerning the latter, most research activities refer to monotonic actions. Seeing the lack in the literature, the experimental program described in this paper is aimed to the analysis of the effects of load cycles in the out-of-plane behavior of reinforced masonry walls. Copy ght © 2018 Elsevier B.V. All rights reserved. Pe r-r view under res onsibility of the CINPAR 2018 organizers Keywords: masonry; CFRP; mechanical anchor; out-of-plane; structural reinforcement 1. Introduction A significant part of the existing buildings belonging to the World cultur l and historical heritage (particularly European and Italian) has masonry structure. The specific characteristics of such structures (e.g. the presence of thrusting elements, quality of the constituent materials and of continuity between different structural elements, brickwork, etc.) and, in particular, the very low tensile strength of masonry contribute to demine their seismic vulnerability. Different failure mechanisms can be activated by seismic actions: for example, both in-plane and out of-plane mechanisms can be induced in masonry walls and rigid-body mechanisms can be produced by thrusting XIV International Conference on Building Pathology and Constructions Repair – CINPAR 2018 On the effectiveness of CFRP reinforcement of masonry panels loaded by out-of-plane actions Mario Fagone a* , Giovanna Ranocchiai a a Department of Civil and Environmental Engineering, University of Florence, vi di S. Marta 3, 50139 Florence, Italy Abstract The use of composite materials, in particular Carbon Fiber Reinforced Polymers (CFRP), as reinforcement of masonry structures is more and more widespread in the structural rehabilitation and retrofitting of existing buildings. Several research findings reported i the lit ratur demonstrated that externally bonded CFRP sheets can eff ctively increase the mechanical performa ce of masonry walls subjected t both in-plane and out-of-plane actions. Concerning the latter, most research a tivities refer to monotonic actions. Seeing the lack in the lit rature, the experimental program described in this paper is aimed to the analysis of the effects of load cycles in the out-of-plane behavior of reinforc d masonry walls. Copyright © 2018 Elsevier B.V. All rights reserved. Peer-review under responsibility of the CINPAR 2018 organizers Keywords: masonry; CFRP; mechanical anchor; out-of-plane; structural reinforcement 1. Introduction A significant part of the existing buildings belonging to the World cul ural and historical eritage (particularly Eur p an and Italian) as mason y structure. The specific characteristics of such structures (e.g. the presence of thrusting elements, quality of the constituent materials and of continuity between different structural elements, brickwork, etc.) and, in particular, the very low tensile strength of masonry contribute to demine their seismic vulnerability. Different failure mechanisms can be activated by seismic actions: for example, both in-plane and out of-plane mechanisms can be induced in masonry walls and rigid-body mechanisms can be produced by thrusting © 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.

* 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 CINP R 2018 organizers. * Corresponding author. Tel.: +39 055 2756832; fax: +39 055 2758800. E-mail address: mario.fagone@unifi.it * Corresponding author. Tel.: +39 055 2756832; fax: +39 055 2758800. E-mail ad ress: mario.fagone@unifi.it

2452-3216 © 2016 The Authors. Published by Elsevier B.V. Peer-review under responsibility of the Scientific Committee of PCF 2016.

2452-3216 Copyright  2018 Elsevier B.V. All rights reserved. Peer-review under responsibility of the CINPAR 2018 organizers 10.1016/j.prostr.2018.11.033