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) 218–225 Available online at www.sciencedirect.com ScienceDirect Structural Integrity Procedia 00 (2018) 000 – 000 Available online at www.sciencedirect.com ScienceDirect Structural Integrity Procedia 00 (2018) 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. 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 Nonlinear modelling of the in-plane-out-of-plane interaction in the seismic analysis of masonry infills in r.c. framed buildings Fabio Mazza a, *, Angelo Donnici a a Department of Civil Engineering, Università della Calabria, 87036 Rende (Cosenza), Italy Abstract A five-element macro-model, with four diagonal out-of-plane (OP) nonlinear beams and one horizontal in-plane (IP) nonlinear truss, takes into account the OP and IP failure modes occurring, in the event of seismic loading, for masonry infills (MIs) inserted in reinforced concrete (r.c.) framed buildings. Pivot hysteretic models predict the nonlinear IP and OP force-displacement laws of the infill panel, based on geometrical rules defining loading and unloading branches. Firstly, a calibration of the proposed IP-OP interaction model of MIs is carried out considering full-scale experimental results of traditional masonry typologies. To evaluate the interaction, the numerical results of simultaneous IP and OP cyclic tests on MIs at the top, intermediate and lowest levels of an existing six-storey r.c. framed building are presented, assuming different displacement histories: i) OP loading faster than IP, at the sixth storey; ii) equal IP nd OP loading, at the third st rey; iii) IP loading faster than OP, at the first storey. Copyright © 2018 Elsevier B.V. All rights reserved. Peer-review under responsibility of the CINPAR 2018 organizers Keywords: masonry infills; in-plane and out-of-plane nonlinear behaviour; in-plane-out-of-plane interaction; infilled r.c. framed buildings; seismic analysis. 1. Introduction The out-of-plane (OP) behaviour of masonry infills (MIs), inserted in reinforced concrete (r.c.) framed buildings, is recognized as one of the most important failure modes of this non-structural element during an earthquake, which may be a consequ nce of simult neous or prior in-plane (IP) damag (Hak et al. 2012). The IP drift ratio is generally reduced at the upper storeys of buildings where, simultaneously, the OP drift ratio increases due to increase of XIV International Conference on Building Pathology and Constructions Repair – CINPAR 2018 Nonlinear modelling of the in-plane-out-of-plane interaction in the seismic analysis of masonry infills in r.c. framed buildings Fabio Mazza a, *, Angelo Donnici a a Department of Civil Engineering, Università della Calabria, 87036 Rende (Cosenza), Italy Abstract A five-element macro-model, with four diagonal out-of-plane (OP) nonlinear beams and one horizontal in-plane (IP) nonlinear truss, t kes into account the OP and IP failure modes occurring, in the eve t of seismic loadi g, for masonry infills (MIs) inserted in reinforced concrete (r.c.) framed buildings. Pivot hysteretic models predict the nonlinear IP and OP f rc -displ cement laws of he inf ll pa el, based on geometrical rules defining loading and unloading branches. Firstly, a calibration of the proposed IP-OP interacti model of MIs is carried out consideri g full-scale experimental results of traditional masonry typologies. To evaluate the interaction, the numerical results of simult neous IP and OP cyclic tests on MIs at the top, intermediate and lowest levels of an existing six-storey r.c. framed building re presented, as umi g different displacement histories: i) OP loading f ster tha IP, at the sixth storey; ii) equal IP and OP loading, at the third storey; iii) IP loading faster than OP, at the first storey. Copyright © 2018 Elsevier B.V. All rights reserved. Peer-review under responsibility of the CINPAR 2018 organizers Keywords: masonry infills; in-plane and out-of-plane nonlinear behaviour; in-plane-out-of-plane interaction; infilled r.c. framed buildings; seismic analysi . 1. Introduction The out-of-plane (OP) behaviour of masonry infills (MIs), inserted in reinforced concrete (r.c.) framed buildings, is recognized as one of the most important failure mod s f this non-structural element during an earthquake, which may be a consequence of si ultaneous or prior in-plane (IP) damage (Hak et al. 2012). The IP drift ratio is generally reduced at the upper storeys of buildings where, simultaneously, the OP drift ratio increases due to increase of © 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.: +39-0984-496908; fax: +39-0984-494045. E-mail address: fabio.mazza@unical.it * Corresponding author. Tel.: +39-0984-496908; fax: +39-0984-494045. E-mail address: f bio.mazza@unical.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.2018.11.029